mirror of
https://github.com/node-red/node-red.git
synced 2023-10-10 13:36:53 +02:00
431 lines
13 KiB
JavaScript
431 lines
13 KiB
JavaScript
/**
|
|
* Copyright 2013 IBM Corp.
|
|
*
|
|
* 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 util = require("util");
|
|
var EventEmitter = require("events").EventEmitter;
|
|
var fs = require("fs");
|
|
var path = require("path");
|
|
var clone = require("clone");
|
|
var events = require("./events");
|
|
var storage = null;
|
|
var settings = null;
|
|
|
|
function getCallerFilename(type) {
|
|
//if (type == "summary") {
|
|
// var err = new Error();
|
|
// console.log(err.stack);
|
|
// return null;
|
|
//}
|
|
// Save original Error.prepareStackTrace
|
|
var origPrepareStackTrace = Error.prepareStackTrace;
|
|
// Override with function that just returns `stack`
|
|
Error.prepareStackTrace = function (_, stack) {
|
|
return stack;
|
|
}
|
|
// Create a new `Error`, which automatically gets `stack`
|
|
var err = new Error();
|
|
// Evaluate `err.stack`, which calls our new `Error.prepareStackTrace`
|
|
var stack = err.stack;
|
|
// Restore original `Error.prepareStackTrace`
|
|
Error.prepareStackTrace = origPrepareStackTrace;
|
|
// Remove superfluous function call on stack
|
|
stack.shift();
|
|
stack.shift();
|
|
return stack[0].getFileName();
|
|
}
|
|
|
|
var registry = (function() {
|
|
var nodes = {};
|
|
var logHandlers = [];
|
|
var obj = {
|
|
add: function(n) {
|
|
nodes[n.id] = n;
|
|
n.on("log",function(msg) {
|
|
for (var i in logHandlers) {
|
|
logHandlers[i].emit("log",msg);
|
|
}
|
|
});
|
|
},
|
|
get: function(i) {
|
|
return nodes[i];
|
|
},
|
|
clear: function() {
|
|
events.emit("nodes-stopping");
|
|
for (var n in nodes) {
|
|
nodes[n].close();
|
|
}
|
|
events.emit("nodes-stopped");
|
|
nodes = {};
|
|
},
|
|
each: function(cb) {
|
|
for (var n in nodes) {
|
|
cb(nodes[n]);
|
|
}
|
|
},
|
|
addLogHandler: function(handler) {
|
|
logHandlers.push(handler);
|
|
}
|
|
}
|
|
return obj;
|
|
})();
|
|
|
|
var ConsoleLogHandler = new EventEmitter();
|
|
ConsoleLogHandler.on("log",function(msg) {
|
|
util.log("["+msg.level+"] ["+msg.type+":"+(msg.name||msg.id)+"] "+msg.msg);
|
|
});
|
|
|
|
registry.addLogHandler(ConsoleLogHandler);
|
|
|
|
var node_type_registry = (function() {
|
|
var node_types = {};
|
|
var node_configs = {};
|
|
var obj = {
|
|
register: function(type,node) {
|
|
util.inherits(node, Node);
|
|
var callerFilename = getCallerFilename(type);
|
|
if (callerFilename == null) {
|
|
util.log("["+type+"] unable to determine filename");
|
|
} else {
|
|
var configFilename = callerFilename.replace(/\.js$/,".html");
|
|
if (fs.existsSync(configFilename)) {
|
|
node_types[type] = node;
|
|
if (! node_configs[configFilename]) {
|
|
node_configs[configFilename] = fs.readFileSync(configFilename,'utf8');
|
|
}
|
|
events.emit("type-registered",type);
|
|
} else {
|
|
util.log("["+type+"] missing template file: "+configFilename);
|
|
}
|
|
}
|
|
},
|
|
get: function(type) {
|
|
return node_types[type];
|
|
},
|
|
getNodeConfigs: function() {
|
|
var result = "";
|
|
for (var nt in node_configs) {
|
|
result += node_configs[nt];
|
|
}
|
|
return result;
|
|
}
|
|
}
|
|
return obj;
|
|
})();
|
|
|
|
function Node(n) {
|
|
this.id = n.id;
|
|
registry.add(this);
|
|
this.type = n.type;
|
|
if (n.name) {
|
|
this.name = n.name;
|
|
}
|
|
this.wires = n.wires||[];
|
|
}
|
|
util.inherits(Node,EventEmitter);
|
|
|
|
Node.prototype.close = function() {
|
|
// called when a node is removed
|
|
this.emit("close");
|
|
}
|
|
|
|
|
|
Node.prototype.send = function(msg) {
|
|
// instanceof doesn't work for some reason here
|
|
if (msg == null) {
|
|
msg = [];
|
|
} else if (!util.isArray(msg)) {
|
|
msg = [msg];
|
|
}
|
|
for (var i in this.wires) {
|
|
var wires = this.wires[i];
|
|
if (i < msg.length) {
|
|
if (msg[i] != null) {
|
|
var msgs = msg[i];
|
|
if (!util.isArray(msg[i])) {
|
|
msgs = [msg[i]];
|
|
}
|
|
//if (wires.length == 1) {
|
|
// // Single recipient, don't need to clone the message
|
|
// var node = registry.get(wires[0]);
|
|
// if (node) {
|
|
// for (var k in msgs) {
|
|
// var mm = msgs[k];
|
|
// node.receive(mm);
|
|
// }
|
|
// }
|
|
//} else {
|
|
// Multiple recipients, must send message copies
|
|
for (var j in wires) {
|
|
var node = registry.get(wires[j]);
|
|
if (node) {
|
|
for (var k in msgs) {
|
|
var mm = msgs[k];
|
|
// Temporary fix for #97
|
|
// TODO: remove this http-node-specific fix somehow
|
|
var req = mm.req;
|
|
var res = mm.res;
|
|
delete mm.req;
|
|
delete mm.res;
|
|
var m = clone(mm);
|
|
m.req = req;
|
|
m.res = res;
|
|
mm.req = req;
|
|
mm.res = res;
|
|
node.receive(m);
|
|
}
|
|
}
|
|
}
|
|
//}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
Node.prototype.receive = function(msg) {
|
|
this.emit("input",msg);
|
|
}
|
|
|
|
Node.prototype.log = function(msg) {
|
|
var o = {level:'log',id:this.id, type:this.type, msg:msg};
|
|
if (this.name) o.name = this.name;
|
|
this.emit("log",o);
|
|
}
|
|
Node.prototype.warn = function(msg) {
|
|
var o = {level:'warn',id:this.id, type:this.type, msg:msg};
|
|
if (this.name) o.name = this.name;
|
|
this.emit("log",o);
|
|
}
|
|
Node.prototype.error = function(msg) {
|
|
var o = {level:'error',id:this.id, type:this.type, msg:msg};
|
|
if (this.name) o.name = this.name;
|
|
this.emit("log",o);
|
|
}
|
|
|
|
var credentials = {};
|
|
|
|
function addCredentials(id,creds) {
|
|
credentials[id] = creds;
|
|
if (!storage) {
|
|
// Do this lazily to ensure the storage provider as been initialised
|
|
storage = require("./storage");
|
|
}
|
|
storage.saveCredentials(credentials);
|
|
}
|
|
function getCredentials(id) {
|
|
return credentials[id];
|
|
}
|
|
function deleteCredentials(id) {
|
|
delete credentials[id];
|
|
storage.saveCredentials(credentials);
|
|
}
|
|
function createNode(node,def) {
|
|
Node.call(node,def);
|
|
}
|
|
|
|
function load(_settings) {
|
|
settings = _settings;
|
|
|
|
function scanForNodes(dir) {
|
|
var pm = path.join(dir,"node_modules");
|
|
if (fs.existsSync(pm)) {
|
|
fs.readdirSync(pm).filter(function(fn) {
|
|
var pkgfn = path.join(pm,fn,"package.json");
|
|
if (fs.existsSync(pkgfn)) {
|
|
var pkg = require(pkgfn);
|
|
if (pkg['node-red']) {
|
|
console.log(pkg.name,pkg.version);
|
|
var nr = pkg['node-red'];
|
|
if (nr.nodes) {
|
|
var nrn = nr.nodes;
|
|
for (var i in nrn) {
|
|
console.log(" ",i,":",nrn[i]);
|
|
try {
|
|
require(path.join(pm,fn,nrn[i]));
|
|
} catch(err) {
|
|
util.log("["+i+"] "+err);
|
|
//console.log(err.stack);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
var up = path.join(dir,"..");
|
|
if (up !== dir) {
|
|
scanForNodes(up);
|
|
}
|
|
}
|
|
|
|
function loadNodes(dir) {
|
|
var errors = [];
|
|
if (fs.existsSync(dir)) {
|
|
fs.readdirSync(dir).sort().filter(function(fn){
|
|
var stats = fs.statSync(path.join(dir,fn));
|
|
if (stats.isFile()) {
|
|
if (/\.js$/.test(fn)) {
|
|
try {
|
|
require(path.join(dir,fn));
|
|
} catch(err) {
|
|
errors.push({fn:fn, err:err});
|
|
//util.log("["+fn+"] "+err);
|
|
//console.log(err.stack);
|
|
}
|
|
}
|
|
} else if (stats.isDirectory()) {
|
|
// Ignore /.dirs/, /lib/ /node_modules/
|
|
if (!/^(\..*|lib|icons|node_modules)$/.test(fn)) {
|
|
errors = errors.concat(loadNodes(path.join(dir,fn)));
|
|
} else if (fn === "icons") {
|
|
events.emit("node-icon-dir",path.join(dir,fn));
|
|
}
|
|
}
|
|
});
|
|
}
|
|
return errors;
|
|
}
|
|
var errors = loadNodes(__dirname+"/../nodes");
|
|
scanForNodes(__dirname+"/../nodes");
|
|
if (settings.nodesDir) {
|
|
errors = errors.concat(loadNodes(settings.nodesDir));
|
|
scanForNodes(settings.nodesDir);
|
|
}
|
|
//console.log(errors);
|
|
return errors;
|
|
//events.emit("nodes-loaded");
|
|
}
|
|
|
|
var activeConfig = [];
|
|
var missingTypes = [];
|
|
|
|
events.on('type-registered',function(type) {
|
|
if (missingTypes.length > 0) {
|
|
var i = missingTypes.indexOf(type);
|
|
if (i != -1) {
|
|
missingTypes.splice(i,1);
|
|
util.log("[red] Missing type registered: "+type);
|
|
}
|
|
if (missingTypes.length == 0) {
|
|
parseConfig();
|
|
}
|
|
}
|
|
});
|
|
|
|
function getNode(nid) {
|
|
return registry.get(nid);
|
|
}
|
|
|
|
function stopFlows() {
|
|
if (activeConfig&&activeConfig.length > 0) {
|
|
util.log("[red] Stopping flows");
|
|
}
|
|
registry.clear();
|
|
}
|
|
|
|
function setConfig(conf) {
|
|
stopFlows();
|
|
activeConfig = conf;
|
|
|
|
if (!storage) {
|
|
// Do this lazily to ensure the storage provider as been initialised
|
|
storage = require("./storage");
|
|
}
|
|
storage.getCredentials().then(function(creds) {
|
|
credentials = creds;
|
|
parseConfig();
|
|
}).otherwise(function(err) {
|
|
util.log("[red] Error loading credentials : "+err);
|
|
});
|
|
}
|
|
|
|
function getConfig() {
|
|
return activeConfig;
|
|
}
|
|
|
|
var parseConfig = function() {
|
|
missingTypes = [];
|
|
for (var i in activeConfig) {
|
|
var type = activeConfig[i].type;
|
|
// TODO: remove workspace in next release+1
|
|
if (type != "workspace" && type != "tab") {
|
|
var nt = node_type_registry.get(type);
|
|
if (!nt && missingTypes.indexOf(type) == -1) {
|
|
missingTypes.push(type);
|
|
}
|
|
}
|
|
};
|
|
if (missingTypes.length > 0) {
|
|
util.log("[red] Waiting for missing types to be registered:");
|
|
for (var i in missingTypes) {
|
|
util.log("[red] - "+missingTypes[i]);
|
|
}
|
|
return;
|
|
}
|
|
|
|
util.log("[red] Starting flows");
|
|
events.emit("nodes-starting");
|
|
for (var i in activeConfig) {
|
|
var nn = null;
|
|
// TODO: remove workspace in next release+1
|
|
if (activeConfig[i].type != "workspace" && activeConfig[i].type != "tab") {
|
|
var nt = node_type_registry.get(activeConfig[i].type);
|
|
if (nt) {
|
|
try {
|
|
nn = new nt(activeConfig[i]);
|
|
}
|
|
catch (err) {
|
|
util.log("[red] "+activeConfig[i].type+" : "+err);
|
|
}
|
|
}
|
|
// console.log(nn);
|
|
if (nn == null) {
|
|
util.log("[red] unknown type: "+activeConfig[i].type);
|
|
}
|
|
}
|
|
}
|
|
// Clean up any orphaned credentials
|
|
var deletedCredentials = false;
|
|
for (var c in credentials) {
|
|
var n = registry.get(c);
|
|
if (!n) {
|
|
deletedCredentials = true;
|
|
delete credentials[c];
|
|
}
|
|
}
|
|
if (deletedCredentials) {
|
|
storage.saveCredentials(credentials);
|
|
}
|
|
events.emit("nodes-started");
|
|
}
|
|
|
|
|
|
module.exports = {
|
|
Node:Node,
|
|
addCredentials: addCredentials,
|
|
getCredentials: getCredentials,
|
|
deleteCredentials: deleteCredentials,
|
|
createNode: createNode,
|
|
registerType: node_type_registry.register,
|
|
getNodeConfigs: node_type_registry.getNodeConfigs,
|
|
addLogHandler: registry.addLogHandler,
|
|
load: load,
|
|
getNode: getNode,
|
|
stopFlows: stopFlows,
|
|
setConfig: setConfig,
|
|
getConfig: getConfig
|
|
}
|
|
|