Add database wrapper class and new connection method

Uses the Singleton pattern to ensure all queries use the same
database connection that is released upon script completion.

All database connections should now be called with DB::connect() and
not db_connect().

Signed-off-by: canyonknight <canyonknight@gmail.com>
Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>

web/lib/DB.class.php

@@ -0,0 +1,28 @@
+<?php
+
+class DB {
+
+	/**
+	 * A database object
+	 */
+	private static $dbh = null;
+
+	/**
+	 * Return an already existing database object or newly instantiated object
+	 *
+	 * @return \PDO A database connection using PDO
+	 */
+	public static function connect() {
+		if (self::$dbh === null) {
+			try {
+				self::$dbh = new PDO(AUR_db_DSN_prefix . ":" . AUR_db_host
+					. ";dbname=" . AUR_db_name, AUR_db_user, AUR_db_pass);
+				self::$dbh->exec("SET NAMES 'utf8' COLLATE 'utf8_general_ci';");
+			} catch (PDOException $e) {
+				die('Error - Could not connect to AUR database');
+			}
+		}
+
+		return self::$dbh;
+	}
+}