Feature: Add connection strings handling for DB providers

TShockAPI/Configuration/TShockConfig.cs

@@ -532,10 +532,35 @@ public class TShockSettings
 		[Description("The type of database to use when storing data (either \"sqlite\", \"mysql\" or \"postgres\").")]
 		public string StorageType = "sqlite";
 
+		/// <summary>
+		/// The connection string to use when connecting to a SQLite database.
+		/// </summary>
+		/// <remarks>This property will override the <see cref="SqliteDBPath"/> property, if used.</remarks>
+		/// <seealso href="https://www.connectionstrings.com/sqlite-net-provider/">Example SQLite connection strings (connectionstrings.com)</seealso>
+		[Description("The connection string to use when connecting to a SQLite database. This property will override the SqliteDBPath property, if used.")]
+		public string SqliteConnectionString = "";
+
 		/// <summary>The path of sqlite db.</summary>
 		[Description("The path of sqlite db.")]
 		public string SqliteDBPath = "tshock.sqlite";
 
+		/// <summary>
+		/// The connection string to use when connecting to a MySQL database.
+		/// </summary>
+		/// <remarks>
+		/// This property will override the
+		/// <see cref="MySqlHost"/>,
+		/// <see cref="MySqlDbName"/>,
+		/// <see cref="MySqlUsername"/>,
+		/// and <see cref="MySqlPassword"/> properties, if used.
+		/// </remarks>
+		/// <seealso href="https://www.connectionstrings.com/mysql-connector-net-mysqlconnection/">
+		/// Example MySQL connection strings (connectionstrings.com)
+		/// </seealso>
+		[Description("The connection string to use when connecting to a MySQL database. " +
+		             "This property will override the MySqlHost, MySqlDbName, MySqlUsername and MySqlPassword properties, if used.")]
+		public string MySqlConnectionString = "";
+
 		/// <summary>The MySQL hostname and port to direct connections to.</summary>
 		[Description("The MySQL hostname and port to direct connections to.")]
 		public string MySqlHost = "localhost:3306";
@@ -552,6 +577,21 @@ public class TShockSettings
 		[Description("The password used when connecting to a MySQL database.")]
 		public string MySqlPassword = "";
 
+		/// <summary>
+		/// The connection string to use when connecting to a Postgres database.
+		/// </summary>
+		/// <remarks>
+		/// This property will override the
+		/// <see cref="PostgresHost"/>,
+		/// <see cref="PostgresDbName"/>,
+		/// <see cref="PostgresUsername"/>,
+		/// and <see cref="PostgresPassword"/> properties, if used.
+		/// </remarks>
+		/// <seealso href="https://www.connectionstrings.com/npgsql/">Example Npgsql connection strings (connectionstrings.com)</seealso>
+		[Description("The connection string to use when connecting to a Postgres database. " +
+		             "This property will override the PostgresHost, PostgresDbName, PostgresUsername and PostgresPassword properties, if used.")]
+		public string PostgresConnectionString = "";
+
 		///<summary>The Postgres hostname and port to direct connections to.</summary>
 		[Description("The Postgres hostname and port to direct connections to.")]
 		public string PostgresHost = "";

TShockAPI/DB/DbBuilder.cs

@@ -1,4 +1,5 @@
-using System.Data;
+using System;
+using System.Data;
 using System.Diagnostics;
 using System.IO;
 using Microsoft.Data.Sqlite;
@@ -53,22 +54,39 @@ public IDbConnection BuildDbConnection()
 
 	private SqliteConnection BuildSqliteConnection()
 	{
-		string dbFilePath = Path.Combine(_savePath, _config.Settings.SqliteDBPath);
+		try
+		{
+			// Handle first the connection string, if specified.
+			if (_config.Settings.SqliteConnectionString is not (null or ""))
+			{
+				// Use factory to build the string, the path may be relative.
+				SqliteConnectionStringBuilder builder = new(_config.Settings.SqliteConnectionString);
+				builder.DataSource = GetDbFile(builder.DataSource).FullName;
+				return new(builder.ConnectionString);
+			}
 
-		if (Path.GetDirectoryName(dbFilePath) is not { } dbDirPath)
+			// Fallback to SqliteDBPath setting.
+			string dbFilePath = GetDbFile(_config.Settings.SqliteDBPath).FullName;
+			return new($"Data Source={dbFilePath};");
+		}
+		catch (SqliteException e)
 		{
-			throw new DirectoryNotFoundException($"The SQLite database path '{dbFilePath}' could not be found.");
+			ServerApi.LogWriter.PluginWriteLine(_caller, e.ToString(), TraceLevel.Error);
+			throw new("Sqlite not setup correctly", e);
 		}
-
-		Directory.CreateDirectory(dbDirPath);
-
-		return new($"Data Source={dbFilePath}");
 	}
 
 	private MySqlConnection BuildMySqlConnection()
 	{
 		try
 		{
+			// If specified, use the connection string instead of other parameters.
+			if (_config.Settings.MySqlConnectionString is not (null or ""))
+			{
+				MySqlConnectionStringBuilder builder = new(_config.Settings.MySqlConnectionString);
+				return new(builder.ToString());
+			}
+
 			string[] hostport = _config.Settings.MySqlHost.Split(':');
 
 			MySqlConnectionStringBuilder connStrBuilder = new()
@@ -93,6 +111,13 @@ private NpgsqlConnection BuildPostgresConnection()
 	{
 		try
 		{
+			// If specified, use the connection string instead of other parameters.
+			if (_config.Settings.PostgresConnectionString is not (null or ""))
+			{
+				NpgsqlConnectionStringBuilder builder = new(_config.Settings.PostgresConnectionString);
+				return new(builder.ToString());
+			}
+
 			string[] hostport = _config.Settings.PostgresHost.Split(':');
 
 			NpgsqlConnectionStringBuilder connStrBuilder = new()
@@ -112,4 +137,21 @@ private NpgsqlConnection BuildPostgresConnection()
 			throw new("Postgres not setup correctly", e);
 		}
 	}
+
+	private FileInfo GetDbFile(string path)
+	{
+		FileInfo dbFile = new(Path.IsPathRooted(path) ? path : Path.Combine(_savePath, path));
+
+		if (dbFile.Directory is not { } dbDir)
+		{
+			throw new DirectoryNotFoundException($"The SQLite database path '{path}' could not be found.");
+		}
+
+		if (!dbDir.Exists)
+		{
+			dbDir.Create();
+		}
+
+		return dbFile;
+	}
 }