WIP: migrations

source/db/db.d

@@ -23,6 +23,7 @@ class DB {
   protected DBSettings m_settings;
   protected DataSource m_ds;
   protected Connection m_conn;
+  protected Statement m_stmt = null;
 
   this(DBSettings settings) {
     this.m_settings = settings;
@@ -46,5 +47,42 @@ class DB {
   void connect() {
     this.m_ds = this.getDataSource();
     this.m_conn = this.m_ds.getConnection();
+    this.m_conn.setAutoCommit(false);
+  }
+
+  int runUpdate(string statement) {
+    if (this.m_stmt is null)
+      this.m_stmt = this.m_conn.createStatement();
+
+    debugF!"Running update: %s"(statement);
+
+    return this.m_stmt.executeUpdate(statement);
+  }
+
+  ResultSet runQuery(string statement) {
+    if (this.m_stmt is null)
+      this.m_stmt = this.m_conn.createStatement();
+
+    debugF!"Running query: %s"(statement);
+
+    return this.m_stmt.executeQuery(statement);
+  }
+
+  void runMigrations() {
+    ResultSet rs = this.runQuery(
+      `select * from information_schema.tables where table_name = 'migrations';`,
+    );
+
+    bool exists = rs.next();
+    int ret = 0;
+
+    if (exists == false) {
+      ret |= this.runUpdate(
+        `create table migrations(
+          id serial,
+          name character varying
+        )`,
+      );
+    }
   }
 }