DB: add SQLite support

source/db/db.d

@@ -1,15 +1,18 @@
 module db.db;
 
+import std.json;
+
 import slf4d;
 
 import ddbc.core;
 import hibernated.core;
+
 import db.types;
 
 enum DBConnector {
-  DB_MYSQL,
+  Mysql,
-  DB_PGSQL,
+  Postgres,
-  DB_SQLITE,
+  Sqlite,
 }
 
 struct DBSettings {
@@ -19,6 +22,39 @@ struct DBSettings {
   string username;
   string password;
   string dbname;
+
+  static DBSettings fromJson(JSONValue cfg) {
+    DBSettings settings;
+
+    with (settings) {
+      dbname = cfg["dbName"].str;
+
+      switch (cfg["connector"].str) {
+      case "postgresql":
+        connector = DBConnector.Postgres;
+        break;
+      case "sqlite":
+        connector = DBConnector.Sqlite;
+        break;
+      default:
+        throw new Exception("Database connector `" ~ cfg["connector"].str ~ "` not supported");
+      }
+
+      if ("host" in cfg)
+        host = cfg["host"].str;
+
+      if ("port" in cfg)
+        port = cast(ushort) cfg["port"].integer;
+
+      if ("username" in cfg)
+        username = cfg["username"].str;
+
+      if ("password" in cfg)
+        username = cfg["password"].str;
+    }
+
+    return settings;
+  }
 }
 
 class DB {
@@ -40,7 +76,7 @@ class DB {
     Dialect dialect;
 
     switch (this.m_settings.connector) {
-    case DBConnector.DB_PGSQL:
+    case DBConnector.Postgres:
       debugF!"Using PGSQL driver";
 
       import ddbc.drivers.pgsqlddbc;
@@ -55,6 +91,22 @@ class DB {
       dialect = new PGSQLDialect();
       break;
 
+    case DBConnector.Sqlite:
+      debugF!"Using SQLite driver";
+
+      import ddbc.drivers.sqliteddbc;
+
+      driver = new SQLITEDriver();
+      url = this.m_settings.dbname;
+
+      static import std.file;
+
+      if (std.file.exists(url))
+        std.file.remove(url);
+
+      dialect = new SQLiteDialect();
+      break;
+
     default:
       throw new Exception("Database connector not supported (yet)");
     }