Rewrite electricity-logger to use an sqlite3 database

script/solar/README.md

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+# Scripts
+
+This directory contains the following 2 scripts:
+- `createdb.sh` is used to create the SQL database file used by the logger
+- `migratedb.sh` is used to fill the newly created SQL database with the old file based logging content
+
+The created database exists out of 3 rows, ignoring the `RowId` column:
+- `DateTimeUtc` is an `INTEGER` and represents the UTC date and time in the Unix epoch format
+- `Watts` is an `INTEGER` and represents the power output at the time of logging
+- `KilowattHour` is a `REAL` and represents the cumulative power generated that day
+
+Try running each script without any arguments for more help or read their source code.

script/solar/createdb.sh

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+#!/bin/bash
+
+if [ "$#" -ne 1 ]; then
+	echo "Usage: $0 [/path/to/db/database].db";
+	exit 1;
+fi
+
+echo "Creating database file $1...";
+touch "$1";
+if ! [ -f "$1" ]; then
+	echo "Cannot open or create database file $1, aborting.";
+	exit 1;
+fi
+
+TABLE_NAME="SolarPanelOutput";
+
+echo "Creating table $TABLE_NAME...";
+sqlite3 $1 "CREATE TABLE IF NOT EXISTS $TABLE_NAME (Date TEXT NOT NULL, TimeUtc TEXT NOT NULL, Watts INTEGER NOT NULL, KilowattHour REAL NOT NULL);";
+
+echo "Creating indexes on table $TABLE_NAME...";
+sqlite3 $1 "CREATE INDEX IF NOT EXISTS idx_Date ON $TABLE_NAME (Date);"
+sqlite3 $1 "CREATE INDEX IF NOT EXISTS idx_TimeUtc ON $TABLE_NAME (TimeUtc);"
+
+TABLE2_NAME="SolarPanelSummary";
+
+echo "Creating table $TABLE2_NAME...";
+sqlite3 $1 "CREATE TABLE IF NOT EXISTS $TABLE2_NAME (Date TEXT NOT NULL UNIQUE, Kilowatthour REAL NOT NULL);"
+
+echo "Creating indexes on table $TABLE2_NAME";
+sqlite3 $1 "CREATE UNIQUE INDEX IF NOT EXISTS idx_Date_$TABLE2_NAME on $TABLE2_NAME (Date);"

script/solar/migratedb.sh

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+#!/bin/bash
+
+TABLE_NAME="SolarPanelOutput";
+
+if [ "$#" -ne 2 ]; then
+	echo "Usage: $0 [/log/file/directory/] [/path/to/db/database].db";
+fi
+
+if ! [ -d "$1" ]; then
+	echo "Error opening log file directory $1, aborting.";
+	exit 1;
+fi
+
+if ! [ -f "$2" ]; then
+	echo "Error opening database file $2, aborting.";
+	exit 1;
+fi
+
+if [ "${$1}" != */ ]; then
+	$1 = "$1/";
+fi
+
+for DIRECTORY in $1*/; do
+	if [ -d "$DIRECTORY" ]; then
+		echo "Checking out directory $DIRECTORY...";
+		for FILE in $DIRECTORY*; do
+			if [ -f "$FILE" ]; then
+				echo "Processing file $FILE...";
+				while read line; do
+					PROCESSED_LINE="$(echo "$line" | tr -s ' ')";
+					ISODATE="$(echo "$PROCESSED_LINE" | cut -d ' ' -f1)";
+					WATT="$(echo "$PROCESSED_LINE" | cut -d ' ' -f2)";
+					KILOWATTHR="$(echo "$PROCESSED_LINE" | cut -d ' ' -f3)";
+
+					EPOCHDATE="$(date -d"$ISODATE" +%s)"
+					sqlite3 $2 "INSERT INTO $TABLE_NAME VALUES($EPOCHDATE, $WATT, $KILOWATTHR);";
+				done < "$FILE"
+			fi
+		done;
+	fi
+done