[gnome-photos/wip/rishi/de-dup: 6/6] local-item: implement vfunc

[Debarshi Ray <debarshir src gnome org>]

commit e0566e3d3d29e444d0f496c570ae9e16f07c8a84
Author: Debarshi Ray <debarshir gnome org>
Date:   Tue Sep 6 20:46:05 2016 +0200

    local-item: implement vfunc

 src/photos-local-item.c |   91 +++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 91 insertions(+), 0 deletions(-)
---
diff --git a/src/photos-local-item.c b/src/photos-local-item.c
index 5cba1da..77ccae0 100644
--- a/src/photos-local-item.c
+++ b/src/photos-local-item.c
@@ -26,6 +26,7 @@
 
 #include "config.h"
 
+#include <gexiv2/gexiv2.h>
 #include <gio/gio.h>
 #include <glib.h>
 #include <glib/gi18n.h>
@@ -170,6 +171,95 @@ photos_local_item_get_source_widget (PhotosBaseItem *item)
 }
 
 
+static gboolean
+photos_local_item_metadata_add_shared (PhotosBaseItem  *item,
+                                       const gchar     *provider_type,
+                                       const gchar     *account_identity,
+                                       const gchar     *shared_id,
+                                       GCancellable    *cancellable,
+                                       GError         **error)
+{
+  GExiv2Metadata *metadata = NULL;
+  gboolean ret_val = FALSE;
+  gchar *path = NULL;
+  gchar **account_identities = NULL;
+  gchar **provider_types = NULL;
+  gchar **shared_ids = NULL;
+  guint n_account_identities;
+  guint n_provider_types;
+  guint n_shared_ids;
+
+  path = photos_base_item_download (item, cancellable, error);
+  if (path == NULL)
+    goto out;
+
+  metadata = gexiv2_metadata_new ();
+
+  if (!gexiv2_metadata_open_path (metadata, path, error))
+    goto out;
+
+  account_identities = gexiv2_metadata_get_tag_multiple (metadata, "Xmp.gnome.photos-account-identity");
+  n_account_identities = g_strv_length (account_identities);
+
+  provider_types = gexiv2_metadata_get_tag_multiple (metadata, "Xmp.gnome.photos-provider-type");
+  n_provider_types = g_strv_length (provider_types);
+
+  shared_ids = gexiv2_metadata_get_tag_multiple (metadata, "Xmp.gnome.photos-shared-id");
+  n_shared_ids = g_strv_length (shared_ids);
+
+  if (n_account_identities != n_provider_types || n_provider_types != n_shared_ids)
+    {
+      g_set_error (error, PHOTOS_ERROR, 0, "Invalid Xmp.gnome metadata");
+      goto out;
+    }
+
+  account_identities = (gchar **) g_realloc_n (account_identities, n_account_identities + 2, sizeof (gchar 
*));
+  account_identities[n_account_identities] = g_strdup (account_identity);
+  account_identities[n_account_identities + 1] = NULL;
+
+  provider_types = (gchar **) g_realloc_n (provider_types, n_provider_types + 2, sizeof (gchar *));
+  provider_types[n_provider_types] = g_strdup (provider_type);
+  provider_types[n_provider_types + 1] = NULL;
+
+  shared_ids = (gchar **) g_realloc_n (shared_ids, n_shared_ids + 2, sizeof (gchar *));
+  shared_ids[n_shared_ids] = g_strdup (shared_id);
+  shared_ids[n_shared_ids + 1] = NULL;
+
+  if (!gexiv2_metadata_set_tag_multiple (metadata,
+                                         "Xmp.gnome.photos-account-identity",
+                                         (const gchar **) account_identities))
+    {
+      g_set_error (error, PHOTOS_ERROR, 0, "Failed to write Xmp.gnome.photos-account-identity");
+      goto out;
+    }
+
+  if (!gexiv2_metadata_set_tag_multiple (metadata, "Xmp.gnome.photos-provider-type", (const gchar **) 
provider_types))
+    {
+      g_set_error (error, PHOTOS_ERROR, 0, "Failed to write Xmp.gnome.photos-provider-type");
+      goto out;
+    }
+
+  if (!gexiv2_metadata_set_tag_multiple (metadata, "Xmp.gnome.photos-shared-id", (const gchar **) 
shared_ids))
+    {
+      g_set_error (error, PHOTOS_ERROR, 0, "Failed to write Xmp.gnome.photos-shared-id");
+      goto out;
+    }
+
+  if (!gexiv2_metadata_save_file (metadata, path, error))
+    goto out;
+
+  ret_val = TRUE;
+
+ out:
+  g_clear_object (&metadata);
+  g_free (path);
+  g_strfreev (account_identities);
+  g_strfreev (provider_types);
+  g_strfreev (shared_ids);
+  return ret_val;
+}
+
+
 static void
 photos_local_item_trash_finish (GObject *source_object, GAsyncResult *res, gpointer user_data)
 {
@@ -271,5 +361,6 @@ 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->metadata_add_shared = photos_local_item_metadata_add_shared;
   base_item_class->trash = photos_local_item_trash;
 }