Add support for replacing an item's data file.

client/Gallery3.php

@@ -129,10 +129,16 @@ class Gallery3 {
    * @return object  Gallery3
    */
   public function save() {
-    $response = Gallery3_Helper::request(
-      "put", $this->url, $this->token,
-      array("entity" => array_diff((array)$this->data->entity, $this->original_entity),
-            "members" => $this->data->members));
+    $data = array();
+    $data["entity"] = array_diff((array)$this->data->entity, $this->original_entity);
+    if (isset($this->data->members)) {
+      $data["members"] = $this->data->members;
+    }
+    if ($this->file) {
+      $response = Gallery3_Helper::request("put", $this->url, $this->token, $data, $this->file);
+    } else {
+      $response = Gallery3_Helper::request("put", $this->url, $this->token, $data);
+    }
     return $this->load();
   }
 

client/example.php

@@ -39,13 +39,19 @@ for ($i = 0; $i < 2; $i++) {
     ->set("type", "photo")
     ->set("name", "Sample Photo.png")
     ->set("title", "Sample Photo")
-    ->set_file("gallery.png")
+    ->set_file("test1.png")
     ->create($album->url, $auth);
   alert("Uploaded photo: <b>{$photo->url}</b>");
 }
 $album->load();
 alert("Album members: <b>" . join(", ", $album->data->members) . "</b>");
 
+
+alert("Replace the data file");
+$photo->set_file("test2.png")
+  ->save();
+
+
 $comment = Gallery3::factory()
   ->set("item", $album->data->members[0])
   ->set("type", "comment")
@@ -93,7 +99,6 @@ $tag_relationship2->delete();
 $tag->load();
 alert("1 remaining tag: <b>{$tag->data->relationships->items->members[0]}</b>");
 
-
 alert("Delete the album and tag");
 $album->delete();
 $tag->delete();