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Viewing file:     red.js (6.68 KB)      -rw-r--r--

/*!
 * Copyright JS Foundation and other contributors, http://js.foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 **/

var fs = require("fs");
var path = require('path');

var runtime = require("@node-red/runtime");
var redUtil = require("@node-red/util");

var api = require("@node-red/editor-api");

var server = null;
var apiEnabled = false;

function checkVersion(userSettings) {
    var semver = require('semver');
    if (!semver.satisfies(process.version,">=8.9.0")) {
        // TODO: in the future, make this a hard error.
        // var e = new Error("Unsupported version of Node.js");
        // e.code = "unsupported_version";
        // throw e;
        userSettings.UNSUPPORTED_VERSION = process.version;
    }
}
/**
 * This module provides the full Node-RED application, with both the runtime
 * and editor components built in.
 *
 * The API this module exposes allows it to be embedded within another Node.js
 * application.
 *
 * @namespace node-red
 */
module.exports = {
    /**
     * Initialise the Node-RED application.
     * @param {server} httpServer - the HTTP server object to use
     * @param {Object} userSettings - an object containing the runtime settings
     * @memberof node-red
     */
    init: function(httpServer, userSettings) {
        if (!userSettings) {
            userSettings = httpServer;
            httpServer = null;
        }

        if (!userSettings.SKIP_BUILD_CHECK) {
            checkVersion(userSettings);
        }

        if (!userSettings.hasOwnProperty("coreNodesDir")) {
            userSettings.coreNodesDir = path.dirname(require.resolve("@node-red/nodes"))
        }
        redUtil.init(userSettings);
        if (userSettings.httpAdminRoot !== false) {
            // Initialise the runtime
            runtime.init(userSettings,httpServer,api);
            // Initialise the editor-api
            api.init(userSettings,httpServer,runtime.storage,runtime);
            // Attach the runtime admin app to the api admin app
            api.httpAdmin.use(runtime.httpAdmin);

            apiEnabled = true;
            server = httpServer;
        } else {
            runtime.init(userSettings, httpServer);
            apiEnabled = false;
            if (httpServer) {
                server = httpServer;
            } else {
                server = null;
            }
        }
        return;
    },
    /**
     * Start the Node-RED application.
     * @return {Promise} - resolves when complete
     * @memberof node-red
     */
    start: function() {
        // The top level red.js has always used 'otherwise' on the promise returned
        // here. This is a non-standard promise function coming from our early use
        // of the when.js library.
        // We want to remove all dependency on when.js as native Promises now exist.
        // But we have the issue that some embedders of Node-RED may have copied our
        // top-level red.js a bit too much.
        //
        let startPromise = runtime.start().then(function() {
            if (apiEnabled) {
                return api.start();
            }
        });
        startPromise._then = startPromise.then;
        startPromise.then = function(resolve,reject) {
            var inner = startPromise._then(resolve,reject);
            inner.otherwise = function(cb) {
                redUtil.log.error("**********************************************");
                redUtil.log.error("* Deprecated call to RED.start().otherwise() *");
                redUtil.log.error("* This will be removed in Node-RED 2.x       *");
                redUtil.log.error("* Use RED.start().catch() instead            *")
                redUtil.log.error("**********************************************");
                return inner.catch(cb);
            }
            return inner;
        }
        return startPromise;
    },
    /**
     * Stop the Node-RED application.
     *
     * Once called, Node-RED should not be restarted until the Node.JS process is
     * restarted.
     *
     * @return {Promise} - resolves when complete
     * @memberof node-red
     */
    stop: function() {
        return runtime.stop().then(function() {
            if (apiEnabled) {
                return api.stop();
            }
        })
    },

    /**
     * Logging utilities
     * @see @node-red/util_log
     * @memberof node-red
     */
    log: redUtil.log,

    /**
     * General utilities
     * @see @node-red/util_util
     * @memberof node-red
     */
    util: redUtil.util,


    /**
     * This provides access to the internal nodes module of the
     * runtime. The details of this API remain undocumented as they should not
     * be used directly.
     *
     * Most administrative actions should be performed use the runtime api
     * under [node-red.runtime]{@link node-red.runtime}.
     *
     * @memberof node-red
     */
    get nodes() { return runtime._.nodes },

    /**
     * Runtime events emitter
     * @see @node-red/util_events
     * @memberof node-red
     */
    events: redUtil.events,

    /**
     * Runtime hooks engine
     * @see @node-red/runtime_hooks
     * @memberof node-red
     */
    hooks: runtime.hooks,


    /**
     * This provides access to the internal settings module of the
     * runtime.
     *
     * @memberof node-red
     */
    get settings() { return runtime._.settings },


    /**
     * Get the version of the runtime
     * @return {String} - the runtime version
     * @function
     * @memberof node-red
     */
    get version() { return runtime._.version },


    /**
     * The express application for the Editor Admin API
     * @type ExpressApplication
     * @memberof node-red
     */
    get httpAdmin() { return api.httpAdmin },

    /**
     * The express application for HTTP Nodes
     * @type ExpressApplication
     * @memberof node-red
     */
    get httpNode() { return runtime.httpNode },

    /**
     * The HTTP Server used by the runtime
     * @type HTTPServer
     * @memberof node-red
     */
    get server() { return server },

    /**
     * The runtime api
     * @see @node-red/runtime
     * @memberof node-red
     */
    runtime: runtime,

    /**
     * The editor authentication api.
     * @see @node-red/editor-api_auth
     * @memberof node-red
     */
    auth: api.auth
};