[gnome-software] Allow storing GVariant blobs as GsApp metadata

[Richard Hughes <rhughes src gnome org>]

commit fd24b0d2d9f0e130cd27b88834aaae4c2cea3c49
Author: Richard Hughes <richard hughsie com>
Date:   Tue Oct 17 14:18:09 2017 +0100

    Allow storing GVariant blobs as GsApp metadata

 lib/gs-app.c |   96 ++++++++++++++++++++++++++++++++++++++++++++++++++--------
 lib/gs-app.h |    7 ++++-
 2 files changed, 89 insertions(+), 14 deletions(-)
---
diff --git a/lib/gs-app.c b/lib/gs-app.c
index 73991db..a832803 100644
--- a/lib/gs-app.c
+++ b/lib/gs-app.c
@@ -581,10 +581,26 @@ gs_app_to_string_append (GsApp *app, GString *str)
        }
        keys = g_hash_table_get_keys (priv->metadata);
        for (l = keys; l != NULL; l = l->next) {
+               GVariant *val;
+               const GVariantType *val_type;
                g_autofree gchar *key = NULL;
+               g_autofree gchar *val_str = NULL;
+
                key = g_strdup_printf ("{%s}", (const gchar *) l->data);
-               tmp = g_hash_table_lookup (priv->metadata, l->data);
-               gs_app_kv_lpad (str, key, tmp);
+               val = g_hash_table_lookup (priv->metadata, l->data);
+               val_type = g_variant_get_type (val);
+               if (g_variant_type_equal (val_type, G_VARIANT_TYPE_STRING)) {
+                       val_str = g_variant_dup_string (val, NULL);
+               } else if (g_variant_type_equal (val_type, G_VARIANT_TYPE_BOOLEAN)) {
+                       val_str = g_strdup (g_variant_get_boolean (val) ? "True" : "False");
+               } else if (g_variant_type_equal (val_type, G_VARIANT_TYPE_UINT32)) {
+                       val_str = g_strdup_printf ("%" G_GUINT32_FORMAT,
+                                                  g_variant_get_uint32 (val));
+               } else {
+                       val_str = g_strdup_printf ("unknown type of %s",
+                                                  g_variant_get_type_string (val));
+               }
+               gs_app_kv_lpad (str, key, val_str);
        }
        g_list_free (keys);
 
@@ -2951,30 +2967,74 @@ gs_app_set_size_installed (GsApp *app, guint64 size_installed)
 const gchar *
 gs_app_get_metadata_item (GsApp *app, const gchar *key)
 {
-       GsAppPrivate *priv = gs_app_get_instance_private (app);
+       GVariant *tmp;
        g_return_val_if_fail (GS_IS_APP (app), NULL);
        g_return_val_if_fail (key != NULL, NULL);
-       return g_hash_table_lookup (priv->metadata, key);
+       tmp = gs_app_get_metadata_variant (app, key);
+       if (tmp == NULL)
+               return NULL;
+       return g_variant_get_string (tmp, NULL);
 }
 
 /**
  * gs_app_set_metadata:
  * @app: a #GsApp
- * @key: a string, e.g. "fwupd::device-id"
+ * @key: a string, e.g. "fwupd::DeviceID"
  * @value: a string, e.g. "fubar"
  *
  * Sets some metadata for the application.
- * Is is expected that plugins namespace any plugin-specific metadata,
- * for example `fwupd::device-id`.
+ * Is is expected that plugins namespace any plugin-specific metadata.
  *
  * Since: 3.22
  **/
 void
 gs_app_set_metadata (GsApp *app, const gchar *key, const gchar *value)
 {
+       g_return_if_fail (GS_IS_APP (app));
+       g_return_if_fail (key != NULL);
+       gs_app_set_metadata_variant (app, key,
+                                    value != NULL ? g_variant_new_string (value) : NULL);
+}
+
+/**
+ * gs_app_get_metadata_variant:
+ * @app: a #GsApp
+ * @key: a string, e.g. "fwupd::device-id"
+ *
+ * Gets some metadata for the application.
+ * Is is expected that plugins namespace any plugin-specific metadata.
+ *
+ * Returns: a string, or %NULL for unset
+ *
+ * Since: 3.26
+ **/
+GVariant *
+gs_app_get_metadata_variant (GsApp *app, const gchar *key)
+{
+       GsAppPrivate *priv = gs_app_get_instance_private (app);
+       g_return_val_if_fail (GS_IS_APP (app), NULL);
+       g_return_val_if_fail (key != NULL, NULL);
+       return g_hash_table_lookup (priv->metadata, key);
+}
+
+/**
+ * gs_app_set_metadata_variant:
+ * @app: a #GsApp
+ * @key: a string, e.g. "fwupd::DeviceID"
+ * @value: a #GVariant
+ *
+ * Sets some metadata for the application.
+ * Is is expected that plugins namespace any plugin-specific metadata,
+ * for example `fwupd::device-id`.
+ *
+ * Since: 3.26
+ **/
+void
+gs_app_set_metadata_variant (GsApp *app, const gchar *key, GVariant *value)
+{
        GsAppPrivate *priv = gs_app_get_instance_private (app);
        g_autoptr(GMutexLocker) locker = g_mutex_locker_new (&priv->mutex);
-       const gchar *found;
+       GVariant *found;
 
        g_return_if_fail (GS_IS_APP (app));
 
@@ -2987,13 +3047,23 @@ gs_app_set_metadata (GsApp *app, const gchar *key, const gchar *value)
        /* check we're not overwriting */
        found = g_hash_table_lookup (priv->metadata, key);
        if (found != NULL) {
-               if (g_strcmp0 (found, value) == 0)
+               if (g_variant_equal (found, value))
                        return;
-               g_warning ("tried overwriting %s key %s from %s to %s",
-                          priv->id, key, found, value);
+               if (g_variant_type_equal (g_variant_get_type (value), G_VARIANT_TYPE_STRING) &&
+                   g_variant_type_equal (g_variant_get_type (found), G_VARIANT_TYPE_STRING)) {
+                       g_warning ("tried overwriting %s key %s from %s to %s",
+                                  priv->id, key,
+                                  g_variant_get_string (found, NULL),
+                                  g_variant_get_string (value, NULL));
+               } else {
+                       g_warning ("tried overwriting %s key %s (%s->%s)",
+                                  priv->id, key,
+                                  g_variant_get_type_string (found),
+                                  g_variant_get_type_string (value));
+               }
                return;
        }
-       g_hash_table_insert (priv->metadata, g_strdup (key), g_strdup (value));
+       g_hash_table_insert (priv->metadata, g_strdup (key), g_variant_ref (value));
 }
 
 /**
@@ -4038,7 +4108,7 @@ gs_app_init (GsApp *app)
        priv->metadata = g_hash_table_new_full (g_str_hash,
                                                g_str_equal,
                                                g_free,
-                                               g_free);
+                                               (GDestroyNotify) g_variant_unref);
        priv->addons_hash = g_hash_table_new_full (g_str_hash,
                                                   g_str_equal,
                                                   g_free,
diff --git a/lib/gs-app.h b/lib/gs-app.h
index 508d6a2..6876bf8 100644
--- a/lib/gs-app.h
+++ b/lib/gs-app.h
@@ -1,6 +1,6 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
  *
- * Copyright (C) 2013-2016 Richard Hughes <richard hughsie com>
+ * Copyright (C) 2013-2017 Richard Hughes <richard hughsie com>
  *
  * Licensed under the GNU General Public License Version 2
  *
@@ -239,9 +239,14 @@ void                gs_app_set_runtime             (GsApp          *app,
                                                 GsApp          *runtime);
 const gchar    *gs_app_get_metadata_item       (GsApp          *app,
                                                 const gchar    *key);
+GVariant       *gs_app_get_metadata_variant    (GsApp          *app,
+                                                const gchar    *key);
 void            gs_app_set_metadata            (GsApp          *app,
                                                 const gchar    *key,
                                                 const gchar    *value);
+void            gs_app_set_metadata_variant    (GsApp          *app,
+                                                const gchar    *key,
+                                                GVariant       *value);
 gint            gs_app_get_rating              (GsApp          *app);
 void            gs_app_set_rating              (GsApp          *app,
                                                 gint            rating);