[gnome-photos] base-item: Make trash a virtual method and implement it for local items

[Debarshi Ray <debarshir src gnome org>]

commit 7396428065feadbeb1d33ab25e5179fc8c748c38
Author: Pranav Kant <pranav913 gmail com>
Date:   Mon Jul 21 16:50:37 2014 +0200

    base-item: Make trash a virtual method and implement it for local items
    
    One can use can_trash to find out whether a PhotosBaseItem sub-class
    implements it or not. As a positive side-effect, can_trash is no longer
    TRUE for remote collections.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=720222

 src/photos-base-item.c  |    9 ++++-----
 src/photos-base-item.h  |    2 ++
 src/photos-local-item.c |   39 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 45 insertions(+), 5 deletions(-)
---
diff --git a/src/photos-base-item.c b/src/photos-base-item.c
index 5a900de..3121130 100644
--- a/src/photos-base-item.c
+++ b/src/photos-base-item.c
@@ -1,5 +1,6 @@
 /*
  * Photos - access, organize and share your photos on GNOME
+ * Copyright © 2014 Pranav Kant
  * Copyright © 2012, 2013, 2014 Red Hat, Inc.
  *
  * This program is free software; you can redistribute it and/or
@@ -1046,7 +1047,7 @@ photos_base_item_filterable_iface_init (PhotosFilterableInterface *iface)
 gboolean
 photos_base_item_can_trash (PhotosBaseItem *self)
 {
-  return self->priv->collection;
+  return PHOTOS_BASE_ITEM_GET_CLASS (self)->trash != NULL;
 }
 
 
@@ -1376,13 +1377,11 @@ photos_base_item_set_favorite (PhotosBaseItem *self, gboolean favorite)
 void
 photos_base_item_trash (PhotosBaseItem *self)
 {
-  PhotosBaseItemPrivate *priv = self->priv;
   PhotosDeleteItemJob *job;
 
-  if (!priv->collection)
-    return;
+  PHOTOS_BASE_ITEM_GET_CLASS (self)->trash (self);
 
-  job = photos_delete_item_job_new (priv->id);
+  job = photos_delete_item_job_new (self->priv->id);
   photos_delete_item_job_run (job, NULL, NULL);
   g_object_unref (job);
 }
diff --git a/src/photos-base-item.h b/src/photos-base-item.h
index 65d1d44..ba6731c 100644
--- a/src/photos-base-item.h
+++ b/src/photos-base-item.h
@@ -1,5 +1,6 @@
 /*
  * Photos - access, organize and share your photos on GNOME
+ * Copyright © 2014 Pranav Kant
  * Copyright © 2012, 2013, 2014 Red Hat, Inc.
  *
  * This program is free software; you can redistribute it and/or
@@ -74,6 +75,7 @@ struct _PhotosBaseItemClass
   GtkWidget *(*get_source_widget) (PhotosBaseItem *self);
   void (*open) (PhotosBaseItem *self, GdkScreen *screen, guint32 timestamp);
   void (*set_favorite) (PhotosBaseItem *self, gboolean favorite);
+  void (*trash) (PhotosBaseItem *self);
   void (*update_type_description) (PhotosBaseItem *self);
 
   /* signals */
diff --git a/src/photos-local-item.c b/src/photos-local-item.c
index 013c8b4..3af4b5d 100644
--- a/src/photos-local-item.c
+++ b/src/photos-local-item.c
@@ -1,5 +1,6 @@
 /*
  * Photos - access, organize and share your photos on GNOME
+ * Copyright © 2014 Pranav Kant
  * Copyright © 2012, 2013, 2014 Red Hat, Inc.
  *
  * This program is free software; you can redistribute it and/or
@@ -41,6 +42,28 @@ G_DEFINE_TYPE_WITH_CODE (PhotosLocalItem, photos_local_item, PHOTOS_TYPE_BASE_IT
                                                          0));
 
 
+static void
+photos_local_item_delete (GObject *source_object, GAsyncResult *res, gpointer user_data)
+{
+  PhotosLocalItem *self = PHOTOS_LOCAL_ITEM (user_data);
+  GError *error;
+  GFile *file = G_FILE (source_object);
+
+  error = NULL;
+  g_file_delete_finish (file, res, &error);
+  if (error != NULL)
+    {
+      const gchar *uri;
+
+      uri = photos_base_item_get_uri (PHOTOS_BASE_ITEM (self));
+      g_warning ("Unable to delete %s: %s", uri, error->message);
+      g_error_free (error);
+    }
+
+  g_object_unref (self);
+}
+
+
 static gboolean
 photos_local_item_create_thumbnail (PhotosBaseItem *item, GCancellable *cancellable, GError **error)
 {
@@ -109,6 +132,21 @@ photos_local_item_get_source_widget (PhotosBaseItem *item)
 
 
 static void
+photos_local_item_trash (PhotosBaseItem *item)
+{
+  GFile *file;
+  const gchar *uri;
+
+  uri = photos_base_item_get_uri (item);
+  file = g_file_new_for_uri (uri);
+  g_file_delete_async (file, G_PRIORITY_DEFAULT, NULL, photos_local_item_delete, g_object_ref (item));
+
+  g_object_unref (file);
+
+}
+
+
+static void
 photos_local_item_constructed (GObject *object)
 {
   PhotosLocalItem *self = PHOTOS_LOCAL_ITEM (object);
@@ -149,4 +187,5 @@ photos_local_item_class_init (PhotosLocalItemClass *class)
   base_item_class->create_thumbnail = photos_local_item_create_thumbnail;
   base_item_class->download = photos_local_item_download;
   base_item_class->get_source_widget = photos_local_item_get_source_widget;
+  base_item_class->trash = photos_local_item_trash;
 }