[gnome-photos] Add PhotosGoogleItem

[Debarshi Ray <debarshir src gnome org>]

commit a581f73b17edf4522d70db6d99cb47ae22751a0f
Author: Saurav Agarwalla <saurav agarwalla92 gmail com>
Date:   Thu Jul 24 20:55:24 2014 +0530

    Add PhotosGoogleItem
    
    https://bugzilla.gnome.org/show_bug.cgi?id=711563

 configure.ac             |    2 +
 src/Makefile.am          |    4 +
 src/photos-application.c |   12 ++
 src/photos-google-item.c |  311 ++++++++++++++++++++++++++++++++++++++++++++++
 src/photos-google-item.h |   73 +++++++++++
 src/photos-utils.c       |    6 +-
 6 files changed, 407 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index b7582e8..8d62e1d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -25,6 +25,7 @@ AC_SUBST(LIBM)
 GLIB_GSETTINGS
 
 EXEMPI_MIN_VERSION=1.99.5
+GDATA_MIN_VERSION=0.15.2
 GFBGRAPH_MIN_VERSION=0.2.1
 GLIB_MIN_VERSION=2.39.3
 GOA_MIN_VERSION=3.8.0
@@ -86,6 +87,7 @@ AC_DEFINE([HAVE_CAIRO_GOBJECT], [], [We want gegl-gtk to use the cairo-gobject c
 
 PKG_CHECK_MODULES(EXEMPI, [exempi-2.0 >= $EXEMPI_MIN_VERSION])
 PKG_CHECK_MODULES(GFBGRAPH, [libgfbgraph-0.2 >= $GFBGRAPH_MIN_VERSION])
+PKG_CHECK_MODULES(GDATA, [libgdata >= $GDATA_MIN_VERSION])
 PKG_CHECK_MODULES(GEGL, [gegl-0.2])
 PKG_CHECK_MODULES(GDK_PIXBUF, [gdk-pixbuf-2.0])
 PKG_CHECK_MODULES(GLIB, [glib-2.0 >= $GLIB_MIN_VERSION])
diff --git a/src/Makefile.am b/src/Makefile.am
index 8a04c55..30f6eaf 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -118,6 +118,8 @@ gnome_photos_SOURCES = \
        photos-filterable.h \
        photos-flickr-item.c \
        photos-flickr-item.h \
+       photos-google-item.c \
+       photos-google-item.h \
        photos-header-bar.c \
        photos-header-bar.h \
        photos-icons.h \
@@ -266,6 +268,7 @@ AM_CPPFLAGS = \
        $(BABL_CFLAGS) \
        $(CAIRO_CFLAGS) \
        $(EXEMPI_CFLAGS) \
+       $(GDATA_CFLAGS) \
        $(GDK_PIXBUF_CFLAGS) \
        $(GFBGRAPH_CFLAGS) \
        $(GEGL_CFLAGS) \
@@ -293,6 +296,7 @@ gnome_photos_LDADD = \
        $(BABL_LIBS) \
        $(CAIRO_LIBS) \
        $(EXEMPI_LIBS) \
+       $(GDATA_LIBS) \
        $(GDK_PIXBUF_LIBS) \
        $(GFBGRAPH_LIBS) \
        $(GEGL_LIBS) \
diff --git a/src/photos-application.c b/src/photos-application.c
index 57e465b..993d543 100644
--- a/src/photos-application.c
+++ b/src/photos-application.c
@@ -72,6 +72,7 @@ struct _PhotosApplicationPrivate
   GSimpleAction *remote_display_action;
   GomMiner *facebook_miner;
   GomMiner *flickr_miner;
+  GomMiner *google_miner;
   GtkWidget *main_window;
   PhotosBaseManager *item_mngr;
   PhotosCameraCache *camera_cache;
@@ -455,6 +456,9 @@ photos_application_refresh_miners (PhotosApplication *self)
 
   if (photos_source_manager_has_provider_type (PHOTOS_SOURCE_MANAGER (priv->state->src_mngr), "flickr"))
     photos_application_refresh_miner_now (self, priv->flickr_miner);
+
+  if (photos_source_manager_has_provider_type (PHOTOS_SOURCE_MANAGER (priv->state->src_mngr), "google"))
+    photos_application_refresh_miner_now (self, priv->google_miner);
 }
 
 
@@ -821,6 +825,13 @@ photos_application_startup (GApplication *application)
                                                          NULL,
                                                          NULL);
 
+  priv->google_miner = gom_miner_proxy_new_for_bus_sync (G_BUS_TYPE_SESSION,
+                                                         G_DBUS_PROXY_FLAGS_NONE,
+                                                         "org.gnome.OnlineMiners.GData",
+                                                         "/org/gnome/OnlineMiners/GData",
+                                                         NULL,
+                                                         NULL);
+
   tracker_extract_priority_proxy_new_for_bus (G_BUS_TYPE_SESSION,
                                               G_DBUS_PROXY_FLAGS_NONE,
                                               "org.freedesktop.Tracker1.Miner.Extract",
@@ -958,6 +969,7 @@ photos_application_dispose (GObject *object)
   g_clear_object (&priv->set_bg_action);
   g_clear_object (&priv->facebook_miner);
   g_clear_object (&priv->flickr_miner);
+  g_clear_object (&priv->google_miner);
   g_clear_object (&priv->item_mngr);
   g_clear_object (&priv->camera_cache);
   g_clear_object (&priv->mode_cntrlr);
diff --git a/src/photos-google-item.c b/src/photos-google-item.c
new file mode 100644
index 0000000..d585a7e
--- /dev/null
+++ b/src/photos-google-item.c
@@ -0,0 +1,311 @@
+/*
+ * Photos - access, organize and share your photos on GNOME
+ * Copyright © 2014 Saurav Agarwalla
+ *
+ * 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 the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+/* Based on code from:
+ *   + Documents
+ */
+
+
+#include "config.h"
+
+#include <gdata/gdata.h>
+#include <gio/gio.h>
+#include <glib.h>
+#include <libgnome-desktop/gnome-desktop-thumbnail.h>
+
+#include "photos-base-manager.h"
+#include "photos-google-item.h"
+#include "photos-search-context.h"
+#include "photos-source.h"
+#include "photos-utils.h"
+
+
+struct _PhotosGoogleItemPrivate
+{
+  PhotosBaseManager *src_mngr;
+};
+
+
+G_DEFINE_TYPE_WITH_CODE (PhotosGoogleItem, photos_google_item, PHOTOS_TYPE_BASE_ITEM,
+                         G_ADD_PRIVATE (PhotosGoogleItem)
+                         photos_utils_ensure_extension_points ();
+                         g_io_extension_point_implement (PHOTOS_BASE_ITEM_EXTENSION_POINT_NAME,
+                                                         g_define_type_id,
+                                                         "google",
+                                                         0));
+
+
+static GDataEntry *
+photos_google_get_picasaweb_file (PhotosBaseItem *item, GCancellable *cancellable, GError **error)
+{
+  PhotosGoogleItemPrivate *priv = PHOTOS_GOOGLE_ITEM (item)->priv;
+  PhotosSource *source;
+  GDataAuthorizationDomain *authorization_domain;
+  GDataEntry *entry;
+  GDataGoaAuthorizer *authorizer;
+  GDataPicasaWebQuery *query;
+  GDataPicasaWebService *service;
+  const gchar *identifier;
+  const gchar *resource_urn;
+
+  resource_urn = photos_base_item_get_resource_urn (item);
+  source = PHOTOS_SOURCE (photos_base_manager_get_object_by_id (priv->src_mngr, resource_urn));
+  authorizer = gdata_goa_authorizer_new (photos_source_get_goa_object (source));
+  identifier = photos_base_item_get_identifier (item) + strlen ("google:picasaweb:");
+  service = gdata_picasaweb_service_new (GDATA_AUTHORIZER (authorizer));
+  authorization_domain = gdata_picasaweb_service_get_primary_authorization_domain ();
+
+  query = gdata_picasaweb_query_new (NULL);
+  gdata_picasaweb_query_set_image_size (query, "d");
+
+  entry = gdata_service_query_single_entry (GDATA_SERVICE (service),
+                                            authorization_domain,
+                                            identifier,
+                                            GDATA_QUERY (query),
+                                            GDATA_TYPE_PICASAWEB_FILE,
+                                            cancellable,
+                                            error);
+
+  g_object_unref (service);
+  g_object_unref (authorizer);
+  g_object_unref (query);
+
+  return entry;
+}
+
+
+static gboolean
+photos_google_item_create_thumbnail (PhotosBaseItem *item, GCancellable *cancellable, GError **error)
+{
+  GDataEntry *entry = NULL;
+  GList *l;
+  GList *thumbnails;
+  GDataMediaThumbnail *thumbnail = NULL;
+  gchar *local_path = NULL;
+  gchar *local_dir = NULL;
+  GFile *local_file = NULL;
+  GFile *remote_file = NULL;
+  gboolean ret_val = FALSE;
+  const gchar *thumbnail_uri;
+  const gchar *uri;
+  guint max_width = 0;
+  guint current_width;
+
+  entry = photos_google_get_picasaweb_file (item, cancellable, error);
+  if (entry == NULL)
+    goto out;
+
+  thumbnails = gdata_picasaweb_file_get_thumbnails (GDATA_PICASAWEB_FILE (entry));
+  if (thumbnails == NULL)
+    {
+      g_set_error (error, PHOTOS_ERROR, 0, "Failed to find an image for the thumbnail");
+      goto out;
+    }
+
+  for (l = thumbnails; l != NULL; l = l->next)
+    {
+      current_width = gdata_media_thumbnail_get_width (GDATA_MEDIA_THUMBNAIL (l->data));
+      if (current_width > max_width)
+        {
+          max_width = current_width;
+          thumbnail = GDATA_MEDIA_THUMBNAIL (l->data);
+        }
+    }
+
+  thumbnail_uri = gdata_media_thumbnail_get_uri (thumbnail);
+  remote_file = g_file_new_for_uri (thumbnail_uri);
+
+  uri = photos_base_item_get_uri (item);
+  local_path = gnome_desktop_thumbnail_path_for_uri (uri, GNOME_DESKTOP_THUMBNAIL_SIZE_LARGE);
+  local_file = g_file_new_for_path (local_path);
+
+  local_dir = g_path_get_dirname (local_path);
+  g_mkdir_with_parents (local_dir, 0700);
+
+  g_debug ("Downloading %s from Google to %s", thumbnail_uri, local_path);
+  if (!g_file_copy (remote_file,
+                    local_file,
+                    G_FILE_COPY_ALL_METADATA | G_FILE_COPY_OVERWRITE,
+                    cancellable,
+                    NULL,
+                    NULL,
+                    error))
+    goto out;
+
+  ret_val = TRUE;
+
+ out:
+  g_free (local_path);
+  g_free (local_dir);
+  g_clear_object (&local_file);
+  g_clear_object (&remote_file);
+  g_clear_object (&entry);
+  return ret_val;
+}
+
+
+static gchar *
+photos_google_item_download (PhotosBaseItem *item, GCancellable *cancellable, GError **error)
+{
+  GDataEntry *entry = NULL;
+  GFile *local_file = NULL;
+  GFile *remote_file = NULL;
+  const gchar *cache_dir;
+  const gchar *uri;
+  gchar *local_dir = NULL;
+  gchar *local_filename = NULL;
+  gchar *local_path = NULL;
+  gchar *ret_val = NULL;
+
+  entry = photos_google_get_picasaweb_file (item, cancellable, error);
+  if (entry == NULL)
+    goto out;
+
+  uri = gdata_entry_get_content_uri (entry);
+  remote_file = g_file_new_for_uri (uri);
+  cache_dir = g_get_user_cache_dir ();
+
+  local_dir = g_build_filename (cache_dir, PACKAGE_TARNAME, "google", NULL);
+  g_mkdir_with_parents (local_dir, 0700);
+
+  local_filename = g_file_get_basename (remote_file);
+  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))
+    {
+      g_debug ("Downloading %s from Google to %s", uri, local_path);
+      if (!g_file_copy (remote_file,
+                        local_file,
+                        G_FILE_COPY_ALL_METADATA | G_FILE_COPY_OVERWRITE,
+                        cancellable,
+                        NULL,
+                        NULL,
+                        error))
+        {
+          g_file_delete (local_file, NULL, NULL);
+          goto out;
+        }
+    }
+
+  ret_val = local_path;
+  local_path = NULL;
+
+ out:
+  g_free (local_path);
+  g_free (local_filename);
+  g_free (local_dir);
+  g_clear_object (&local_file);
+  g_clear_object (&remote_file);
+  g_clear_object (&entry);
+  return ret_val;
+}
+
+
+static GtkWidget *
+photos_google_item_get_source_widget (PhotosBaseItem *item)
+{
+  PhotosGoogleItem *self = PHOTOS_GOOGLE_ITEM (item);
+  GtkWidget *source_widget;
+  const gchar *name;
+
+  name = photos_utils_get_provider_name (self->priv->src_mngr, item);
+  source_widget = gtk_link_button_new_with_label ("https://picasaweb.google.com/";, name);
+  gtk_widget_set_halign (source_widget, GTK_ALIGN_START);
+
+  return source_widget;
+}
+
+
+/* NOTE: For private photos, opening the URI in a browser results in a
+ * 'Sorry, that page was not found.' if the user is not logged in with the respective account
+ */
+static void
+photos_google_item_open (PhotosBaseItem *item, GdkScreen *screen, guint32 timestamp)
+{
+  GError *error;
+  const gchar *google_uri;
+
+  google_uri = photos_base_item_get_uri (item);
+
+  error = NULL;
+  gtk_show_uri (screen, google_uri, timestamp, &error);
+  if (error != NULL)
+    {
+      g_warning ("Unable to show URI %s: %s", google_uri, error->message);
+      g_error_free (error);
+    }
+}
+
+
+static void
+photos_google_item_constructed (GObject *object)
+{
+  PhotosGoogleItem *self = PHOTOS_GOOGLE_ITEM (object);
+  const gchar *name;
+
+  G_OBJECT_CLASS (photos_google_item_parent_class)->constructed (object);
+
+  name = photos_utils_get_provider_name (self->priv->src_mngr, PHOTOS_BASE_ITEM (self));
+  photos_base_item_set_default_app_name (PHOTOS_BASE_ITEM (self), name);
+}
+
+
+static void
+photos_google_item_dispose (GObject *object)
+{
+  PhotosGoogleItem *self = PHOTOS_GOOGLE_ITEM (object);
+
+  g_clear_object (&self->priv->src_mngr);
+
+  G_OBJECT_CLASS (photos_google_item_parent_class)->dispose (object);
+}
+
+
+static void
+photos_google_item_init (PhotosGoogleItem *self)
+{
+  PhotosGoogleItemPrivate *priv;
+  GApplication *app;
+  PhotosSearchContextState *state;
+
+  self->priv = photos_google_item_get_instance_private (self);
+  priv = self->priv;
+
+  app = g_application_get_default ();
+  state = photos_search_context_get_state (PHOTOS_SEARCH_CONTEXT (app));
+
+  priv->src_mngr = g_object_ref (state->src_mngr);
+}
+
+
+static void
+photos_google_item_class_init (PhotosGoogleItemClass *class)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (class);
+  PhotosBaseItemClass *base_item_class = PHOTOS_BASE_ITEM_CLASS (class);
+
+  object_class->constructed = photos_google_item_constructed;
+  object_class->dispose = photos_google_item_dispose;
+  base_item_class->create_thumbnail = photos_google_item_create_thumbnail;
+  base_item_class->download = photos_google_item_download;
+  base_item_class->get_source_widget = photos_google_item_get_source_widget;
+  base_item_class->open = photos_google_item_open;
+}
diff --git a/src/photos-google-item.h b/src/photos-google-item.h
new file mode 100644
index 0000000..90f71d2
--- /dev/null
+++ b/src/photos-google-item.h
@@ -0,0 +1,73 @@
+/*
+ * Photos - access, organize and share your photos on GNOME
+ * Copyright © 2014 Saurav Agarwalla
+ *
+ * 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 the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+/* Based on code from:
+ *   + Documents
+ */
+
+#ifndef PHOTOS_GOOGLE_ITEM_H
+#define PHOTOS_GOOGLE_ITEM_H
+
+#include "photos-base-item.h"
+
+G_BEGIN_DECLS
+
+#define PHOTOS_TYPE_GOOGLE_ITEM (photos_google_item_get_type ())
+
+#define PHOTOS_GOOGLE_ITEM(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST ((obj), \
+   PHOTOS_TYPE_GOOGLE_ITEM, PhotosGoogleItem))
+
+#define PHOTOS_GOOGLE_ITEM_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST ((klass), \
+   PHOTOS_TYPE_GOOGLE_ITEM, PhotosGoogleItemClass))
+
+#define PHOTOS_IS_GOOGLE_ITEM(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE ((obj), \
+   PHOTOS_TYPE_GOOGLE_ITEM))
+
+#define PHOTOS_IS_GOOGLE_ITEM_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE ((klass), \
+   PHOTOS_TYPE_GOOGLE_ITEM))
+
+#define PHOTOS_GOOGLE_ITEM_GET_CLASS(obj) \
+  (G_TYPE_INSTANCE_GET_CLASS ((obj), \
+   PHOTOS_TYPE_GOOGLE_ITEM, PhotosGoogleItemClass))
+
+typedef struct _PhotosGoogleItem        PhotosGoogleItem;
+typedef struct _PhotosGoogleItemClass   PhotosGoogleItemClass;
+typedef struct _PhotosGoogleItemPrivate PhotosGoogleItemPrivate;
+
+struct _PhotosGoogleItem
+{
+  PhotosBaseItem parent_instance;
+  PhotosGoogleItemPrivate *priv;
+};
+
+struct _PhotosGoogleItemClass
+{
+  PhotosBaseItemClass parent_class;
+};
+
+GType               photos_google_item_get_type           (void) G_GNUC_CONST;
+
+G_END_DECLS
+
+#endif /* PHOTOS_GOOGLE_ITEM_H */
diff --git a/src/photos-utils.c b/src/photos-utils.c
index e82556a..5e61c98 100644
--- a/src/photos-utils.c
+++ b/src/photos-utils.c
@@ -37,6 +37,7 @@
 #include "photos-application.h"
 #include "photos-facebook-item.h"
 #include "photos-flickr-item.h"
+#include "photos-google-item.h"
 #include "photos-local-item.h"
 #include "photos-query.h"
 #include "photos-source.h"
@@ -310,7 +311,9 @@ photos_utils_get_icon_from_cursor (TrackerSparqlCursor *cursor)
   identifier = tracker_sparql_cursor_get_string (cursor, PHOTOS_QUERY_COLUMNS_IDENTIFIER, NULL);
   if (identifier != NULL)
     {
-      if (g_str_has_prefix (identifier, "facebook:") || g_str_has_prefix (identifier, "flickr:"))
+      if (g_str_has_prefix (identifier, "facebook:") ||
+          g_str_has_prefix (identifier, "flickr:") ||
+          g_str_has_prefix (identifier, "google:"))
         is_remote = TRUE;
     }
 
@@ -379,6 +382,7 @@ photos_utils_ensure_builtins (void)
     {
       g_type_ensure (PHOTOS_TYPE_FACEBOOK_ITEM);
       g_type_ensure (PHOTOS_TYPE_FLICKR_ITEM);
+      g_type_ensure (PHOTOS_TYPE_GOOGLE_ITEM);
       g_type_ensure (PHOTOS_TYPE_LOCAL_ITEM);
 
       g_once_init_leave (&once_init_value, 1);