Allow source object to be created even if dir doesn't exist

A job may remain in the database after the source dir has been deleted.
The source object has been changed to permit construction even if the
source it represents doesn't exist, but will throw an exception if any
requests are made of the object.

lib/RippingCluster/Source.class.php

@@ -7,14 +7,15 @@ class RippingCluster_Source {
     const PM_AUDIO = 2;
     const PM_SUBTITLE = 3;
     
+    protected $exists;
     protected $filename;
     protected $plugin;
     protected $titles = array();
 
-    public function __construct($source_filename, $plugin) {
+    public function __construct($source_filename, $plugin, $exists) {
+        $this->exists   = $exists;
         $this->filename = $source_filename;
         $this->plugin   = $plugin;
-
     }
     
     public static function isCached($source_filename) {
@@ -26,6 +27,10 @@ class RippingCluster_Source {
     }
     
     public function cache() {
+        if (!$this->exists) {
+            throw new RippingCluster_Exception_InvalidSourceDirectory();
+        }
+        
         $main   = RippingCluster_Main::instance();
         $cache  = $main->cache();
         $config = $main->config();
@@ -38,10 +43,18 @@ class RippingCluster_Source {
     }
     
     public function addTitle(RippingCluster_Rips_SourceTitle $title) {
+        if (!$this->exists) {
+            throw new RippingCluster_Exception_InvalidSourceDirectory();
+        }
+        
         $this->titles[] = $title;
     }
     
 	public function longestTitle() {
+	    if (!$this->exists) {
+            throw new RippingCluster_Exception_InvalidSourceDirectory();
+        }
+        
         $longest_title = null;
 	    $maximum_duration = 0;
 	    
@@ -61,6 +74,10 @@ class RippingCluster_Source {
     }
 
     public function longestTitleIndex() {
+        if (!$this->exists) {
+            throw new RippingCluster_Exception_InvalidSourceDirectory();
+        }
+        
         $longest_index = null;
         $maximmum_duration = 0;
 
@@ -93,10 +110,18 @@ class RippingCluster_Source {
     }
 
     public function titleCount() {
+        if (!$this->exists) {
+            throw new RippingCluster_Exception_InvalidSourceDirectory();
+        }
+        
         return count($this->titles);
     }
 
     public function titles() {
+        if (!$this->exists) {
+            throw new RippingCluster_Exception_InvalidSourceDirectory();
+        }
+        
         return $this->titles;
     }
 

lib/RippingCluster/Source/Plugin/HandBrake.class.php

@@ -48,14 +48,14 @@ class RippingCluster_Source_Plugin_HandBrake implements RippingCluster_Source_IP
 
         // Ensure the source is a valid directory, and lies below the configured source_dir
         if ( ! self::isValidSource($source_filename)) {
-            throw new RippingCluster_Exception_InvalidSourceDirectory($source_filename);
+            return new RippingCluster_Source($source_filename, self::name(), false);
         }
             
         $source = null;
         if ($use_cache && $cache->exists($source_filename)) {
             $source = unserialize($cache->fetch($source_filename));
         } else {
-            $source = new RippingCluster_Source($source_filename, self::name());
+            $source = new RippingCluster_Source($source_filename, self::name(), true);
             
             if ($scan) {
                 $source_shell = escapeshellarg($source_filename);