[gnome-software/wip/temp/ubuntu-xenial-rebased-corrected: 116/331] Show update information for APT packages

[William Hua <williamhua src gnome org>]

commit 91561c90995eb6991e837b1a2be4f4dce8395ccf
Author: Robert Ancell <robert ancell canonical com>
Date:   Thu Feb 25 15:37:38 2016 +1300

    Show update information for APT packages

 src/plugins/gs-plugin-apt.c |   80 +++++++++++++++++++++++++++++++++++++++++--
 1 files changed, 77 insertions(+), 3 deletions(-)
---
diff --git a/src/plugins/gs-plugin-apt.c b/src/plugins/gs-plugin-apt.c
index 81ff64d..b2a116e 100644
--- a/src/plugins/gs-plugin-apt.c
+++ b/src/plugins/gs-plugin-apt.c
@@ -352,6 +352,73 @@ done:
        return result;
 }
 
+static void
+get_changelog (GsPlugin *plugin, GsApp *app)
+{
+       const gchar *source, *current_version, *version;
+       g_autofree gchar *source_prefix = NULL, *uri = NULL, *changelog_prefix = NULL;
+       g_autoptr(SoupMessage) msg = NULL;
+       guint status_code;
+       gchar **lines;
+       int i;
+       GString *details;
+
+       g_return_if_fail (gs_app_get_source_default (app) != NULL);
+       g_return_if_fail (gs_app_get_update_version (app) != NULL);
+
+       source = gs_app_get_source_default (app);
+       if (g_str_has_prefix (source, "lib"))
+               source_prefix = g_strdup_printf ("lib%c", source[3]);
+       else
+               source_prefix = g_strdup_printf ("%c", source[0]);
+       current_version = gs_app_get_version (app);
+       version = gs_app_get_update_version (app);
+       uri = g_strdup_printf ("http://changelogs.ubuntu.com/changelogs/binary/%s/%s/%s/changelog";, 
source_prefix, source, version);
+       msg = soup_message_new (SOUP_METHOD_GET, uri);
+
+       status_code = soup_session_send_message (plugin->soup_session, msg);
+       if (status_code != SOUP_STATUS_OK) {
+               g_warning ("Failed to get changelog for %s version %s from changelogs.ubuntu.com: %s", 
source, version, soup_status_get_phrase (status_code));
+               return;
+       }
+
+       // Extract changelog entries newer than our current version
+       changelog_prefix = g_strdup_printf ("%s (", source);
+       lines = g_strsplit (msg->response_body->data, "\n", -1);
+       details = g_string_new ("");
+       for (i = 0; lines[i] != NULL; i++) {
+               gchar *line = lines[i];
+               int version_start, version_end;
+               g_autofree gchar *v = NULL;
+
+               // First line is in the form "package (version) distribution(s); urgency=urgency"
+               if (!g_str_has_prefix (line, changelog_prefix))
+                       continue;
+               version_start = strlen (changelog_prefix);
+               for (version_end = version_start; line[version_end] != '\0' && line[version_end] != ')'; 
version_end++);
+               v = g_strdup_printf ("%.*s", version_end - version_start, line + version_start);
+
+               // We're only interested in new versions
+               if (!version_newer (current_version, v))
+                       break;
+
+               g_string_append_printf (details, "# %s\n\n", v);
+               for (i++; lines[i] != NULL; i++) {
+                       // Last line is in the form " -- maintainer name <email address>  date"
+                       if (g_str_has_prefix (lines[i], " -- "))
+                               break;
+                       if (g_str_has_prefix (lines[i], "  "))
+                               g_string_append_printf (details, "%s\n\n", lines[i] + 2);
+                       else
+                               g_string_append_printf (details, "%s\n\n", lines[i]);
+               }
+       }
+       g_strfreev (lines);
+
+       gs_app_set_update_details (app, details->str);
+       g_string_free (details, TRUE);
+}
+
 gboolean
 gs_plugin_refine (GsPlugin *plugin,
                  GList **list,
@@ -380,14 +447,21 @@ gs_plugin_refine (GsPlugin *plugin,
 
                info = g_hash_table_lookup (plugin->priv->package_info, gs_app_get_source_default (app));
                if (info != NULL) {
-                       if (gs_app_get_size (app) == 0)
+                       if (gs_app_get_size (app) == 0) {
                                gs_app_set_size (app, info->installed_size * 1024);
-                       if (info->installed_version) {
+                       }
+                       if (info->installed_version != NULL) {
                                gs_app_set_version (app, info->installed_version);
                                if (gs_app_get_state (app) == AS_APP_STATE_UNKNOWN)
                                        gs_app_set_state (app, AS_APP_STATE_INSTALLED);
-                       } else
+                       }
+                       if (info->update_version != NULL) {
                                gs_app_set_update_version (app, info->update_version);
+                       }
+               }
+
+               if ((flags & GS_PLUGIN_REFINE_FLAGS_REQUIRE_UPDATE_DETAILS) != 0) {
+                       get_changelog (plugin, app);
                }
        }