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[gnome-photos/wip/rishi/collection: 29/35] Add PhotosDeviceItem

commit 616c844293ab17f7133052350687a5a238bdbc49
Author: Debarshi Ray <debarshir gnome org>
Date:   Wed Jan 24 11:56:53 2018 +0100

    Add PhotosDeviceItem

 src/Makefile.am          |   2 +
 src/photos-device-item.c | 495 +++++++++++++++++++++++++++++++++++++++++++++++
 src/photos-device-item.h |  35 ++++
 src/photos-utils.c       |   2 +
 4 files changed, 534 insertions(+)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index dc3d8a86..7240390b 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -70,6 +70,8 @@ gnome_photos_SOURCES = \
        photos-delete-item-job.h \
        photos-delete-notification.c \
        photos-delete-notification.h \
+       photos-device-item.c \
+       photos-device-item.h \
        photos-dlna-renderer.c \
        photos-dlna-renderer.h \
        photos-dlna-renderers-dialog.c \
diff --git a/src/photos-device-item.c b/src/photos-device-item.c
new file mode 100644
index 00000000..49857cfd
--- /dev/null
+++ b/src/photos-device-item.c
@@ -0,0 +1,495 @@
+/*
+ * Photos - access, organize and share your photos on GNOME
+ * Copyright © 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
+ * the Free Software Foundation, either version 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Based on code from:
+ *   + Documents
+ */
+
+
+#include "config.h"
+
+#include <gexiv2/gexiv2.h>
+#include <gio/gio.h>
+#include <glib.h>
+#include <glib/gi18n.h>
+
+#include "photos-device-item.h"
+#include "photos-error.h"
+#include "photos-glib.h"
+#include "photos-utils.h"
+
+
+struct _PhotosDeviceItem
+{
+  PhotosBaseItem parent_instance;
+  GCancellable *cancellable;
+};
+
+
+G_DEFINE_TYPE_WITH_CODE (PhotosDeviceItem, photos_device_item, PHOTOS_TYPE_BASE_ITEM,
+                         photos_utils_ensure_extension_points ();
+                         g_io_extension_point_implement (PHOTOS_BASE_ITEM_EXTENSION_POINT_NAME,
+                                                         g_define_type_id,
+                                                         "device",
+                                                         0));
+
+
+static gboolean
+photos_device_item_source_widget_activate_link (GtkLinkButton *button, gpointer user_data)
+{
+  g_autoptr (GAppInfo) default_app = NULL;
+  g_autoptr (GAppInfo) nautilus_app = NULL;
+  g_autoptr (GAppLaunchContext) ctx = NULL;
+  PhotosDeviceItem *self;
+  gboolean ret_val = GDK_EVENT_PROPAGATE;
+  const gchar *commandline = "nautilus --select";
+  const gchar *default_app_id;
+  const gchar *source_uri;
+  const gchar *uri;
+  g_autofree gchar *command_line = NULL;
+  g_autofree gchar *source_uri_scheme = NULL;
+
+  g_return_val_if_fail (GTK_IS_LINK_BUTTON (button), GDK_EVENT_PROPAGATE);
+  g_return_val_if_fail (PHOTOS_IS_DEVICE_ITEM (user_data), GDK_EVENT_PROPAGATE);
+
+  self = PHOTOS_DEVICE_ITEM (user_data);
+
+  source_uri = gtk_link_button_get_uri (button);
+
+  /* Even though g_file_query_default_handler calls
+   * g_app_info_get_default_for_uri_scheme, we have to do it here in
+   * case GFile can't parse source_uri correctly.
+   *
+   * See glib/gio/gappinfo.c
+   */
+
+  source_uri_scheme = g_uri_parse_scheme (source_uri);
+  if (source_uri_scheme != NULL && source_uri_scheme[0] != '\0')
+    default_app = g_app_info_get_default_for_uri_scheme (source_uri_scheme);
+
+  if (default_app == NULL)
+    {
+      g_autoptr (GFile) source_link = NULL;
+
+      source_link = g_file_new_for_uri (source_uri);
+
+      {
+        g_autoptr (GError) error = NULL;
+
+        default_app = g_file_query_default_handler (source_link, NULL, &error);
+        if (error != NULL)
+          {
+            g_warning ("Unable to query default handler for %s: %s", source_uri, error->message);
+            goto out;
+          }
+      }
+    }
+
+  g_return_val_if_fail (G_IS_APP_INFO (default_app), GDK_EVENT_PROPAGATE);
+
+  default_app_id = g_app_info_get_id (default_app);
+  if (g_strcmp0 (default_app_id, "org.gnome.Nautilus.desktop") != 0)
+    goto out;
+
+  {
+    g_autoptr (GError) error = NULL;
+
+    nautilus_app = g_app_info_create_from_commandline (commandline, NULL, G_APP_INFO_CREATE_NONE, &error);
+    if (error != NULL)
+      {
+        g_warning ("Unable to create GAppInfo from '%s': %s", commandline, error->message);
+        goto out;
+      }
+  }
+
+  uri = photos_base_item_get_uri (PHOTOS_BASE_ITEM (self));
+  ctx = photos_utils_new_app_launch_context_from_widget (GTK_WIDGET (button));
+
+  {
+    g_autoptr (GError) error = NULL;
+
+    if (!photos_glib_app_info_launch_uri (nautilus_app, uri, ctx, &error))
+      {
+        g_warning ("Unable to launch '%s': %s", commandline, error->message);
+        goto out;
+      }
+  }
+
+  ret_val = GDK_EVENT_STOP;
+
+ out:
+  return ret_val;
+}
+
+
+static gchar *
+photos_device_item_create_filename_fallback (PhotosBaseItem *item)
+{
+  g_warn_if_reached ();
+  return NULL;
+}
+
+
+static gchar *
+photos_device_item_create_name_fallback (PhotosBaseItem *item)
+{
+  const gchar *filename;
+  gchar *ret_val;
+
+  filename = photos_base_item_get_filename (item);
+  ret_val = photos_glib_filename_strip_extension (filename);
+  return ret_val;
+}
+
+
+static gchar *
+photos_device_item_get_pipeline_path (PhotosDeviceItem *self)
+{
+  const gchar *data_dir;
+  const gchar *uri;
+  g_autofree gchar *md5 = NULL;
+  gchar *path;
+
+  uri = photos_base_item_get_uri (PHOTOS_BASE_ITEM (self));
+  md5 = g_compute_checksum_for_string (G_CHECKSUM_MD5, uri, -1);
+  data_dir = g_get_user_data_dir ();
+
+  path = g_build_filename (data_dir, PACKAGE_TARNAME, "local", md5, NULL);
+
+  return path;
+}
+
+
+static gchar *
+photos_device_item_create_pipeline_path (PhotosBaseItem *item)
+{
+  PhotosDeviceItem *self = PHOTOS_DEVICE_ITEM (item);
+  gchar *path;
+  g_autofree gchar *pipeline_dir = NULL;
+
+  path = photos_device_item_get_pipeline_path (self);
+  pipeline_dir = g_path_get_dirname (path);
+  g_mkdir_with_parents (pipeline_dir, 0700);
+
+  return path;
+}
+
+
+static gboolean
+photos_device_item_create_thumbnail (PhotosBaseItem *item, GCancellable *cancellable, GError **error)
+{
+  PhotosDeviceItem *self = PHOTOS_DEVICE_ITEM (item);
+  g_autoptr (GFile) file = NULL;
+  GQuark orientation;
+  gboolean ret_val = FALSE;
+  const gchar *mime_type;
+  const gchar *uri;
+  g_autofree gchar *pipeline_path = NULL;
+  g_autofree gchar *pipeline_uri = NULL;
+  gint64 height;
+  gint64 mtime;
+  gint64 width;
+
+  uri = photos_base_item_get_uri (PHOTOS_BASE_ITEM (self));
+  file = g_file_new_for_uri (uri);
+  mime_type = photos_base_item_get_mime_type (PHOTOS_BASE_ITEM (self));
+  mtime = photos_base_item_get_mtime (PHOTOS_BASE_ITEM (self));
+  orientation = photos_base_item_get_orientation (PHOTOS_BASE_ITEM (self));
+  height = photos_base_item_get_height (PHOTOS_BASE_ITEM (self));
+  width = photos_base_item_get_width (PHOTOS_BASE_ITEM (self));
+
+  pipeline_path = photos_device_item_get_pipeline_path (self);
+  pipeline_uri = photos_utils_convert_path_to_uri (pipeline_path);
+
+  if (!photos_utils_create_thumbnail (file,
+                                      mime_type,
+                                      mtime,
+                                      orientation,
+                                      height,
+                                      width,
+                                      pipeline_uri,
+                                      cancellable,
+                                      error))
+    goto out;
+
+  ret_val = TRUE;
+
+ out:
+  return ret_val;
+}
+
+
+static gchar *
+photos_device_item_download (PhotosBaseItem *item, GCancellable *cancellable, GError **error)
+{
+  const gchar *uri;
+  gchar *path;
+
+  uri = photos_base_item_get_uri (item);
+  path = g_filename_from_uri (uri, NULL, error);
+  return path;
+}
+
+
+static GtkWidget *
+photos_device_item_get_source_widget (PhotosBaseItem *item)
+{
+  GtkWidget *source_widget;
+
+  if (photos_base_item_is_collection (item))
+    {
+      source_widget = gtk_label_new (_("Local"));
+      gtk_widget_set_halign (source_widget, GTK_ALIGN_START);
+    }
+  else
+    {
+      g_autoptr (GFile) file = NULL;
+      g_autoptr (GFile) source_link = NULL;
+      GtkWidget *label;
+      const gchar *uri;
+      g_autofree gchar *source_path = NULL;
+      g_autofree gchar *source_uri = NULL;
+
+      uri = photos_base_item_get_uri (item);
+      file = g_file_new_for_uri (uri);
+      source_link = g_file_get_parent (file);
+      source_path = g_file_get_path (source_link);
+      source_uri = g_file_get_uri (source_link);
+
+      source_widget = gtk_link_button_new_with_label (source_uri, source_path);
+      gtk_widget_set_halign (source_widget, GTK_ALIGN_START);
+      g_signal_connect_object (source_widget,
+                               "activate-link",
+                               G_CALLBACK (photos_device_item_source_widget_activate_link),
+                               item,
+                               0);
+
+      label = gtk_bin_get_child (GTK_BIN (source_widget));
+      gtk_label_set_ellipsize (GTK_LABEL (label), PANGO_ELLIPSIZE_END);
+      gtk_label_set_max_width_chars (GTK_LABEL (label), 40);
+    }
+
+  return source_widget;
+}
+
+
+static gboolean
+photos_device_item_metadata_add_shared (PhotosBaseItem  *item,
+                                       const gchar     *provider_type,
+                                       const gchar     *account_identity,
+                                       const gchar     *shared_id,
+                                       GCancellable    *cancellable,
+                                       GError         **error)
+{
+  g_autoptr (GVariant) shared_variant = NULL;
+  const GVariantType *tuple_items[] =
+    {
+      G_VARIANT_TYPE_STRING, /* provider-type */
+      G_VARIANT_TYPE_STRING, /* account-identity */
+      G_VARIANT_TYPE_STRING  /* shared-id */
+    };
+  g_autoptr (GVariantType) array_type = NULL;
+  g_autoptr (GVariantType) tuple_type = NULL;
+  GExiv2Metadata *metadata = NULL; /* TODO: Use g_autoptr */
+  gboolean ret_val = FALSE;
+  const gchar *mime_type;
+  const gchar *shared_tag = "Xmp.gnome.photos-shared";
+  const gchar *version_tag = "Xmp.gnome.photos-xmp-version";
+  g_autofree gchar *path = NULL;
+  g_autofree gchar *tuple_type_format = NULL;
+
+  mime_type = photos_base_item_get_mime_type (item);
+  if (g_strcmp0 (mime_type, "image/png") != 0
+      && g_strcmp0 (mime_type, "image/jp2") != 0
+      && g_strcmp0 (mime_type, "image/jpeg") != 0)
+    {
+      ret_val = TRUE;
+      goto out;
+    }
+
+  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;
+
+  if (!gexiv2_metadata_set_tag_long (metadata, version_tag, 0))
+    {
+      g_set_error (error, PHOTOS_ERROR, 0, "Failed to update %s", version_tag);
+      goto out;
+    }
+
+  tuple_type = g_variant_type_new_tuple (tuple_items, G_N_ELEMENTS (tuple_items));
+  tuple_type_format = g_variant_type_dup_string (tuple_type);
+
+  array_type = g_variant_type_new_array (tuple_type);
+
+  {
+    g_auto (GVariantBuilder) builder = G_VARIANT_BUILDER_INIT (array_type);
+    g_autofree gchar *shared_string = NULL;
+
+    g_variant_builder_add (&builder, tuple_type_format, provider_type, account_identity, shared_id);
+
+    shared_string = gexiv2_metadata_get_tag_string (metadata, shared_tag);
+    if (shared_string != NULL)
+      {
+        g_autoptr (GVariant) old_shared_variant = NULL;
+        GVariant *child = NULL;
+        GVariantIter iter;
+
+        old_shared_variant = g_variant_parse (array_type, shared_string, NULL, NULL, error);
+        if (old_shared_variant == NULL)
+          goto out;
+
+        g_variant_iter_init (&iter, old_shared_variant);
+        child = g_variant_iter_next_value (&iter);
+        while (child != NULL)
+          {
+            g_variant_builder_add_value (&builder, child);
+            g_variant_unref (child);
+            child = g_variant_iter_next_value (&iter);
+          }
+      }
+
+    shared_variant = g_variant_builder_end (&builder);
+  }
+
+  {
+    g_autofree gchar *shared_string = NULL;
+
+    shared_string = g_variant_print (shared_variant, TRUE);
+    if (!gexiv2_metadata_set_tag_string (metadata, shared_tag, shared_string))
+      {
+        g_set_error (error, PHOTOS_ERROR, 0, "Failed to update %s", shared_tag);
+        goto out;
+      }
+  }
+
+  if (!gexiv2_metadata_save_file (metadata, path, error))
+    goto out;
+
+  ret_val = TRUE;
+
+ out:
+  g_clear_object (&metadata);
+  return ret_val;
+}
+
+
+static void
+photos_device_item_trash_finish (GObject *source_object, GAsyncResult *res, gpointer user_data)
+{
+  GFile *file = G_FILE (source_object);
+
+  {
+    g_autoptr (GError) error = NULL;
+
+    if (!g_file_trash_finish (file, res, &error))
+      {
+        if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
+          {
+            PhotosDeviceItem *self = PHOTOS_DEVICE_ITEM (user_data);
+            const gchar *uri;
+
+            uri = photos_base_item_get_uri (PHOTOS_BASE_ITEM (self));
+            g_warning ("Unable to trash %s: %s", uri, error->message);
+          }
+      }
+  }
+}
+
+
+static void
+photos_device_item_trash (PhotosBaseItem *item)
+{
+  g_autoptr (GFile) file = NULL;
+  const gchar *uri;
+  PhotosDeviceItem *self = PHOTOS_DEVICE_ITEM (item);
+
+  if (photos_base_item_is_collection (item))
+    return;
+
+  uri = photos_base_item_get_uri (item);
+  file = g_file_new_for_uri (uri);
+  g_file_trash_async (file, G_PRIORITY_DEFAULT, self->cancellable, photos_device_item_trash_finish, self);
+}
+
+
+static void
+photos_device_item_constructed (GObject *object)
+{
+  PhotosDeviceItem *self = PHOTOS_DEVICE_ITEM (object);
+  g_autoptr (GAppInfo) default_app = NULL;
+  const gchar *mime_type;
+
+  G_OBJECT_CLASS (photos_device_item_parent_class)->constructed (object);
+
+  mime_type = photos_base_item_get_mime_type (PHOTOS_BASE_ITEM (self));
+  if (mime_type == NULL)
+    return;
+
+  default_app = g_app_info_get_default_for_type (mime_type, FALSE);
+  if (default_app == NULL)
+    return;
+
+  photos_base_item_set_default_app (PHOTOS_BASE_ITEM (self), default_app);
+}
+
+
+static void
+photos_device_item_dispose (GObject *object)
+{
+  PhotosDeviceItem *self = PHOTOS_DEVICE_ITEM (object);
+
+  if (self->cancellable != NULL)
+    {
+      g_cancellable_cancel (self->cancellable);
+      g_clear_object (&self->cancellable);
+    }
+
+  G_OBJECT_CLASS (photos_device_item_parent_class)->dispose (object);
+}
+
+
+static void
+photos_device_item_init (PhotosDeviceItem *self)
+{
+  self->cancellable = g_cancellable_new ();
+}
+
+
+static void
+photos_device_item_class_init (PhotosDeviceItemClass *class)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (class);
+  PhotosBaseItemClass *base_item_class = PHOTOS_BASE_ITEM_CLASS (class);
+
+  object_class->constructed = photos_device_item_constructed;
+  object_class->dispose = photos_device_item_dispose;
+  base_item_class->create_filename_fallback = photos_device_item_create_filename_fallback;
+  base_item_class->create_name_fallback = photos_device_item_create_name_fallback;
+  base_item_class->create_pipeline_path = photos_device_item_create_pipeline_path;
+  base_item_class->create_thumbnail = photos_device_item_create_thumbnail;
+  base_item_class->download = photos_device_item_download;
+  base_item_class->get_source_widget = photos_device_item_get_source_widget;
+  base_item_class->metadata_add_shared = photos_device_item_metadata_add_shared;
+  base_item_class->trash = photos_device_item_trash;
+}
diff --git a/src/photos-device-item.h b/src/photos-device-item.h
new file mode 100644
index 00000000..b5f27c06
--- /dev/null
+++ b/src/photos-device-item.h
@@ -0,0 +1,35 @@
+/*
+ * Photos - access, organize and share your photos on GNOME
+ * Copyright © 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
+ * the Free Software Foundation, either version 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Based on code from:
+ *   + Documents
+ */
+
+#ifndef PHOTOS_DEVICE_ITEM_H
+#define PHOTOS_DEVICE_ITEM_H
+
+#include "photos-base-item.h"
+
+G_BEGIN_DECLS
+
+#define PHOTOS_TYPE_DEVICE_ITEM (photos_device_item_get_type ())
+G_DECLARE_FINAL_TYPE (PhotosDeviceItem, photos_device_item, PHOTOS, DEVICE_ITEM, PhotosBaseItem);
+
+G_END_DECLS
+
+#endif /* PHOTOS_DEVICE_ITEM_H */
diff --git a/src/photos-utils.c b/src/photos-utils.c
index a0bb452e..0ed5bf06 100644
--- a/src/photos-utils.c
+++ b/src/photos-utils.c
@@ -34,6 +34,7 @@
 #include <libgd/gd.h>
 
 #include "photos-application.h"
+#include "photos-device-item.h"
 #include "photos-enums.h"
 #include "photos-error.h"
 #include "photos-facebook-item.h"
@@ -704,6 +705,7 @@ photos_utils_ensure_builtins (void)
 
   if (g_once_init_enter (&once_init_value))
     {
+      g_type_ensure (PHOTOS_TYPE_DEVICE_ITEM);
       g_type_ensure (PHOTOS_TYPE_FACEBOOK_ITEM);
       g_type_ensure (PHOTOS_TYPE_FLICKR_ITEM);
       g_type_ensure (PHOTOS_TYPE_GOOGLE_ITEM);
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