[gnome-photos/wip/uajain/de_dup: 3/3] base-item: Add metadata to local resource

[Umang Jain <uajain src gnome org>]

commit 6ebb89baef4f13a11d8d678d84602bc9fb78f937
Author: Umang Jain <mailumangjain gmail com>
Date:   Fri Aug 26 05:49:32 2016 +0530

    base-item: Add metadata to local resource
    
    https://bugzilla.gnome.org/show_bug.cgi?id=770267

 src/photos-base-item.c |   86 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/photos-base-item.h |   10 +++++
 2 files changed, 96 insertions(+), 0 deletions(-)
---
diff --git a/src/photos-base-item.c b/src/photos-base-item.c
index 1e9a678..26a8016 100644
--- a/src/photos-base-item.c
+++ b/src/photos-base-item.c
@@ -2148,6 +2148,61 @@ photos_base_item_print_load (GObject *source_object, GAsyncResult *res, gpointer
 
 
 static void
+photos_base_item_add_metadata_in_thread_func (GTask *task,
+                                              gpointer source_object,
+                                              gpointer task_data,
+                                              GCancellable *cancellable)
+{
+  PhotosBaseItem *item = PHOTOS_BASE_ITEM (source_object);
+  GExiv2Metadata *meta;
+  GFile *file;
+  const gchar *tag;
+  const gchar *uri;
+  const gchar *mime_type;
+  gchar *path;
+  gchar *id;
+  GError *error = NULL;
+
+  mime_type = photos_base_item_get_mime_type (item);
+  if ((g_strcmp0 (mime_type, "image/png") == 0) ||
+      (g_strcmp0 (mime_type, "image/jpeg") == 0)||
+      (g_strcmp0 (mime_type, "image/jpg") == 0))
+    {
+      meta = gexiv2_metadata_new ();
+
+      /*Can we do something better to get path ?*/
+      uri = photos_base_item_get_uri (item);
+      file = g_file_new_for_uri (uri);
+      path = g_file_get_path (file);
+      gexiv2_metadata_open_path (meta, path, &error);
+      if (error != NULL)
+        goto out;
+      else
+        {
+          tag = (const gchar *) g_object_get_data (G_OBJECT (item), "tag");
+          id = (gchar *) task_data;
+
+          if (gexiv2_metadata_has_tag (meta, tag))
+            gexiv2_metadata_clear_tag (meta, tag);
+
+         gexiv2_metadata_set_tag_string (meta, tag, id);
+          gexiv2_metadata_save_file (meta, path, &error);
+
+          if (error)
+           goto out;
+          }
+      g_print("Metadata embedded successfully\n");
+    }
+
+out:
+  gexiv2_metadata_free (meta);
+  g_free (path);
+  g_free (id);
+  g_object_unref (file);
+}
+
+
+static void
 photos_base_item_constructed (GObject *object)
 {
   PhotosBaseItem *self = PHOTOS_BASE_ITEM (object);
@@ -3596,3 +3651,34 @@ photos_base_item_trash (PhotosBaseItem *self)
   photos_delete_item_job_run (job, NULL, NULL, NULL);
   g_object_unref (job);
 }
+
+
+gboolean
+photos_base_item_add_metadata_finish (PhotosBaseItem *self, GAsyncResult *res, GError **error)
+{
+  GTask *task = G_TASK (res);
+
+  g_return_val_if_fail (g_task_is_valid (res, self), FALSE);
+  g_return_val_if_fail (g_task_get_source_tag (task) == photos_base_item_add_metadata_async, FALSE);
+  g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
+
+  return g_task_propagate_boolean (task, error);
+}
+
+
+void
+photos_base_item_add_metadata_async (PhotosBaseItem *self,
+                                     gchar *id,
+                                     GCancellable *cancellable,
+                                     GAsyncReadyCallback callback,
+                                     gpointer user_data)
+{
+  GTask *task;
+
+  task = g_task_new (self, cancellable, callback, user_data);
+  g_task_set_source_tag (task, photos_base_item_add_metadata_async);
+  g_task_set_task_data (task, id, g_free);
+
+  g_task_run_in_thread (task, photos_base_item_add_metadata_in_thread_func);
+  g_object_unref (task);
+}
diff --git a/src/photos-base-item.h b/src/photos-base-item.h
index 55b7f19..5021535 100644
--- a/src/photos-base-item.h
+++ b/src/photos-base-item.h
@@ -100,6 +100,16 @@ struct _PhotosBaseItemClass
 
 GType               photos_base_item_get_type                (void) G_GNUC_CONST;
 
+void                photos_base_item_add_metadata_async       (PhotosBaseItem *self,
+                                                               gchar *id,
+                                                               GCancellable *cancellable,
+                                                               GAsyncReadyCallback callback,
+                                                               gpointer user_data);
+
+gboolean            photos_base_item_add_metadata_finish      (PhotosBaseItem *self,
+                                                               GAsyncResult *res,
+                                                               GError **error);
+
 gboolean            photos_base_item_can_edit                (PhotosBaseItem *self);
 
 gboolean            photos_base_item_can_trash               (PhotosBaseItem *self);