Initial commit from private

Weather/Service/Data/Database.cs

@@ -0,0 +1,81 @@
+using Dapper;
+using Microsoft.Extensions.Configuration;
+using Npgsql;
+using Weather.Models;
+
+namespace Weather.Service.Data
+{
+    public class Database
+    {
+        private readonly IConfiguration _configuration;
+
+        public Database(IConfiguration configuration)
+        {
+            _configuration = configuration;
+        }
+
+        public void EnsureDatabase()
+        {
+            var connectionStringBuilder = new NpgsqlConnectionStringBuilder
+            {
+                Host = _configuration["Weather:Database:Host"],
+                Username = _configuration["Weather:Database:User"],
+                Password = _configuration["Weather:Database:Password"],
+                Database = "postgres"
+            };
+
+            using (var connection = new NpgsqlConnection(connectionStringBuilder.ConnectionString))
+            {
+                var command = new NpgsqlCommand { Connection = connection };
+
+                connection.Open();
+
+                // Check to see if the database exists
+                command.CommandText = $"SELECT TRUE from pg_database WHERE datname='{_configuration["Weather:Database:Name"]}'";
+                var databaseExists = (bool?)command.ExecuteScalar();
+
+                // Create database if needed
+                if (!databaseExists.GetValueOrDefault(false))
+                {
+                    command.CommandText = $"CREATE DATABASE {_configuration["Weather:Database:Name"]}";
+                    command.ExecuteNonQuery();
+                }
+
+                // Switch to the database now that we're sure it exists
+                connection.ChangeDatabase(_configuration["Weather:Database:Name"]);
+
+                var schema = ResourceReader.GetString("Weather.Service.Data.Resources.Schema.sql");
+
+                // Make sure the database is up to date
+                command.CommandText = schema;
+                command.ExecuteNonQuery();
+            }
+        }
+
+        private NpgsqlConnection CreateConnection()
+        {
+            var connectionStringBuilder = new NpgsqlConnectionStringBuilder
+            {
+                Host = _configuration["Weather:Database:Host"],
+                Username = _configuration["Weather:Database:User"],
+                Password = _configuration["Weather:Database:Password"],
+                Database = _configuration["Weather:Database:Name"]
+            };
+
+            var connection = new NpgsqlConnection(connectionStringBuilder.ConnectionString);
+            connection.Open();
+
+            return connection;
+        }
+
+        public void StoreWeatherData(WeatherMessage weatherMessage)
+        {
+            using (var connection = CreateConnection())
+            {
+                var query = ResourceReader.GetString("Weather.Service.Data.Resources.CreateReading.sql");
+
+                connection.Execute(query, weatherMessage);
+            }
+        }
+    }
+}