app-filter: Add serialize and deserialize methods
Add methods to serialise and deserialise the app filter, and use them to replace the code in `MctManager` which was previously doing this. This exposes the variant format for the app filter in the API (although the format is described as ‘opaque’) so that user code can log it or store it separately. Signed-off-by: Philip Withnall <withnall@endlessm.com>
This commit is contained in:
parent
a617365bba
commit
cba851fc27
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@ -96,7 +96,7 @@ mct_app_filter_unref (MctAppFilter *filter)
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*
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* Get the user ID of the user this #MctAppFilter is for.
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*
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* Returns: user ID of the relevant user
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* Returns: user ID of the relevant user, or `(uid_t) -1` if unknown
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* Since: 0.2.0
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*/
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uid_t
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@ -533,6 +533,174 @@ mct_app_filter_is_system_installation_allowed (MctAppFilter *filter)
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return filter->allow_system_installation;
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}
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/**
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* _mct_app_filter_build_app_filter_variant:
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* @filter: an #MctAppFilter
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*
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* Build a #GVariant which contains the app filter from @filter, in the format
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* used for storing it in AccountsService.
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*
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* Returns: (transfer floating): a new, floating #GVariant containing the app
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* filter
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*/
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static GVariant *
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_mct_app_filter_build_app_filter_variant (MctAppFilter *filter)
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{
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g_auto(GVariantBuilder) builder = G_VARIANT_BUILDER_INIT (G_VARIANT_TYPE ("(bas)"));
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g_return_val_if_fail (filter != NULL, NULL);
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g_return_val_if_fail (filter->ref_count >= 1, NULL);
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g_variant_builder_add (&builder, "b",
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(filter->app_list_type == MCT_APP_FILTER_LIST_WHITELIST));
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g_variant_builder_open (&builder, G_VARIANT_TYPE ("as"));
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for (gsize i = 0; filter->app_list[i] != NULL; i++)
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g_variant_builder_add (&builder, "s", filter->app_list[i]);
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g_variant_builder_close (&builder);
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return g_variant_builder_end (&builder);
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}
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/**
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* mct_app_filter_serialize:
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* @filter: an #MctAppFilter
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*
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* Build a #GVariant which contains the app filter from @filter, in an opaque
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* variant format. This format may change in future, but
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* mct_app_filter_deserialize() is guaranteed to always be able to load any
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* variant produced by the current or any previous version of
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* mct_app_filter_serialize().
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*
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* Returns: (transfer floating): a new, floating #GVariant containing the app
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* filter
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* Since: 0.7.0
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*/
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GVariant *
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mct_app_filter_serialize (MctAppFilter *filter)
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{
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g_auto(GVariantBuilder) builder = G_VARIANT_BUILDER_INIT (G_VARIANT_TYPE ("a{sv}"));
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g_return_val_if_fail (filter != NULL, NULL);
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g_return_val_if_fail (filter->ref_count >= 1, NULL);
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/* The serialisation format is exactly the
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* `com.endlessm.ParentalControls.AppFilter` D-Bus interface. */
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g_variant_builder_add (&builder, "{sv}", "AppFilter",
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_mct_app_filter_build_app_filter_variant (filter));
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g_variant_builder_add (&builder, "{sv}", "OarsFilter",
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g_variant_new ("(s@a{ss})", "oars-1.1",
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filter->oars_ratings));
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g_variant_builder_add (&builder, "{sv}", "AllowUserInstallation",
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g_variant_new_boolean (filter->allow_user_installation));
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g_variant_builder_add (&builder, "{sv}", "AllowSystemInstallation",
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g_variant_new_boolean (filter->allow_system_installation));
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return g_variant_builder_end (&builder);
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}
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/**
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* mct_app_filter_deserialize:
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* @variant: a serialized app filter variant
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* @user_id: the ID of the user the app filter relates to
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* @error: return location for a #GError, or %NULL
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*
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* Deserialize an app filter previously serialized with
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* mct_app_filter_serialize(). This function guarantees to be able to
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* deserialize any serialized form from this version or older versions of
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* libmalcontent.
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*
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* If deserialization fails, %MCT_MANAGER_ERROR_INVALID_DATA will be returned.
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*
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* Returns: (transfer full): deserialized app filter
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* Since: 0.7.0
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*/
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MctAppFilter *
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mct_app_filter_deserialize (GVariant *variant,
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uid_t user_id,
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GError **error)
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{
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gboolean is_whitelist;
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g_auto(GStrv) app_list = NULL;
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const gchar *content_rating_kind;
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g_autoptr(GVariant) oars_variant = NULL;
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gboolean allow_user_installation;
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gboolean allow_system_installation;
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g_autoptr(MctAppFilter) app_filter = NULL;
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g_return_val_if_fail (variant != NULL, NULL);
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g_return_val_if_fail (error == NULL || *error == NULL, NULL);
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/* Check the overall type. */
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if (!g_variant_is_of_type (variant, G_VARIANT_TYPE ("a{sv}")))
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{
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g_set_error (error, MCT_MANAGER_ERROR,
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MCT_MANAGER_ERROR_INVALID_DATA,
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_("App filter for user %u was in an unrecognized format"),
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(guint) user_id);
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return NULL;
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}
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/* Extract the properties we care about. The default values here should be
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* kept in sync with those in the `com.endlessm.ParentalControls.AppFilter`
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* D-Bus interface. */
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if (!g_variant_lookup (variant, "AppFilter", "(b^as)",
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&is_whitelist, &app_list))
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{
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/* Default value. */
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is_whitelist = FALSE;
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app_list = g_new0 (gchar *, 1);
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}
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if (!g_variant_lookup (variant, "OarsFilter", "(&s@a{ss})",
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&content_rating_kind, &oars_variant))
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{
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/* Default value. */
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content_rating_kind = "oars-1.1";
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oars_variant = g_variant_new ("a{ss}", NULL);
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}
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/* Check that the OARS filter is in a format we support. Currently, that’s
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* only oars-1.0 and oars-1.1. */
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if (!g_str_equal (content_rating_kind, "oars-1.0") &&
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!g_str_equal (content_rating_kind, "oars-1.1"))
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{
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g_set_error (error, MCT_MANAGER_ERROR,
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MCT_MANAGER_ERROR_INVALID_DATA,
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_("OARS filter for user %u has an unrecognized kind ‘%s’"),
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(guint) user_id, content_rating_kind);
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return NULL;
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}
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if (!g_variant_lookup (variant, "AllowUserInstallation", "b",
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&allow_user_installation))
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{
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/* Default value. */
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allow_user_installation = TRUE;
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}
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if (!g_variant_lookup (variant, "AllowSystemInstallation", "b",
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&allow_system_installation))
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{
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/* Default value. */
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allow_system_installation = FALSE;
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}
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/* Success. Create an #MctAppFilter object to contain the results. */
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app_filter = g_new0 (MctAppFilter, 1);
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app_filter->ref_count = 1;
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app_filter->user_id = user_id;
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app_filter->app_list = g_steal_pointer (&app_list);
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app_filter->app_list_type =
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is_whitelist ? MCT_APP_FILTER_LIST_WHITELIST : MCT_APP_FILTER_LIST_BLACKLIST;
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app_filter->oars_ratings = g_steal_pointer (&oars_variant);
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app_filter->allow_user_installation = allow_user_installation;
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app_filter->allow_system_installation = allow_system_installation;
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return g_steal_pointer (&app_filter);
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}
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/*
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* Actual implementation of #MctAppFilterBuilder.
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*
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@ -96,6 +96,11 @@ MctAppFilterOarsValue mct_app_filter_get_oars_value (MctAppFilter *filter,
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gboolean mct_app_filter_is_user_installation_allowed (MctAppFilter *filter);
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gboolean mct_app_filter_is_system_installation_allowed (MctAppFilter *filter);
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GVariant *mct_app_filter_serialize (MctAppFilter *filter);
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MctAppFilter *mct_app_filter_deserialize (GVariant *variant,
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uid_t user_id,
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GError **error);
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/**
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* MctAppFilterBuilder:
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*
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@ -257,37 +257,6 @@ _mct_manager_user_changed_cb (GDBusConnection *connection,
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g_signal_emit_by_name (manager, "app-filter-changed", uid);
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}
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/**
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* _mct_app_filter_build_app_filter_variant:
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* @filter: an #MctAppFilter
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*
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* Build a #GVariant which contains the app filter from @filter, in the format
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* used for storing it in AccountsService.
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*
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* Returns: (transfer floating): a new, floating #GVariant containing the app
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* filter
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* Since: 0.2.0
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*/
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static GVariant *
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_mct_app_filter_build_app_filter_variant (MctAppFilter *filter)
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{
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g_auto(GVariantBuilder) builder = G_VARIANT_BUILDER_INIT (G_VARIANT_TYPE ("(bas)"));
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g_return_val_if_fail (filter != NULL, NULL);
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g_return_val_if_fail (filter->ref_count >= 1, NULL);
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g_variant_builder_add (&builder, "b",
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(filter->app_list_type == MCT_APP_FILTER_LIST_WHITELIST));
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g_variant_builder_open (&builder, G_VARIANT_TYPE ("as"));
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for (gsize i = 0; filter->app_list[i] != NULL; i++)
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g_variant_builder_add (&builder, "s", filter->app_list[i]);
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g_variant_builder_close (&builder);
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return g_variant_builder_end (&builder);
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}
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/* Check if @error is a D-Bus remote error matching @expected_error_name. */
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static gboolean
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bus_remote_error_matches (const GError *error,
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@ -386,13 +355,6 @@ mct_manager_get_app_filter (MctManager *self,
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g_autoptr(GVariant) result_variant = NULL;
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g_autoptr(GVariant) properties = NULL;
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g_autoptr(GError) local_error = NULL;
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g_autoptr(MctAppFilter) app_filter = NULL;
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gboolean is_whitelist;
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g_auto(GStrv) app_list = NULL;
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const gchar *content_rating_kind;
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g_autoptr(GVariant) oars_variant = NULL;
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gboolean allow_user_installation;
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gboolean allow_system_installation;
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g_return_val_if_fail (MCT_IS_MANAGER (self), NULL);
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g_return_val_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable), NULL);
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/* Extract the properties we care about. They may be silently omitted from the
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* results if we don’t have permission to access them. */
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properties = g_variant_get_child_value (result_variant, 0);
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if (!g_variant_lookup (properties, "AppFilter", "(b^as)",
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&is_whitelist, &app_list))
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if (!g_variant_lookup (properties, "AppFilter", "(b^as)", NULL, NULL))
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{
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g_set_error (error, MCT_MANAGER_ERROR,
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MCT_MANAGER_ERROR_PERMISSION_DENIED,
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return NULL;
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}
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if (!g_variant_lookup (properties, "OarsFilter", "(&s@a{ss})",
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&content_rating_kind, &oars_variant))
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{
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/* Default value. */
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content_rating_kind = "oars-1.1";
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oars_variant = g_variant_new ("a{ss}", NULL);
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}
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/* Check that the OARS filter is in a format we support. Currently, that’s
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* only oars-1.0 and oars-1.1. */
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if (!g_str_equal (content_rating_kind, "oars-1.0") &&
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!g_str_equal (content_rating_kind, "oars-1.1"))
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{
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g_set_error (error, MCT_MANAGER_ERROR,
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MCT_MANAGER_ERROR_INVALID_DATA,
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_("OARS filter for user %u has an unrecognized kind ‘%s’"),
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(guint) user_id, content_rating_kind);
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return NULL;
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}
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if (!g_variant_lookup (properties, "AllowUserInstallation", "b",
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&allow_user_installation))
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{
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/* Default value. */
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allow_user_installation = TRUE;
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}
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if (!g_variant_lookup (properties, "AllowSystemInstallation", "b",
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&allow_system_installation))
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{
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/* Default value. */
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allow_system_installation = FALSE;
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}
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/* Success. Create an #MctAppFilter object to contain the results. */
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app_filter = g_new0 (MctAppFilter, 1);
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app_filter->ref_count = 1;
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app_filter->user_id = user_id;
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app_filter->app_list = g_steal_pointer (&app_list);
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app_filter->app_list_type =
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is_whitelist ? MCT_APP_FILTER_LIST_WHITELIST : MCT_APP_FILTER_LIST_BLACKLIST;
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app_filter->oars_ratings = g_steal_pointer (&oars_variant);
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app_filter->allow_user_installation = allow_user_installation;
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app_filter->allow_system_installation = allow_system_installation;
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return g_steal_pointer (&app_filter);
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return mct_app_filter_deserialize (properties, user_id, error);
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}
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static void get_app_filter_thread_cb (GTask *task,
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@ -632,14 +548,10 @@ mct_manager_set_app_filter (MctManager *self,
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GError **error)
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{
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g_autofree gchar *object_path = NULL;
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g_autoptr(GVariant) app_filter_variant = NULL;
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g_autoptr(GVariant) oars_filter_variant = NULL;
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g_autoptr(GVariant) allow_user_installation_variant = NULL;
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g_autoptr(GVariant) allow_system_installation_variant = NULL;
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g_autoptr(GVariant) app_filter_result_variant = NULL;
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g_autoptr(GVariant) oars_filter_result_variant = NULL;
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g_autoptr(GVariant) allow_user_installation_result_variant = NULL;
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g_autoptr(GVariant) allow_system_installation_result_variant = NULL;
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g_autoptr(GVariant) properties_variant = NULL;
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g_autoptr(GVariant) properties_value = NULL;
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const gchar *properties_key = NULL;
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GVariantIter iter;
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g_autoptr(GError) local_error = NULL;
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g_return_val_if_fail (MCT_IS_MANAGER (self), FALSE);
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@ -654,13 +566,14 @@ mct_manager_set_app_filter (MctManager *self,
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if (object_path == NULL)
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return FALSE;
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app_filter_variant = _mct_app_filter_build_app_filter_variant (app_filter);
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oars_filter_variant = g_variant_new ("(s@a{ss})", "oars-1.1",
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app_filter->oars_ratings);
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allow_user_installation_variant = g_variant_new_boolean (app_filter->allow_user_installation);
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allow_system_installation_variant = g_variant_new_boolean (app_filter->allow_system_installation);
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properties_variant = mct_app_filter_serialize (app_filter);
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app_filter_result_variant =
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g_variant_iter_init (&iter, properties_variant);
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while (g_variant_iter_loop (&iter, "{&sv}", &properties_key, &properties_value))
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{
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g_autoptr(GVariant) result_variant = NULL;
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result_variant =
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g_dbus_connection_call_sync (self->connection,
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"org.freedesktop.Accounts",
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object_path,
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@ -668,8 +581,8 @@ mct_manager_set_app_filter (MctManager *self,
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"Set",
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g_variant_new ("(ssv)",
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"com.endlessm.ParentalControls.AppFilter",
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"AppFilter",
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g_steal_pointer (&app_filter_variant)),
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properties_key,
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properties_value),
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G_VARIANT_TYPE ("()"),
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(flags & MCT_MANAGER_SET_VALUE_FLAGS_INTERACTIVE)
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? G_DBUS_CALL_FLAGS_ALLOW_INTERACTIVE_AUTHORIZATION
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@ -682,74 +595,6 @@ mct_manager_set_app_filter (MctManager *self,
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g_propagate_error (error, bus_error_to_manager_error (local_error, user_id));
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return FALSE;
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}
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oars_filter_result_variant =
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g_dbus_connection_call_sync (self->connection,
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"org.freedesktop.Accounts",
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object_path,
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"org.freedesktop.DBus.Properties",
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"Set",
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g_variant_new ("(ssv)",
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"com.endlessm.ParentalControls.AppFilter",
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"OarsFilter",
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g_steal_pointer (&oars_filter_variant)),
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G_VARIANT_TYPE ("()"),
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(flags & MCT_MANAGER_SET_VALUE_FLAGS_INTERACTIVE)
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? G_DBUS_CALL_FLAGS_ALLOW_INTERACTIVE_AUTHORIZATION
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: G_DBUS_CALL_FLAGS_NONE,
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-1, /* timeout, ms */
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cancellable,
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&local_error);
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if (local_error != NULL)
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{
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g_propagate_error (error, bus_error_to_manager_error (local_error, user_id));
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return FALSE;
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}
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allow_user_installation_result_variant =
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g_dbus_connection_call_sync (self->connection,
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"org.freedesktop.Accounts",
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object_path,
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"org.freedesktop.DBus.Properties",
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"Set",
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g_variant_new ("(ssv)",
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"com.endlessm.ParentalControls.AppFilter",
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"AllowUserInstallation",
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g_steal_pointer (&allow_user_installation_variant)),
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G_VARIANT_TYPE ("()"),
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(flags & MCT_MANAGER_SET_VALUE_FLAGS_INTERACTIVE)
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? G_DBUS_CALL_FLAGS_ALLOW_INTERACTIVE_AUTHORIZATION
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: G_DBUS_CALL_FLAGS_NONE,
|
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-1, /* timeout, ms */
|
||||
cancellable,
|
||||
&local_error);
|
||||
if (local_error != NULL)
|
||||
{
|
||||
g_propagate_error (error, bus_error_to_manager_error (local_error, user_id));
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
allow_system_installation_result_variant =
|
||||
g_dbus_connection_call_sync (self->connection,
|
||||
"org.freedesktop.Accounts",
|
||||
object_path,
|
||||
"org.freedesktop.DBus.Properties",
|
||||
"Set",
|
||||
g_variant_new ("(ssv)",
|
||||
"com.endlessm.ParentalControls.AppFilter",
|
||||
"AllowSystemInstallation",
|
||||
g_steal_pointer (&allow_system_installation_variant)),
|
||||
G_VARIANT_TYPE ("()"),
|
||||
(flags & MCT_MANAGER_SET_VALUE_FLAGS_INTERACTIVE)
|
||||
? G_DBUS_CALL_FLAGS_ALLOW_INTERACTIVE_AUTHORIZATION
|
||||
: G_DBUS_CALL_FLAGS_NONE,
|
||||
-1, /* timeout, ms */
|
||||
cancellable,
|
||||
&local_error);
|
||||
if (local_error != NULL)
|
||||
{
|
||||
g_propagate_error (error, bus_error_to_manager_error (local_error, user_id));
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
return TRUE;
|
||||
|
|
|
@ -85,6 +85,83 @@ test_app_filter_refs (void)
|
|||
/* Final ref is dropped by g_autoptr(). */
|
||||
}
|
||||
|
||||
/* Basic test of mct_app_filter_serialize() on an app filter. */
|
||||
static void
|
||||
test_app_filter_serialize (void)
|
||||
{
|
||||
g_auto(MctAppFilterBuilder) builder = MCT_APP_FILTER_BUILDER_INIT ();
|
||||
g_autoptr(MctAppFilter) filter = NULL;
|
||||
g_autoptr(GVariant) serialized = NULL;
|
||||
|
||||
/* Use an empty #MctAppFilter. */
|
||||
filter = mct_app_filter_builder_end (&builder);
|
||||
|
||||
/* We can’t assert anything about the serialisation format, since it’s opaque. */
|
||||
serialized = mct_app_filter_serialize (filter);
|
||||
g_assert_nonnull (serialized);
|
||||
}
|
||||
|
||||
/* Basic test of mct_app_filter_deserialize() on various current and historic
|
||||
* serialised app filter variants. */
|
||||
static void
|
||||
test_app_filter_deserialize (void)
|
||||
{
|
||||
/* These are all opaque. Older versions should be kept around to test
|
||||
* backwards compatibility. */
|
||||
const gchar *valid_app_filters[] =
|
||||
{
|
||||
"@a{sv} {}",
|
||||
"{ 'AppFilter': <(true, @as [])> }",
|
||||
"{ 'OarsFilter': <('oars-1.1', { 'violence-cartoon': 'mild' })> }",
|
||||
"{ 'AllowUserInstallation': <true> }",
|
||||
"{ 'AllowSystemInstallation': <true> }",
|
||||
};
|
||||
|
||||
for (gsize i = 0; i < G_N_ELEMENTS (valid_app_filters); i++)
|
||||
{
|
||||
g_autoptr(GVariant) serialized = NULL;
|
||||
g_autoptr(MctAppFilter) filter = NULL;
|
||||
g_autoptr(GError) local_error = NULL;
|
||||
|
||||
g_test_message ("%" G_GSIZE_FORMAT ": %s", i, valid_app_filters[i]);
|
||||
|
||||
serialized = g_variant_parse (NULL, valid_app_filters[i], NULL, NULL, NULL);
|
||||
g_assert (serialized != NULL);
|
||||
|
||||
filter = mct_app_filter_deserialize (serialized, 1, &local_error);
|
||||
g_assert_no_error (local_error);
|
||||
g_assert_nonnull (filter);
|
||||
}
|
||||
}
|
||||
|
||||
/* Test of mct_app_filter_deserialize() on various invalid variants. */
|
||||
static void
|
||||
test_app_filter_deserialize_invalid (void)
|
||||
{
|
||||
const gchar *invalid_app_filters[] =
|
||||
{
|
||||
"false",
|
||||
"()",
|
||||
"{ 'OarsFilter': <('invalid', { 'violence-cartoon': 'mild' })> }",
|
||||
};
|
||||
|
||||
for (gsize i = 0; i < G_N_ELEMENTS (invalid_app_filters); i++)
|
||||
{
|
||||
g_autoptr(GVariant) serialized = NULL;
|
||||
g_autoptr(MctAppFilter) filter = NULL;
|
||||
g_autoptr(GError) local_error = NULL;
|
||||
|
||||
g_test_message ("%" G_GSIZE_FORMAT ": %s", i, invalid_app_filters[i]);
|
||||
|
||||
serialized = g_variant_parse (NULL, invalid_app_filters[i], NULL, NULL, NULL);
|
||||
g_assert (serialized != NULL);
|
||||
|
||||
filter = mct_app_filter_deserialize (serialized, 1, &local_error);
|
||||
g_assert_error (local_error, MCT_MANAGER_ERROR, MCT_MANAGER_ERROR_INVALID_DATA);
|
||||
g_assert_null (filter);
|
||||
}
|
||||
}
|
||||
|
||||
/* Fixture for tests which use an #MctAppFilterBuilder. The builder can either
|
||||
* be heap- or stack-allocated. @builder will always be a valid pointer to it.
|
||||
*/
|
||||
|
@ -1381,6 +1458,10 @@ main (int argc,
|
|||
g_test_add_func ("/app-filter/types", test_app_filter_types);
|
||||
g_test_add_func ("/app-filter/refs", test_app_filter_refs);
|
||||
|
||||
g_test_add_func ("/app-filter/serialize", test_app_filter_serialize);
|
||||
g_test_add_func ("/app-filter/deserialize", test_app_filter_deserialize);
|
||||
g_test_add_func ("/app-filter/deserialize/invalid", test_app_filter_deserialize_invalid);
|
||||
|
||||
g_test_add ("/app-filter/builder/stack/non-empty", BuilderFixture, NULL,
|
||||
builder_set_up_stack, test_app_filter_builder_non_empty,
|
||||
builder_tear_down_stack);
|
||||
|
|
Loading…
Reference in New Issue