[gnome-software/wip/rancell/paid: 2/2] snap: Add support for paid snaps

[Robert Ancell <rancell src gnome org>]

commit 98bb59d6406dbb9e1a450d22db432cf17d6d9f83
Author: Robert Ancell <robert ancell canonical com>
Date:   Tue Jul 5 15:22:42 2016 +1200

    snap: Add support for paid snaps

 src/plugins/gs-plugin-snap.c |  162 +++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 160 insertions(+), 2 deletions(-)
---
diff --git a/src/plugins/gs-plugin-snap.c b/src/plugins/gs-plugin-snap.c
index 0104104..6464bfe 100644
--- a/src/plugins/gs-plugin-snap.c
+++ b/src/plugins/gs-plugin-snap.c
@@ -143,12 +143,15 @@ refine_app (GsPlugin *plugin, GsApp *app, JsonObject *package, gboolean from_sea
 {
        g_autofree gchar *macaroon = NULL;
        g_auto(GStrv) discharges = NULL;
-       const gchar *status, *icon_url, *launch_name = NULL;
+       const gchar *id, *status, *icon_url, *launch_name = NULL;
        g_autoptr(GdkPixbuf) icon_pixbuf = NULL;
        gint64 size = -1;
 
        get_macaroon (plugin, &macaroon, &discharges);
 
+       id = json_object_get_string_member (package, "id");
+       gs_app_set_metadata (app, "snap::id", id);
+
        status = json_object_get_string_member (package, "status");
        if (g_strcmp0 (status, "installed") == 0 || g_strcmp0 (status, "active") == 0) {
                const gchar *update_available;
@@ -162,8 +165,10 @@ refine_app (GsPlugin *plugin, GsApp *app, JsonObject *package, gboolean from_sea
                                gs_app_set_state (app, AS_APP_STATE_UNKNOWN);
                        gs_app_set_state (app, AS_APP_STATE_INSTALLED);
                }
-       } else if (g_strcmp0 (status, "not installed") == 0 || g_strcmp0 (status, "available") == 0) {
+       } else if (g_strcmp0 (status, "available") == 0) {
                gs_app_set_state (app, AS_APP_STATE_AVAILABLE);
+       } else if (g_strcmp0 (status, "priced") == 0) {
+               gs_app_set_state (app, AS_APP_STATE_PURCHASABLE);
        }
        gs_app_set_name (app, GS_APP_QUALITY_HIGHEST,
                         json_object_get_string_member (package, "summary"));
@@ -180,6 +185,18 @@ refine_app (GsPlugin *plugin, GsApp *app, JsonObject *package, gboolean from_sea
                if (size > 0)
                        gs_app_set_size_download (app, size);
        }
+       if (json_object_has_member (package, "prices")) {
+               JsonObject *prices;
+               JsonObjectIter iter;
+               const gchar *currency;
+               JsonNode *amount;
+
+               prices = json_object_get_object_member (package, "prices");
+               json_object_iter_init (&iter, prices);
+               while (json_object_iter_next (&iter, &currency, &amount)) {
+                       gs_app_add_price (app, json_node_get_double (amount), currency);
+               }
+       }
        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, "/")) {
@@ -587,6 +604,147 @@ send_package_action (GsPlugin *plugin,
 }
 
 gboolean
+gs_plugin_add_payment_methods (GsPlugin *plugin,
+                              GsPaymentMethodList *payment_methods,
+                              GCancellable *cancellable,
+                              GError **error)
+{
+       guint status_code;
+       g_autofree gchar *reason_phrase = NULL;
+       g_autofree gchar *response_type = NULL;
+       g_autofree gchar *response = NULL;
+       g_autoptr(JsonParser) parser = NULL;
+       JsonObject *root;
+       JsonArray *result;
+       GList *methods, *l;
+
+       if (!gs_snapd_request ("POST", "/v2/buy/methods", NULL,
+                              NULL, NULL,
+                              &status_code, &reason_phrase,
+                              &response_type, &response, NULL,
+                              cancellable, error))
+               return FALSE;
+
+       if (status_code == SOUP_STATUS_UNAUTHORIZED) {
+               g_set_error_literal (error,
+                                    GS_PLUGIN_ERROR,
+                                    GS_PLUGIN_ERROR_AUTH_REQUIRED,
+                                    "Requires authentication with @snapd");
+               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");
+       methods = json_array_get_elements (result);
+
+       for (l = methods; l != NULL; l = l->next) {
+               JsonObject *method = json_node_get_object (l->data);
+               const gchar *description, *id, *backend_id;
+               GsPaymentMethod *payment_method;
+
+               payment_method = gs_payment_method_new ();
+               gs_payment_method_list_add (payment_methods, payment_method);
+
+               description = json_object_get_string_member (method, "description");
+               gs_payment_method_set_description (payment_method, description);
+               id = json_object_get_string_member (method, "id");
+               gs_payment_method_add_metadata (payment_method, "snap::id", id);
+               backend_id = json_object_get_string_member (method, "backend-id");
+               gs_payment_method_add_metadata (payment_method, "snap::backend-id", backend_id);
+       }
+
+       g_list_free (methods);
+
+       return TRUE;
+}
+
+gboolean
+gs_plugin_app_purchase (GsPlugin *plugin,
+                       GsApp *app,
+                       GsPrice *price,
+                       GsPaymentMethod *payment_method,
+                       GCancellable *cancellable,
+                       GError **error)
+{
+       g_autoptr(JsonBuilder) builder = NULL;
+       g_autofree gchar *value = NULL;
+       g_autoptr(JsonNode) json_root = NULL;
+       g_autoptr(JsonGenerator) json_generator = NULL;
+       g_autofree gchar *data = NULL;
+       guint status_code;
+       g_autofree gchar *reason_phrase = NULL;
+       g_autofree gchar *response_type = NULL;
+       g_autofree gchar *response = NULL;
+
+       /* We can only buy apps we know of */
+       if (g_strcmp0 (gs_app_get_management_plugin (app), "snap") != 0)
+               return TRUE;
+
+       builder = json_builder_new ();
+       json_builder_begin_object (builder);
+       json_builder_set_member_name (builder, "snap-id");
+       json_builder_add_string_value (builder, gs_app_get_metadata_item (app, "snap::id"));
+       json_builder_set_member_name (builder, "snap-name");
+       json_builder_add_string_value (builder, gs_app_get_id (app));
+       json_builder_set_member_name (builder, "snap-price");
+       value = g_strdup_printf ("%f", gs_price_get_amount (price));
+       json_builder_add_string_value (builder, value);
+       json_builder_set_member_name (builder, "currency");
+       json_builder_add_string_value (builder, gs_price_get_currency (price));
+       json_builder_end_object (builder);
+
+       json_root = json_builder_get_root (builder);
+       json_generator = json_generator_new ();
+       json_generator_set_pretty (json_generator, TRUE);
+       json_generator_set_root (json_generator, json_root);
+       data = json_generator_to_data (json_generator, NULL);
+       if (data == NULL) {
+               g_set_error_literal (error,
+                                    GS_PLUGIN_ERROR,
+                                    GS_PLUGIN_ERROR_FAILED,
+                                    "Failed to generate JSON request");
+               return FALSE;
+       }
+
+       if (!gs_snapd_request ("POST", "/v2/buy/methods", NULL,
+                              NULL, NULL,
+                              &status_code, &reason_phrase,
+                              &response_type, &response, NULL,
+                              cancellable, error))
+               return FALSE;
+
+       /*if (!gs_snapd_request ("POST", "/v2/buy", data,
+                              NULL, NULL,
+                              &status_code, &reason_phrase,
+                              &response_type, &response, NULL,
+                              cancellable, error))
+               return FALSE;*/
+
+       if (status_code != SOUP_STATUS_OK) {
+               // FIXME
+               return FALSE;
+       }
+  g_printerr ("'%s'\n", response);
+
+       gs_app_set_state (app, AS_APP_STATE_PURCHASING);
+       gs_app_set_state (app, AS_APP_STATE_AVAILABLE);
+       return TRUE;
+}
+
+gboolean
 gs_plugin_app_install (GsPlugin *plugin,
                       GsApp *app,
                       GCancellable *cancellable,