[gnome-photos/wip/search: 9/11] Add PhotosFetchMetasJob

[Debarshi Ray <debarshir src gnome org>]

commit 66fe566aa5e8372138cab27320491f6370797e59
Author: Debarshi Ray <debarshir gnome org>
Date:   Sun Feb 9 13:37:40 2014 +0100

    Add PhotosFetchMetasJob

 src/Makefile.am              |    2 +
 src/photos-fetch-metas-job.c |  291 ++++++++++++++++++++++++++++++++++++++++++
 src/photos-fetch-metas-job.h |   93 ++++++++++++++
 3 files changed, 386 insertions(+), 0 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index c778cc3..a848b34 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -106,6 +106,8 @@ gnome_photos_SOURCES = \
        photos-fetch-collections-job.h \
        photos-fetch-ids-job.c \
        photos-fetch-ids-job.h \
+       photos-fetch-metas-job.c \
+       photos-fetch-metas-job.h \
        photos-filterable.c \
        photos-filterable.h \
        photos-flickr-item.c \
diff --git a/src/photos-fetch-metas-job.c b/src/photos-fetch-metas-job.c
new file mode 100644
index 0000000..4c4ce79
--- /dev/null
+++ b/src/photos-fetch-metas-job.c
@@ -0,0 +1,291 @@
+/*
+ * Photos - access, organize and share your photos on GNOME
+ * Copyright © 2014 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 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 <string.h>
+
+#include <glib.h>
+#include <glib/gi18n.h>
+#include <gio/gio.h>
+#include <tracker-sparql.h>
+
+#include "photos-create-collection-icon-job.h"
+#include "photos-fetch-metas-job.h"
+#include "photos-query.h"
+#include "photos-single-item-job.h"
+#include "photos-utils.h"
+
+
+struct _PhotosFetchMetasJobPrivate
+{
+  GList *metas;
+  PhotosFetchMetasJobCallback callback;
+  gchar **ids;
+  gpointer user_data;
+  guint active_jobs;
+};
+
+enum
+{
+  PROP_0,
+  PROP_IDS
+};
+
+
+G_DEFINE_TYPE_WITH_PRIVATE (PhotosFetchMetasJob, photos_fetch_metas_job, G_TYPE_OBJECT);
+
+
+static PhotosFetchMeta *
+photos_fetch_meta_new (GIcon *icon, const gchar *id, const gchar *title)
+{
+  PhotosFetchMeta *meta;
+
+  meta = g_slice_new0 (PhotosFetchMeta);
+
+  if (icon != NULL)
+    meta->icon = g_object_ref (icon);
+
+  meta->id = g_strdup (id);
+  meta->title = g_strdup (title);
+  return meta;
+}
+
+
+static void
+photos_fetch_metas_job_emit_callback (PhotosFetchMetasJob *self)
+{
+  PhotosFetchMetasJobPrivate *priv = self->priv;
+
+  if (priv->callback == NULL)
+    return;
+
+  (*priv->callback) (priv->metas, priv->user_data);
+}
+
+
+static void
+photos_fetch_metas_job_collector (PhotosFetchMetasJob *self)
+{
+  PhotosFetchMetasJobPrivate *priv = self->priv;
+
+  priv->active_jobs--;
+  if (priv->active_jobs == 0)
+    photos_fetch_metas_job_emit_callback (self);
+}
+
+
+static void
+photos_fetch_metas_job_create_collection_icon_executed (GIcon *icon, gpointer user_data)
+{
+  GTask *task = G_TASK (user_data);
+  PhotosFetchMetasJob *self;
+  PhotosFetchMetasJobPrivate *priv;
+  PhotosFetchMeta *meta;
+
+  self = PHOTOS_FETCH_METAS_JOB (g_task_get_source_object (task));
+  priv = self->priv;
+
+  meta = (PhotosFetchMeta *) g_task_get_task_data (task);
+
+  if (icon != NULL)
+    {
+      g_clear_object (&meta->icon);
+      meta->icon = g_object_ref (icon);
+    }
+
+  priv->metas = g_list_prepend (priv->metas, meta);
+  photos_fetch_metas_job_collector (self);
+  g_object_unref (task);
+}
+
+
+static void
+photos_fetch_metas_job_create_collection_pixbuf (PhotosFetchMetasJob *self, PhotosFetchMeta *meta)
+{
+  GTask *task;
+  PhotosCreateCollectionIconJob *job;
+
+  job = photos_create_collection_icon_job_new (meta->id);
+  task = g_task_new (self, NULL, NULL, NULL);
+  g_task_set_task_data (task, meta, NULL);
+  photos_create_collection_icon_job_run (job,
+                                         photos_fetch_metas_job_create_collection_icon_executed,
+                                         g_object_ref (task));
+  g_object_unref (task);
+}
+
+
+static void
+photos_fetch_metas_job_executed (TrackerSparqlCursor *cursor, gpointer user_data)
+{
+  PhotosFetchMetasJob *self = PHOTOS_FETCH_METAS_JOB (user_data);
+  PhotosFetchMetasJobPrivate *priv = self->priv;
+  GIcon *icon = NULL;
+  PhotosFetchMeta *meta;
+  gboolean is_collection;
+  const gchar *id;
+  const gchar *rdf_type;
+  const gchar *title;
+
+  id = tracker_sparql_cursor_get_string (cursor, PHOTOS_QUERY_COLUMNS_URN, NULL);
+  title = tracker_sparql_cursor_get_string (cursor, PHOTOS_QUERY_COLUMNS_TITLE, NULL);
+  rdf_type = tracker_sparql_cursor_get_string (cursor, PHOTOS_QUERY_COLUMNS_RDF_TYPE, NULL);
+
+  is_collection = (strstr (rdf_type, "nfo#DataContainer") != NULL);
+
+  if (!is_collection)
+    icon = photos_utils_get_icon_from_cursor (cursor);
+
+  if (title == NULL || title[0] == '\0')
+    title = _("Untitled Photo");
+
+  meta = photos_fetch_meta_new (icon, id, title);
+
+  if (is_collection)
+    photos_fetch_metas_job_create_collection_pixbuf (self, meta);
+  else
+    {
+      priv->metas = g_list_prepend (priv->metas, meta);
+      photos_fetch_metas_job_collector (self);
+    }
+
+  g_clear_object (&icon);
+  g_object_unref (self);
+}
+
+
+static void
+photos_fetch_metas_job_finalize (GObject *object)
+{
+  PhotosFetchMetasJob *self = PHOTOS_FETCH_METAS_JOB (object);
+  PhotosFetchMetasJobPrivate *priv = self->priv;
+
+  g_list_free_full (priv->metas, (GDestroyNotify) photos_fetch_meta_free);
+  g_strfreev (self->priv->ids);
+
+  G_OBJECT_CLASS (photos_fetch_metas_job_parent_class)->finalize (object);
+}
+
+
+static void
+photos_fetch_metas_job_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
+{
+  PhotosFetchMetasJob *self = PHOTOS_FETCH_METAS_JOB (object);
+
+  switch (prop_id)
+    {
+    case PROP_IDS:
+      self->priv->ids = g_value_dup_boxed (value);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+
+static void
+photos_fetch_metas_job_init (PhotosFetchMetasJob *self)
+{
+  self->priv = photos_fetch_metas_job_get_instance_private (self);
+}
+
+
+static void
+photos_fetch_metas_job_class_init (PhotosFetchMetasJobClass *class)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (class);
+
+  object_class->finalize = photos_fetch_metas_job_finalize;
+  object_class->set_property = photos_fetch_metas_job_set_property;
+
+  g_object_class_install_property (object_class,
+                                   PROP_IDS,
+                                   g_param_spec_boxed ("ids",
+                                                       "Identifiers",
+                                                       "Identifiers of items whose metadata is needed",
+                                                       G_TYPE_STRV,
+                                                       G_PARAM_CONSTRUCT_ONLY | G_PARAM_WRITABLE));
+}
+
+
+PhotosFetchMeta *
+photos_fetch_meta_copy (PhotosFetchMeta *meta)
+{
+  PhotosFetchMeta *copy;
+
+  copy = g_slice_new0 (PhotosFetchMeta);
+
+  if (meta->icon != NULL)
+    copy->icon = g_object_ref (meta->icon);
+
+  copy->id = g_strdup (meta->id);
+  copy->title = g_strdup (meta->title);
+  return copy;
+}
+
+
+void
+photos_fetch_meta_free (PhotosFetchMeta *meta)
+{
+  g_clear_object (&meta->icon);
+  g_free (meta->id);
+  g_free (meta->title);
+  g_slice_free (PhotosFetchMeta, meta);
+}
+
+
+PhotosFetchMetasJob *
+photos_fetch_metas_job_new (const gchar *const *ids)
+{
+  return g_object_new (PHOTOS_TYPE_FETCH_METAS_JOB, "ids", ids, NULL);
+}
+
+
+void
+photos_fetch_metas_job_run (PhotosFetchMetasJob *self, PhotosFetchMetasJobCallback callback, gpointer 
user_data)
+{
+  PhotosFetchMetasJobPrivate *priv = self->priv;
+  guint i;
+
+  priv->callback = callback;
+  priv->user_data = user_data;
+  priv->active_jobs = g_strv_length (priv->ids);
+
+  for (i = 0; priv->ids[i] != NULL; i++)
+    {
+      PhotosSingleItemJob *job;
+      const gchar *id = priv->ids[i];
+
+      job = photos_single_item_job_new (id);
+      photos_single_item_job_run (job,
+                                  PHOTOS_QUERY_FLAGS_UNFILTERED,
+                                  photos_fetch_metas_job_executed,
+                                  g_object_ref (self));
+      g_object_unref (job);
+    }
+}
diff --git a/src/photos-fetch-metas-job.h b/src/photos-fetch-metas-job.h
new file mode 100644
index 0000000..18bb1c6
--- /dev/null
+++ b/src/photos-fetch-metas-job.h
@@ -0,0 +1,93 @@
+/*
+ * Photos - access, organize and share your photos on GNOME
+ * Copyright © 2014 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 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_FETCH_METAS_JOB_H
+#define PHOTOS_FETCH_METAS_JOB_H
+
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+
+#define PHOTOS_TYPE_FETCH_METAS_JOB (photos_fetch_metas_job_get_type ())
+
+#define PHOTOS_FETCH_METAS_JOB(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST ((obj), \
+   PHOTOS_TYPE_FETCH_METAS_JOB, PhotosFetchMetasJob))
+
+#define PHOTOS_FETCH_METAS_JOB_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST ((klass), \
+   PHOTOS_TYPE_FETCH_METAS_JOB, PhotosFetchMetasJobClass))
+
+#define PHOTOS_IS_FETCH_METAS_JOB(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE ((obj), \
+   PHOTOS_TYPE_FETCH_METAS_JOB))
+
+#define PHOTOS_IS_FETCH_METAS_JOB_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE ((klass), \
+   PHOTOS_TYPE_FETCH_METAS_JOB))
+
+#define PHOTOS_FETCH_METAS_JOB_GET_CLASS(obj) \
+  (G_TYPE_INSTANCE_GET_CLASS ((obj), \
+   PHOTOS_TYPE_FETCH_METAS_JOB, PhotosFetchMetasJobClass))
+
+typedef struct _PhotosFetchMeta PhotosFetchMeta;
+
+struct _PhotosFetchMeta
+{
+  GIcon *icon;
+  gchar *id;
+  gchar *title;
+};
+
+PhotosFetchMeta       *photos_fetch_meta_copy                   (PhotosFetchMeta *meta);
+void                   photos_fetch_meta_free                   (PhotosFetchMeta *meta);
+
+typedef void (*PhotosFetchMetasJobCallback) (GList *, gpointer);
+
+typedef struct _PhotosFetchMetasJob        PhotosFetchMetasJob;
+typedef struct _PhotosFetchMetasJobClass   PhotosFetchMetasJobClass;
+typedef struct _PhotosFetchMetasJobPrivate PhotosFetchMetasJobPrivate;
+
+struct _PhotosFetchMetasJob
+{
+  GObject parent_instance;
+  PhotosFetchMetasJobPrivate *priv;
+};
+
+struct _PhotosFetchMetasJobClass
+{
+  GObjectClass parent_class;
+};
+
+GType                  photos_fetch_metas_job_get_type          (void) G_GNUC_CONST;
+
+PhotosFetchMetasJob   *photos_fetch_metas_job_new               (const gchar *const *ids);
+
+void                   photos_fetch_metas_job_run               (PhotosFetchMetasJob *self,
+                                                                 PhotosFetchMetasJobCallback callback,
+                                                                 gpointer user_data);
+
+G_END_DECLS
+
+#endif /* PHOTOS_FETCH_METAS_JOB_H */