revamp service factory

git-svn-id: https://semanticscuttle.svn.sourceforge.net/svnroot/semanticscuttle/trunk@393 b3834d28-1941-0410-a4f8-b48e95affb8f

1 files changed, 102 insertions, 32 deletions

diff --git a/src/SemanticScuttle/Service/Factory.php b/src/SemanticScuttle/Service/Factory.php
index b4ba28e..b6f79d5 100644
--- a/src/SemanticScuttle/Service/Factory.php
+++ b/src/SemanticScuttle/Service/Factory.php
@@ -3,42 +3,112 @@
 
 class SemanticScuttle_Service_Factory
 {
-	public function __construct($db, $serviceoverrules = array())
+    /**
+     * Array of service instances.
+     * Key is service name (i.e. "Bookmark")
+     *
+     * @var array
+     */
+    protected static $instances = array();
+
+    /**
+     * Database connection
+     *
+     * @var sql_qb
+     */
+    protected static $db = null;
+
+    /**
+     * Array of service names -> new service class
+     * in case you want to overwrite the services.
+     *
+     * Key is the old service name (i.e. "Bookmark"),
+     * value the new class name, e.g.
+     * "My_Cool_Own_BookmarkService"
+     *
+     * @var array
+     */
+    protected static $serviceoverrides = array();
+
+
+
+    /**
+     * Returns the service for the given name.
+     *
+     * @param string $name Service name (i.e. "Bookmark")
+     *
+     * @return SemanticScuttle_Service Service object
+     */
+    public static function getServiceInstance($name)
+    {
+        self::loadDb();
+        self::loadService($name);
+        return self::$instances[$name];
+    }
+
+
+
+    /**
+     * Loads service with the given name into
+     * self::$instances[$name].
+     *
+     * @param string $name Service name (i.e. 'Bookmark')
+     *
+     * @return void
+     */
+    protected static function loadService($name)
     {
-	}
+        if (isset(self::$instances[$name])) {
+            return;
+        }
+
+        if (isset(self::$serviceoverrides[$name])) {
+            $class = self::$serviceoverrides[$name];
+        } else {
+            $class = 'SemanticScuttle_Service_' . $name;
+        }
+
+        if (!class_exists($class)) {
+            //PEAR classname to filename rule
+            $file = str_replace('_', '/', $class) . '.php';
+            require_once $file;
+        }
+
+        self::$instances[$name] = call_user_func(
+            array($class, 'getInstance'),
+            self::$db
+        );
+    }
 
-	public function getServiceInstance($name, $servicedir = null)
+
+
+    /**
+     * Loads self::$db if it is not loaded already.
+     *
+     * @return void
+     */
+    protected static function loadDb()
     {
-		global $dbhost, $dbuser, $dbpass, $dbname, $dbport, $dbpersist, $dbtype;
-		static $instances = array();
-		static $db;
-		if (!isset($db)) {
-			require_once 'SemanticScuttle/db/'. $dbtype .'.php';
-			$db = new sql_db();
-			$db->sql_connect($dbhost, $dbuser, $dbpass, $dbname, $dbport, $dbpersist);
-			if(!$db->db_connect_id) {
-				message_die(CRITICAL_ERROR, "Could not connect to the database", $db);
-			}
-			$db->sql_query("SET NAMES UTF8"); 
-		}		
-		
-		if (!isset($instances[$name])) {
-			if (isset($serviceoverrules[$name])) {
-				$name = $serviceoverrules[$name];
-			}
-			if (!class_exists($name)) {
-				if (!isset($servicedir)) {
-					$servicedir = 'SemanticScuttle/Service/';
-				}
-								
-				require_once $servicedir . $name . '.php';
-			}
-			$instances[$name] = call_user_func(
-                array('SemanticScuttle_Service_' . $name, 'getInstance'),
+        global $dbhost, $dbuser, $dbpass, $dbname, 
+            $dbport, $dbpersist, $dbtype;
+
+        if (self::$db !== null) {
+            return;
+        }
+        require_once 'SemanticScuttle/db/'. $dbtype .'.php';
+        $db = new sql_db();
+        $db->sql_connect(
+            $dbhost, $dbuser, $dbpass, $dbname, $dbport, $dbpersist
+        );
+        if(!$db->db_connect_id) {
+            message_die(
+                CRITICAL_ERROR,
+                'Could not connect to the database',
                 $db
             );
-		}
-		return $instances[$name];
-	}
+        }
+        $db->sql_query('SET NAMES UTF8');
+    }
+
 }
 ?>