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[gnome-photos/wip/rishi/buffer-decoder: 2/10] Make photos_base_item_download return a GFile instead of a path

commit eb56a4f36ee796357de678a164915851dcf0e9ff
Author: Debarshi Ray <debarshir gnome org>
Date:   Thu Sep 6 09:58:37 2018 +0200

    Make photos_base_item_download return a GFile instead of a path
    
    It's prudent to standardize around GFile because being a reference
    counted object it's cheaper to pass around, and is a better fit for
    the new codec API for GeglBuffer.
    
    https://gitlab.gnome.org/GNOME/gnome-photos/issues/63

 src/photos-base-item.c         | 29 +++++++++++++++++++----------
 src/photos-base-item.h         |  8 ++++----
 src/photos-device-item.c       |  2 +-
 src/photos-dlna-renderer.c     | 12 +++++++++---
 src/photos-facebook-item.c     | 10 +++++-----
 src/photos-flickr-item.c       |  6 +++---
 src/photos-google-item.c       |  9 ++++-----
 src/photos-local-item.c        | 16 +++++++++-------
 src/photos-media-server-item.c |  6 +++---
 9 files changed, 57 insertions(+), 41 deletions(-)
---
diff --git a/src/photos-base-item.c b/src/photos-base-item.c
index 7da07df9..d605634f 100644
--- a/src/photos-base-item.c
+++ b/src/photos-base-item.c
@@ -1049,12 +1049,12 @@ photos_base_item_download_in_thread_func (GTask *task,
                                           GCancellable *cancellable)
 {
   PhotosBaseItem *self = PHOTOS_BASE_ITEM (source_object);
-  g_autofree gchar *path = NULL;
+  g_autoptr (GFile) file = NULL;
 
   {
     g_autoptr (GError) error = NULL;
 
-    path = photos_base_item_download (self, cancellable, &error);
+    file = photos_base_item_download (self, cancellable, &error);
     if (error != NULL)
       {
         g_task_return_error (task, g_steal_pointer (&error));
@@ -1062,7 +1062,7 @@ photos_base_item_download_in_thread_func (GTask *task,
       }
   }
 
-  g_task_return_pointer (task, g_strdup (path), g_free);
+  g_task_return_pointer (task, g_object_ref (file), g_object_unref);
 
  out:
   return;
@@ -1461,6 +1461,7 @@ static GeglBuffer *
 photos_base_item_load_buffer (PhotosBaseItem *self, GCancellable *cancellable, GError **error)
 {
   PhotosBaseItemPrivate *priv;
+  g_autoptr (GFile) file = NULL;
   g_autoptr (GeglBuffer) buffer = NULL;
   GeglBuffer *ret_val = NULL;
   GeglNode *buffer_sink;
@@ -1472,10 +1473,12 @@ photos_base_item_load_buffer (PhotosBaseItem *self, GCancellable *cancellable, G
 
   priv = photos_base_item_get_instance_private (self);
 
-  path = photos_base_item_download (self, cancellable, error);
-  if (path == NULL)
+  file = photos_base_item_download (self, cancellable, error);
+  if (file == NULL)
     goto out;
 
+  path = g_file_get_path (file);
+
   graph = gegl_node_new ();
   load = gegl_node_new_child (graph, "operation", "gegl:load", "path", path, NULL);
   buffer_sink = gegl_node_new_child (graph, "operation", "gegl:buffer-sink", "buffer", &buffer, NULL);
@@ -1954,6 +1957,7 @@ photos_base_item_save_metadata_in_thread_func (GTask *task,
   PhotosBaseItem *self = PHOTOS_BASE_ITEM (source_object);
   PhotosBaseItemPrivate *priv;
   GFile *export_file = G_FILE (task_data);
+  g_autoptr (GFile) source_file = NULL;
   g_autoptr (GExiv2Metadata) metadata = NULL;
   g_autofree gchar *export_path = NULL;
   g_autofree gchar *source_path = NULL;
@@ -1965,7 +1969,7 @@ photos_base_item_save_metadata_in_thread_func (GTask *task,
   {
     g_autoptr (GError) error = NULL;
 
-    source_path = photos_base_item_download (self, cancellable, &error);
+    source_file = photos_base_item_download (self, cancellable, &error);
     if (error != NULL)
       {
         g_task_return_error (task, g_steal_pointer (&error));
@@ -1974,6 +1978,7 @@ photos_base_item_save_metadata_in_thread_func (GTask *task,
   }
 
   metadata = gexiv2_metadata_new ();
+  source_path = g_file_get_path (source_file);
 
   {
     g_autoptr (GError) error = NULL;
@@ -3343,19 +3348,23 @@ photos_base_item_destroy (PhotosBaseItem *self)
 }
 
 
-gchar *
+GFile *
 photos_base_item_download (PhotosBaseItem *self, GCancellable *cancellable, GError **error)
 {
   PhotosBaseItemPrivate *priv;
-  gchar *ret_val;
+  g_autoptr (GFile) file = NULL;
+  GFile *ret_val = NULL;
 
   g_return_val_if_fail (PHOTOS_IS_BASE_ITEM (self), NULL);
   priv = photos_base_item_get_instance_private (self);
 
   g_mutex_lock (&priv->mutex_download);
-  ret_val = PHOTOS_BASE_ITEM_GET_CLASS (self)->download (self, cancellable, error);
+  file = PHOTOS_BASE_ITEM_GET_CLASS (self)->download (self, cancellable, error);
   g_mutex_unlock (&priv->mutex_download);
 
+  g_return_val_if_fail (g_file_is_native (file), NULL);
+  ret_val = g_object_ref (file);
+
   return ret_val;
 }
 
@@ -3377,7 +3386,7 @@ photos_base_item_download_async (PhotosBaseItem *self,
 }
 
 
-gchar *
+GFile *
 photos_base_item_download_finish (PhotosBaseItem *self, GAsyncResult *res, GError **error)
 {
   GTask *task;
diff --git a/src/photos-base-item.h b/src/photos-base-item.h
index c889ee16..864cdddc 100644
--- a/src/photos-base-item.h
+++ b/src/photos-base-item.h
@@ -1,7 +1,7 @@
 /*
  * Photos - access, organize and share your photos on GNOME
  * Copyright © 2014 Pranav Kant
- * Copyright © 2012 – 2017 Red Hat, Inc.
+ * Copyright © 2012 – 2018 Red Hat, Inc.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -60,7 +60,7 @@ struct _PhotosBaseItemClass
   GStrv       (*create_pipeline_paths)      (PhotosBaseItem *self);
   gboolean    (*create_thumbnail)           (PhotosBaseItem *self, GCancellable *cancellable, GError 
**error);
   gchar      *(*create_thumbnail_path)      (PhotosBaseItem *self);
-  gchar      *(*download)                   (PhotosBaseItem *self, GCancellable *cancellable, GError 
**error);
+  GFile      *(*download)                   (PhotosBaseItem *self, GCancellable *cancellable, GError 
**error);
   GtkWidget  *(*get_source_widget)          (PhotosBaseItem *self);
   gboolean    (*metadata_add_shared)        (PhotosBaseItem  *self,
                                              const gchar     *provider_type,
@@ -95,7 +95,7 @@ gchar              *photos_base_item_create_thumbnail_path   (PhotosBaseItem *se
 
 void                photos_base_item_destroy                 (PhotosBaseItem *self);
 
-gchar              *photos_base_item_download                (PhotosBaseItem *self,
+GFile              *photos_base_item_download                (PhotosBaseItem *self,
                                                               GCancellable *cancellable,
                                                               GError **error);
 
@@ -104,7 +104,7 @@ void                photos_base_item_download_async          (PhotosBaseItem *se
                                                               GAsyncReadyCallback callback,
                                                               gpointer user_data);
 
-gchar              *photos_base_item_download_finish         (PhotosBaseItem *self,
+GFile              *photos_base_item_download_finish         (PhotosBaseItem *self,
                                                               GAsyncResult *res,
                                                               GError **error);
 
diff --git a/src/photos-device-item.c b/src/photos-device-item.c
index 64129c88..8441e6fe 100644
--- a/src/photos-device-item.c
+++ b/src/photos-device-item.c
@@ -302,7 +302,7 @@ photos_device_item_create_thumbnail_path (PhotosBaseItem *item)
 }
 
 
-static gchar *
+static GFile *
 photos_device_item_download (PhotosBaseItem *item, GCancellable *cancellable, GError **error)
 {
   g_assert_not_reached ();
diff --git a/src/photos-dlna-renderer.c b/src/photos-dlna-renderer.c
index 2fbae0bf..3beea43a 100644
--- a/src/photos-dlna-renderer.c
+++ b/src/photos-dlna-renderer.c
@@ -1,7 +1,7 @@
 /*
  * Photos - access, organize and share your photos on GNOME
  * Copyright © 2013 Intel Corporation. All rights reserved.
- * Copyright © 2013 – 2017 Red Hat, Inc.
+ * Copyright © 2013 – 2018 Red Hat, Inc.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -431,13 +431,14 @@ photos_dlna_renderer_share_download_cb (GObject *source_object,
 {
   PhotosDlnaRenderer *self;
   GError *error;
+  GFile *file = NULL;
   GTask *task = G_TASK (user_data);
   gchar *filename;
 
   self = PHOTOS_DLNA_RENDERER (g_task_get_source_object (task));
 
   error = NULL;
-  filename = photos_base_item_download_finish (PHOTOS_BASE_ITEM (source_object), res, &error);
+  file = photos_base_item_download_finish (PHOTOS_BASE_ITEM (source_object), res, &error);
   RETURN_ON_ERROR (task, error, "Unable to extract the local filename for the shared item");
 
   /* This will call a sequence of DBus methods to send the item to the DMR:
@@ -451,12 +452,14 @@ photos_dlna_renderer_share_download_cb (GObject *source_object,
    */
 
   /* 1) DleynaRenderer.PushHost.HostFile() */
+  filename = g_file_get_path (file);
   dleyna_renderer_push_host_call_host_file (self->push_host,
                                             filename,
                                             g_task_get_cancellable (task),
                                             photos_dlna_renderer_share_host_file_cb,
                                             task);
   g_free (filename);
+  g_object_unref (file);
 }
 
 
@@ -539,21 +542,24 @@ photos_dlna_renderer_unshare_download_cb (GObject *source_object,
 {
   PhotosDlnaRenderer *self;
   GError *error;
+  GFile *file = NULL;
   GTask *task = G_TASK (user_data);
   gchar *filename;
 
   self = PHOTOS_DLNA_RENDERER (g_task_get_source_object (task));
 
   error = NULL;
-  filename = photos_base_item_download_finish (PHOTOS_BASE_ITEM (source_object), res, &error);
+  file = photos_base_item_download_finish (PHOTOS_BASE_ITEM (source_object), res, &error);
   RETURN_ON_ERROR (task, error, "Unable to extract the local filename for the shared item");
 
+  filename = g_file_get_path (file);
   dleyna_renderer_push_host_call_remove_file (self->push_host,
                                               filename,
                                               g_task_get_cancellable (task),
                                               photos_dlna_renderer_unshare_remove_file_cb,
                                               task);
   g_free (filename);
+  g_object_unref (file);
 }
 
 
diff --git a/src/photos-facebook-item.c b/src/photos-facebook-item.c
index 33c9efc0..980775a8 100644
--- a/src/photos-facebook-item.c
+++ b/src/photos-facebook-item.c
@@ -1,7 +1,7 @@
 /*
  * Photos - access, organize and share your photos on GNOME
  * Copyright © 2013 Álvaro Peña
- * Copyright © 2014 – 2017 Red Hat, Inc.
+ * Copyright © 2014 – 2018 Red Hat, Inc.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -190,9 +190,10 @@ photos_facebook_item_create_thumbnail (PhotosBaseItem *item, GCancellable *cance
 }
 
 
-static gchar *
+static GFile *
 photos_facebook_item_download (PhotosBaseItem *item, GCancellable *cancellable, GError **error)
 {
+  GFile *ret_val = NULL;
   g_autoptr (GFile) local_file = NULL;
   g_autoptr (GFile) remote_file = NULL;
   GFBGraphPhoto *photo = NULL; /* TODO: use g_autoptr */
@@ -201,7 +202,6 @@ photos_facebook_item_download (PhotosBaseItem *item, GCancellable *cancellable,
   const gchar *local_filename;
   g_autofree gchar *local_dir = NULL;
   g_autofree gchar *local_path = NULL;
-  gchar *ret_val = NULL;
 
   cache_dir = g_get_user_cache_dir ();
   local_dir = g_build_filename (cache_dir, PACKAGE_TARNAME, "facebook", NULL);
@@ -209,6 +209,7 @@ photos_facebook_item_download (PhotosBaseItem *item, GCancellable *cancellable,
 
   local_filename = photos_base_item_get_filename (item);
   local_path = g_build_filename (local_dir, local_filename, NULL);
+  local_file = g_file_new_for_path (local_path);
   if (g_file_test (local_path, G_FILE_TEST_EXISTS))
     goto end;
 
@@ -224,7 +225,6 @@ photos_facebook_item_download (PhotosBaseItem *item, GCancellable *cancellable,
     }
 
   remote_file = g_file_new_for_uri (higher_image->source);
-  local_file = g_file_new_for_path (local_path);
 
   photos_debug (PHOTOS_DEBUG_NETWORK, "Downloading %s from Facebook to %s", higher_image->source, 
local_path);
   if (!g_file_copy (remote_file,
@@ -240,7 +240,7 @@ photos_facebook_item_download (PhotosBaseItem *item, GCancellable *cancellable,
     }
 
  end:
-  ret_val = g_steal_pointer (&local_path);
+  ret_val = g_object_ref (local_file);
 
  out:
   g_clear_object (&photo);
diff --git a/src/photos-flickr-item.c b/src/photos-flickr-item.c
index 3f5d478c..7b344a7c 100644
--- a/src/photos-flickr-item.c
+++ b/src/photos-flickr-item.c
@@ -258,9 +258,10 @@ photos_flickr_item_create_thumbnail (PhotosBaseItem *item, GCancellable *cancell
 }
 
 
-static gchar *
+static GFile *
 photos_flickr_item_download (PhotosBaseItem *item, GCancellable *cancellable, GError **error)
 {
+  GFile *ret_val = NULL;
   g_autoptr (GFile) local_file = NULL;
   g_autoptr (GFile) remote_file = NULL;
   const gchar *cache_dir;
@@ -268,7 +269,6 @@ photos_flickr_item_download (PhotosBaseItem *item, GCancellable *cancellable, GE
   const gchar *uri;
   g_autofree gchar *local_dir = NULL;
   g_autofree gchar *local_path = NULL;
-  gchar *ret_val = NULL;
 
   uri = photos_base_item_get_uri (item);
   remote_file = g_file_new_for_uri (uri);
@@ -297,7 +297,7 @@ photos_flickr_item_download (PhotosBaseItem *item, GCancellable *cancellable, GE
         }
     }
 
-  ret_val = g_steal_pointer (&local_path);
+  ret_val = g_object_ref (local_file);
 
  out:
   return ret_val;
diff --git a/src/photos-google-item.c b/src/photos-google-item.c
index faf7104a..718ee346 100644
--- a/src/photos-google-item.c
+++ b/src/photos-google-item.c
@@ -219,18 +219,18 @@ photos_google_item_create_thumbnail (PhotosBaseItem *item, GCancellable *cancell
 }
 
 
-static gchar *
+static GFile *
 photos_google_item_download (PhotosBaseItem *item, GCancellable *cancellable, GError **error)
 {
   GDataEntry *entry = NULL;
   GFile *local_file = NULL;
   GFile *remote_file = NULL;
+  GFile *ret_val = NULL;
   const gchar *cache_dir;
   const gchar *local_filename;
   const gchar *uri;
   gchar *local_dir = NULL;
   gchar *local_path = NULL;
-  gchar *ret_val = NULL;
 
   cache_dir = g_get_user_cache_dir ();
   local_dir = g_build_filename (cache_dir, PACKAGE_TARNAME, "google", NULL);
@@ -238,6 +238,7 @@ photos_google_item_download (PhotosBaseItem *item, GCancellable *cancellable, GE
 
   local_filename = photos_base_item_get_filename (item);
   local_path = g_build_filename (local_dir, local_filename, NULL);
+  local_file = g_file_new_for_path (local_path);
   if (g_file_test (local_path, G_FILE_TEST_EXISTS))
     goto end;
 
@@ -247,7 +248,6 @@ photos_google_item_download (PhotosBaseItem *item, GCancellable *cancellable, GE
 
   uri = gdata_entry_get_content_uri (entry);
   remote_file = g_file_new_for_uri (uri);
-  local_file = g_file_new_for_path (local_path);
 
   photos_debug (PHOTOS_DEBUG_NETWORK, "Downloading %s from Google to %s", uri, local_path);
   if (!g_file_copy (remote_file,
@@ -263,8 +263,7 @@ photos_google_item_download (PhotosBaseItem *item, GCancellable *cancellable, GE
     }
 
  end:
-  ret_val = local_path;
-  local_path = NULL;
+  ret_val = g_object_ref (local_file);
 
  out:
   g_free (local_path);
diff --git a/src/photos-local-item.c b/src/photos-local-item.c
index 042e9349..9e0f5364 100644
--- a/src/photos-local-item.c
+++ b/src/photos-local-item.c
@@ -1,7 +1,7 @@
 /*
  * Photos - access, organize and share your photos on GNOME
  * Copyright © 2014 Pranav Kant
- * Copyright © 2012 – 2017 Red Hat, Inc.
+ * Copyright © 2012 – 2018 Red Hat, Inc.
  * Copyright © 2016 Umang Jain
  *
  * This program is free software: you can redistribute it and/or modify
@@ -217,15 +217,15 @@ photos_local_item_create_thumbnail (PhotosBaseItem *item, GCancellable *cancella
 }
 
 
-static gchar *
+static GFile *
 photos_local_item_download (PhotosBaseItem *item, GCancellable *cancellable, GError **error)
 {
+  GFile *file;
   const gchar *uri;
-  gchar *path;
 
   uri = photos_base_item_get_uri (item);
-  path = g_filename_from_uri (uri, NULL, error);
-  return path;
+  file = g_file_new_for_uri (uri);
+  return file;
 }
 
 
@@ -279,6 +279,7 @@ photos_local_item_metadata_add_shared (PhotosBaseItem  *item,
                                        GCancellable    *cancellable,
                                        GError         **error)
 {
+  g_autoptr (GFile) file = NULL;
   g_autoptr (GVariant) shared_variant = NULL;
   const GVariantType *tuple_items[] =
     {
@@ -305,11 +306,12 @@ photos_local_item_metadata_add_shared (PhotosBaseItem  *item,
       goto out;
     }
 
-  path = photos_base_item_download (item, cancellable, error);
-  if (path == NULL)
+  file = photos_base_item_download (item, cancellable, error);
+  if (file == NULL)
     goto out;
 
   metadata = gexiv2_metadata_new ();
+  path = g_file_get_path (file);
 
   if (!gexiv2_metadata_open_path (metadata, path, error))
     goto out;
diff --git a/src/photos-media-server-item.c b/src/photos-media-server-item.c
index 029a2b51..1668d4dc 100644
--- a/src/photos-media-server-item.c
+++ b/src/photos-media-server-item.c
@@ -112,9 +112,10 @@ photos_media_server_item_create_thumbnail (PhotosBaseItem *item, GCancellable *c
 }
 
 
-static gchar *
+static GFile *
 photos_media_server_item_download (PhotosBaseItem *item, GCancellable *cancellable, GError **error)
 {
+  GFile *ret_val = NULL;
   g_autoptr (GFile) local_file = NULL;
   g_autoptr (GFile) remote_file = NULL;
   const gchar *cache_dir;
@@ -122,7 +123,6 @@ photos_media_server_item_download (PhotosBaseItem *item, GCancellable *cancellab
   g_autofree gchar *local_dir = NULL;
   g_autofree gchar *local_filename = NULL;
   g_autofree gchar *local_path = NULL;
-  gchar *ret_val = NULL;
 
   uri = photos_base_item_get_uri (item);
   remote_file = g_file_new_for_uri (uri);
@@ -151,7 +151,7 @@ photos_media_server_item_download (PhotosBaseItem *item, GCancellable *cancellab
         }
     }
 
-  ret_val = g_steal_pointer (&local_path);
+  ret_val = g_object_ref (local_file);
 
  out:
   return ret_val;
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