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- // Copyright 2014 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
-
- // Custom binding for the Permissions API.
-
- var binding = require('binding').Binding.create('permissions');
-
- var Event = require('event_bindings').Event;
-
- // These custom binding are only necessary because it is not currently
- // possible to have a union of types as the type of the items in an array.
- // Once that is fixed, this entire file should go away.
- // See,
- // https://code.google.com/p/chromium/issues/detail?id=162044
- // https://code.google.com/p/chromium/issues/detail?id=162042
- // TODO(bryeung): delete this file.
- binding.registerCustomHook(function(api) {
- var apiFunctions = api.apiFunctions;
- var permissions = api.compiledApi;
-
- function maybeConvertToObject(str) {
- var parts = $String.split(str, '|');
- if (parts.length != 2)
- return str;
-
- var ret = {};
- ret[parts[0]] = JSON.parse(parts[1]);
- return ret;
- }
-
- function convertObjectPermissionsToStrings() {
- if (arguments.length < 1)
- return arguments;
-
- var args = arguments[0].permissions;
- if (!args)
- return arguments;
-
- for (var i = 0; i < args.length; i += 1) {
- if (typeof(args[i]) == 'object') {
- var a = args[i];
- var keys = $Object.keys(a);
- if (keys.length != 1) {
- throw new Error("Too many keys in object-style permission.");
- }
- arguments[0].permissions[i] = keys[0] + '|' +
- JSON.stringify(a[keys[0]]);
- }
- }
-
- return arguments;
- }
-
- // Convert complex permissions to strings so they validate against the schema
- apiFunctions.setUpdateArgumentsPreValidate(
- 'contains', convertObjectPermissionsToStrings);
- apiFunctions.setUpdateArgumentsPreValidate(
- 'remove', convertObjectPermissionsToStrings);
- apiFunctions.setUpdateArgumentsPreValidate(
- 'request', convertObjectPermissionsToStrings);
-
- // Convert complex permissions back to objects
- apiFunctions.setCustomCallback('getAll',
- function(name, request, response) {
- for (var i = 0; i < response.permissions.length; i += 1) {
- response.permissions[i] =
- maybeConvertToObject(response.permissions[i]);
- }
-
- // Since the schema says Permissions.permissions contains strings and
- // not objects, validation will fail after the for-loop above. This
- // skips validation and calls the callback directly, then clears it so
- // that handleResponse doesn't call it again.
- try {
- if (request.callback)
- $Function.apply(request.callback, request, [response]);
- } finally {
- delete request.callback;
- }
- });
-
- // Also convert complex permissions back to objects for events. The
- // dispatchToListener call happens after argument validation, which works
- // around the problem that Permissions.permissions is supposed to be a list
- // of strings.
- permissions.onAdded.dispatchToListener = function(callback, args) {
- for (var i = 0; i < args[0].permissions.length; i += 1) {
- args[0].permissions[i] = maybeConvertToObject(args[0].permissions[i]);
- }
- $Function.call(Event.prototype.dispatchToListener, this, callback, args);
- };
- permissions.onRemoved.dispatchToListener =
- permissions.onAdded.dispatchToListener;
- });
-
- exports.binding = binding.generate();
-