experimental singleton-based Db connection

classes/db.php

@@ -0,0 +1,73 @@
+<?php
+class Db implements IDb {
+	private static $instance;
+	private $adapter;
+
+	private function __construct() {
+		switch (DB_TYPE) {
+		case "mysql":
+			$this->adapter = new Db_Mysql();
+			break;
+		case "pgsql":
+			$this->adapter = new Db_Pgsql();
+			break;
+		default:
+			die("Unknown DB_TYPE: " . DB_TYPE);
+		}
+
+		$this->adapter->connect(DB_HOST, DB_USER, DB_PASS, DB_NAME, DB_PORT);
+	}
+
+	private function __clone() {
+		//
+	}
+
+	public static function get() {
+		if (self::$instance == null)
+			self::$instance = new self();
+
+		return self::$instance;
+	}
+
+	static function quote($str){
+		return("'$str'");
+	}
+
+	function connect($host, $user, $pass, $db, $port) {
+		//return $this->adapter->connect($host, $user, $pass, $db, $port);
+	}
+
+	function escape_string($s, $strip_tags = true) {
+		return $this->adapter->escape_string($s, $strip_tags);
+	}
+
+	function query($query, $die_on_error = true) {
+		return $this->adapter->query($query, $die_on_error);
+	}
+
+	function fetch_assoc($result) {
+		return $this->adapter->fetch_assoc($result);
+	}
+
+	function num_rows($result) {
+		return $this->adapter->num_rows($result);
+	}
+
+	function fetch_result($result, $row, $param) {
+		return $this->adapter->fetch_result($result, $row, $param);
+	}
+
+	function close() {
+		return $this->adapter->close();
+	}
+
+	function affected_rows($result) {
+		return $this->adapter->affected_rows($result);
+	}
+
+	function last_error() {
+		return $this->adapter->last_error();
+	}
+
+}
+?>