Add power database support

Power/Service/Data/Database.cs

@@ -0,0 +1,91 @@
+using ChrisKaczor.HomeMonitor.Power.Service.Models;
+using Dapper;
+using Microsoft.Data.SqlClient;
+using Microsoft.Extensions.Configuration;
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace ChrisKaczor.HomeMonitor.Power.Service.Data
+{
+    public class Database
+    {
+        private readonly IConfiguration _configuration;
+
+        public Database(IConfiguration configuration)
+        {
+            _configuration = configuration;
+        }
+
+        public void EnsureDatabase()
+        {
+            var connectionStringBuilder = new SqlConnectionStringBuilder
+            {
+                DataSource = $"{_configuration["Power:Database:Host"]},{_configuration["Power:Database:Port"]}",
+                UserID = _configuration["Power:Database:User"],
+                Password = _configuration["Power:Database:Password"],
+                InitialCatalog = "master"
+            };
+
+            using var connection = new SqlConnection(connectionStringBuilder.ConnectionString);
+
+            var command = new SqlCommand { Connection = connection };
+
+            connection.Open();
+
+            // Check to see if the database exists
+            command.CommandText = $"SELECT CAST(1 as bit) from sys.databases WHERE name='{_configuration["Power:Database:Name"]}'";
+            var databaseExists = (bool?)command.ExecuteScalar();
+
+            // Create database if needed
+            if (!databaseExists.GetValueOrDefault(false))
+            {
+                command.CommandText = $"CREATE DATABASE {_configuration["Power:Database:Name"]}";
+                command.ExecuteNonQuery();
+            }
+
+            // Switch to the database now that we're sure it exists
+            connection.ChangeDatabase(_configuration["Power:Database:Name"]);
+
+            var schema = ResourceReader.GetString("ChrisKaczor.HomeMonitor.Power.Service.Data.Resources.Schema.sql");
+
+            // Make sure the database is up to date
+            command.CommandText = schema;
+            command.ExecuteNonQuery();
+        }
+
+        private SqlConnection CreateConnection()
+        {
+            var connectionStringBuilder = new SqlConnectionStringBuilder
+            {
+                DataSource = $"{_configuration["Power:Database:Host"]},{_configuration["Power:Database:Port"]}",
+                UserID = _configuration["Power:Database:User"],
+                Password = _configuration["Power:Database:Password"],
+                InitialCatalog = _configuration["Power:Database:Name"]
+            };
+
+            var connection = new SqlConnection(connectionStringBuilder.ConnectionString);
+            connection.Open();
+
+            return connection;
+        }
+
+        public void StorePowerData(PowerStatus powerStatus)
+        {
+            using var connection = CreateConnection();
+
+            var query = ResourceReader.GetString("ChrisKaczor.HomeMonitor.Power.Service.Data.Resources.CreateStatus.sql");
+
+            connection.Query(query, powerStatus);
+        }
+
+        public async Task<IEnumerable<PowerStatusGrouped>> GetStatusHistoryGrouped(DateTimeOffset start, DateTimeOffset end, int bucketMinutes)
+        {
+            await using var connection = CreateConnection();
+
+            var query = ResourceReader.GetString("ChrisKaczor.HomeMonitor.Power.Service.Data.Resources.GetStatusHistoryGrouped.sql");
+
+            return await connection.QueryAsync<PowerStatusGrouped>(query, new { Start = start, End = end, BucketMinutes = bucketMinutes });
+        }
+    }
+}

Power/Service/Data/Resources/CreateStatus.sql

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+INSERT INTO Status (Timestamp, Generation, Consumption)
+VALUES (@Timestamp, @Generation, @Consumption)

Power/Service/Data/Resources/GetStatusHistoryGrouped.sql

@@ -0,0 +1,14 @@
+SELECT Bucket,
+	   AVG(Generation) AS AverageGeneration,
+	   AVG(Consumption) AS AverageConsumption
+FROM (
+         SELECT CAST(FORMAT(Timestamp, 'yyyy-MM-ddTHH:') +
+                RIGHT('00' + CAST(DATEPART(MINUTE, Timestamp) / @BucketMinutes * @BucketMinutes AS VARCHAR), 2)
+				+ ':00+00:00' AS DATETIMEOFFSET)									  AS Bucket,
+                Generation,
+				Consumption
+         FROM Status
+         WHERE Timestamp BETWEEN @Start AND @End
+     ) AS Data
+GROUP BY Bucket
+ORDER BY Bucket

Power/Service/Data/Resources/Schema.sql

@@ -0,0 +1,9 @@
+IF NOT EXISTS(SELECT 1 FROM sys.tables WHERE name = 'Status')
+	CREATE TABLE Status
+	(
+		Timestamp           datetimeoffset	NOT NULL
+			CONSTRAINT status_pk
+				PRIMARY KEY,
+		Generation          int				NOT NULL,
+		Consumption			int				NOT NULL
+	);