[gnome-photos] base-item: Adjust the extension when exporting

[Debarshi Ray <debarshir src gnome org>]

commit ff3c7d076706907fc55952121454e4e712e56e79
Author: Debarshi Ray <debarshir gnome org>
Date:   Wed Oct 5 11:17:48 2016 +0200

    base-item: Adjust the extension when exporting
    
    We export PNGs as PNGs, and anything else is converted to JPEG.
    Therefore, we should ensure that the extension matches the exported
    content type.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=772443

 src/photos-base-item.c |   11 ++++++++++-
 1 files changed, 10 insertions(+), 1 deletions(-)
---
diff --git a/src/photos-base-item.c b/src/photos-base-item.c
index ca804ee..72225c5 100644
--- a/src/photos-base-item.c
+++ b/src/photos-base-item.c
@@ -1746,6 +1746,9 @@ photos_base_item_save_buffer_zoom (GObject *source_object, GAsyncResult *res, gp
   GeglBuffer *buffer = GEGL_BUFFER (source_object);
   GeglBuffer *buffer_zoomed = NULL;
   PhotosBaseItemSaveData *data;
+  const gchar *extension;
+  gchar *basename = NULL;
+  gchar *filename = NULL;
 
   self = PHOTOS_BASE_ITEM (g_task_get_source_object (task));
   priv = photos_base_item_get_instance_private (self);
@@ -1764,7 +1767,11 @@ photos_base_item_save_buffer_zoom (GObject *source_object, GAsyncResult *res, gp
   g_assert_null (data->buffer);
   data->buffer = g_object_ref (buffer_zoomed);
 
-  file = g_file_get_child (data->dir, priv->filename);
+  basename = photos_utils_filename_strip_extension (priv->filename);
+  extension = g_strcmp0 (priv->mime_type, "image/png") == 0 ? ".png" : ".jpg";
+  filename = g_strconcat (basename, extension, NULL);
+
+  file = g_file_get_child (data->dir, filename);
   photos_utils_file_create_async (file,
                                   G_FILE_CREATE_NONE,
                                   G_PRIORITY_DEFAULT,
@@ -1773,6 +1780,8 @@ photos_base_item_save_buffer_zoom (GObject *source_object, GAsyncResult *res, gp
                                   g_object_ref (task));
 
  out:
+  g_free (basename);
+  g_free (filename);
   g_clear_object (&buffer_zoomed);
   g_clear_object (&file);
   g_object_unref (task);