[linqpad6] Support appsettings.json for typed data context (#52)

* [LINQPAD6] add support for appsettings.json for static connection * release notes
linq2db · Apr 24, 2021 · 2ef1dcb · 2ef1dcb
1 parent b7c7edf
commit 2ef1dcb
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Showing 6 changed files with 99 additions and 1 deletion.
diff --git a/Directory.Packages.props b/Directory.Packages.props
@@ -39,5 +39,6 @@
 		<PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="3.9.0" />
 		<PackageVersion Include="Npgsql" Version="5.0.4" />
 		<PackageVersion Include="FirebirdSql.Data.FirebirdClient" Version="8.0.1" />
+		<PackageVersion Include="System.Text.Json" Version="5.0.2" />
 	</ItemGroup>
 </Project>
diff --git a/Source/AppJsonConfig.cs b/Source/AppJsonConfig.cs
@@ -0,0 +1,56 @@
+#if NETCORE
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text.Json;
+using LinqToDB.Configuration;
+
+namespace LinqToDB.LINQPad
+{
+	internal class AppJsonConfig : ILinqToDBSettings
+	{
+		public static ILinqToDBSettings Load(string configPath)
+		{
+			var config = JsonSerializer.Deserialize<JsonConfig>(File.ReadAllText(configPath));
+
+			return new AppJsonConfig(config?.ConnectionStrings?.Select(entry => (IConnectionStringSettings)new ConnectionStringSettings(entry.Key, entry.Value)).ToArray()
+				?? Array.Empty<IConnectionStringSettings>());
+		}
+
+		private readonly IConnectionStringSettings[] _connectionStrings;
+
+		public AppJsonConfig(IConnectionStringSettings[] connectionStrings)
+		{
+			_connectionStrings = connectionStrings;
+		}
+
+		IEnumerable<IDataProviderSettings>     ILinqToDBSettings.DataProviders        => Array.Empty<IDataProviderSettings>();
+		string?                                ILinqToDBSettings.DefaultConfiguration => null;
+		string?                                ILinqToDBSettings.DefaultDataProvider  => null;
+		IEnumerable<IConnectionStringSettings> ILinqToDBSettings.ConnectionStrings    => _connectionStrings;
+
+		private class JsonConfig
+		{
+			public IDictionary<string, string>? ConnectionStrings { get; set; }
+		}
+
+		private class ConnectionStringSettings : IConnectionStringSettings
+		{
+			private readonly string _name;
+			private readonly string _connectionString;
+
+			public ConnectionStringSettings(string name, string connectionString)
+			{
+				_name             = name;
+				_connectionString = connectionString;
+			}
+
+			string  IConnectionStringSettings.ConnectionString => _connectionString;
+			string  IConnectionStringSettings.Name             => _name;
+			string? IConnectionStringSettings.ProviderName     => null;
+			bool    IConnectionStringSettings.IsGlobal         => false;
+		}
+	}
+}
+#endif
diff --git a/Source/ConnectionDialog.xaml.cs b/Source/ConnectionDialog.xaml.cs
@@ -232,6 +232,35 @@ void ChooseConfiguration(object sender, RoutedEventArgs e)
 			{
 				var oldCursor = Cursor;
 
+#if NETCORE
+				try
+				{
+					Mouse.OverrideCursor = Cursors.Wait;
+
+					if (Model.AppConfigPath!.EndsWith(".json", StringComparison.OrdinalIgnoreCase))
+					{
+						var config = AppJsonConfig.Load(Model.AppConfigPath!);
+						if (config.ConnectionStrings.Any())
+						{
+							var result = (string?)Dialogs.PickFromList("Choose Connection String", config.ConnectionStrings.Select(_ => _.Name).ToArray());
+
+							if (result != null)
+								Model.CustomConfiguration = result;
+						}
+					}
+
+					return;
+				}
+				catch (Exception ex)
+				{
+					MessageBox.Show(this, ex.Message, "Config file open error", MessageBoxButton.OK, MessageBoxImage.Error);
+				}
+				finally
+				{
+					Mouse.OverrideCursor = oldCursor;
+				}
+#endif
+
 				try
 				{
 					Mouse.OverrideCursor = Cursors.Wait;
@@ -247,7 +276,7 @@ void ChooseConfiguration(object sender, RoutedEventArgs e)
 
 					Mouse.OverrideCursor = oldCursor;
 
-					var result = (string?)Dialogs.PickFromList("Choose Custom Type", configurations.ToArray());
+					var result = (string?)Dialogs.PickFromList("Choose Connection String", configurations.ToArray());
 
 					if (result != null)
 						Model.CustomConfiguration = result;

diff --git a/Source/LinqToDBStaticDriver.cs b/Source/LinqToDBStaticDriver.cs
@@ -47,6 +47,8 @@ public override ParameterDescriptor[] GetContextConstructorParameters(IConnectio
 
 		public override object[] GetContextConstructorArguments(IConnectionInfo cxInfo)
 		{
+			TryLoadAppSettingsJson(cxInfo);
+
 			var configuration = cxInfo.DriverData.Element(CX.CustomConfiguration)?.Value;
 
 			if (configuration != null)
@@ -78,5 +80,13 @@ public override void TearDownContext(IConnectionInfo cxInfo, object context, Que
 			dynamic ctx = context;
 			ctx.Dispose();
 		}
+
+		private void TryLoadAppSettingsJson(IConnectionInfo cxInfo)
+		{
+			#if NETCORE
+			if (cxInfo.AppConfigPath?.EndsWith(".json", StringComparison.OrdinalIgnoreCase) == true)
+				DataConnection.DefaultSettings = AppJsonConfig.Load(cxInfo.AppConfigPath!);
+			#endif
+		}
 	}
 }
diff --git a/Source/linq2db.LINQPad.csproj b/Source/linq2db.LINQPad.csproj
@@ -79,6 +79,7 @@
 		<PackageReference Include="Oracle.ManagedDataAccess.Core" />
 		<PackageReference Include="IBM.Data.DB2.Core" />
 		<PackageReference Include="dotMorten.Microsoft.SqlServer.Types" />
+		<PackageReference Include="System.Text.Json" />
 	</ItemGroup>
 
 	<ItemGroup>

diff --git a/release-notes.md b/release-notes.md
@@ -5,6 +5,7 @@
 - [ALL] fix issue with command timeout option being ignored ([#47](https://github.com/linq2db/linq2db.LINQPad/issues/47))
 - [LINQPAD6] dependency update: FirebirdSql.Data.FirebirdClient 7.10.1 -> 8.0.1
 - [LINQPAD6] improve fix for [#39](https://github.com/linq2db/linq2db.LINQPad/issues/39)
+- [LINQPAD6] support connection configuration using appsettings.json for typed data context ([#38](https://github.com/linq2db/linq2db.LINQPad/issues/38))
 
 # Release 3.3.1
 - [LINQPAD6] fix incorrect versions for dependencies in nuget version of driver