Cleanup names in solar api months endpoint

.gitignore

@@ -1,6 +1,7 @@
 build/
 bin/
 samples/
+target/
 
 .vscode/
 !.vscode/settings.json
@@ -40,3 +41,7 @@ samples/
 *.out
 *.app
 
+# Sqlite database files
+*.db
+*.db-shm
+*.db-wal

.vscode/extensions.json

@@ -1,5 +1,7 @@
 {
   "recommendations": [
     "llvm-vs-code-extensions.vscode-clangd",
+    "ms-dotnettools.csharp",
+    "csharpier.csharpier-vscode",
   ]
 }

Cargo.toml

@@ -0,0 +1,15 @@
+[workspace]
+resolver = "3"
+members = ["src/electricity_api", "src/shared_api_lib", "src/solar_api"]
+
+[workspace.dependencies]
+chrono = "0.4.41"
+clap = "4.5.46"
+colog = "1.3.0"
+log = "0.4.27"
+rusqlite = "0.37.0"
+serde = "1.0.219"
+serde_json = "1.0.143"
+shared_api_lib = { path = "../shared_api_lib" }
+tokio = "1"
+warp = "0.4"

README.md

@@ -14,10 +14,10 @@ A mono repository containing all the homebrew collectors and REST APIs running o
 
 ### Runtime (server)
 
-- .NET 6, [website](https://dotnet.microsoft.com/en-us/download/dotnet/6.0)
 - Curl: the multiprotocol file tranfser library, [website](https://curl.haxx.se/libcurl/)
 - GNU Make, [website](https://www.gnu.org/software/make/)
 - Libfmt, [website](https://github.com/fmtlib/fmt)
+- Rust, [website](https://www.rust-lang.org/learn/get-started)
 - Spdlog, [website](https://github.com/gabime/spdlog)
 - Sqlite3: a small SQL database engine, v3.39.2, [website](https://www.sqlite.org/index.html)
 
@@ -27,7 +27,6 @@ In addition to all the runtime dependencies the following dependencies are requi
 
 - A C++20 compatible compiler
 - Nlohmann JSON, [website](https://github.com/nlohmann/json/tree/v3.11.2)
-- cxxopts, [website](https://github.com/jarro2783/cxxopts/tree/v3.0.0)
 
 ## Examples
 

src/Electricity.Api/.gitignore

@@ -1,2 +0,0 @@
-obj/
-bin/

src/Electricity.Api/Constants.cs

@@ -1,6 +0,0 @@
-namespace Electricity.Api;
-
-internal static class Constants
-{
-    public const string isoDateFormat = "yyyy-MM-dd";
-}

src/Electricity.Api/Controllers/ElectricityLogController.cs

@@ -1,60 +0,0 @@
-using System.Net.Mime;
-using Electricity.Api.Models;
-using Electricity.Api.Services;
-using Microsoft.AspNetCore.Mvc;
-
-namespace Electricity.Api.Controllers;
-
-[ApiController]
-[Consumes(MediaTypeNames.Application.Json)]
-[Produces(MediaTypeNames.Application.Json)]
-public class ElectricityLogController : ControllerBase
-{
-    private readonly ElectricityService electricityService;
-    private readonly ILogger<ElectricityLogController> logger;
-
-    public ElectricityLogController(
-        ElectricityService electricityService,
-        ILogger<ElectricityLogController> logger)
-    {
-        this.electricityService = electricityService;
-        this.logger = logger;
-    }
-
-    [HttpGet()]
-    [Route("/day")]
-    public async Task<ActionResult<Minute[]>> Get([FromQuery] string? date)
-    {
-        if (string.IsNullOrWhiteSpace(date) || !DateOnly.TryParseExact(date, Constants.isoDateFormat, out _))
-        {
-            return BadDateParameter(nameof(date));
-        }
-
-        return await electricityService.GetDetailsFor(date);
-    }
-
-    [HttpGet()]
-    [Route("/days")]
-    public async Task<ActionResult<Day[]>> Get([FromQuery] string? start, [FromQuery] string? stop)
-    {
-        if (string.IsNullOrWhiteSpace(start) || !DateOnly.TryParseExact(start, Constants.isoDateFormat, out _))
-        {
-            return BadDateParameter(nameof(start));
-        }
-
-        if (string.IsNullOrWhiteSpace(stop) || !DateOnly.TryParseExact(stop, Constants.isoDateFormat, out _))
-        {
-            return BadDateParameter(nameof(stop));
-        }
-
-        if (string.Compare(start, stop) > 0)
-        {
-            return BadRequest($"The date argument of {nameof(stop)} must be greater or equal to the argument value of {nameof(start)}");
-        }
-
-        return await electricityService.GetSummariesFor(start, stop);
-    }
-
-    private BadRequestObjectResult BadDateParameter(string parameterName) =>
-        BadRequest($"The search parameter {parameterName} is missing or is not a valid ISO date ({Constants.isoDateFormat}).");
-}

src/Electricity.Api/DatabaseContext.cs

@@ -1,45 +0,0 @@
-using Electricity.Api.Entities;
-using Microsoft.EntityFrameworkCore;
-
-namespace Electricity.Api
-{
-    public partial class DatabaseContext : DbContext
-    {
-        public DatabaseContext()
-        {
-        }
-
-        public DatabaseContext(DbContextOptions<DatabaseContext> options)
-            : base(options)
-        {
-        }
-
-        public virtual DbSet<ElectricityLog> ElectricityLogs { get; set; } = null!;
-
-        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
-        {
-            if (!optionsBuilder.IsConfigured)
-            {
-                optionsBuilder.UseSqlite("Data Source=test.db");
-            }
-        }
-
-        protected override void OnModelCreating(ModelBuilder modelBuilder)
-        {
-            modelBuilder.Entity<ElectricityLog>(entity =>
-            {
-                entity.HasNoKey();
-
-                entity.ToTable("ElectricityLog");
-
-                entity.HasIndex(e => e.Date, "idx_Date");
-
-                entity.HasIndex(e => e.TimeUtc, "idx_TimeUtc");
-            });
-
-            OnModelCreatingPartial(modelBuilder);
-        }
-
-        partial void OnModelCreatingPartial(ModelBuilder modelBuilder);
-    }
-}

src/Electricity.Api/Electricity.Api.csproj

@@ -1,20 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk.Web">
-
-  <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
-    <Nullable>enable</Nullable>
-    <ImplicitUsings>enable</ImplicitUsings>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.0">
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-      <PrivateAssets>all</PrivateAssets>
-    </PackageReference>
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="8.0.0" />
-    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.0" />
-    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.5.0" />
-    <PackageReference Include="System.CommandLine" Version="2.0.0-beta4.22272.1" />
-  </ItemGroup>
-
-</Project>

src/Electricity.Api/Entities/ElectricityLog.cs

@@ -1,23 +0,0 @@
-namespace Electricity.Api.Entities
-{
-    public partial class ElectricityLog
-    {
-        public string Date { get; set; } = null!;
-        public string TimeUtc { get; set; } = null!;
-        public double CurrentPowerUsage { get; set; }
-        public double TotalPowerConsumptionDay { get; set; }
-        public double TotalPowerConsumptionNight { get; set; }
-        public double CurrentPowerReturn { get; set; }
-        public double TotalPowerReturnDay { get; set; }
-        public double TotalPowerReturnNight { get; set; }
-        public long DayTarifEnabled { get; set; }
-        public double GasConsumptionInCubicMeters { get; set; }
-
-        public DateTime GetDateTime() => DateTime
-            .Parse(
-                $"{Date}T{TimeUtc}Z",
-                null,
-                System.Globalization.DateTimeStyles.AssumeUniversal)
-            .ToUniversalTime();
-    }
-}

src/Electricity.Api/Extensions/DateTimeExtensions.cs

@@ -1,7 +0,0 @@
-namespace Electricity.Api.Extensions;
-
-public static class DateTimeExtensions
-{
-    public static uint ToEpoch(this DateTime dateTime) =>
-        (uint)Math.Round((dateTime - DateTime.UnixEpoch).TotalSeconds);
-}

src/Electricity.Api/Models/Day.cs

@@ -1,23 +0,0 @@
-using Electricity.Api.Extensions;
-
-namespace Electricity.Api.Models;
-
-public record Day(string Date, double TotalPowerUse, double TotalPowerReturn, double TotalGasUse)
-{
-    public static Day Empty(DateOnly date)
-    {
-        return new Day(
-            date.ToString(Constants.isoDateFormat),
-            0, 0, 0);
-    }
-
-    public static Day FromEntity(Entities.ElectricityLog entity)
-    {
-        return new Day(
-            Date: entity.Date,
-            TotalPowerUse: entity.TotalPowerConsumptionDay + entity.TotalPowerConsumptionNight,
-            TotalPowerReturn: entity.TotalPowerReturnDay + entity.TotalPowerReturnNight,
-            TotalGasUse: entity.GasConsumptionInCubicMeters
-        );
-    }
-};

src/Electricity.Api/Models/Minute.cs

@@ -1,24 +0,0 @@
-using Electricity.Api.Extensions;
-
-namespace Electricity.Api.Models;
-
-public record Minute(uint DateTime, double CurrentPowerUsage, double TotalPowerUse, double TotalPowerReturn, double TotalGasUse)
-{
-    public static Minute Empty(DateOnly date)
-    {
-        return new Minute(
-            date.ToDateTime(new TimeOnly(0, 0), DateTimeKind.Utc).ToEpoch(),
-            0, 0, 0, 0);
-    }
-
-    public static Minute FromEntity(Entities.ElectricityLog entity)
-    {
-        return new Minute(
-            DateTime: entity.GetDateTime().ToEpoch(),
-            CurrentPowerUsage: entity.CurrentPowerUsage,
-            TotalPowerUse: entity.TotalPowerConsumptionDay + entity.TotalPowerConsumptionNight,
-            TotalPowerReturn: entity.TotalPowerReturnDay + entity.TotalPowerReturnNight,
-            TotalGasUse: entity.GasConsumptionInCubicMeters
-        );
-    }
-};

src/Electricity.Api/Program.cs

@@ -1,71 +0,0 @@
-using System.CommandLine;
-using Electricity.Api;
-using Electricity.Api.Services;
-using Microsoft.EntityFrameworkCore;
-
-var rootCommand = new RootCommand("ElectricityServer is a small REST API to access the electricity log database");
-var connectionStringArgument = new Option<string>(
-    name: "--connection-string",
-    description: "Filepath to the Sqlite3 database file (*.db)");
-rootCommand.AddOption(connectionStringArgument);
-
-var result = rootCommand.Parse(args);
-
-if (result.Errors.Any())
-{
-    foreach (var error in result.Errors)
-    {
-        Console.WriteLine(error.Message);
-    }
-    return 1;
-}
-
-var sqlite3DatabaseFilePath = result.GetValueForOption(connectionStringArgument);
-if (!File.Exists(sqlite3DatabaseFilePath))
-{
-    Console.WriteLine($"Sqlite3 database <{sqlite3DatabaseFilePath}> does not exist or is inaccessible");
-    return 1;
-}
-
-var builder = WebApplication.CreateBuilder(args);
-builder.Services.AddDbContext<DatabaseContext>((DbContextOptionsBuilder builder) =>
-{
-    builder.UseSqlite($"Data Source={sqlite3DatabaseFilePath}");
-});
-
-builder.Services.AddCors(options =>
-{
-    options.AddPolicy(
-        name: "default",
-        policy =>
-        {
-            policy.WithOrigins("http://localhost:8080");
-        });
-});
-
-builder.Services.AddControllers()
-    .AddJsonOptions(config =>
-    {
-        config.JsonSerializerOptions.PropertyNamingPolicy = System.Text.Json.JsonNamingPolicy.CamelCase;
-        config.JsonSerializerOptions.WriteIndented = true;
-    });
-builder.Services.AddSwaggerGen();
-builder.Services.AddScoped<ElectricityService>();
-
-var app = builder.Build();
-
-if (app.Environment.IsDevelopment())
-{
-    app.UseHttpsRedirection();
-    app.UseSwagger();
-    app.UseSwaggerUI();
-    app.UseCors("default");
-}
-
-app.UseAuthorization();
-
-app.MapControllers();
-
-app.Run();
-
-return 0;

src/Electricity.Api/Properties/launchSettings.json

@@ -1,31 +0,0 @@
-{
-  "$schema": "https://json.schemastore.org/launchsettings.json",
-  "iisSettings": {
-    "windowsAuthentication": false,
-    "anonymousAuthentication": true,
-    "iisExpress": {
-      "applicationUrl": "http://localhost:44706",
-      "sslPort": 44335
-    }
-  },
-  "profiles": {
-    "Electricity.Api": {
-      "commandName": "Project",
-      "dotnetRunMessages": true,
-      "launchBrowser": true,
-      "launchUrl": "swagger",
-      "applicationUrl": "https://localhost:7290;http://localhost:5093",
-      "environmentVariables": {
-        "ASPNETCORE_ENVIRONMENT": "Development"
-      }
-    },
-    "IIS Express": {
-      "commandName": "IISExpress",
-      "launchBrowser": true,
-      "launchUrl": "swagger",
-      "environmentVariables": {
-        "ASPNETCORE_ENVIRONMENT": "Development"
-      }
-    }
-  }
-}

src/Electricity.Api/Services/ElectricityService.cs

@@ -1,66 +0,0 @@
-using Electricity.Api.Models;
-using Microsoft.EntityFrameworkCore;
-
-namespace Electricity.Api.Services;
-
-public class ElectricityService
-{
-    private readonly DatabaseContext databaseContext;
-
-    public ElectricityService(DatabaseContext databaseContext)
-    {
-        this.databaseContext = databaseContext;
-    }
-
-    public async Task<Minute[]> GetDetailsFor(string date)
-    {
-        return (await databaseContext.ElectricityLogs
-            .Where(l => l.Date == date)
-            .OrderBy(l => l.TimeUtc)
-            .ToArrayAsync())
-            .Select(Minute.FromEntity)
-            .ToArray();
-    }
-
-    public async Task<Day[]> GetSummariesFor(string from, string to)
-    {
-        var list = new List<Day>();
-        var current = DateOnly.ParseExact(from, Constants.isoDateFormat);
-        var limit = DateOnly.ParseExact(to, Constants.isoDateFormat);
-        do
-        {
-            list.Add(await GetSummaryFor(current));
-            current = current.AddDays(1);
-        } while (current <= limit);
-
-        return list.ToArray();
-    }
-
-    private async Task<Day> GetSummaryFor(DateOnly date)
-    {
-        var databaseDate = date.ToString(Constants.isoDateFormat);
-        var baseQuery = databaseContext.ElectricityLogs
-            .Where(l => l.Date == databaseDate)
-            .OrderBy(l => l.TimeUtc);
-        var first = await baseQuery.FirstOrDefaultAsync();
-        if (first == null)
-        {
-            return Day.Empty(date);
-        }
-        var last = await baseQuery.LastAsync();
-
-        var firstAsModel = Day.FromEntity(first);
-        if (last.TimeUtc == first.TimeUtc)
-        {
-            return Day.Empty(date);
-        }
-
-        var lastAsModel = Day.FromEntity(last);
-        return new Day(
-            lastAsModel.Date,
-            lastAsModel.TotalPowerUse - firstAsModel.TotalPowerUse,
-            lastAsModel.TotalPowerReturn - firstAsModel.TotalPowerReturn,
-            lastAsModel.TotalGasUse - firstAsModel.TotalGasUse
-        );
-    }
-}

src/Electricity.Api/appsettings.Development.json

@@ -1,8 +0,0 @@
-{
-  "Logging": {
-    "LogLevel": {
-      "Default": "Information",
-      "Microsoft.AspNetCore": "Warning"
-    }
-  }
-}

src/Electricity.Api/appsettings.json

@@ -1,9 +0,0 @@
-{
-  "Logging": {
-    "LogLevel": {
-      "Default": "Information",
-      "Microsoft.AspNetCore": "Warning"
-    }
-  },
-  "AllowedHosts": "*"
-}

src/Electricity.Api/publish.sh

@@ -1,3 +0,0 @@
-#!/bin/bash
-
-dotnet publish -c Release -r linux-arm --no-self-contained

src/Solar.Api/.gitignore

@@ -1,2 +0,0 @@
-bin/
-obj/

src/Solar.Api/Constants/CacheKeys.cs

@@ -1,9 +0,0 @@
-namespace Solar.Api.Constants;
-
-internal static class CacheKeys
-{
-    public static string GetMonthSummaryCacheKey(string source, int year, int month)
-    {
-        return $"month-summary-{source}-{year}-{month}";
-    }
-}

src/Solar.Api/Constants/Format.cs

@@ -1,6 +0,0 @@
-namespace Solar.Api.Constants;
-
-internal static class Format
-{
-    public const string Date = "yyyy-MM-dd";
-}

src/Solar.Api/Controllers/SolarLogController.cs

@@ -1,125 +0,0 @@
-using Microsoft.AspNetCore.Mvc;
-using Solar.Api.Models;
-using Solar.Api.Services;
-using Swashbuckle.AspNetCore.Annotations;
-using System.Net.Mime;
-
-namespace Solar.Api.Controllers;
-
-[ApiController]
-[Consumes(MediaTypeNames.Application.Json)]
-[Produces(MediaTypeNames.Application.Json)]
-public class SolarLogController : ControllerBase
-{
-    private readonly SolarService solarService;
-    private readonly ILogger<SolarLogController> logger;
-
-    public SolarLogController(
-        SolarService solarService,
-        ILogger<SolarLogController> logger)
-    {
-        this.solarService = solarService;
-        this.logger = logger;
-    }
-
-    [HttpGet()]
-    [Route("/day")]
-    public async Task<ActionResult<DayResponse>> GetDayDetails(
-        [SwaggerParameter(Required = true)]
-        [SwaggerSchema(Format = "date")]
-        [FromQuery]
-        string date)
-    {
-        var parsedDate = TryParseDate(date);
-        if (!parsedDate.HasValue || parsedDate.Value.Year < 2000 || parsedDate.Value.Year > 3000)
-        {
-            logger.LogInformation("Invalid date {Date} requested", date);
-            return BadRequest();
-        }
-
-        return await solarService.GetDayDetails(parsedDate.Value);
-    }
-
-    /// Parameter <parameter>to</parameter> is inclusive
-    [HttpGet()]
-    [Route("/days")]
-    public async Task<ActionResult<DaysResponse>> GetDaySummaries(
-        [SwaggerParameter(Required = true)]
-        [SwaggerSchema(Format = "date")]
-        [FromQuery]
-        string start,
-        [SwaggerParameter(Required = true)]
-        [SwaggerSchema(Format = "date")]
-        [FromQuery]
-        string stop)
-    {
-        var parsedStartDate = TryParseDate(start);
-        if (!parsedStartDate.HasValue || parsedStartDate.Value.Year < 2000 || parsedStartDate.Value.Year > 3000)
-        {
-            logger.LogInformation("Invalid start date {Date} requested", start);
-            return BadRequest();
-        }
-
-        var parsedStopDate = TryParseDate(stop);
-        if (!parsedStopDate.HasValue || parsedStopDate.Value.Year < 2000 || parsedStopDate.Value.Year > 3000)
-        {
-            logger.LogInformation("Invalid stop date {Date} requested", stop);
-            return BadRequest();
-        }
-        else if (parsedStopDate < parsedStartDate)
-        {
-            logger.LogInformation("Stop date {StopDate} must come before start date {StartDate} requested", stop, start);
-            return BadRequest();
-        }
-
-        return await solarService.GetDaySummaries(parsedStartDate.Value, parsedStopDate.Value);
-    }
-
-    [HttpGet()]
-    [Route("/months")]
-    public async Task<ActionResult<MonthSummariesResponse>> GetMonthSummaries(
-        [SwaggerParameter(Required = true)]
-        [SwaggerSchema(Format = "yyyy-MM")]
-        [FromQuery]
-        string start,
-        [SwaggerParameter(Required = true)]
-        [SwaggerSchema(Format = "yyyy-MM")]
-        [FromQuery]
-        string stop)
-    {
-        var parsedStartDate = TryParseDate($"{start}-01");
-        if (!parsedStartDate.HasValue || parsedStartDate.Value.Year < 2000 || parsedStartDate.Value.Year > 3000)
-        {
-            logger.LogInformation("Invalid start year month {YearMonth} requested", start);
-            return BadRequest();
-        }
-
-        var parsedStopDate = TryParseDate($"{stop}-01");
-        if (!parsedStopDate.HasValue || parsedStopDate.Value.Year < 2000 || parsedStopDate.Value.Year > 3000)
-        {
-            logger.LogInformation("Invalid stop year month {YearMonth} requested", stop);
-            return BadRequest();
-        }
-        else if (parsedStopDate < parsedStartDate)
-        {
-            logger.LogInformation("Stop year month {StopYearMonth} must come before start year month {StartYearMonth} requested", stop, start);
-            return BadRequest();
-        }
-
-        return await solarService.GetMonthSummaries(
-            parsedStartDate.Value.Year,
-            parsedStartDate.Value.Month,
-            parsedStopDate.Value.Year,
-            parsedStopDate.Value.Month);
-    }
-
-    private static DateOnly? TryParseDate(string value)
-    {
-        if (DateOnly.TryParseExact(value, "yyyy-MM-dd", out var date))
-        {
-            return date;
-        }
-
-        return null;
-    }
-}

src/Solar.Api/Converters/DateOnlyConverter.cs

@@ -1,24 +0,0 @@
-using System.Text.Json;
-using System.Text.Json.Serialization;
-
-namespace Solar.Api.Converters;
-
-public class DateOnlyConverter : JsonConverter<DateOnly>
-{
-    private const string serializationFormat = "yyyy-MM-dd";
-
-    public override DateOnly Read(
-        ref Utf8JsonReader reader,
-        Type typeToConvert,
-        JsonSerializerOptions options)
-    {
-        var value = reader.GetString();
-        return DateOnly.ParseExact(value!, serializationFormat);
-    }
-
-    public override void Write(
-        Utf8JsonWriter writer,
-        DateOnly value,
-        JsonSerializerOptions options)
-        => writer.WriteStringValue(value.ToString(serializationFormat));
-}

src/Solar.Api/Converters/TimeOnlyConverter.cs

@@ -1,24 +0,0 @@
-using System.Text.Json;
-using System.Text.Json.Serialization;
-
-namespace Solar.Api.Converters;
-
-public class TimeOnlyConverter : JsonConverter<TimeOnly>
-{
-    private const string serializationFormat = "HH:mm";
-
-    public override TimeOnly Read(
-        ref Utf8JsonReader reader,
-        Type typeToConvert,
-        JsonSerializerOptions options)
-    {
-        var value = reader.GetString();
-        return TimeOnly.ParseExact(value!, serializationFormat);
-    }
-
-    public override void Write(
-        Utf8JsonWriter writer,
-        TimeOnly value,
-        JsonSerializerOptions options)
-        => writer.WriteStringValue(value.ToString(serializationFormat));
-}

src/Solar.Api/DatabaseContext.cs

@@ -1,63 +0,0 @@
-using Microsoft.EntityFrameworkCore;
-using Solar.Api.Entities;
-
-namespace Solar.Api
-{
-    public partial class DatabaseContext : DbContext
-    {
-        public DatabaseContext()
-        {
-        }
-
-        public DatabaseContext(DbContextOptions<DatabaseContext> options)
-            : base(options)
-        {
-        }
-
-        public virtual DbSet<EnvoyLog> EnvoyLogs { get; set; } = null!;
-        public virtual DbSet<ZeverLog> ZeverLogs { get; set; } = null!;
-        public virtual DbSet<ZeverSummary> ZeverSummaries { get; set; } = null!;
-
-        protected override void OnModelCreating(ModelBuilder modelBuilder)
-        {
-            modelBuilder.Entity<EnvoyLog>(entity =>
-            {
-                entity.HasIndex(e => e.Date, "idx_EnvoyLogs_Date");
-
-                entity.HasIndex(e => e.TimeUtc, "idx_EnvoyLogs_TimeUtc");
-
-                entity.HasIndex(e => e.TotalWatts, "idx_EnvoyLogs_TotalWatts");
-
-                entity.Property(e => e.TotalWatts).HasColumnType("BIGINT");
-            });
-
-            modelBuilder.Entity<ZeverLog>(entity =>
-            {
-                entity.HasIndex(e => e.Date, "idx_ZeverLogs_Date");
-
-                entity.HasIndex(e => e.TimeUtc, "idx_ZeverLogs_TimeUtc");
-
-                entity.HasIndex(e => e.TotalWatts, "idx_ZeverLogs_TotalWatts");
-
-                entity.Property(e => e.TotalWatts).HasColumnType("BIGINT");
-            });
-
-            modelBuilder.Entity<ZeverSummary>(entity =>
-            {
-                entity.ToTable("ZeverSummary");
-
-                entity.HasIndex(e => e.Date, "IX_ZeverSummary_Date")
-                    .IsUnique();
-
-                entity.HasIndex(e => e.Date, "idx_ZeverSummary_Date")
-                    .IsUnique();
-
-                entity.Property(e => e.TotalWatts).HasColumnType("BIGINT");
-            });
-
-            OnModelCreatingPartial(modelBuilder);
-        }
-
-        partial void OnModelCreatingPartial(ModelBuilder modelBuilder);
-    }
-}

src/Solar.Api/Entities/EnvoyLog.cs

@@ -1,12 +0,0 @@
-namespace Solar.Api.Entities
-{
-    public partial class EnvoyLog
-    {
-        public long Id { get; set; }
-        public DateOnly Date { get; set; }
-        public TimeOnly TimeUtc { get; set; }
-        public long CurrentWatts { get; set; }
-        public long TotalWatts { get; set; }
-        public long Inverters { get; set; }
-    }
-}

src/Solar.Api/Entities/ZeverLog.cs

@@ -1,11 +0,0 @@
-namespace Solar.Api.Entities
-{
-    public partial class ZeverLog
-    {
-        public long Id { get; set; }
-        public DateOnly Date { get; set; }
-        public TimeOnly TimeUtc { get; set; }
-        public long CurrentWatts { get; set; }
-        public long TotalWatts { get; set; }
-    }
-}

src/Solar.Api/Entities/ZeverSummary.cs

@@ -1,9 +0,0 @@
-namespace Solar.Api.Entities
-{
-    public partial class ZeverSummary
-    {
-        public long Id { get; set; }
-        public DateOnly Date { get; set; }
-        public long TotalWatts { get; set; }
-    }
-}

src/Solar.Api/Models/DayResponse.cs

@@ -1,4 +0,0 @@
-
-namespace Solar.Api.Models;
-
-public record DayResponse(ZeverDayLog[] ZeverLogs, EnvoyDayLog[] EnvoyLogs);

src/Solar.Api/Models/DaySummaryLog.cs

@@ -1,3 +0,0 @@
-namespace Solar.Api.Models;
-
-public record DaySummaryLog(DateOnly Date, int ZeverTotalWatts, int EnvoyTotalWatts);

src/Solar.Api/Models/DaysResponse.cs

@@ -1,3 +0,0 @@
-namespace Solar.Api.Models;
-
-public record DaysResponse(DaySummaryLog[] DayLogs);

src/Solar.Api/Models/EnvoyDayLog.cs

@@ -1,3 +0,0 @@
-namespace Solar.Api.Models;
-
-public record EnvoyDayLog(TimeOnly TimeUtc, int CurrentWatts, int TotalWatts);

src/Solar.Api/Models/MonthLog.cs

@@ -1,3 +0,0 @@
-namespace Solar.Api.Models;
-
-public record MonthLog(int Year, int Month, int ZeverTotalWatts, int EnvoyTotalWatts);

src/Solar.Api/Models/MonthSummariesResponse.cs

@@ -1,3 +0,0 @@
-namespace Solar.Api.Models;
-
-public record MonthSummariesResponse(MonthLog[] MonthLogs);

src/Solar.Api/Models/ZeverDayLog.cs

@@ -1,3 +0,0 @@
-namespace Solar.Api.Models;
-
-public record ZeverDayLog(TimeOnly TimeUtc, int CurrentWatts, int TotalWatts);

src/Solar.Api/Program.cs

@@ -1,81 +0,0 @@
-using Microsoft.EntityFrameworkCore;
-using Microsoft.OpenApi.Models;
-using Solar.Api.Converters;
-using Solar.Api.Services;
-using Swashbuckle.AspNetCore.SwaggerGen;
-using System.Text.Json;
-
-namespace Solar.Api;
-
-public partial class Program
-{
-    public static void Main(string[] args)
-    {
-        var builder = WebApplication.CreateBuilder(args);
-
-        // Services
-        builder.Services.AddScoped<SolarService>();
-        builder.Services.AddMemoryCache();
-
-        // Database
-        builder.Services.AddDbContext<DatabaseContext>(options =>
-        {
-            options.UseSqlite(builder.Configuration.GetConnectionString("Database"));
-        });
-
-        // REST infrastructure
-        builder.Services.AddCors(options =>
-        {
-            options.AddPolicy(
-                name: "default",
-                policy =>
-                {
-                    policy.WithOrigins("http://localhost:8080");
-                });
-        });
-
-        builder.Services.AddControllers().AddJsonOptions(config =>
-        {
-            config.JsonSerializerOptions.PropertyNamingPolicy = JsonNamingPolicy.CamelCase;
-            config.JsonSerializerOptions.PropertyNameCaseInsensitive = true;
-            config.JsonSerializerOptions.Converters.Add(new DateOnlyConverter());
-            config.JsonSerializerOptions.Converters.Add(new TimeOnlyConverter());
-        });
-        builder.Services.AddEndpointsApiExplorer();
-        builder.Services.AddSwaggerGen(config =>
-        {
-            config.MapType<DateOnly>(() => new OpenApiSchema
-            {
-                Type = "string",
-                Format = "date",
-                Example = OpenApiAnyFactory.CreateFromJson("\"2022-12-31\"")
-            });
-            config.MapType<TimeOnly>(() => new OpenApiSchema
-            {
-                Type = "string",
-                Format = "time",
-                Example = OpenApiAnyFactory.CreateFromJson("\"13:45:42.0000000\"")
-            });
-
-            config.SupportNonNullableReferenceTypes();
-            config.EnableAnnotations();
-        });
-
-        var app = builder.Build();
-
-        // Configure the HTTP request pipeline.
-        if (app.Environment.IsDevelopment())
-        {
-            app.UseHttpsRedirection();
-            app.UseSwagger();
-            app.UseSwaggerUI();
-            app.UseCors("default");
-        }
-
-        app.UseAuthorization();
-
-        app.MapControllers();
-
-        app.Run();
-    }
-}

src/Solar.Api/Properties/launchSettings.json

@@ -1,31 +0,0 @@
-{
-  "$schema": "https://json.schemastore.org/launchsettings.json",
-  "iisSettings": {
-    "windowsAuthentication": false,
-    "anonymousAuthentication": true,
-    "iisExpress": {
-      "applicationUrl": "http://localhost:16253",
-      "sslPort": 44321
-    }
-  },
-  "profiles": {
-    "Solar.Api": {
-      "commandName": "Project",
-      "dotnetRunMessages": true,
-      "launchBrowser": true,
-      "launchUrl": "swagger",
-      "applicationUrl": "https://localhost:7012;http://localhost:5199",
-      "environmentVariables": {
-        "ASPNETCORE_ENVIRONMENT": "Development"
-      }
-    },
-    "IIS Express": {
-      "commandName": "IISExpress",
-      "launchBrowser": true,
-      "launchUrl": "swagger",
-      "environmentVariables": {
-        "ASPNETCORE_ENVIRONMENT": "Development"
-      }
-    }
-  }
-}

src/Solar.Api/Services/SolarService.cs

@@ -1,179 +0,0 @@
-using Microsoft.EntityFrameworkCore;
-using Microsoft.Extensions.Caching.Memory;
-using Solar.Api.Constants;
-using Solar.Api.Entities;
-using Solar.Api.Models;
-
-namespace Solar.Api.Services;
-
-public class SolarService
-{
-    private readonly DatabaseContext databaseContext;
-    private readonly IMemoryCache memoryCache;
-    private readonly ILogger<SolarService> logger;
-
-    public SolarService(
-        DatabaseContext databaseContext,
-        IMemoryCache memoryCache,
-        ILogger<SolarService> logger)
-    {
-        this.databaseContext = databaseContext;
-        this.memoryCache = memoryCache;
-
-        this.logger = logger;
-    }
-
-    public async Task<DayResponse> GetDayDetails(DateOnly date)
-    {
-        var zeverRecords = await databaseContext
-            .ZeverLogs
-            .Where(zl => zl.Date == date)
-            .OrderBy(zl => zl.TimeUtc)
-            .ToArrayAsync();
-        var envoyRecords = await databaseContext
-            .EnvoyLogs
-            .Where(er => er.Date == date)
-            .OrderBy(er => er.TimeUtc)
-            .ToArrayAsync();
-
-        NormalizeEnvoyLogs(envoyRecords);
-
-        return new DayResponse(
-            zeverRecords
-                .Select(zr => new ZeverDayLog(
-                    zr.TimeUtc,
-                    (int)zr.CurrentWatts,
-                    (int)zr.TotalWatts))
-                .ToArray(),
-            envoyRecords
-                .Select(er => new EnvoyDayLog(
-                    er.TimeUtc,
-                    (int)er.CurrentWatts,
-                    (int)er.TotalWatts))
-                .ToArray());
-    }
-
-    private static void NormalizeEnvoyLogs(EnvoyLog[] entities)
-    {
-        if (entities.Length < 1)
-        {
-            return;
-        }
-
-        var baseValue = entities[0].TotalWatts;
-        foreach (var entity in entities)
-        {
-            entity.TotalWatts -= baseValue;
-        }
-    }
-
-    public async Task<DaysResponse> GetDaySummaries(DateOnly start, DateOnly stop)
-    {
-        var zeverRecords = await databaseContext
-            .ZeverSummaries
-            .Where(zl => zl.Date >= start && zl.Date <= stop)
-            .ToArrayAsync();
-
-        List<DaySummaryLog> logs = new();
-        var current = start;
-        do
-        {
-            var zeverResult = zeverRecords.FirstOrDefault(zr => zr.Date == current)?.TotalWatts ?? 0;
-            var envoyResult = await GetEnvoyDayTotalWatts(current);
-
-            logs.Add(new DaySummaryLog(
-                current,
-                (int)zeverResult,
-                envoyResult));
-
-            current = current.AddDays(1);
-        } while (current <= stop);
-
-        return new DaysResponse(logs.ToArray());
-    }
-
-    private async Task<int> GetEnvoyDayTotalWatts(DateOnly date)
-    {
-        var min = await databaseContext.EnvoyLogs
-            .Where(el => el.Date == date)
-            .OrderBy(el => el.TotalWatts)
-            .FirstOrDefaultAsync();
-        var max = await databaseContext.EnvoyLogs
-            .Where(el => el.Date == date)
-            .OrderByDescending(el => el.TotalWatts)
-            .FirstOrDefaultAsync();
-
-        if (min == null || max == null)
-        {
-            return 0;
-        }
-
-        return (int)(max.TotalWatts - min.TotalWatts);
-    }
-
-    public async Task<MonthSummariesResponse> GetMonthSummaries(int fromYear, int fromMonth, int toYear, int toMonth)
-    {
-        var results = new List<MonthLog>();
-        var current = (Year: fromYear, Month: fromMonth);
-        do
-        {
-            var zeverResult = await GetOrAddToCache("zever", current.Year, current.Month, GetZeverMonthTotalWatts);
-            var envoyYear = await GetOrAddToCache("envoy", current.Year, current.Month, GetEnvoyMonthTotalWatts);
-            results.Add(new MonthLog(current.Year, current.Month, zeverResult, envoyYear));
-
-            if (current.Month == 12)
-            {
-                current = (current.Year + 1, 1);
-            }
-            else
-            {
-                current = (current.Year, current.Month + 1);
-            }
-        } while (current.Year < toYear || current.Month < toMonth);
-        return new MonthSummariesResponse(results.ToArray());
-    }
-
-    private async Task<int> GetZeverMonthTotalWatts(int year, int month)
-    {
-        return (int)await databaseContext.ZeverSummaries
-            .Where(zs => zs.Date.Year == year && zs.Date.Month == month)
-            .SumAsync(zs => zs.TotalWatts);
-    }
-
-    private async Task<int> GetEnvoyMonthTotalWatts(int year, int month)
-    {
-        var min = await databaseContext.EnvoyLogs
-            .Where(el => el.Date.Year == year && el.Date.Month == month)
-            .OrderBy(el => el.TotalWatts)
-            .FirstOrDefaultAsync();
-        var max = await databaseContext.EnvoyLogs
-            .Where(el => el.Date.Year == year && el.Date.Month == month)
-            .OrderByDescending(el => el.TotalWatts)
-            .FirstOrDefaultAsync();
-
-        if (min == null || max == null)
-        {
-            return 0;
-        }
-
-        return (int)(max.TotalWatts - min.TotalWatts);
-    }
-
-    private async Task<int> GetOrAddToCache(
-        string source,
-        int year,
-        int month,
-        Func<int, int, Task<int>> fetchMethod)
-    {
-        return await memoryCache.GetOrCreateAsync(
-            CacheKeys.GetMonthSummaryCacheKey(source, year, month),
-            async (cacheEntry) =>
-            {
-                if (DateTime.Today.Month == month && DateTime.Today.Year == year)
-                {
-                    cacheEntry.SlidingExpiration = TimeSpan.FromHours(12);
-                }
-                return await fetchMethod(year, month);
-            });
-    }
-}

src/Solar.Api/Solar.Api.csproj

@@ -1,19 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk.Web">
-
-  <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
-    <Nullable>enable</Nullable>
-    <ImplicitUsings>enable</ImplicitUsings>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.0">
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-      <PrivateAssets>all</PrivateAssets>
-    </PackageReference>
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="8.0.0" />
-    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.5.0" />
-    <PackageReference Include="Swashbuckle.AspNetCore.Annotations" Version="6.5.0" />
-  </ItemGroup>
-
-</Project>

src/Solar.Api/appsettings.Development.json

@@ -1,11 +0,0 @@
-{
-  "ConnectionStrings": {
-    "Database": "Data Source=/home/tijmen/project/home-data-collection-tools/samples/solarpaneloutput.db"
-  },
-  "Logging": {
-    "LogLevel": {
-      "Default": "Information",
-      "Microsoft.AspNetCore": "Warning"
-    }
-  }
-}

src/Solar.Api/appsettings.json

@@ -1,12 +0,0 @@
-{
-  "ConnectionStrings": {
-    "Database": "Data Source=/home/tijmen/project/home-data-collection-tools/samples/solarpaneloutput.db"
-  },
-  "Logging": {
-    "LogLevel": {
-      "Default": "Information",
-      "Microsoft.AspNetCore": "Warning"
-    }
-  },
-  "AllowedHosts": "*"
-}

src/electricity-logger/database.cpp

@@ -1,5 +1,4 @@
 #include <electricity/logger/database.hpp>
-#include <exception>
 #include <iomanip>
 #include <spdlog/spdlog.h>
 #include <sstream>

src/electricity-logger/main.cpp

@@ -4,12 +4,32 @@
 #include <electricity/logger/serialport.hpp>
 #include <exception>
 #include <fcntl.h>
+#include <iostream>
 #include <optional>
 #include <spdlog/spdlog.h>
 #include <stdexcept>
 #include <string>
 
-std::optional<cxxopts::ParseResult> ExtractArgs(int argc, char ** argv)
+struct CommandlineParameters
+{
+    CommandlineParameters(std::string const & serialDevicePath, std::string const & databaseConnectionString)
+     : DeviceType(serialDevicePath), DatabaseConnectionString(databaseConnectionString) { };
+
+    std::string DeviceType;
+    std::string DatabaseConnectionString;
+};
+
+std::optional<std::string> TryGetStringArgument(cxxopts::ParseResult const & parseResult, std::string const & name)
+{
+    if(!parseResult.contains(name))
+    {
+        return {};
+    }
+
+    return parseResult[name].as_optional<std::string>();
+}
+
+std::optional<CommandlineParameters> TryGetCommandlineArguments(int argc, char ** argv)
 {
     cxxopts::Options options(
         "electricity-logger",
@@ -23,22 +43,25 @@ std::optional<cxxopts::ParseResult> ExtractArgs(int argc, char ** argv)
         "Path to the sqlite3 database file",
         cxxopts::value<std::string>());
 
-    if(argc == 1)
-    {
-        std::cout << options.help() << std::endl;
-        return {};
-    }
-
     try
     {
-        auto const parsed = options.parse(argc, argv);
+        auto const parseResult = options.parse(argc, argv);
-        return parsed;
+        auto const serialDevicePath = TryGetStringArgument(parseResult, "serial-device");
+        auto const databaseConnectionString = TryGetStringArgument(parseResult, "connection-string");
+
+        if(serialDevicePath.has_value() && databaseConnectionString.has_value())
+        {
+            return CommandlineParameters(serialDevicePath.value(), databaseConnectionString.value());
+        }
     }
-    catch(cxxopts::OptionException const & e)
+    catch(cxxopts::exceptions::exception const & e)
     {
         spdlog::error(e.what());
         return {};
     }
+
+    std::cout << options.help() << std::endl;
+    return {};
 }
 
 DSMR::Data ReadData(std::string const & devicePath)
@@ -99,18 +122,15 @@ DSMR::Data ReadData(std::string const & devicePath)
 
 int main(int argc, char ** argv)
 {
-    auto const maybeArgs = ExtractArgs(argc, argv);
+    auto const parameters = TryGetCommandlineArguments(argc, argv);
-    if(!maybeArgs.has_value())
+    if(!parameters.has_value())
     {
         return 1;
     }
 
-    auto const & args = maybeArgs.value();
+    auto const data = ReadData(parameters->DeviceType);
 
-    auto const data = ReadData(args["serial-device"].as<std::string>());
+    Database db(parameters->DatabaseConnectionString);
-
-    auto const connectionStringValue = args["connection-string"].as<std::string>();
-    Database db(connectionStringValue);
     db.Insert(data, std::time(nullptr));
 
     return 0;

src/electricity_api/Cargo.lock

@@ -0,0 +1,842 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
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+]
+
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+
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+ "addr2line",
+ "cfg-if",
+ "libc",
+ "miniz_oxide",
+ "object",
+ "rustc-demangle",
+ "windows-targets",
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+
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+ "libc",
+]
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+ "block-buffer",
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+ "tokio",
+ "warp",
+]
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src/electricity_api/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "electricity_api"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+chrono = { workspace = true }
+clap = { workspace = true, features = ["derive"] }
+colog = { workspace = true }
+log = { workspace = true }
+rusqlite = { workspace = true, features = ["bundled"] }
+serde = { workspace = true, features = ["derive"] }
+serde_json = { workspace = true }
+shared_api_lib = { path = "../shared_api_lib" }
+tokio = { workspace = true, features = ["full"] }
+warp = { workspace = true, features = ["server"] }

src/electricity_api/src/database.rs

@@ -0,0 +1,331 @@
+use shared_api_lib::year_month::YearMonth;
+
+pub fn get_day_power_entities(date: &chrono::NaiveDate, database_path: &str) -> Vec<LogEntity> {
+    let mut items = Vec::new();
+
+    let maybe_connection = rusqlite::Connection::open(database_path);
+    if maybe_connection.is_err() {
+        log::error!(
+            "Failed to open database connection to {} with error {}",
+            database_path,
+            maybe_connection.unwrap_err()
+        );
+        return items;
+    }
+
+    let connection = maybe_connection.unwrap();
+    let maybe_statement = connection.prepare(
+        "SELECT 
+                \"Date\",
+                \"TimeUtc\",
+                \"CurrentPowerUsage\",
+                \"TotalPowerConsumptionDay\",
+                \"TotalPowerConsumptionNight\",
+                \"CurrentPowerReturn\",
+                \"TotalPowerReturnDay\",
+                \"TotalPowerReturnNight\",
+                \"DayTarifEnabled\",
+                \"GasConsumptionInCubicMeters\"
+            FROM \"ElectricityLog\"
+            WHERE \"Date\" = :date
+            ORDER BY \"Date\", \"TimeUtc\";",
+    );
+    if maybe_statement.is_err() {
+        log::error!(
+            "Failed to prepate database statement with error {}",
+            maybe_statement.unwrap_err()
+        );
+        return items;
+    }
+
+    let formatted_date = format!("{}", date);
+    log::info!("Fetching day power data for date {}", formatted_date);
+    let mut statement = maybe_statement.unwrap();
+    let maybe_row_iterator = statement.query_map(&[(":date", &formatted_date)], |row| {
+        Ok(LogEntity {
+            // date: row.get(0)?,
+            time_utc: row.get(1)?,
+            current_power_usage: row.get(2)?,
+            total_power_consumption_day: row.get(3)?,
+            total_power_consumption_night: row.get(4)?,
+            // current_power_return: row.get(5)?,
+            total_power_return_day: row.get(6)?,
+            total_power_return_night: row.get(7)?,
+            // day_tarif_enabled: row.get(8)?,
+            gas_consumption_in_cubic_meters: row.get(9)?,
+        })
+    });
+
+    match maybe_row_iterator {
+        Ok(iterator) => {
+            for row in iterator {
+                match row {
+                    Ok(entity) => {
+                        items.push(entity);
+                    }
+                    Err(error) => log::error!(
+                        "Failed to interpret row from SQL query with error {}",
+                        error
+                    ),
+                }
+            }
+        }
+        Err(error) => {
+            log::error!(
+                "Failed to execute day power data SQL query with error {}",
+                error
+            );
+        }
+    }
+
+    items
+}
+
+pub struct LogEntity {
+    // pub date: String,
+    pub time_utc: String,
+    pub current_power_usage: f64,
+    pub total_power_consumption_day: f64,
+    pub total_power_consumption_night: f64,
+    // pub current_power_return: f64,
+    pub total_power_return_day: f64,
+    pub total_power_return_night: f64,
+    // pub day_tarif_enabled: u8,
+    pub gas_consumption_in_cubic_meters: f64,
+}
+
+pub fn get_day_power_summaries(
+    start: &chrono::NaiveDate,
+    stop: &chrono::NaiveDate,
+    database_path: &str,
+) -> Vec<LogDateSummary> {
+    let mut items = Vec::new();
+
+    let maybe_connection = rusqlite::Connection::open(database_path);
+    if maybe_connection.is_err() {
+        log::error!(
+            "Failed to open database connection to {} with error {}",
+            database_path,
+            maybe_connection.unwrap_err()
+        );
+        return items;
+    }
+
+    let connection = maybe_connection.unwrap();
+    let maybe_statement = connection.prepare(
+        "WITH MaximumValuesPerDate AS (
+            SELECT \"Date\", MAX(\"TimeUtc\") AS \"TimeUtc\"
+            FROM \"ElectricityLog\"
+            WHERE
+                \"Date\" >= :start AND
+                \"Date\" <= :stop
+            GROUP BY \"Date\"
+        )
+        SELECT 
+            l.\"Date\",
+            \"TotalPowerConsumptionDay\",
+            \"TotalPowerConsumptionNight\",
+            \"TotalPowerReturnDay\",
+            \"TotalPowerReturnNight\",
+            \"GasConsumptionInCubicMeters\"
+        FROM \"ElectricityLog\" l
+        JOIN MaximumValuesPerDate m ON
+            m.\"Date\" = l.\"Date\" AND
+            m.\"TimeUtc\" = l.\"TimeUtc\"
+        ORDER BY l.\"Date\", l.\"TimeUtc\";",
+    );
+    if maybe_statement.is_err() {
+        log::error!(
+            "Failed to prepate database statement with error {}",
+            maybe_statement.unwrap_err()
+        );
+        return items;
+    }
+
+    let formatted_start = format!("{}", start);
+    let formatted_stop = format!("{}", stop);
+    log::info!(
+        "Fetching day power data for date range {} to {}",
+        formatted_start,
+        formatted_stop
+    );
+    let mut statement = maybe_statement.unwrap();
+    let maybe_row_iterator = statement.query_map(
+        &[(":start", &formatted_start), (":stop", &formatted_stop)],
+        |row| {
+            Ok(LogDateSummary {
+                date: row.get(0)?,
+                total_power_consumption_day: row.get(1)?,
+                total_power_consumption_night: row.get(2)?,
+                total_power_return_day: row.get(3)?,
+                total_power_return_night: row.get(4)?,
+                gas_consumption_in_cubic_meters: row.get(5)?,
+            })
+        },
+    );
+
+    match maybe_row_iterator {
+        Ok(iterator) => {
+            for row in iterator {
+                match row {
+                    Ok(entity) => {
+                        items.push(entity);
+                    }
+                    Err(error) => log::error!(
+                        "Failed to interpret row from SQL query with error {}",
+                        error
+                    ),
+                }
+            }
+        }
+        Err(error) => {
+            log::error!(
+                "Failed to execute day power data SQL query with error {}",
+                error
+            );
+        }
+    }
+
+    items
+}
+
+pub struct LogDateSummary {
+    pub date: String,
+    pub total_power_consumption_day: f64,
+    pub total_power_consumption_night: f64,
+    pub total_power_return_day: f64,
+    pub total_power_return_night: f64,
+    pub gas_consumption_in_cubic_meters: f64,
+}
+
+pub fn get_month_power_summaries(
+    start: &YearMonth,
+    stop: &YearMonth,
+    database_path: &str,
+) -> Vec<LogMonthSummary> {
+    let mut items = Vec::new();
+
+    let maybe_connection = rusqlite::Connection::open(database_path);
+    if maybe_connection.is_err() {
+        log::error!(
+            "Failed to open database connection to {} with error {}",
+            database_path,
+            maybe_connection.unwrap_err()
+        );
+        return items;
+    }
+
+    let connection = maybe_connection.unwrap();
+    let maybe_statement = connection.prepare(
+        "SELECT
+            STRFTIME('%Y-%m', \"Date\") AS YearMonth,
+            MAX(TotalPowerConsumptionDay),
+            MIN(TotalPowerConsumptionDay),
+            MAX(TotalPowerConsumptionNight),
+            MIN(TotalPowerConsumptionNight),
+            MAX(TotalPowerReturnDay),
+            MIN(TotalPowerReturnDay),
+            MAX(TotalPowerReturnNight),
+            MIN(TotalPowerReturnNight),
+            MAX(GasConsumptionInCubicMeters),
+            MIN(GasConsumptionInCubicMeters)
+        FROM \"ElectricityLog\"
+        WHERE \"Date\" >= :start_date AND \"Date\" <= :stop_date
+        GROUP BY YearMonth
+        ORDER BY YearMonth;",
+    );
+    if maybe_statement.is_err() {
+        log::error!(
+            "Failed to prepate database statement with error {}",
+            maybe_statement.unwrap_err()
+        );
+        return items;
+    }
+
+    let formatted_start = format!("{}-01", start);
+    let formatted_stop = format!("{}-31", stop);
+    log::info!(
+        "Fetching month power data for date range {} to {}",
+        formatted_start,
+        formatted_stop
+    );
+    let mut statement = maybe_statement.unwrap();
+    let maybe_row_iterator = statement.query_map(
+        &[
+            (":start_date", &formatted_start),
+            (":stop_date", &formatted_stop),
+        ],
+        |row| {
+            Ok(LogMonthSummaryEntity {
+                year_month: row.get(0)?,
+                total_power_consumption_day: row.get::<usize, f64>(1)?
+                    - row.get::<usize, f64>(2)?,
+                total_power_consumption_night: row.get::<usize, f64>(3)?
+                    - row.get::<usize, f64>(4)?,
+                total_power_return_day: row.get::<usize, f64>(5)? - row.get::<usize, f64>(6)?,
+                total_power_return_night: row.get::<usize, f64>(7)? - row.get::<usize, f64>(8)?,
+                gas_consumption_in_cubic_meters: row.get::<usize, f64>(9)?
+                    - row.get::<usize, f64>(10)?,
+            })
+        },
+    );
+
+    match maybe_row_iterator {
+        Ok(iterator) => {
+            for row in iterator {
+                match row {
+                    Ok(entity) => {
+                        if let Some(year_month) = YearMonth::try_parse(&entity.year_month) {
+                            items.push(LogMonthSummary {
+                                year: year_month.year,
+                                month: year_month.month,
+                                total_power_consumption_day: entity.total_power_consumption_day,
+                                total_power_consumption_night: entity.total_power_consumption_night,
+                                total_power_return_day: entity.total_power_return_day,
+                                total_power_return_night: entity.total_power_return_night,
+                                gas_consumption_in_cubic_meters: entity
+                                    .gas_consumption_in_cubic_meters,
+                            });
+                        } else {
+                            log::error!(
+                                "Failed to parse year month {} from SQL row",
+                                entity.year_month
+                            );
+                        }
+                    }
+                    Err(error) => log::error!(
+                        "Failed to interpret row from SQL query with error {}",
+                        error
+                    ),
+                }
+            }
+        }
+        Err(error) => {
+            log::error!(
+                "Failed to execute month power data SQL query with error {}",
+                error
+            );
+        }
+    }
+
+    items
+}
+
+struct LogMonthSummaryEntity {
+    pub year_month: String,
+    pub total_power_consumption_day: f64,
+    pub total_power_consumption_night: f64,
+    pub total_power_return_day: f64,
+    pub total_power_return_night: f64,
+    pub gas_consumption_in_cubic_meters: f64,
+}
+
+pub struct LogMonthSummary {
+    pub year: i32,
+    pub month: u8,
+    pub total_power_consumption_day: f64,
+    pub total_power_consumption_night: f64,
+    pub total_power_return_day: f64,
+    pub total_power_return_night: f64,
+    pub gas_consumption_in_cubic_meters: f64,
+}

src/electricity_api/src/main.rs

@@ -0,0 +1,408 @@
+use clap::Parser;
+use std::collections::HashMap;
+use warp::Filter;
+use warp::http::Response;
+
+mod database;
+
+#[tokio::main]
+async fn main() {
+    let args = std::sync::Arc::new(CommandLineArgs::parse());
+
+    colog::init();
+    log::info!("Electricity API is starting up");
+
+    serve(&args).await;
+}
+
+#[derive(clap::Parser)]
+struct CommandLineArgs {
+    #[arg(long = "database-path")]
+    database_path: String,
+
+    #[arg(long = "listening-port")]
+    listening_port: u16,
+
+    #[arg(long = "http-header-name-to-validate")]
+    http_header_name_to_validate: String,
+
+    #[arg(long = "http-header-value-to-validate")]
+    http_header_value_to_validate: String,
+}
+
+async fn serve(configuration: &std::sync::Arc<CommandLineArgs>) {
+    let day = warp::get()
+        .and(warp::path("day"))
+        .and(warp::query::<HashMap<String, String>>())
+        .and(warp::header::headers_cloned())
+        .and(warp::any().map({
+            let configuration = configuration.clone();
+            move || configuration.clone()
+        }))
+        .map(
+            |query: HashMap<String, String>,
+             headers,
+             configuration: std::sync::Arc<CommandLineArgs>| {
+                if !has_required_header(
+                    &headers,
+                    &configuration.http_header_name_to_validate,
+                    &configuration.http_header_value_to_validate,
+                ) {
+                    log::info!("Access requested to /day with invalid header value");
+                    return Response::builder()
+                        .status(403)
+                        .body(String::from("Forbidden"));
+                }
+
+                match shared_api_lib::query_helpers::try_parse_query_date(query.get("date")) {
+                    Some(date) => {
+                        let json = get_day_power_json(&date, &configuration.database_path);
+                        return Response::builder()
+                            .header("Content-Type", "application/json")
+                            .body(json);
+                    }
+                    _ => Response::builder()
+                        .status(400)
+                        .body(String::from("Unsupported \"date\" param in query.")),
+                }
+            },
+        );
+
+    let days = warp::get()
+        .and(warp::path("days"))
+        .and(warp::query::<HashMap<String, String>>())
+        .and(warp::header::headers_cloned())
+        .and(warp::any().map({
+            let configuration = configuration.clone();
+            move || configuration.clone()
+        }))
+        .map(
+            |query: HashMap<String, String>,
+             headers,
+             configuration: std::sync::Arc<CommandLineArgs>| {
+                if !has_required_header(
+                    &headers,
+                    &configuration.http_header_name_to_validate,
+                    &configuration.http_header_value_to_validate,
+                ) {
+                    log::info!("Access requested to /days with invalid header value");
+                    return Response::builder()
+                        .status(403)
+                        .body(String::from("Forbidden"));
+                }
+
+                let maybe_start =
+                    shared_api_lib::query_helpers::try_parse_query_date(query.get("start"));
+                if maybe_start.is_none() {
+                    return Response::builder()
+                        .status(400)
+                        .body(String::from("Unsupported \"start\" param in query."));
+                }
+
+                let maybe_stop =
+                    shared_api_lib::query_helpers::try_parse_query_date(query.get("stop"));
+                if maybe_stop.is_none() {
+                    return Response::builder()
+                        .status(400)
+                        .body(String::from("Unsupported \"stop\" param in query."));
+                }
+
+                let start = maybe_start.unwrap();
+                let stop = maybe_stop.unwrap();
+                if start > stop {
+                    return Response::builder().status(400).body(String::from(
+                        "Param \"start\" must be smaller than or equal to param \"stop\" in query.",
+                    ));
+                }
+
+                let maybe_day_before_start = start.checked_sub_days(chrono::Days::new(1));
+                if maybe_day_before_start.is_none() {
+                    return Response::builder()
+                        .status(400)
+                        .body(String::from("Param \"start\" in query is too early."));
+                }
+
+                let day_before_start = maybe_day_before_start.unwrap();
+                let json =
+                    get_days_power_json(&day_before_start, &stop, &configuration.database_path);
+                return Response::builder()
+                    .header("Content-Type", "application/json")
+                    .body(json);
+            },
+        );
+
+    let months = warp::get()
+        .and(warp::path("months"))
+        .and(warp::query::<HashMap<String, String>>())
+        .and(warp::header::headers_cloned())
+        .and(warp::any().map({
+            let configuration = configuration.clone();
+            move || configuration.clone()
+        }))
+        .map(
+            |query: HashMap<String, String>,
+             headers,
+             configuration: std::sync::Arc<CommandLineArgs>| {
+                if !has_required_header(
+                    &headers,
+                    &configuration.http_header_name_to_validate,
+                    &configuration.http_header_value_to_validate,
+                ) {
+                    log::info!("Access requested to /months with invalid header value");
+                    return Response::builder()
+                        .status(403)
+                        .body(String::from("Forbidden"));
+                }
+
+                let maybe_start =
+                    shared_api_lib::query_helpers::try_parse_query_month_year(query.get("start"));
+                if maybe_start.is_none() {
+                    return Response::builder()
+                        .status(400)
+                        .body(String::from("Unsupported \"start\" param in query."));
+                }
+
+                let maybe_stop =
+                    shared_api_lib::query_helpers::try_parse_query_month_year(query.get("stop"));
+                if maybe_stop.is_none() {
+                    return Response::builder()
+                        .status(400)
+                        .body(String::from("Unsupported \"stop\" param in query."));
+                }
+
+                let start = maybe_start.unwrap();
+                let stop = maybe_stop.unwrap();
+                if start > stop {
+                    return Response::builder().status(400).body(String::from(
+                        "Param \"start\" must be smaller than or equal to param \"stop\" in query.",
+                    ));
+                }
+
+                let json = get_months_power_json(&start, &stop, &configuration.database_path);
+                return Response::builder()
+                    .header("Content-Type", "application/json")
+                    .body(json);
+            },
+        );
+
+    warp::serve(day.or(days).or(months))
+        .run(([127, 0, 0, 1], configuration.listening_port))
+        .await;
+}
+
+fn has_required_header(
+    headers: &warp::http::HeaderMap,
+    expected_header_name: &str,
+    allowed_header_values: &str,
+) -> bool {
+    match headers.iter().find(|h| *h.0 == *expected_header_name) {
+        Some((_, header_value)) => {
+            for value in allowed_header_values.split(',') {
+                if *header_value == *value {
+                    return true;
+                }
+            }
+            return false;
+        }
+        _ => return false,
+    }
+}
+
+fn get_day_power_json(date: &chrono::NaiveDate, database_path: &str) -> String {
+    let entities = database::get_day_power_entities(date, database_path);
+    let mut models = Vec::new();
+
+    for entity in entities {
+        let formatted_date_time = format!("{}T{}Z", date, entity.time_utc);
+        match chrono::DateTime::parse_from_rfc3339(&formatted_date_time) {
+            Ok(date_time) => {
+                models.push(DayResponseItem {
+                    date_time: date_time.timestamp(),
+                    current_power_usage: entity.current_power_usage,
+                    total_power_use: entity.total_power_consumption_day
+                        + entity.total_power_consumption_night,
+                    total_power_return: entity.total_power_return_day
+                        + entity.total_power_return_night,
+                    total_gas_use: entity.gas_consumption_in_cubic_meters,
+                });
+            }
+            Err(error) => {
+                log::error!(
+                    "Failed to construct date time from {} with error {}",
+                    formatted_date_time,
+                    error
+                );
+            }
+        }
+    }
+
+    match serde_json::to_string(&models) {
+        Ok(json) => json,
+        Err(error) => {
+            log::error!(
+                "Failed to format JSON data for date {} with error {}",
+                date,
+                error
+            );
+            return String::from("[]");
+        }
+    }
+}
+
+#[derive(serde::Serialize)]
+#[serde(rename_all = "camelCase")]
+struct DayResponseItem {
+    date_time: i64,
+    current_power_usage: f64,
+    total_power_use: f64,
+    total_power_return: f64,
+    total_gas_use: f64,
+}
+
+fn get_days_power_json(
+    day_before_start: &chrono::NaiveDate,
+    stop: &chrono::NaiveDate,
+    database_path: &str,
+) -> String {
+    let summaries = database::get_day_power_summaries(&day_before_start, &stop, database_path);
+    let mut models = Vec::new();
+
+    for summary in summaries.iter() {
+        models.push(DaysResponseItem {
+            date: summary.date.clone(),
+            total_power_use: summary.total_power_consumption_day
+                + summary.total_power_consumption_night,
+            total_power_return: summary.total_power_return_day + summary.total_power_return_night,
+            total_gas_use: summary.gas_consumption_in_cubic_meters,
+        });
+    }
+
+    // Is there a more elegant way to do this? The problem is that the values
+    // are cumulative and the frontend wants actual delta's for each day instead
+    let mut total_power_use_to_subtract: f64 = 0.0;
+    let mut total_power_return_to_subtract: f64 = 0.0;
+    let mut total_gas_use_to_subtract: f64 = 0.0;
+    for model in models.iter_mut() {
+        let next_total_power_use_to_subtract = model.total_power_use;
+        let next_total_power_return_to_subtract = model.total_power_return;
+        let next_total_gas_use_to_subtract = model.total_gas_use;
+
+        model.total_power_use -= total_power_use_to_subtract;
+        model.total_power_return -= total_power_return_to_subtract;
+        model.total_gas_use -= total_gas_use_to_subtract;
+
+        total_power_use_to_subtract = next_total_power_use_to_subtract;
+        total_power_return_to_subtract = next_total_power_return_to_subtract;
+        total_gas_use_to_subtract = next_total_gas_use_to_subtract;
+    }
+
+    // Now fill any gaps for which the database had no results. This usually
+    // happens if future dates are requested.
+    let mut complete_models = Vec::new();
+    let mut current_date = day_before_start.clone();
+    loop {
+        let current_date_formatted = current_date.to_string();
+        match models.iter().find(|i| i.date == current_date_formatted) {
+            Some(existing_model) => complete_models.push(DaysResponseItem {
+                date: current_date_formatted,
+                total_power_use: existing_model.total_power_use,
+                total_power_return: existing_model.total_power_return,
+                total_gas_use: existing_model.total_gas_use,
+            }),
+            None => complete_models.push(DaysResponseItem {
+                date: current_date_formatted,
+                total_power_use: 0.0,
+                total_power_return: 0.0,
+                total_gas_use: 0.0,
+            }),
+        }
+
+        match current_date.checked_add_days(chrono::Days::new(1)) {
+            Some(next_date) => {
+                if next_date > *stop {
+                    break;
+                }
+                current_date = next_date
+            }
+            None => break,
+        }
+    }
+
+    let formatted_day_before_start = format!("{}", day_before_start);
+    if complete_models.len() > 0 && complete_models[0].date == formatted_day_before_start {
+        complete_models.remove(0);
+    }
+
+    match serde_json::to_string(&complete_models) {
+        Ok(json) => json,
+        Err(error) => {
+            log::error!(
+                "Failed to format JSON data for date range {} to {} with error {}",
+                day_before_start,
+                stop,
+                error
+            );
+            return String::from("[]");
+        }
+    }
+}
+
+#[derive(serde::Serialize)]
+#[serde(rename_all = "camelCase")]
+struct DaysResponseItem {
+    date: String, // yyyy-MM-dd
+    total_power_use: f64,
+    total_power_return: f64,
+    total_gas_use: f64,
+}
+
+fn get_months_power_json(
+    start: &shared_api_lib::year_month::YearMonth,
+    stop: &shared_api_lib::year_month::YearMonth,
+    database_path: &str,
+) -> String {
+    let summaries = database::get_month_power_summaries(&start, &stop, &database_path);
+    let mut response_model = MonthsResponse {
+        month_logs: Vec::new(),
+    };
+
+    for summary in summaries {
+        response_model.month_logs.push(MonthsResponseItem {
+            year: summary.year,
+            month: summary.month,
+            total_power_use: summary.total_power_consumption_day
+                + summary.total_power_consumption_night,
+            total_power_return: summary.total_power_return_day + summary.total_power_return_night,
+            total_gas_use: summary.gas_consumption_in_cubic_meters,
+        });
+    }
+
+    match serde_json::to_string(&response_model) {
+        Ok(json) => json,
+        Err(error) => {
+            log::error!(
+                "Failed to format JSON data for date range {} to {} with error {}",
+                start,
+                stop,
+                error
+            );
+            return String::from("[]");
+        }
+    }
+}
+
+#[derive(serde::Serialize)]
+#[serde(rename_all = "camelCase")]
+struct MonthsResponse {
+    month_logs: Vec<MonthsResponseItem>,
+}
+
+#[derive(serde::Serialize)]
+#[serde(rename_all = "camelCase")]
+struct MonthsResponseItem {
+    year: i32,
+    month: u8,
+    total_power_use: f64,
+    total_power_return: f64,
+    total_gas_use: f64,
+}

src/shared_api_lib/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "shared_api_lib"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+chrono = { workspace = true }
+log = { workspace = true }

src/shared_api_lib/src/lib.rs

@@ -0,0 +1,2 @@
+pub mod query_helpers;
+pub mod year_month;

src/shared_api_lib/src/query_helpers.rs

@@ -0,0 +1,23 @@
+use chrono::NaiveDate;
+
+use crate::year_month::YearMonth;
+
+pub fn try_parse_query_date(value: Option<&String>) -> Option<NaiveDate> {
+    match value {
+        Some(string_value) => match chrono::NaiveDate::parse_from_str(string_value, "%Y-%m-%d") {
+            Ok(date) => Some(date),
+            Err(error) => {
+                log::error!("Failed to parse date {} with error {}", string_value, error);
+                return None;
+            }
+        },
+        _ => None,
+    }
+}
+
+pub fn try_parse_query_month_year(value: Option<&String>) -> Option<YearMonth> {
+    match value {
+        Some(string_value) => YearMonth::try_parse(string_value),
+        _ => None,
+    }
+}

src/shared_api_lib/src/year_month.rs

@@ -0,0 +1,150 @@
+use chrono::Datelike;
+
+#[derive(Copy, Clone)]
+pub struct YearMonth {
+    pub year: i32,
+    pub month: u8,
+}
+
+impl YearMonth {
+    pub fn get_next_month(&self) -> YearMonth {
+        if self.month >= 12 {
+            return YearMonth {
+                year: self.year + 1,
+                month: 1,
+            };
+        }
+
+        return YearMonth {
+            year: self.year,
+            month: self.month + 1,
+        };
+    }
+
+    pub fn try_parse(string_value: &str) -> Option<YearMonth> {
+        let parts: std::vec::Vec<&str> = string_value.split('-').collect();
+        if parts.len() != 2 {
+            return None;
+        }
+
+        match (parts[0].parse::<i32>(), parts[1].parse::<u8>()) {
+            (Ok(year), Ok(month)) => {
+                if month < 1 || month > 12 {
+                    return None;
+                }
+
+                return Some(YearMonth {
+                    year: year,
+                    month: month,
+                });
+            }
+            _ => None,
+        }
+    }
+
+    pub fn today() -> YearMonth {
+        let now = chrono::prelude::Local::now();
+        return YearMonth {
+            year: now.year(),
+            month: u8::try_from(now.month()).unwrap(),
+        };
+    }
+}
+
+impl std::fmt::Display for YearMonth {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}-{:02}", self.year, self.month)
+    }
+}
+
+impl PartialEq for YearMonth {
+    fn eq(&self, other: &Self) -> bool {
+        self.year == other.year && self.month == other.month
+    }
+}
+
+impl PartialOrd for YearMonth {
+    fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
+        if self.year > other.year {
+            return Some(std::cmp::Ordering::Greater);
+        }
+
+        if self.year < other.year {
+            return Some(std::cmp::Ordering::Less);
+        }
+
+        if self.month > other.month {
+            return Some(std::cmp::Ordering::Greater);
+        }
+
+        if self.month < other.month {
+            return Some(std::cmp::Ordering::Less);
+        }
+
+        Some(std::cmp::Ordering::Equal)
+    }
+
+    fn lt(&self, other: &Self) -> bool {
+        self.partial_cmp(other)
+            .is_some_and(std::cmp::Ordering::is_lt)
+    }
+
+    fn le(&self, other: &Self) -> bool {
+        self.partial_cmp(other)
+            .is_some_and(std::cmp::Ordering::is_le)
+    }
+
+    fn gt(&self, other: &Self) -> bool {
+        self.partial_cmp(other)
+            .is_some_and(std::cmp::Ordering::is_gt)
+    }
+
+    fn ge(&self, other: &Self) -> bool {
+        self.partial_cmp(other)
+            .is_some_and(std::cmp::Ordering::is_ge)
+    }
+}
+
+// Bounds are inclusive
+pub struct YearMonthRange {
+    start: YearMonth,
+    current: YearMonth,
+    stop: YearMonth,
+}
+
+impl YearMonthRange {
+    // Bounds are inclusive
+    pub fn new(start: &YearMonth, stop: &YearMonth) -> Result<YearMonthRange, &'static str> {
+        if *start > *stop {
+            return Err("Start cannot be greater than stop");
+        }
+
+        return Ok(YearMonthRange {
+            start: start.clone(),
+            current: start.clone(),
+            stop: stop.clone(),
+        });
+    }
+
+    pub fn start(&self) -> YearMonth {
+        self.start.clone()
+    }
+
+    pub fn stop(&self) -> YearMonth {
+        self.stop.clone()
+    }
+}
+
+impl Iterator for YearMonthRange {
+    type Item = YearMonth;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        if self.current > self.stop {
+            None
+        } else {
+            let result = self.current.clone();
+            self.current = result.get_next_month();
+            Some(result)
+        }
+    }
+}

src/solar-logger/database.cpp

@@ -1,6 +1,4 @@
 #include <cmath>
-#include <cstdlib>
-#include <ctime>
 #include <iomanip>
 #include <solar/logger/database.hpp>
 #include <spdlog/spdlog.h>

src/solar-logger/main.cpp

@@ -1,12 +1,11 @@
 #include <cstdio>
 #include <cxxopts.hpp>
-#include <iomanip>
+#include <iostream>
 #include <optional>
 #include <solar/logger/database.hpp>
 #include <solar/logger/envoydata.hpp>
 #include <solar/logger/zeverdata.hpp>
 #include <spdlog/spdlog.h>
-#include <sstream>
 #include <string>
 
 namespace detail
@@ -22,7 +21,43 @@ namespace detail
     }
 }
 
-std::optional<cxxopts::ParseResult> ExtractArgs(int argc, char ** argv)
+struct CommandlineParameters
+{
+    CommandlineParameters(
+        std::string const & deviceType,
+        std::string const & deviceUrl,
+        unsigned const deviceFetchTimeOut,
+        std::string const & databaseConnectionString)
+     : DeviceType(deviceType), DeviceUrl(deviceUrl), DeviceFetchTimeOut(deviceFetchTimeOut),
+       DatabaseConnectionString(databaseConnectionString) { };
+
+    std::string DeviceType;
+    std::string DeviceUrl;
+    unsigned DeviceFetchTimeOut;
+    std::string DatabaseConnectionString;
+};
+
+std::optional<std::string> TryGetStringArgument(cxxopts::ParseResult const & parseResult, std::string const & name)
+{
+    if(!parseResult.contains(name))
+    {
+        return {};
+    }
+
+    return parseResult[name].as_optional<std::string>();
+}
+
+std::optional<unsigned> TryGetUnsignedArgument(cxxopts::ParseResult const & parseResult, std::string const & name)
+{
+    if(!parseResult.contains(name))
+    {
+        return {};
+    }
+
+    return parseResult[name].as_optional<unsigned>();
+}
+
+std::optional<CommandlineParameters> TryGetCommandlineArguments(int argc, char ** argv)
 {
     cxxopts::Options options(
         "solar-logger",
@@ -50,14 +85,30 @@ std::optional<cxxopts::ParseResult> ExtractArgs(int argc, char ** argv)
 
     try
     {
-        auto const parsed = options.parse(argc, argv);
+        auto const parseResult = options.parse(argc, argv);
-        return parsed;
+        auto const deviceType = TryGetStringArgument(parseResult, "type");
+        auto const deviceUrl = TryGetStringArgument(parseResult, "url");
+        auto const deviceFetchTimeOut = TryGetUnsignedArgument(parseResult, "timeout");
+        auto const databaseConnectionString = TryGetStringArgument(parseResult, "connection-string");
+
+        if(deviceType.has_value() && deviceUrl.has_value() && deviceFetchTimeOut.has_value()
+           && databaseConnectionString.has_value())
+        {
+            return CommandlineParameters(
+                deviceType.value(),
+                deviceUrl.value(),
+                deviceFetchTimeOut.value(),
+                databaseConnectionString.value());
+        }
     }
-    catch(cxxopts::OptionException const & e)
+    catch(cxxopts::exceptions::exception const & e)
     {
         spdlog::error(e.what());
         return {};
     }
+
+    std::cout << options.help() << std::endl;
+    return {};
 }
 
 std::optional<std::string> FetchDataFromURL(const std::string & url, const unsigned int timeout)
@@ -81,7 +132,10 @@ std::optional<std::string> FetchDataFromURL(const std::string & url, const unsig
     const auto result = curl_easy_perform(curl);
     if(result)
     {
-        spdlog::error("Failed to fetch data from URL {} with cURL error code {}", url.c_str(), result);
+        spdlog::error(
+            "Failed to fetch data from URL {} with cURL error code {}",
+            url.c_str(),
+            static_cast<int>(result));
         curl_easy_cleanup(curl);
         return {};
     }
@@ -95,21 +149,19 @@ std::optional<std::string> FetchDataFromURL(const std::string & url, const unsig
 
 int main(int argc, char ** argv)
 {
-    auto const maybeArgs = ExtractArgs(argc, argv);
+    auto const parameters = TryGetCommandlineArguments(argc, argv);
-    if(!maybeArgs.has_value())
+    if(!parameters.has_value())
     {
         return 1;
     }
 
-    auto const & args = maybeArgs.value();
+    Database db(parameters->DatabaseConnectionString);
-
-    Database db(args["connection-string"].as<std::string>());
     auto const now = std::time(nullptr);
-    auto const resourceType = args["type"].as<std::string>();
+    auto const resourceType = parameters->DeviceType;
 
     if(resourceType == "Zeverlution")
     {
-        auto const webResource = FetchDataFromURL(args["url"].as<std::string>(), args["timeout"].as<unsigned>());
+        auto const webResource = FetchDataFromURL(parameters->DeviceUrl, parameters->DeviceFetchTimeOut);
         if(!webResource.has_value())
         {
             return -1;
@@ -134,7 +186,7 @@ int main(int argc, char ** argv)
     }
     else if(resourceType == "Envoy")
     {
-        auto const webResource = FetchDataFromURL(args["url"].as<std::string>(), args["timeout"].as<unsigned>());
+        auto const webResource = FetchDataFromURL(parameters->DeviceUrl, parameters->DeviceFetchTimeOut);
         if(!webResource.has_value())
         {
             return -1;

src/solar_api/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "solar_api"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+chrono = { workspace = true }
+clap = { workspace = true, features = ["derive"] }
+colog = { workspace = true }
+log = { workspace = true }
+rusqlite = { workspace = true, features = ["bundled"] }
+serde = { workspace = true, features = ["derive"] }
+serde_json = { workspace = true }
+shared_api_lib = { path = "../shared_api_lib" }
+tokio = { workspace = true, features = ["full"] }
+warp = { workspace = true, features = ["server"] }

src/solar_api/src/database.rs

@@ -0,0 +1,596 @@
+use shared_api_lib::year_month::YearMonth;
+
+pub fn get_day_solar_entities(date: &chrono::NaiveDate, database_path: &str) -> DayEntities {
+    let mut result = DayEntities {
+        envoy_logs: Vec::new(),
+        zever_logs: Vec::new(),
+    };
+
+    let maybe_connection = rusqlite::Connection::open(database_path);
+    if maybe_connection.is_err() {
+        log::error!(
+            "Failed to open database connection to {} with error {}",
+            database_path,
+            maybe_connection.unwrap_err()
+        );
+        return result;
+    }
+
+    let connection = maybe_connection.unwrap();
+    get_day_solar_entities_envoy(&date, &connection, &mut result.envoy_logs);
+    get_day_solar_entities_zever(&date, &connection, &mut result.zever_logs);
+    return result;
+}
+
+fn get_day_solar_entities_envoy(
+    date: &chrono::NaiveDate,
+    connection: &rusqlite::Connection,
+    output: &mut Vec<EnvoyLogEntity>,
+) {
+    let maybe_statement = connection.prepare(
+        "SELECT 
+                \"TimeUtc\",
+                \"CurrentWatts\",
+                \"TotalWatts\"
+            FROM \"EnvoyLogs\"
+            WHERE \"Date\" = :date
+            ORDER BY \"TimeUtc\";",
+    );
+    if maybe_statement.is_err() {
+        log::error!(
+            "Failed to prepare envoy solar database statement with error {}",
+            maybe_statement.unwrap_err()
+        );
+        return;
+    }
+
+    let formatted_date = format!("{}", date);
+    log::info!("Fetching envoy solar day data for date {}", formatted_date);
+    let mut statement = maybe_statement.unwrap();
+    let maybe_row_iterator = statement.query_map(&[(":date", &formatted_date)], |row| {
+        Ok(EnvoyLogEntity {
+            time_utc: row.get(0)?,
+            current_watts: row.get(1)?,
+            total_watts: row.get(2)?,
+        })
+    });
+
+    match maybe_row_iterator {
+        Ok(iterator) => {
+            for row in iterator {
+                match row {
+                    Ok(entity) => {
+                        output.push(entity);
+                    }
+                    Err(error) => log::error!(
+                        "Failed to interpret envoy solar row from SQL query with error {}",
+                        error
+                    ),
+                }
+            }
+        }
+        Err(error) => {
+            log::error!(
+                "Failed to execute envoy solar data SQL query with error {}",
+                error
+            );
+        }
+    }
+
+    // Envoy logs have a total_watts column that is cumulative instead of
+    // resetting every day like Zever logs are
+    if output.len() > 0 {
+        let offset = output[0].total_watts;
+        output[0].total_watts = 0;
+        for entity in output.iter_mut().skip(1) {
+            entity.total_watts -= offset;
+        }
+    }
+}
+
+fn get_day_solar_entities_zever(
+    date: &chrono::NaiveDate,
+    connection: &rusqlite::Connection,
+    output: &mut Vec<ZeverLogEntity>,
+) {
+    let maybe_statement = connection.prepare(
+        "SELECT 
+                \"TimeUtc\",
+                \"CurrentWatts\",
+                \"TotalWatts\"
+            FROM \"ZeverLogs\"
+            WHERE \"Date\" = :date
+            ORDER BY \"TimeUtc\";",
+    );
+    if maybe_statement.is_err() {
+        log::error!(
+            "Failed to prepare database statement with error {}",
+            maybe_statement.unwrap_err()
+        );
+        return;
+    }
+
+    let formatted_date = format!("{}", date);
+    log::info!("Fetching zever solar day data for date {}", formatted_date);
+    let mut statement = maybe_statement.unwrap();
+    let maybe_row_iterator = statement.query_map(&[(":date", &formatted_date)], |row| {
+        Ok(ZeverLogEntity {
+            time_utc: row.get(0)?,
+            current_watts: row.get(1)?,
+            total_watts: row.get(2)?,
+        })
+    });
+
+    match maybe_row_iterator {
+        Ok(iterator) => {
+            for row in iterator {
+                match row {
+                    Ok(entity) => {
+                        output.push(entity);
+                    }
+                    Err(error) => log::error!(
+                        "Failed to interpret zever solar row from SQL query with error {}",
+                        error
+                    ),
+                }
+            }
+        }
+        Err(error) => {
+            log::error!(
+                "Failed to execute zever solar data SQL query with error {}",
+                error
+            );
+        }
+    }
+}
+
+pub struct EnvoyLogEntity {
+    pub time_utc: String,
+    pub current_watts: i32,
+    pub total_watts: i32,
+}
+
+pub struct ZeverLogEntity {
+    pub time_utc: String,
+    pub current_watts: i32,
+    pub total_watts: i32,
+}
+
+pub struct DayEntities {
+    pub envoy_logs: Vec<EnvoyLogEntity>,
+    pub zever_logs: Vec<ZeverLogEntity>,
+}
+
+pub fn get_day_solar_summaries(
+    start: &chrono::NaiveDate,
+    stop: &chrono::NaiveDate,
+    database_path: &str,
+) -> Vec<LogDateSummary> {
+    let mut result = Vec::new();
+
+    let mut current_date = *start;
+    loop {
+        result.push(LogDateSummary {
+            date: current_date.to_string(),
+            envoy_total_watts: 0,
+            zever_total_watts: 0,
+        });
+        match current_date.checked_add_days(chrono::Days::new(1)) {
+            Some(next_date) => {
+                if next_date > *stop {
+                    break;
+                }
+                current_date = next_date
+            }
+            None => break,
+        }
+    }
+
+    let maybe_connection = rusqlite::Connection::open(database_path);
+    if maybe_connection.is_err() {
+        log::error!(
+            "Failed to open database connection to {} with error {}",
+            database_path,
+            maybe_connection.unwrap_err()
+        );
+        return result;
+    }
+
+    let connection = maybe_connection.unwrap();
+    get_day_solar_summaries_envoy(&start, &stop, &connection, &mut result);
+    get_day_solar_summaries_zever(&start, &stop, &connection, &mut result);
+
+    return result;
+}
+
+fn get_day_solar_summaries_envoy(
+    start: &chrono::NaiveDate,
+    stop: &chrono::NaiveDate,
+    connection: &rusqlite::Connection,
+    output: &mut Vec<LogDateSummary>,
+) {
+    let maybe_statement = connection.prepare(
+        "SELECT \"Date\", MAX(\"TotalWatts\"), MIN(\"TotalWatts\")
+        FROM \"EnvoyLogs\"
+        WHERE \"Date\" >= :start_date AND \"Date\" <= :stop_date
+        GROUP BY \"Date\";",
+    );
+    if maybe_statement.is_err() {
+        log::error!(
+            "Failed to prepare envoy day summary database statement with error {}",
+            maybe_statement.unwrap_err()
+        );
+        return;
+    }
+
+    let formatted_start_date = format!("{}", start);
+    let formatted_stop_date = format!("{}", stop);
+    log::info!(
+        "Fetching envoy solar day summary data for date range {} to {}",
+        formatted_start_date,
+        formatted_stop_date
+    );
+    let mut statement = maybe_statement.unwrap();
+    let maybe_row_iterator = statement.query_map(
+        &[
+            (":start_date", &formatted_start_date),
+            (":stop_date", &formatted_stop_date),
+        ],
+        |row| {
+            Ok(LogDateSummary {
+                date: row.get(0)?,
+                envoy_total_watts: row.get::<usize, i32>(1)? - row.get::<usize, i32>(2)?,
+                zever_total_watts: 0,
+            })
+        },
+    );
+
+    match maybe_row_iterator {
+        Ok(iterator) => {
+            for row in iterator {
+                match row {
+                    Ok(entity) => match output.iter_mut().find(|e| e.date == entity.date) {
+                        Some(existing_output_element) => {
+                            existing_output_element.envoy_total_watts = entity.envoy_total_watts
+                        }
+                        _ => {
+                            log::error!(
+                                "Processed entity with non existing date {} in output of envoy solar summary data",
+                                entity.date
+                            );
+                            continue;
+                        }
+                    },
+                    Err(error) => log::error!(
+                        "Failed to interpret envoy solar summary row from SQL query with error {}",
+                        error
+                    ),
+                }
+            }
+        }
+        Err(error) => {
+            log::error!(
+                "Failed to execute envoy solar summary data SQL query with error {}",
+                error
+            );
+        }
+    }
+}
+
+fn get_day_solar_summaries_zever(
+    start: &chrono::NaiveDate,
+    stop: &chrono::NaiveDate,
+    connection: &rusqlite::Connection,
+    output: &mut Vec<LogDateSummary>,
+) {
+    let maybe_statement = connection.prepare(
+        "SELECT \"Date\", MAX(\"TotalWatts\")
+        FROM \"ZeverLogs\"
+        WHERE \"Date\" >= :start_date AND \"Date\" <= :stop_date
+        GROUP BY \"Date\";",
+    );
+    if maybe_statement.is_err() {
+        log::error!(
+            "Failed to prepare zever day summary database statement with error {}",
+            maybe_statement.unwrap_err()
+        );
+        return;
+    }
+
+    let formatted_start_date = format!("{}", start);
+    let formatted_stop_date = format!("{}", stop);
+    log::info!(
+        "Fetching zever solar day summary data for date range {} to {}",
+        formatted_start_date,
+        formatted_stop_date
+    );
+    let mut statement = maybe_statement.unwrap();
+    let maybe_row_iterator = statement.query_map(
+        &[
+            (":start_date", &formatted_start_date),
+            (":stop_date", &formatted_stop_date),
+        ],
+        |row| {
+            Ok(LogDateSummary {
+                date: row.get(0)?,
+                envoy_total_watts: 0,
+                zever_total_watts: row.get(1)?,
+            })
+        },
+    );
+
+    match maybe_row_iterator {
+        Ok(iterator) => {
+            for row in iterator {
+                match row {
+                    Ok(entity) => match output.iter_mut().find(|e| e.date == entity.date) {
+                        Some(existing_output_element) => {
+                            existing_output_element.zever_total_watts = entity.zever_total_watts
+                        }
+                        _ => {
+                            log::error!(
+                                "Processed entity with non existing date {} in output of zever solar summary data",
+                                entity.date
+                            );
+                            continue;
+                        }
+                    },
+                    Err(error) => log::error!(
+                        "Failed to interpret zever solar summary row from SQL query with error {}",
+                        error
+                    ),
+                }
+            }
+        }
+        Err(error) => {
+            log::error!(
+                "Failed to execute zever solar summary data SQL query with error {}",
+                error
+            );
+        }
+    }
+}
+
+pub struct LogDateSummary {
+    pub date: String,
+    pub envoy_total_watts: i32,
+    pub zever_total_watts: i32,
+}
+
+pub fn get_month_solar_summaries(
+    start: &YearMonth,
+    stop: &YearMonth,
+    database_path: &str,
+) -> Vec<LogYearMonthSummary> {
+    let mut result = Vec::new();
+    let mut current_year_month = *start;
+    loop {
+        result.push(LogYearMonthSummary {
+            year: current_year_month.year,
+            month: current_year_month.month,
+            envoy_total_watts: 0,
+            zever_total_watts: 0,
+        });
+
+        current_year_month = current_year_month.get_next_month();
+        if current_year_month > *stop {
+            break;
+        }
+    }
+
+    let maybe_connection = rusqlite::Connection::open(database_path);
+    if maybe_connection.is_err() {
+        log::error!(
+            "Failed to open database connection to {} with error {}",
+            database_path,
+            maybe_connection.unwrap_err()
+        );
+        return result;
+    }
+
+    let connection = maybe_connection.unwrap();
+    get_month_solar_summaries_envoy(&start, &stop, &connection, &mut result);
+    get_month_solar_summaries_zever(&start, &stop, &connection, &mut result);
+
+    result
+}
+
+fn get_month_solar_summaries_envoy(
+    start: &YearMonth,
+    stop: &YearMonth,
+    connection: &rusqlite::Connection,
+    output: &mut Vec<LogYearMonthSummary>,
+) {
+    let formatted_start_date = format!("{}-01", start);
+    let formatted_stop_date = format!("{}-31", stop);
+    log::info!(
+        "Fetching envoy solar month summary data for date range {} to {}",
+        formatted_start_date,
+        formatted_stop_date
+    );
+
+    let mut statement = match connection.prepare(
+        "SELECT
+            STRFTIME('%Y-%m', \"Date\") AS YearMonth,
+            MAX(TotalWatts),
+            MIN(TotalWatts)
+        FROM EnvoyLogs
+        WHERE \"Date\" >= :start_date AND \"Date\" <= :stop_date
+        GROUP BY YearMonth
+        ORDER BY YearMonth;",
+    ) {
+        Ok(s) => s,
+        Err(e) => {
+            log::error!(
+                "Failed to prepare envoy month summary database statement with error {}",
+                e
+            );
+            return;
+        }
+    };
+
+    let rows = match statement.query_map(
+        &[
+            (":start_date", &formatted_start_date),
+            (":stop_date", &formatted_stop_date),
+        ],
+        |row| {
+            Ok(LogYearMonthSummaryEntity {
+                year_month: row.get(0)?,
+                total_watts: row.get::<usize, i32>(1)? - row.get::<usize, i32>(2)?,
+            })
+        },
+    ) {
+        Ok(it) => it,
+        Err(e) => {
+            log::error!(
+                "Failed to execute envoy solar month summary data SQL query with error {}",
+                e
+            );
+            return;
+        }
+    };
+
+    for row in rows {
+        let entity = match row {
+            Ok(e) => e,
+            Err(e) => {
+                log::error!(
+                    "Failed to interpret envoy month solar summary row from SQL query with error {}",
+                    e
+                );
+                continue;
+            }
+        };
+
+        let Some(entity_year_month) = YearMonth::try_parse(&entity.year_month) else {
+            log::error!(
+                "Processed entity with invalid year month {} in output of envoy solar month summary data",
+                entity.year_month
+            );
+            continue;
+        };
+
+        let Some(existing_output_element) = output
+            .iter_mut()
+            .find(|e| e.year == entity_year_month.year && e.month == entity_year_month.month)
+        else {
+            log::error!(
+                "Processed entity with non existing year month {} in output of envoy solar month summary data",
+                entity.year_month
+            );
+            continue;
+        };
+
+        existing_output_element.envoy_total_watts = entity.total_watts;
+    }
+}
+
+fn get_month_solar_summaries_zever(
+    start: &YearMonth,
+    stop: &YearMonth,
+    connection: &rusqlite::Connection,
+    output: &mut Vec<LogYearMonthSummary>,
+) {
+    let formatted_start_date = format!("{}-01", start);
+    let formatted_stop_date = format!("{}-31", stop);
+    log::info!(
+        "Fetching zever solar month summary data for date range {} to {}",
+        formatted_start_date,
+        formatted_stop_date
+    );
+
+    let mut statement = match connection.prepare(
+        "WITH MaximumValuesPerDate AS (
+            SELECT \"Date\", MAX(\"TotalWatts\") AS \"TotalWatts\"
+            FROM \"ZeverLogs\"
+            WHERE
+                \"Date\" >= :start_date AND
+                \"Date\" <= :stop_date
+            GROUP BY \"Date\"
+        )
+        SELECT
+            STRFTIME('%Y-%m', \"Date\") AS YearMonth,
+            SUM(TotalWatts)
+        FROM MaximumValuesPerDate
+        GROUP BY YearMonth
+        ORDER BY YearMonth;",
+    ) {
+        Ok(s) => s,
+        Err(e) => {
+            log::error!(
+                "Failed to prepare zever month summary database statement with error {}",
+                e
+            );
+            return;
+        }
+    };
+
+    let rows = match statement.query_map(
+        &[
+            (":start_date", &formatted_start_date),
+            (":stop_date", &formatted_stop_date),
+        ],
+        |row| {
+            Ok(LogYearMonthSummaryEntity {
+                year_month: row.get(0)?,
+                total_watts: row.get(1)?,
+            })
+        },
+    ) {
+        Ok(it) => it,
+        Err(e) => {
+            log::error!(
+                "Failed to execute zever solar month summary data SQL query with error {}",
+                e
+            );
+            return;
+        }
+    };
+
+    for row in rows {
+        let entity = match row {
+            Ok(e) => e,
+            Err(e) => {
+                log::error!(
+                    "Failed to interpret zever month solar summary row from SQL query with error {}",
+                    e
+                );
+                continue;
+            }
+        };
+
+        let Some(entity_year_month) = YearMonth::try_parse(&entity.year_month) else {
+            log::error!(
+                "Processed entity with invalid year month {} in output of zever solar month summary data",
+                entity.year_month
+            );
+            continue;
+        };
+
+        let Some(existing_output_element) = output
+            .iter_mut()
+            .find(|e| e.year == entity_year_month.year && e.month == entity_year_month.month)
+        else {
+            log::error!(
+                "Processed entity with non existing year month {} in output of zever solar month summary data",
+                entity.year_month
+            );
+            continue;
+        };
+
+        existing_output_element.zever_total_watts = entity.total_watts;
+    }
+}
+
+struct LogYearMonthSummaryEntity {
+    pub year_month: String,
+    pub total_watts: i32,
+}
+
+pub struct LogYearMonthSummary {
+    pub year: i32,
+    pub month: u8,
+    pub envoy_total_watts: i32,
+    pub zever_total_watts: i32,
+}

src/solar_api/src/main.rs

@@ -0,0 +1,528 @@
+use chrono;
+use clap::Parser;
+use shared_api_lib::year_month::{YearMonth, YearMonthRange};
+use std::collections::HashMap;
+use std::sync::RwLock;
+use warp::Filter;
+use warp::http::Response;
+
+mod database;
+
+#[tokio::main]
+async fn main() {
+    let args = std::sync::Arc::new(CommandLineArgs::parse());
+
+    colog::init();
+    log::info!("Solar API is starting up");
+
+    serve(&args).await;
+}
+
+#[derive(clap::Parser)]
+struct CommandLineArgs {
+    #[arg(long = "database-path")]
+    database_path: String,
+
+    #[arg(long = "listening-port")]
+    listening_port: u16,
+}
+
+async fn serve(configuration: &std::sync::Arc<CommandLineArgs>) {
+    let day = warp::get()
+        .and(warp::path("day"))
+        .and(warp::query::<HashMap<String, String>>())
+        .and(warp::any().map({
+            let configuration = configuration.clone();
+            move || configuration.clone()
+        }))
+        .map(
+            |query: HashMap<String, String>, configuration: std::sync::Arc<CommandLineArgs>| {
+                match shared_api_lib::query_helpers::try_parse_query_date(query.get("date")) {
+                    Some(date) => {
+                        let json = get_day_solar_json(&date, &configuration.database_path);
+                        return Response::builder()
+                            .header("Content-Type", "application/json")
+                            .body(json);
+                    }
+                    _ => Response::builder()
+                        .status(400)
+                        .body(String::from("Unsupported \"date\" param in query.")),
+                }
+            },
+        );
+
+    let days = warp::get()
+        .and(warp::path("days"))
+        .and(warp::query::<HashMap<String, String>>())
+        .and(warp::any().map({
+            let configuration = configuration.clone();
+            move || configuration.clone()
+        }))
+        .map(
+            |query: HashMap<String, String>, configuration: std::sync::Arc<CommandLineArgs>| {
+                let maybe_start =
+                    shared_api_lib::query_helpers::try_parse_query_date(query.get("start"));
+                if maybe_start.is_none() {
+                    return Response::builder()
+                        .status(400)
+                        .body(String::from("Unsupported \"start\" param in query."));
+                }
+
+                let maybe_stop =
+                    shared_api_lib::query_helpers::try_parse_query_date(query.get("stop"));
+                if maybe_stop.is_none() {
+                    return Response::builder()
+                        .status(400)
+                        .body(String::from("Unsupported \"stop\" param in query."));
+                }
+
+                let start = maybe_start.unwrap();
+                let stop = maybe_stop.unwrap();
+                if start > stop {
+                    return Response::builder().status(400).body(String::from(
+                        "Param \"start\" must be smaller than or equal to param \"stop\" in query.",
+                    ));
+                }
+
+                let maybe_day_before_start = start.checked_sub_days(chrono::Days::new(1));
+                if maybe_day_before_start.is_none() {
+                    return Response::builder()
+                        .status(400)
+                        .body(String::from("Param \"start\" in query is too early."));
+                }
+
+                let day_before_start = maybe_day_before_start.unwrap();
+                let json =
+                    get_days_solar_json(&day_before_start, &stop, &configuration.database_path);
+                return Response::builder()
+                    .header("Content-Type", "application/json")
+                    .body(json);
+            },
+        );
+
+    let month_cache: std::sync::Arc<RwLock<Vec<CachedMonthsResponseItem>>> =
+        std::sync::Arc::new(RwLock::new(Vec::new()));
+    let months = warp::get()
+        .and(warp::path("months"))
+        .and(warp::query::<HashMap<String, String>>())
+        .and(warp::any().map({
+            let configuration = configuration.clone();
+            move || configuration.clone()
+        }))
+        .and(warp::any().map({
+            let month_cache = month_cache.clone();
+            move || month_cache.clone()
+        }))
+        .map(
+            |query: HashMap<String, String>,
+             configuration: std::sync::Arc<CommandLineArgs>,
+             month_cache| {
+                let maybe_start =
+                    shared_api_lib::query_helpers::try_parse_query_month_year(query.get("start"));
+                if maybe_start.is_none() {
+                    return Response::builder()
+                        .status(400)
+                        .body(String::from("Unsupported \"start\" param in query."));
+                }
+
+                let maybe_stop =
+                    shared_api_lib::query_helpers::try_parse_query_month_year(query.get("stop"));
+                if maybe_stop.is_none() {
+                    return Response::builder()
+                        .status(400)
+                        .body(String::from("Unsupported \"stop\" param in query."));
+                }
+
+                let start = maybe_start.unwrap();
+                let stop = maybe_stop.unwrap();
+                if start > stop {
+                    return Response::builder().status(400).body(String::from(
+                        "Param \"start\" must be smaller than or equal to param \"stop\" in query.",
+                    ));
+                }
+
+                let json =
+                    get_months_solar_json(&start, &stop, &configuration.database_path, month_cache);
+                return Response::builder()
+                    .header("Content-Type", "application/json")
+                    .body(json);
+            },
+        );
+
+    warp::serve(day.or(days).or(months))
+        .run(([127, 0, 0, 1], configuration.listening_port))
+        .await;
+}
+
+fn get_day_solar_json(date: &chrono::NaiveDate, database_path: &str) -> String {
+    let entities = database::get_day_solar_entities(date, database_path);
+    let mut response_model = DayResponse {
+        envoy_logs: Vec::new(),
+        zever_logs: Vec::new(),
+    };
+
+    for entity in entities.envoy_logs {
+        response_model.envoy_logs.push(DayResponseLogItem {
+            time_utc: entity.time_utc,
+            current_watts: entity.current_watts,
+            total_watts: entity.total_watts,
+        });
+    }
+
+    for entity in entities.zever_logs {
+        response_model.zever_logs.push(DayResponseLogItem {
+            time_utc: entity.time_utc,
+            current_watts: entity.current_watts,
+            total_watts: entity.total_watts,
+        });
+    }
+
+    match serde_json::to_string(&response_model) {
+        Ok(json) => json,
+        Err(error) => {
+            log::error!(
+                "Failed to format JSON data for date {} with error {}",
+                date,
+                error
+            );
+            return String::from("[]");
+        }
+    }
+}
+
+#[derive(serde::Serialize)]
+#[serde(rename_all = "camelCase")]
+struct DayResponse {
+    envoy_logs: Vec<DayResponseLogItem>,
+    zever_logs: Vec<DayResponseLogItem>,
+}
+
+#[derive(serde::Serialize)]
+#[serde(rename_all = "camelCase")]
+struct DayResponseLogItem {
+    time_utc: String, // HH:mm:ss
+    current_watts: i32,
+    total_watts: i32,
+}
+
+fn get_days_solar_json(
+    day_before_start: &chrono::NaiveDate,
+    stop: &chrono::NaiveDate,
+    database_path: &str,
+) -> String {
+    let summaries = database::get_day_solar_summaries(&day_before_start, &stop, database_path);
+    let mut response_model = DaysResponse {
+        day_logs: Vec::new(),
+    };
+
+    for summary in summaries {
+        response_model.day_logs.push(DaysResponseItem {
+            date: summary.date.clone(),
+            envoy_total_watts: summary.envoy_total_watts,
+            zever_total_watts: summary.zever_total_watts,
+        });
+    }
+
+    match serde_json::to_string(&response_model) {
+        Ok(json) => json,
+        Err(error) => {
+            log::error!(
+                "Failed to format JSON data for date range {} to {} with error {}",
+                day_before_start,
+                stop,
+                error
+            );
+            return String::from("[]");
+        }
+    }
+}
+
+#[derive(serde::Serialize)]
+#[serde(rename_all = "camelCase")]
+struct DaysResponse {
+    day_logs: Vec<DaysResponseItem>,
+}
+
+#[derive(serde::Serialize)]
+#[serde(rename_all = "camelCase")]
+struct DaysResponseItem {
+    date: String, // yyyy-MM-dd
+    envoy_total_watts: i32,
+    zever_total_watts: i32,
+}
+
+fn get_months_solar_json(
+    start: &YearMonth,
+    stop: &YearMonth,
+    database_path: &str,
+    month_cache: std::sync::Arc<RwLock<Vec<CachedMonthsResponseItem>>>,
+) -> String {
+    let mut response_model = MonthsResponse {
+        month_logs: YearMonthRange::new(start, stop)
+            .unwrap()
+            .map(|ym| MonthsResponseItem {
+                year: ym.year,
+                month: ym.month,
+                envoy_total_watts: 0,
+                zever_total_watts: 0,
+            })
+            .collect(),
+    };
+
+    let cached_months = get_cached_months(&start, &stop, &month_cache);
+    let mut missing_months_from_cache;
+    if cached_months.len() > 0 {
+        missing_months_from_cache = Vec::new();
+        let mut matching_cached_month_index = 0;
+        for response_month in response_model.month_logs.iter_mut() {
+            if matching_cached_month_index < cached_months.len() {
+                let cached_month = &cached_months[matching_cached_month_index];
+                if response_month.year == cached_month.year
+                    && response_month.month == cached_month.month
+                {
+                    response_month.envoy_total_watts = cached_month.envoy_total_watts;
+                    response_month.zever_total_watts = cached_month.zever_total_watts;
+
+                    matching_cached_month_index += 1;
+                    continue;
+                }
+            }
+
+            missing_months_from_cache.push(YearMonth {
+                year: response_month.year,
+                month: response_month.month,
+            });
+        }
+    } else {
+        missing_months_from_cache = response_model
+            .month_logs
+            .iter()
+            .map(|i| YearMonth {
+                year: i.year,
+                month: i.month,
+            })
+            .collect();
+    }
+
+    if missing_months_from_cache.len() > 0 {
+        let missing_ranges = compact_missing_months_to_ranges(&missing_months_from_cache);
+        for range in missing_ranges {
+            let range_start = range.start();
+            let database_months =
+                get_month_summary_range_from_database(&range_start, &range.stop(), &database_path);
+
+            let mut response_item_index = response_model
+                .month_logs
+                .iter()
+                .enumerate()
+                .find_map(|(index, item)| {
+                    if item.year == range_start.year && item.month == range_start.month {
+                        return Some(index);
+                    }
+
+                    return None;
+                })
+                .unwrap();
+            for database_month in database_months.iter() {
+                let mut response_month = &mut response_model.month_logs[response_item_index];
+                // Database may return only partial results, i.e. not all dates
+                // for the range may be returned. Hence we need to check if the
+                // database result is for the same year month.
+                while database_month.year != response_month.year
+                    || database_month.month != response_month.month
+                {
+                    response_item_index += 1;
+                    response_month = &mut response_model.month_logs[response_item_index];
+                }
+
+                response_month.envoy_total_watts = database_month.envoy_total_watts;
+                response_month.zever_total_watts = database_month.zever_total_watts;
+                response_item_index += 1;
+            }
+
+            insert_missing_months_in_month_cache(&database_months, &month_cache);
+        }
+    }
+
+    match serde_json::to_string(&response_model) {
+        Ok(json) => json,
+        Err(error) => {
+            log::error!(
+                "Failed to format JSON data for date range {} to {} with error {}",
+                start,
+                stop,
+                error
+            );
+            return String::from("[]");
+        }
+    }
+}
+
+fn get_month_summary_range_from_database(
+    start: &YearMonth,
+    stop: &YearMonth,
+    database_path: &str,
+) -> Vec<MonthsResponseItem> {
+    let mut results = Vec::new();
+    let summaries = database::get_month_solar_summaries(&start, &stop, &database_path);
+    for summary in summaries.iter() {
+        results.push(MonthsResponseItem {
+            year: summary.year,
+            month: summary.month,
+            envoy_total_watts: summary.envoy_total_watts,
+            zever_total_watts: summary.zever_total_watts,
+        });
+    }
+
+    return results;
+}
+
+fn get_cached_months(
+    start: &YearMonth,
+    stop: &YearMonth,
+    month_cache: &std::sync::Arc<RwLock<Vec<CachedMonthsResponseItem>>>,
+) -> Vec<MonthsResponseItem> {
+    if let Ok(cache) = month_cache.read() {
+        let mut results = Vec::new();
+        for item in cache
+            .iter()
+            .filter(|i| i.year_month >= *start && i.year_month <= *stop)
+        {
+            results.push(MonthsResponseItem {
+                year: item.year_month.year,
+                month: item.year_month.month,
+                envoy_total_watts: item.envoy_total_watts,
+                zever_total_watts: item.zever_total_watts,
+            });
+        }
+
+        log::info!(
+            "Retrieved {} entries by month summary cache for {} to {} range",
+            results.len(),
+            start,
+            stop
+        );
+        return results;
+    } else {
+        log::error!("Failed to acquire read lock for month cache");
+        return Vec::new();
+    }
+}
+
+fn compact_missing_months_to_ranges(missing_year_months: &[YearMonth]) -> Vec<YearMonthRange> {
+    let mut results = Vec::new();
+    if missing_year_months.len() < 1 {
+        return results;
+    }
+
+    let mut start_index = 0;
+    let mut current_year_month = missing_year_months[start_index].clone();
+    for (index, next_year_month) in missing_year_months.iter().skip(1).enumerate() {
+        if current_year_month.get_next_month() != *next_year_month {
+            results.push(
+                YearMonthRange::new(&missing_year_months[start_index], &current_year_month)
+                    .unwrap(),
+            );
+
+            start_index = index;
+        }
+
+        current_year_month = next_year_month.clone();
+    }
+
+    let maybe_last_result_entry = results.last();
+    if maybe_last_result_entry.is_none()
+        || maybe_last_result_entry.unwrap().stop() < *missing_year_months.last().unwrap()
+    {
+        results.push(
+            YearMonthRange::new(&missing_year_months[start_index], &current_year_month).unwrap(),
+        );
+    }
+
+    return results;
+}
+
+fn insert_missing_months_in_month_cache(
+    summaries: &[MonthsResponseItem],
+    month_cache: &RwLock<Vec<CachedMonthsResponseItem>>,
+) {
+    if summaries.len() < 1 {
+        return;
+    }
+
+    if let Ok(mut cache) = month_cache.write() {
+        let first_summary_year_month = YearMonth {
+            year: summaries[0].year,
+            month: summaries[0].month,
+        };
+        let mut summary_insertion_index = cache
+            .iter()
+            .enumerate()
+            .find_map(|(index, item)| {
+                if item.year_month > first_summary_year_month {
+                    return Some(index - 1);
+                }
+
+                return None;
+            })
+            .unwrap_or(0);
+        let current_year_month = YearMonth::today();
+
+        for summary in summaries.iter() {
+            let summary_year_month = YearMonth {
+                year: summary.year,
+                month: summary.month,
+            };
+            // Do not cache results that are subject to change, such as the
+            // current month or any future month
+            if summary_year_month >= current_year_month {
+                break;
+            }
+
+            let to_insert = CachedMonthsResponseItem {
+                year_month: summary_year_month,
+                envoy_total_watts: summary.envoy_total_watts,
+                zever_total_watts: summary.zever_total_watts,
+            };
+            if summary_insertion_index < cache.len() {
+                while cache[summary_insertion_index].year_month < summary_year_month {
+                    summary_insertion_index += 1;
+                }
+
+                if summary_insertion_index < cache.len() {
+                    cache.insert(summary_insertion_index, to_insert);
+                    summary_insertion_index += 1;
+                } else {
+                    cache.push(to_insert);
+                }
+            } else {
+                cache.push(to_insert);
+                summary_insertion_index += 1;
+            }
+        }
+    } else {
+        log::error!("Failed to acquire write lock for month cache");
+    }
+}
+
+#[derive(serde::Serialize)]
+#[serde(rename_all = "camelCase")]
+struct MonthsResponse {
+    month_logs: Vec<MonthsResponseItem>,
+}
+
+#[derive(serde::Serialize)]
+#[serde(rename_all = "camelCase")]
+struct MonthsResponseItem {
+    year: i32,
+    month: u8,
+    envoy_total_watts: i32,
+    zever_total_watts: i32,
+}
+
+#[derive(Clone)]
+struct CachedMonthsResponseItem {
+    year_month: YearMonth,
+    envoy_total_watts: i32,
+    zever_total_watts: i32,
+}

systemd/electricity-server.service

@@ -1,13 +1,12 @@
 [Unit]
-Description=A .NET Core application providing the Electricity REST API
+Description=The electricity JSON API written in rust
 Requires=network.target
 After=network.target
 
 [Service]
 Type=simple
-Environment=ASPNETCORE_URLS=http://*:3002
+WorkingDirectory=/home/pi/project/home-data-collection-tools/target/release
-WorkingDirectory=/home/pi
+ExecStart=/home/pi/project/home-data-collection-tools/target/release/electricity_api --database-path /home/pi/logs/electricity.db --listening-port 3002 --http-header-name-to-validate 'X-Real-IP' --http-header-value-to-validate 'IP_ADDR_V4_1,IP_ADDR_V4_2'
-ExecStart=/home/pi/.dotnet/dotnet /home/pi/bin/Electricity.Api/Electricity.Api.dll --connection-string /home/pi/logs/electricity.logs
 Restart=on-abnormal
 RestartSec=30
 User=pi

systemd/solar-server.service

@@ -1,13 +1,12 @@
 [Unit]
-Description=A .NET Core application providing the Solar REST API
+Description=The solar JSON API written in rust
 Requires=network.target
 After=network.target
 
 [Service]
 Type=simple
-Environment=ASPNETCORE_URLS=http://*:3001
+WorkingDirectory=/home/pi/project/home-data-collection-tools/target/release
-WorkingDirectory=/home/pi
+ExecStart=/home/pi/project/home-data-collection-tools/target/release/solar_api --database-path /home/pi/logs/solarpaneloutput.db --listening-port 3001
-ExecStart=/home/pi/.dotnet/dotnet /home/pi/bin/Solar.Api/Solar.Api.dll
 Restart=on-abnormal
 RestartSec=30
 User=pi