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node-red/packages/node_modules/@node-red/runtime/lib/flows/index.js

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/**
* 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 clone = require("clone");
var Flow = require('./Flow');
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var typeRegistry = require("@node-red/registry");
var deprecated = typeRegistry.deprecated;
var context = require("../nodes/context")
var credentials = require("../nodes/credentials");
var flowUtil = require("./util");
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var log;
const events = require("@node-red/util").events;
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var redUtil = require("@node-red/util").util;
var storage = null;
var settings = null;
var activeConfig = null;
var activeFlowConfig = null;
var activeFlows = {};
var started = false;
var credentialsPendingReset = false;
var activeNodesToFlow = {};
var typeEventRegistered = false;
function init(runtime) {
if (started) {
throw new Error("Cannot init without a stop");
}
settings = runtime.settings;
storage = runtime.storage;
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log = runtime.log;
started = false;
if (!typeEventRegistered) {
events.on('type-registered',function(type) {
if (activeFlowConfig && activeFlowConfig.missingTypes.length > 0) {
var i = activeFlowConfig.missingTypes.indexOf(type);
if (i != -1) {
log.info(log._("nodes.flows.registered-missing", {type:type}));
activeFlowConfig.missingTypes.splice(i,1);
if (activeFlowConfig.missingTypes.length === 0 && started) {
events.emit("runtime-event",{id:"runtime-state",retain: true});
start();
}
}
}
});
typeEventRegistered = true;
}
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Flow.init(runtime);
flowUtil.init(runtime);
}
function loadFlows() {
var config;
return storage.getFlows().then(function(_config) {
config = _config;
log.debug("loaded flow revision: "+config.rev);
return credentials.load(config.credentials).then(function() {
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events.emit("runtime-event",{id:"runtime-state",retain:true});
return config;
});
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}).catch(function(err) {
if (err.code === "credentials_load_failed" && !storage.projects) {
// project disabled, credential load failed
credentialsPendingReset = true;
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log.warn(log._("nodes.flows.error",{message:err.toString()}));
events.emit("runtime-event",{id:"runtime-state",payload:{type:"warning",error:err.code,text:"notification.warnings.credentials_load_failed_reset"},retain:true});
return config;
} else {
activeConfig = null;
events.emit("runtime-event",{id:"runtime-state",payload:{type:"warning",error:err.code,project:err.project,text:"notification.warnings."+err.code},retain:true});
if (err.code === "project_not_found") {
log.warn(log._("storage.localfilesystem.projects.project-not-found",{project:err.project}));
} else {
log.warn(log._("nodes.flows.error",{message:err.toString()}));
}
throw err;
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}
});
}
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function load(forceStart) {
if (forceStart && settings.safeMode) {
// This is a force reload from the API - disable safeMode
delete settings.safeMode;
}
return setFlows(null,null,"load",false,forceStart);
}
/*
* _config - new node array configuration
* _credentials - new credentials configuration (optional)
* type - full/nodes/flows/load (default full)
* muteLog - don't emit the standard log messages (used for individual flow api)
*/
function setFlows(_config,_credentials,type,muteLog,forceStart,user) {
if (typeof _credentials === "string") {
type = _credentials;
_credentials = null;
}
type = type||"full";
if (settings.safeMode) {
if (type !== "load") {
// If in safeMode, the flows are stopped. We cannot do a modified nodes/flows
// type deploy as nothing is running. Can only do a "load" or "full" deploy.
// The "load" case is already handled in `load()` to distinguish between
// startup-load and api-request-load.
type = "full";
delete settings.safeMode;
}
}
var configSavePromise = null;
var config = null;
var diff;
var newFlowConfig;
var isLoad = false;
if (type === "load") {
isLoad = true;
configSavePromise = loadFlows().then(function(_config) {
config = clone(_config.flows);
newFlowConfig = flowUtil.parseConfig(clone(config));
type = "full";
return _config.rev;
});
} else {
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// Clone the provided config so it can be manipulated
config = clone(_config);
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// Parse the configuration
newFlowConfig = flowUtil.parseConfig(clone(config));
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// Generate a diff to identify what has changed
diff = flowUtil.diffConfigs(activeFlowConfig,newFlowConfig);
// Now the flows have been compared, remove any credentials from newFlowConfig
// so they don't cause false-positive diffs the next time a flow is deployed
for (var id in newFlowConfig.allNodes) {
if (newFlowConfig.allNodes.hasOwnProperty(id)) {
delete newFlowConfig.allNodes[id].credentials;
}
}
var credsDirty;
if (_credentials) {
// A full set of credentials have been provided. Use those instead
configSavePromise = credentials.load(_credentials);
credsDirty = true;
} else {
// Allow the credential store to remove anything no longer needed
credentials.clean(config);
// Remember whether credentials need saving or not
var credsDirty = credentials.dirty();
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configSavePromise = Promise.resolve();
}
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// Get the latest credentials and ask storage to save them (if needed)
// as well as the new flow configuration.
configSavePromise = configSavePromise.then(function() {
return credentials.export()
}).then(function(creds) {
var saveConfig = {
flows: config,
credentialsDirty:credsDirty,
credentials: creds
}
return storage.saveFlows(saveConfig, user);
});
}
return configSavePromise.then(flowRevision => {
if (!isLoad) {
log.debug("saved flow revision: "+flowRevision);
}
activeConfig = {
flows:config,
rev:flowRevision
};
activeFlowConfig = newFlowConfig;
if (forceStart || started) {
// Flows are running (or should be)
// Stop the active flows (according to deploy type and the diff)
return stop(type,diff,muteLog).then(() => {
// Once stopped, allow context to remove anything no longer needed
return context.clean(activeFlowConfig)
}).then(() => {
// Start the active flows
start(type,diff,muteLog).then(() => {
events.emit("runtime-event",{id:"runtime-deploy",payload:{revision:flowRevision},retain: true});
});
// Return the new revision asynchronously to the actual start
return flowRevision;
}).catch(function(err) { })
} else {
events.emit("runtime-event",{id:"runtime-deploy",payload:{revision:flowRevision},retain: true});
}
});
}
function getNode(id) {
var node;
if (activeNodesToFlow[id] && activeFlows[activeNodesToFlow[id]]) {
return activeFlows[activeNodesToFlow[id]].getNode(id,true);
}
for (var flowId in activeFlows) {
if (activeFlows.hasOwnProperty(flowId)) {
node = activeFlows[flowId].getNode(id,true);
if (node) {
return node;
}
}
}
return null;
}
function eachNode(cb) {
for (var id in activeFlowConfig.allNodes) {
if (activeFlowConfig.allNodes.hasOwnProperty(id)) {
cb(activeFlowConfig.allNodes[id]);
}
}
}
function getFlows() {
return activeConfig;
}
async function start(type,diff,muteLog) {
type = type||"full";
started = true;
var i;
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// If there are missing types, report them, emit the necessary runtime event and return
if (activeFlowConfig.missingTypes.length > 0) {
log.info(log._("nodes.flows.missing-types"));
var knownUnknowns = 0;
for (i=0;i<activeFlowConfig.missingTypes.length;i++) {
var nodeType = activeFlowConfig.missingTypes[i];
var info = deprecated.get(nodeType);
if (info) {
log.info(log._("nodes.flows.missing-type-provided",{type:activeFlowConfig.missingTypes[i],module:info.module}));
knownUnknowns += 1;
} else {
log.info(" - "+activeFlowConfig.missingTypes[i]);
}
}
if (knownUnknowns > 0) {
log.info(log._("nodes.flows.missing-type-install-1"));
log.info(" npm install <module name>");
log.info(log._("nodes.flows.missing-type-install-2"));
log.info(" "+settings.userDir);
}
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events.emit("runtime-event",{id:"runtime-state",payload:{error:"missing-types", type:"warning",text:"notification.warnings.missing-types",types:activeFlowConfig.missingTypes},retain:true});
return;
}
try {
await typeRegistry.checkFlowDependencies(activeConfig.flows);
} catch(err) {
log.info("Failed to load external modules required by this flow:");
const missingModules = [];
for (i=0;i<err.length;i++) {
let errMessage = err[i].error.toString()
missingModules.push({module:err[i].module.module, error: err[i].error.code || err[i].error.toString()})
log.info(` - ${err[i].module.spec} [${err[i].error.code || "unknown_error"}]`);
}
events.emit("runtime-event",{id:"runtime-state",payload:{error:"missing-modules", type:"warning",text:"notification.warnings.missing-modules",modules:missingModules},retain:true});
return;
}
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// In safe mode, don't actually start anything, emit the necessary runtime event and return
if (settings.safeMode) {
log.info("*****************************************************************")
log.info(log._("nodes.flows.safe-mode"));
log.info("*****************************************************************")
events.emit("runtime-event",{id:"runtime-state",payload:{error:"safe-mode", type:"warning",text:"notification.warnings.safe-mode"},retain:true});
return;
}
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if (!muteLog) {
if (type !== "full") {
log.info(log._("nodes.flows.starting-modified-"+type));
} else {
log.info(log._("nodes.flows.starting-flows"));
}
}
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events.emit("flows:starting", {config: activeConfig, type: type, diff: diff})
var id;
if (type === "full") {
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// A full start means everything should
// Check the 'global' flow is running
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if (!activeFlows['global']) {
log.debug("red/nodes/flows.start : starting flow : global");
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activeFlows['global'] = Flow.create(flowAPI,activeFlowConfig);
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}
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// Check each flow in the active configuration
for (id in activeFlowConfig.flows) {
if (activeFlowConfig.flows.hasOwnProperty(id)) {
if (!activeFlowConfig.flows[id].disabled && !activeFlows[id]) {
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// This flow is not disabled, nor is it currently active, so create it
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activeFlows[id] = Flow.create(flowAPI,activeFlowConfig,activeFlowConfig.flows[id]);
log.debug("red/nodes/flows.start : starting flow : "+id);
} else {
log.debug("red/nodes/flows.start : not starting disabled flow : "+id);
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}
}
}
} else {
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// A modified-type deploy means restarting things that have changed
// Update the global flow
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activeFlows['global'].update(activeFlowConfig,activeFlowConfig);
for (id in activeFlowConfig.flows) {
if (activeFlowConfig.flows.hasOwnProperty(id)) {
if (!activeFlowConfig.flows[id].disabled) {
if (activeFlows[id]) {
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// This flow exists and is not disabled, so update it
activeFlows[id].update(activeFlowConfig,activeFlowConfig.flows[id]);
} else {
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// This flow didn't previously exist, so create it
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activeFlows[id] = Flow.create(flowAPI,activeFlowConfig,activeFlowConfig.flows[id]);
log.debug("red/nodes/flows.start : starting flow : "+id);
}
} else {
log.debug("red/nodes/flows.start : not starting disabled flow : "+id);
}
}
}
}
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// Having created or updated all flows, now start them.
for (id in activeFlows) {
if (activeFlows.hasOwnProperty(id)) {
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try {
activeFlows[id].start(diff);
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// Create a map of node id to flow id and also a subflowInstance lookup map
var activeNodes = activeFlows[id].getActiveNodes();
Object.keys(activeNodes).forEach(function(nid) {
activeNodesToFlow[nid] = id;
});
} catch(err) {
console.log(err.stack);
}
}
}
events.emit("flows:started", {config: activeConfig, type: type, diff: diff});
// Deprecated event
events.emit("nodes-started");
if (credentialsPendingReset === true) {
credentialsPendingReset = false;
} else {
events.emit("runtime-event",{id:"runtime-state",retain:true});
}
if (!muteLog) {
if (type !== "full") {
log.info(log._("nodes.flows.started-modified-"+type));
} else {
log.info(log._("nodes.flows.started-flows"));
}
}
return;
}
function stop(type,diff,muteLog) {
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if (!started) {
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return Promise.resolve();
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}
type = type||"full";
diff = diff||{
added:[],
changed:[],
removed:[],
rewired:[],
linked:[]
};
if (!muteLog) {
if (type !== "full") {
log.info(log._("nodes.flows.stopping-modified-"+type));
} else {
log.info(log._("nodes.flows.stopping-flows"));
}
}
started = false;
var promises = [];
var stopList;
var removedList = diff.removed;
if (type === 'nodes') {
stopList = diff.changed.concat(diff.removed);
} else if (type === 'flows') {
stopList = diff.changed.concat(diff.removed).concat(diff.linked);
}
events.emit("flows:stopping",{config: activeConfig, type: type, diff: diff})
for (var id in activeFlows) {
if (activeFlows.hasOwnProperty(id)) {
var flowStateChanged = diff && (diff.added.indexOf(id) !== -1 || diff.removed.indexOf(id) !== -1);
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log.debug("red/nodes/flows.stop : stopping flow : "+id);
promises.push(activeFlows[id].stop(flowStateChanged?null:stopList,removedList));
if (type === "full" || flowStateChanged || diff.removed.indexOf(id)!==-1) {
delete activeFlows[id];
}
}
}
return Promise.all(promises).then(function() {
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for (id in activeNodesToFlow) {
if (activeNodesToFlow.hasOwnProperty(id)) {
if (!activeFlows[activeNodesToFlow[id]]) {
delete activeNodesToFlow[id];
}
}
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}
if (stopList) {
stopList.forEach(function(id) {
delete activeNodesToFlow[id];
});
}
if (!muteLog) {
if (type !== "full") {
log.info(log._("nodes.flows.stopped-modified-"+type));
} else {
log.info(log._("nodes.flows.stopped-flows"));
}
}
events.emit("flows:stopped",{config: activeConfig, type: type, diff: diff});
// Deprecated event
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events.emit("nodes-stopped");
});
}
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function checkTypeInUse(id) {
var nodeInfo = typeRegistry.getNodeInfo(id);
if (!nodeInfo) {
throw new Error(log._("nodes.index.unrecognised-id", {id:id}));
} else {
var inUse = {};
var config = getFlows();
config.flows.forEach(function(n) {
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inUse[n.type] = (inUse[n.type]||0)+1;
});
var nodesInUse = [];
nodeInfo.types.forEach(function(t) {
if (inUse[t]) {
nodesInUse.push(t);
}
});
if (nodesInUse.length > 0) {
var msg = nodesInUse.join(", ");
var err = new Error(log._("nodes.index.type-in-use", {msg:msg}));
err.code = "type_in_use";
throw err;
}
}
}
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function updateMissingTypes() {
var subflowInstanceRE = /^subflow:(.+)$/;
activeFlowConfig.missingTypes = [];
for (var id in activeFlowConfig.allNodes) {
if (activeFlowConfig.allNodes.hasOwnProperty(id)) {
var node = activeFlowConfig.allNodes[id];
if (node.type !== 'tab' && node.type !== 'subflow') {
var subflowDetails = subflowInstanceRE.exec(node.type);
if ( (subflowDetails && !activeFlowConfig.subflows[subflowDetails[1]]) || (!subflowDetails && !typeRegistry.get(node.type)) ) {
if (activeFlowConfig.missingTypes.indexOf(node.type) === -1) {
activeFlowConfig.missingTypes.push(node.type);
}
}
}
}
}
}
async function addFlow(flow, user) {
var i,node;
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if (!flow.hasOwnProperty('nodes')) {
throw new Error('missing nodes property');
}
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flow.id = redUtil.generateId();
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var tabNode = {
type:'tab',
label:flow.label,
id:flow.id
}
if (flow.hasOwnProperty('info')) {
tabNode.info = flow.info;
}
if (flow.hasOwnProperty('disabled')) {
tabNode.disabled = flow.disabled;
}
var nodes = [tabNode];
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for (i=0;i<flow.nodes.length;i++) {
node = flow.nodes[i];
if (activeFlowConfig.allNodes[node.id]) {
// TODO nls
throw new Error('duplicate id');
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}
if (node.type === 'tab' || node.type === 'subflow') {
throw new Error('invalid node type: '+node.type);
}
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node.z = flow.id;
nodes.push(node);
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}
if (flow.configs) {
for (i=0;i<flow.configs.length;i++) {
node = flow.configs[i];
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if (activeFlowConfig.allNodes[node.id]) {
// TODO nls
throw new Error('duplicate id');
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}
if (node.type === 'tab' || node.type === 'subflow') {
throw new Error('invalid node type: '+node.type);
}
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node.z = flow.id;
nodes.push(node);
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}
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}
var newConfig = clone(activeConfig.flows);
newConfig = newConfig.concat(nodes);
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return setFlows(newConfig, null, 'flows', true, null, user).then(function() {
log.info(log._("nodes.flows.added-flow",{label:(flow.label?flow.label+" ":"")+"["+flow.id+"]"}));
return flow.id;
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});
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}
function getFlow(id) {
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var flow;
if (id === 'global') {
flow = activeFlowConfig;
} else {
flow = activeFlowConfig.flows[id];
}
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if (!flow) {
return null;
}
var result = {
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id: id
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};
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if (flow.label) {
result.label = flow.label;
}
if (flow.hasOwnProperty('disabled')) {
result.disabled = flow.disabled;
}
if (flow.hasOwnProperty('info')) {
result.info = flow.info;
}
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if (id !== 'global') {
result.nodes = [];
}
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if (flow.nodes) {
var nodeIds = Object.keys(flow.nodes);
if (nodeIds.length > 0) {
result.nodes = nodeIds.map(function(nodeId) {
var node = clone(flow.nodes[nodeId]);
if (node.type === 'link out') {
delete node.wires;
}
return node;
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})
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}
}
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if (flow.configs) {
var configIds = Object.keys(flow.configs);
result.configs = configIds.map(function(configId) {
return clone(flow.configs[configId]);
})
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if (result.configs.length === 0) {
delete result.configs;
}
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}
if (flow.subflows) {
var subflowIds = Object.keys(flow.subflows);
result.subflows = subflowIds.map(function(subflowId) {
var subflow = clone(flow.subflows[subflowId]);
var nodeIds = Object.keys(subflow.nodes);
subflow.nodes = nodeIds.map(function(id) {
return subflow.nodes[id];
});
if (subflow.configs) {
var configIds = Object.keys(subflow.configs);
subflow.configs = configIds.map(function(id) {
return subflow.configs[id];
})
}
delete subflow.instances;
return subflow;
});
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if (result.subflows.length === 0) {
delete result.subflows;
}
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}
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return result;
}
async function updateFlow(id,newFlow, user) {
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var label = id;
if (id !== 'global') {
if (!activeFlowConfig.flows[id]) {
var e = new Error();
e.code = 404;
throw e;
}
label = activeFlowConfig.flows[id].label;
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}
var newConfig = clone(activeConfig.flows);
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var nodes;
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if (id === 'global') {
// Remove all nodes whose z is not a known flow
// When subflows can be owned by a flow, this logic will have to take
// that into account
newConfig = newConfig.filter(function(node) {
return node.type === 'tab' || (node.hasOwnProperty('z') && activeFlowConfig.flows.hasOwnProperty(node.z));
})
// Add in the new config nodes
nodes = newFlow.configs||[];
if (newFlow.subflows) {
// Add in the new subflows
newFlow.subflows.forEach(function(sf) {
nodes = nodes.concat(sf.nodes||[]).concat(sf.configs||[]);
delete sf.nodes;
delete sf.configs;
nodes.push(sf);
});
}
} else {
newConfig = newConfig.filter(function(node) {
return node.z !== id && node.id !== id;
});
var tabNode = {
type:'tab',
label:newFlow.label,
id:id
}
if (newFlow.hasOwnProperty('info')) {
tabNode.info = newFlow.info;
}
if (newFlow.hasOwnProperty('disabled')) {
tabNode.disabled = newFlow.disabled;
}
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nodes = [tabNode].concat(newFlow.nodes||[]).concat(newFlow.configs||[]);
nodes.forEach(function(n) {
n.z = id;
});
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}
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newConfig = newConfig.concat(nodes);
return setFlows(newConfig, null, 'flows', true, null, user).then(function() {
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log.info(log._("nodes.flows.updated-flow",{label:(label?label+" ":"")+"["+id+"]"}));
})
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}
async function removeFlow(id, user) {
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if (id === 'global') {
// TODO: nls + error code
throw new Error('not allowed to remove global');
}
var flow = activeFlowConfig.flows[id];
if (!flow) {
var e = new Error();
e.code = 404;
throw e;
}
var newConfig = clone(activeConfig.flows);
newConfig = newConfig.filter(function(node) {
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return node.z !== id && node.id !== id;
});
return setFlows(newConfig, null, 'flows', true, null, user).then(function() {
log.info(log._("nodes.flows.removed-flow",{label:(flow.label?flow.label+" ":"")+"["+flow.id+"]"}));
});
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}
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const flowAPI = {
getNode: getNode,
handleError: () => false,
handleStatus: () => false,
getSetting: k => flowUtil.getEnvVar(k),
log: m => log.log(m)
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}
module.exports = {
init: init,
/**
* Load the current flow configuration from storage
* @return a promise for the loading of the config
*/
load: load,
loadFlows: load,
get:getNode,
eachNode: eachNode,
/**
* Gets the current flow configuration
*/
getFlows: getFlows,
/**
* Sets the current active config.
* @param config the configuration to enable
* @param type the type of deployment to do: full (default), nodes, flows, load
* @return a promise for the saving/starting of the new flow
*/
setFlows: setFlows,
/**
* Starts the current flow configuration
*/
startFlows: start,
/**
* Stops the current flow configuration
* @return a promise for the stopping of the flow
*/
stopFlows: stop,
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get started() { return started },
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// handleError: handleError,
// handleStatus: handleStatus,
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checkTypeInUse: checkTypeInUse,
addFlow: addFlow,
getFlow: getFlow,
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updateFlow: updateFlow,
removeFlow: removeFlow,
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disableFlow:null,
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enableFlow:null,
isDeliveryModeAsync: function() {
// If settings is null, this is likely being run by unit tests
return !settings || !settings.runtimeSyncDelivery
}
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};