[gnome-software/wip/william/cherry-pick-4: 5/23] Add a snappy plugin



commit eb8b368dd25a30b739fa3e407136c7fee3c96df1
Author: Robert Ancell <robert ancell canonical com>
Date:   Thu Jun 2 13:53:24 2016 -0400

    Add a snappy plugin
    
    Authored by Robert Ancell <robert ancell canonical com> and William Hua
    <william hua canonical com>.

 po/POTFILES.in                 |    1 +
 src/plugins/Makefile.am        |   19 ++-
 src/plugins/gs-plugin-snappy.c |  476 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 495 insertions(+), 1 deletions(-)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 73a4f41..7fc57f1 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -58,6 +58,7 @@ src/gs-common.c
 src/org.gnome.Software.desktop.in
 src/plugins/gs-ubuntuone-dialog.c
 [type: gettext/glade]src/plugins/gs-ubuntuone-dialog.ui
+src/plugins/gs-plugin-snappy.c
 src/plugins/menu-spec-common.c
 [type: gettext/glade]src/gs-popular-tile.ui
 src/gs-shell-loading.c
diff --git a/src/plugins/Makefile.am b/src/plugins/Makefile.am
index 5f91f04..835642a 100644
--- a/src/plugins/Makefile.am
+++ b/src/plugins/Makefile.am
@@ -43,7 +43,8 @@ plugin_LTLIBRARIES =                                  \
        libgs_plugin_provenance-license.la              \
        libgs_plugin_fedora-tagger-usage.la             \
        libgs_plugin_epiphany.la                        \
-       libgs_plugin_icons.la
+       libgs_plugin_icons.la                           \
+       libgs_plugin_snappy.la
 
 if HAVE_APT
 plugin_LTLIBRARIES +=                                  \
@@ -342,6 +343,22 @@ libgs_plugin_packagekit_proxy_la_LIBADD = $(GS_PLUGIN_LIBS)
 libgs_plugin_packagekit_proxy_la_LDFLAGS = -module -avoid-version
 libgs_plugin_packagekit_proxy_la_CFLAGS = $(GS_PLUGIN_CFLAGS) $(WARN_CFLAGS)
 
+libgs_plugin_snappy_la_SOURCES =                       \
+       gs-plugin-snappy.c                              \
+       gs-ubuntuone.h                                  \
+       gs-ubuntuone.c                                  \
+       gs-ubuntuone-dialog.h                           \
+       gs-ubuntuone-dialog.c                           \
+       gs-ubuntu-snapd.h                               \
+       gs-ubuntu-snapd.c
+libgs_plugin_snappy_la_LIBADD =                                \
+       $(GS_PLUGIN_LIBS)                               \
+       $(SOUP_LIBS)                                    \
+       $(JSON_GLIB_LIBS)                               \
+       $(LIBSECRET_LIBS)
+libgs_plugin_snappy_la_LDFLAGS = -module -avoid-version
+libgs_plugin_snappy_la_CFLAGS = $(GS_PLUGIN_CFLAGS) $(WARN_CFLAGS)
+
 if ENABLE_TESTS
 check_PROGRAMS =                                               \
        gs-self-test
diff --git a/src/plugins/gs-plugin-snappy.c b/src/plugins/gs-plugin-snappy.c
new file mode 100644
index 0000000..e029c8c
--- /dev/null
+++ b/src/plugins/gs-plugin-snappy.c
@@ -0,0 +1,476 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2015 Canonical Ltd
+ *
+ * Licensed under the GNU General Public License Version 2
+ *
+ * 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.
+ */
+
+#include <gs-plugin.h>
+#include <glib/gi18n.h>
+#include <json-glib/json-glib.h>
+#include <gnome-software.h>
+#include "gs-ubuntu-snapd.h"
+#include "gs-ubuntuone.h"
+
+// snapd API documentation is at https://github.com/ubuntu-core/snappy/blob/master/docs/rest.md
+
+#define SNAPD_SOCKET "/run/snapd.socket"
+
+typedef gboolean (*AppFilterFunc)(const gchar *id, JsonObject *object, gpointer data);
+
+void
+gs_plugin_initialize (GsPlugin *plugin)
+{
+       if (!g_file_test (SNAPD_SOCKET, G_FILE_TEST_EXISTS)) {
+               g_debug ("disabling '%s' as no %s available",
+                        gs_plugin_get_name (plugin), SNAPD_SOCKET);
+               gs_plugin_set_enabled (plugin, FALSE);
+       }
+}
+
+static JsonParser *
+parse_result (const gchar *response, const gchar *response_type, GError **error)
+{
+       g_autoptr(JsonParser) parser = NULL;
+       g_autoptr(GError) sub_error = NULL;
+
+       if (response_type == NULL) {
+               g_set_error_literal (error,
+                                    GS_PLUGIN_ERROR,
+                                    GS_PLUGIN_ERROR_FAILED,
+                                    "snapd returned no content type");
+               return NULL;
+       }
+       if (g_strcmp0 (response_type, "application/json") != 0) {
+               g_set_error (error,
+                            GS_PLUGIN_ERROR,
+                            GS_PLUGIN_ERROR_FAILED,
+                            "snapd returned unexpected content type %s", response_type);
+               return NULL;
+       }
+
+       parser = json_parser_new ();
+       if (!json_parser_load_from_data (parser, response, -1, &sub_error)) {
+               g_set_error (error,
+                            GS_PLUGIN_ERROR,
+                            GS_PLUGIN_ERROR_FAILED,
+                            "Unable to parse snapd response: %s", sub_error->message);
+               return NULL;
+       }
+       if (!JSON_NODE_HOLDS_OBJECT (json_parser_get_root (parser))) {
+               g_set_error_literal (error,
+                                    GS_PLUGIN_ERROR,
+                                    GS_PLUGIN_ERROR_FAILED,
+                                    "snapd response does is not a valid JSON object");
+               return NULL;
+       }
+
+       return g_object_ref (parser);
+}
+
+static void
+refine_app (GsPlugin *plugin, GsApp *app, JsonObject *package)
+{
+       const gchar *status, *icon_url;
+       g_autoptr(GdkPixbuf) icon_pixbuf = NULL;
+       gint64 size = -1;
+
+       status = json_object_get_string_member (package, "status");
+       if (g_strcmp0 (status, "installed") == 0 || g_strcmp0 (status, "active") == 0) {
+               const gchar *update_available;
+
+               update_available = json_object_has_member (package, "update_available") ? 
json_object_get_string_member (package, "update_available") : NULL;
+               if (update_available)
+                       gs_app_set_state (app, AS_APP_STATE_UPDATABLE);
+               else
+                       gs_app_set_state (app, AS_APP_STATE_INSTALLED);
+               size = json_object_get_int_member (package, "installed-size");
+       }
+       else if (g_strcmp0 (status, "removed") == 0) {
+               // A removed app is only available if it can be downloaded (it might have been sideloaded)
+               size = json_object_get_int_member (package, "download-size");
+               if (size > 0)
+                       gs_app_set_state (app, AS_APP_STATE_AVAILABLE);
+       } else if (g_strcmp0 (status, "not installed") == 0 || g_strcmp0 (status, "available") == 0) {
+               gs_app_set_state (app, AS_APP_STATE_AVAILABLE);
+               size = json_object_get_int_member (package, "download-size");
+       }
+       gs_app_set_name (app, GS_APP_QUALITY_HIGHEST, json_object_get_string_member (package, "summary"));
+       gs_app_set_summary (app, GS_APP_QUALITY_HIGHEST, json_object_get_string_member (package, 
"description"));
+       gs_app_set_version (app, json_object_get_string_member (package, "version"));
+       gs_app_set_size_download (app, json_object_get_int_member (package, "download-size"));
+       gs_app_set_size_installed (app, json_object_get_int_member (package, "installed-size"));
+       gs_app_add_quirk (app, AS_APP_QUIRK_PROVENANCE);
+       icon_url = json_object_get_string_member (package, "icon");
+       if (g_str_has_prefix (icon_url, "/")) {
+               g_autofree gchar *icon_response = NULL;
+               gsize icon_response_length;
+
+               if (send_snapd_request ("GET", icon_url, NULL, TRUE, NULL, TRUE, NULL, NULL, NULL, NULL, 
&icon_response, &icon_response_length, NULL)) {
+                       g_autoptr(GdkPixbufLoader) loader = NULL;
+
+                       loader = gdk_pixbuf_loader_new ();
+                       gdk_pixbuf_loader_write (loader, (guchar *) icon_response, icon_response_length, 
NULL);
+                       gdk_pixbuf_loader_close (loader, NULL);
+                       icon_pixbuf = g_object_ref (gdk_pixbuf_loader_get_pixbuf (loader));
+               }
+               else
+                       g_printerr ("Failed to get icon\n");
+       }
+       else {
+               g_autoptr(SoupMessage) message = NULL;
+               g_autoptr(GdkPixbufLoader) loader = NULL;
+
+               message = soup_message_new (SOUP_METHOD_GET, icon_url);
+               if (message != NULL) {
+                       soup_session_send_message (gs_plugin_get_soup_session (plugin), message);
+                       loader = gdk_pixbuf_loader_new ();
+                       gdk_pixbuf_loader_write (loader, (guint8 *) message->response_body->data,  
message->response_body->length, NULL);
+                       gdk_pixbuf_loader_close (loader, NULL);
+                       icon_pixbuf = g_object_ref (gdk_pixbuf_loader_get_pixbuf (loader));
+               }
+       }
+
+       if (icon_pixbuf)
+               gs_app_set_pixbuf (app, icon_pixbuf);
+       else {
+               g_autoptr(AsIcon) icon = NULL;
+
+               icon = as_icon_new ();
+               as_icon_set_kind (icon, AS_ICON_KIND_STOCK);
+               as_icon_set_name (icon, "package-x-generic");
+               gs_app_add_icon (app, icon);
+       }
+}
+
+static gboolean
+get_apps (GsPlugin *plugin, const gchar *sources, gchar **search_terms, GsAppList *list, AppFilterFunc 
filter_func, gpointer user_data, GError **error)
+{
+       guint status_code;
+       GPtrArray *query_fields;
+       g_autoptr (GString) path = NULL;
+       g_autofree gchar *reason_phrase = NULL, *response_type = NULL, *response = NULL;
+       g_autoptr(JsonParser) parser = NULL;
+       JsonObject *root;
+       JsonArray *result;
+       GList *snaps;
+       GList *i;
+
+       /* Get all the apps */
+       query_fields = g_ptr_array_new_with_free_func (g_free);
+       if (sources != NULL)
+               g_ptr_array_add (query_fields, g_strdup_printf ("sources=%s", sources));
+       if (search_terms != NULL) {
+               g_autofree gchar *query = NULL;
+               query = g_strjoinv ("+", search_terms);
+               g_ptr_array_add (query_fields, g_strdup_printf ("q=%s", query));
+       }
+       g_ptr_array_add (query_fields, NULL);
+       path = g_string_new ("/v2/snaps");
+       if (query_fields->len > 1) {
+               g_autofree gchar *fields = NULL;
+               g_string_append (path, "?");
+               fields = g_strjoinv ("&", (gchar **) query_fields->pdata);
+               g_string_append (path, fields);
+       }
+       g_ptr_array_free (query_fields, TRUE);
+       if (!send_snapd_request ("GET", path->str, NULL, TRUE, NULL, TRUE, NULL, &status_code, 
&reason_phrase, &response_type, &response, NULL, error))
+               return FALSE;
+
+       if (status_code != SOUP_STATUS_OK) {
+               g_set_error (error,
+                            GS_PLUGIN_ERROR,
+                            GS_PLUGIN_ERROR_FAILED,
+                            "snapd returned status code %d: %s", status_code, reason_phrase);
+               return FALSE;
+       }
+
+       parser = parse_result (response, response_type, error);
+       if (parser == NULL)
+               return FALSE;
+
+       root = json_node_get_object (json_parser_get_root (parser));
+       result = json_object_get_array_member (root, "result");
+       snaps = json_array_get_elements (result);
+
+       for (i = snaps; i != NULL; i = i->next) {
+               JsonObject *package = json_node_get_object (i->data);
+               g_autoptr(GsApp) app = NULL;
+               const gchar *id;
+
+               id = json_object_get_string_member (package, "name");
+
+               if (filter_func != NULL && !filter_func (id, package, user_data))
+                       continue;
+
+               app = gs_app_new (id);
+               gs_app_set_management_plugin (app, "snappy");
+               gs_app_set_origin (app, _("Ubuntu Snappy Store"));
+               gs_app_set_kind (app, AS_APP_KIND_DESKTOP);
+               gs_app_add_quirk (app, AS_APP_QUIRK_NOT_REVIEWABLE);
+               gs_app_add_quirk (app, AS_APP_QUIRK_NOT_LAUNCHABLE);
+               refine_app (plugin, app, package);
+               gs_app_list_add (list, app);
+       }
+
+       g_list_free (snaps);
+
+       return TRUE;
+}
+
+static gboolean
+get_app (GsPlugin *plugin, GsApp *app, GError **error)
+{
+       guint status_code;
+       g_autofree gchar *path = NULL, *reason_phrase = NULL, *response_type = NULL, *response = NULL;
+       g_autoptr(JsonParser) parser = NULL;
+       JsonObject *root, *result;
+
+       path = g_strdup_printf ("/v2/snaps/%s", gs_app_get_id (app));
+       if (!send_snapd_request ("GET", path, NULL, TRUE, NULL, TRUE, NULL, &status_code, &reason_phrase, 
&response_type, &response, NULL, error))
+               return FALSE;
+
+       if (status_code != SOUP_STATUS_OK) {
+               g_set_error (error,
+                            GS_PLUGIN_ERROR,
+                            GS_PLUGIN_ERROR_FAILED,
+                            "snapd returned status code %d: %s", status_code, reason_phrase);
+               return FALSE;
+       }
+
+       parser = parse_result (response, response_type, error);
+       if (parser == NULL)
+               return FALSE;
+       root = json_node_get_object (json_parser_get_root (parser));
+       result = json_object_get_object_member (root, "result");
+       if (result == NULL) {
+               g_set_error (error,
+                            GS_PLUGIN_ERROR,
+                            GS_PLUGIN_ERROR_FAILED,
+                            "snapd returned no results for %s", gs_app_get_id (app));
+               return FALSE;
+       }
+
+       refine_app (plugin, app, result);
+
+       return TRUE;
+}
+
+void
+gs_plugin_destroy (GsPlugin *plugin)
+{
+}
+
+static gboolean
+is_active (const gchar *id, JsonObject *object, gpointer data)
+{
+       const gchar *status = json_object_get_string_member (object, "status");
+       return g_strcmp0 (status, "active") == 0;
+}
+
+gboolean
+gs_plugin_add_installed (GsPlugin *plugin,
+                        GsAppList *list,
+                        GCancellable *cancellable,
+                        GError **error)
+{
+       return get_apps (plugin, "local", NULL, list, is_active, NULL, error);
+}
+
+gboolean
+gs_plugin_add_search (GsPlugin *plugin,
+                     gchar **values,
+                     GsAppList *list,
+                     GCancellable *cancellable,
+                     GError **error)
+{
+       return get_apps (plugin, NULL, values, list, NULL, values, error);
+}
+
+gboolean
+gs_plugin_refine (GsPlugin *plugin,
+                 GsAppList *list,
+                 GsPluginRefineFlags flags,
+                 GCancellable *cancellable,
+                 GError **error)
+{
+       guint i;
+
+       for (i = 0; i < gs_app_list_length (list); i++) {
+               GsApp *app = gs_app_list_index (list, i);
+
+               if (g_strcmp0 (gs_app_get_management_plugin (app), "snappy") != 0)
+                       continue;
+
+               // Get info from snapd
+               if (!get_app (plugin, app, error))
+                       return FALSE;
+       }
+
+       return TRUE;
+}
+
+static gboolean
+send_package_action (GsPlugin *plugin, GsApp *app, const char *id, const gchar *action, GError **error)
+{
+       g_autofree gchar *content = NULL, *path = NULL;
+       guint status_code;
+       g_autofree gchar *reason_phrase = NULL, *response_type = NULL, *response = NULL, *status = NULL;
+       g_autoptr(JsonParser) parser = NULL;
+       JsonObject *root, *result, *task, *progress;
+       JsonArray *tasks;
+       GList *task_list, *l;
+       gint64 done, total, task_done, task_total;
+        const gchar *resource_path;
+       const gchar *type;
+       const gchar *change_id;
+       g_autoptr(GVariant) macaroon = NULL;
+
+       content = g_strdup_printf ("{\"action\": \"%s\"}", action);
+       path = g_strdup_printf ("/v2/snaps/%s", id);
+       if (!send_snapd_request ("POST", path, content, TRUE, NULL, TRUE, &macaroon, &status_code, 
&reason_phrase, &response_type, &response, NULL, error))
+               return FALSE;
+
+       if (status_code != SOUP_STATUS_ACCEPTED) {
+               g_set_error (error,
+                            GS_PLUGIN_ERROR,
+                            GS_PLUGIN_ERROR_FAILED,
+                            "snapd returned status code %d: %s", status_code, reason_phrase);
+               return FALSE;
+       }
+
+       parser = parse_result (response, response_type, error);
+       if (parser == NULL)
+               return FALSE;
+
+       root = json_node_get_object (json_parser_get_root (parser));
+       type = json_object_get_string_member (root, "type");
+
+       if (g_strcmp0 (type, "async") == 0) {
+               change_id = json_object_get_string_member (root, "change");
+               resource_path = g_strdup_printf ("/v2/changes/%s", change_id);
+
+               while (TRUE) {
+                       g_autofree gchar *status_reason_phrase = NULL, *status_response_type = NULL, 
*status_response = NULL;
+                       g_autoptr(JsonParser) status_parser = NULL;
+
+                       /* Wait for a little bit before polling */
+                       g_usleep (100 * 1000);
+
+                       if (!send_snapd_request ("GET", resource_path, NULL, TRUE, macaroon, TRUE, NULL,
+                                                &status_code, &status_reason_phrase, &status_response_type,
+                                                &status_response, NULL, error)) {
+                               return FALSE;
+                       }
+
+                       if (status_code != SOUP_STATUS_OK) {
+                               g_set_error (error,
+                                            GS_PLUGIN_ERROR,
+                                            GS_PLUGIN_ERROR_FAILED,
+                                            "snapd returned status code %d: %s", status_code, 
status_reason_phrase);
+                               return FALSE;
+                       }
+
+                       status_parser = parse_result (status_response, status_response_type, error);
+                       if (status_parser == NULL)
+                               return FALSE;
+
+                       root = json_node_get_object (json_parser_get_root (status_parser));
+                       result = json_object_get_object_member (root, "result");
+
+                       g_free (status);
+                       status = g_strdup (json_object_get_string_member (result, "status"));
+
+                       if (g_strcmp0 (status, "Done") == 0)
+                               break;
+
+                       tasks = json_object_get_array_member (result, "tasks");
+                       task_list = json_array_get_elements (tasks);
+
+                       done = 0;
+                       total = 0;
+
+                       for (l = task_list; l != NULL; l = l->next) {
+                               task = json_node_get_object (l->data);
+                               progress = json_object_get_object_member (task, "progress");
+                               task_done = json_object_get_int_member (progress, "done");
+                               task_total = json_object_get_int_member (progress, "total");
+
+                               done += task_done;
+                               total += task_total;
+                       }
+
+                       gs_app_set_progress (app, 100 * done / total);
+
+                       g_list_free (task_list);
+               }
+       }
+
+       if (g_strcmp0 (status, "Done") != 0) {
+               g_set_error (error,
+                            GS_PLUGIN_ERROR,
+                            GS_PLUGIN_ERROR_FAILED,
+                            "snapd operation finished with status %s", status);
+               return FALSE;
+       }
+
+       return TRUE;
+}
+
+gboolean
+gs_plugin_app_install (GsPlugin *plugin,
+                      GsApp *app,
+                      GCancellable *cancellable,
+                      GError **error)
+{
+       gboolean result;
+
+       /* We can only install apps we know of */
+       if (g_strcmp0 (gs_app_get_management_plugin (app), "snappy") != 0)
+               return TRUE;
+
+       gs_app_set_state (app, AS_APP_STATE_INSTALLING);
+       result = send_package_action (plugin, app, gs_app_get_id (app), "install", error);
+       if (result)
+               gs_app_set_state (app, AS_APP_STATE_INSTALLED);
+       else
+               gs_app_set_state (app, AS_APP_STATE_AVAILABLE);
+
+       return result;
+}
+
+gboolean
+gs_plugin_app_remove (GsPlugin *plugin,
+                     GsApp *app,
+                     GCancellable *cancellable,
+                     GError **error)
+{
+       gboolean result;
+
+       /* We can only remove apps we know of */
+       if (g_strcmp0 (gs_app_get_management_plugin (app), "snappy") != 0)
+               return TRUE;
+
+       gs_app_set_state (app, AS_APP_STATE_REMOVING);
+       result = send_package_action (plugin, app, gs_app_get_id (app), "remove", error);
+       if (result)
+               gs_app_set_state (app, AS_APP_STATE_AVAILABLE);
+       else
+               gs_app_set_state (app, AS_APP_STATE_INSTALLED);
+
+       return result;
+}


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