[gnome-todo] eds: Introduce ESourceGnomeTodo

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 34c05f1ebca87329d895e449a5665c7284a437e3
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Wed Feb 6 13:34:24 2019 -0200

    eds: Introduce ESourceGnomeTodo
    
    ESourceGnomeTodo is an ESourceExtension that tracks the
    current GNOME To Do API in use. This will be used to
    migrate tasks between different API versions.

 plugins/eds/e-source-gnome-todo.c | 128 ++++++++++++++++++++++++++++++++++++++
 plugins/eds/e-source-gnome-todo.h |  35 +++++++++++
 plugins/eds/meson.build           |   1 +
 3 files changed, 164 insertions(+)
---
diff --git a/plugins/eds/e-source-gnome-todo.c b/plugins/eds/e-source-gnome-todo.c
new file mode 100644
index 0000000..09634d1
--- /dev/null
+++ b/plugins/eds/e-source-gnome-todo.c
@@ -0,0 +1,128 @@
+/* gtd-task-list-eds.h
+ *
+ * Copyright (C) 2015 Georges Basile Stavracas Neto <georges stavracas gmail com>
+ *
+ * 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/>.
+ */
+
+#include "e-source-gnome-todo.h"
+
+struct _ESourceGnomeTodo
+{
+  ESourceExtension    parent;
+
+  guint               api_version;
+};
+
+G_DEFINE_TYPE (ESourceGnomeTodo, e_source_gnome_todo, E_TYPE_SOURCE_EXTENSION)
+
+enum
+{
+  PROP_0,
+  PROP_API_VERSION,
+  N_PROPS
+};
+
+static GParamSpec *properties [N_PROPS] = { NULL, };
+
+
+/*
+ * GObject overrides
+ */
+
+static void
+e_source_gnome_todo_get_property (GObject    *object,
+                                  guint       prop_id,
+                                  GValue     *value,
+                                  GParamSpec *pspec)
+{
+  ESourceGnomeTodo *self = E_SOURCE_GNOME_TODO (object);
+
+  switch (prop_id)
+    {
+    case PROP_API_VERSION:
+      g_value_set_uint (value, self->api_version);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+e_source_gnome_todo_set_property (GObject      *object,
+                                  guint         prop_id,
+                                  const GValue *value,
+                                  GParamSpec   *pspec)
+{
+  ESourceGnomeTodo *self = E_SOURCE_GNOME_TODO (object);
+
+  switch (prop_id)
+    {
+    case PROP_API_VERSION:
+      self->api_version = g_value_get_uint (value);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+e_source_gnome_todo_class_init (ESourceGnomeTodoClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  ESourceExtensionClass *extension_class = E_SOURCE_EXTENSION_CLASS (klass);
+
+  object_class->get_property = e_source_gnome_todo_get_property;
+  object_class->set_property = e_source_gnome_todo_set_property;
+
+  extension_class->name = E_SOURCE_EXTENSION_GNOME_TODO;
+
+  properties[PROP_API_VERSION] = g_param_spec_uint ("api-version",
+                                                    "API Version",
+                                                    "API Version",
+                                                    0,
+                                                    G_MAXUINT,
+                                                    0,
+                                                    G_PARAM_READWRITE | E_SOURCE_PARAM_SETTING | 
G_PARAM_STATIC_STRINGS);
+  g_object_class_install_properties (object_class, N_PROPS, properties);
+}
+
+static void
+e_source_gnome_todo_init (ESourceGnomeTodo *self)
+{
+  self->api_version = 0;
+}
+
+guint
+e_source_gnome_todo_get_api_version (ESourceGnomeTodo *self)
+{
+  g_return_val_if_fail (E_IS_SOURCE_GNOME_TODO (self), 0);
+
+  return self->api_version;
+}
+
+void
+e_source_gnome_todo_set_api_version (ESourceGnomeTodo *self,
+                                     guint             api_version)
+{
+  g_return_if_fail (E_IS_SOURCE_GNOME_TODO (self));
+
+  e_source_extension_property_lock (E_SOURCE_EXTENSION (self));
+  self->api_version = api_version;
+  e_source_extension_property_unlock (E_SOURCE_EXTENSION (self));
+
+  g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_API_VERSION]);
+}
diff --git a/plugins/eds/e-source-gnome-todo.h b/plugins/eds/e-source-gnome-todo.h
new file mode 100644
index 0000000..47bc45f
--- /dev/null
+++ b/plugins/eds/e-source-gnome-todo.h
@@ -0,0 +1,35 @@
+/* gtd-task-list-eds.h
+ *
+ * Copyright (C) 2015 Georges Basile Stavracas Neto <georges stavracas gmail com>
+ *
+ * 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/>.
+ */
+
+#pragma once
+
+#include <libedataserver/libedataserver.h>
+
+G_BEGIN_DECLS
+
+#define E_SOURCE_EXTENSION_GNOME_TODO "GNOME To Do"
+
+#define E_TYPE_SOURCE_GNOME_TODO (e_source_gnome_todo_get_type())
+G_DECLARE_FINAL_TYPE (ESourceGnomeTodo, e_source_gnome_todo, E, SOURCE_GNOME_TODO, ESourceExtension)
+
+guint                e_source_gnome_todo_get_api_version         (ESourceGnomeTodo   *self);
+
+void                 e_source_gnome_todo_set_api_version         (ESourceGnomeTodo   *self,
+                                                                  guint               api_version);
+
+G_END_DECLS
diff --git a/plugins/eds/meson.build b/plugins/eds/meson.build
index f7eec6c..6c5cbb6 100644
--- a/plugins/eds/meson.build
+++ b/plugins/eds/meson.build
@@ -16,6 +16,7 @@ eds_plugin_deps = [
 eds_plugin_deps += gnome_todo_deps
 
 sources = files(
+  'e-source-gnome-todo.c',
   'gtd-plugin-' + plugin_name + '.c',
   'gtd-provider-' + plugin_name + '.c',
   'gtd-provider-goa.c',