84 lines
3.3 KiB
JavaScript
84 lines
3.3 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @providesModule BatchedBridgeFactory
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*/
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'use strict';
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var invariant = require('invariant');
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var keyMirror = require('keyMirror');
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var mapObject = require('mapObject');
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var warning = require('warning');
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var slice = Array.prototype.slice;
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var MethodTypes = keyMirror({
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remote: null,
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local: null,
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});
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/**
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* Creates remotely invokable modules.
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*/
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var BatchedBridgeFactory = {
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MethodTypes: MethodTypes,
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/**
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* @param {MessageQueue} messageQueue Message queue that has been created with
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* the `moduleConfig` (among others perhaps).
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* @param {object} moduleConfig Configuration of module names/method
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* names to callback types.
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* @return {object} Remote representation of configured module.
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*/
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_createBridgedModule: function(messageQueue, moduleConfig, moduleName) {
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var remoteModule = mapObject(moduleConfig.methods, function(methodConfig, memberName) {
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return methodConfig.type === MethodTypes.local ? null : function() {
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var lastArg = arguments.length > 0 ? arguments[arguments.length - 1] : null;
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var secondLastArg = arguments.length > 1 ? arguments[arguments.length - 2] : null;
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var hasSuccCB = typeof lastArg === 'function';
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var hasErrorCB = typeof secondLastArg === 'function';
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hasErrorCB && invariant(
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hasSuccCB,
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'Cannot have a non-function arg after a function arg.'
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);
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var numCBs = (hasSuccCB ? 1 : 0) + (hasErrorCB ? 1 : 0);
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var args = slice.call(arguments, 0, arguments.length - numCBs);
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var onSucc = hasSuccCB ? lastArg : null;
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var onFail = hasErrorCB ? secondLastArg : null;
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return messageQueue.call(moduleName, memberName, args, onFail, onSucc);
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};
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});
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for (var constName in moduleConfig.constants) {
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warning(!remoteModule[constName], 'saw constant and method named %s', constName);
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remoteModule[constName] = moduleConfig.constants[constName];
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}
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return remoteModule;
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},
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create: function(MessageQueue, modulesConfig, localModulesConfig) {
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var messageQueue = new MessageQueue(modulesConfig, localModulesConfig);
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return {
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callFunction: messageQueue.callFunction.bind(messageQueue),
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callFunctionReturnFlushedQueue:
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messageQueue.callFunctionReturnFlushedQueue.bind(messageQueue),
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invokeCallback: messageQueue.invokeCallback.bind(messageQueue),
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invokeCallbackAndReturnFlushedQueue:
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messageQueue.invokeCallbackAndReturnFlushedQueue.bind(messageQueue),
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flushedQueue: messageQueue.flushedQueue.bind(messageQueue),
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RemoteModules: mapObject(modulesConfig, this._createBridgedModule.bind(this, messageQueue)),
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setLoggingEnabled: messageQueue.setLoggingEnabled.bind(messageQueue),
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getLoggedOutgoingItems: messageQueue.getLoggedOutgoingItems.bind(messageQueue),
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getLoggedIncomingItems: messageQueue.getLoggedIncomingItems.bind(messageQueue),
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replayPreviousLog: messageQueue.replayPreviousLog.bind(messageQueue),
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processBatch: messageQueue.processBatch.bind(messageQueue),
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};
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}
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};
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module.exports = BatchedBridgeFactory;
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