mirror of https://github.com/node-red/node-red.git
313 lines
12 KiB
JavaScript
313 lines
12 KiB
JavaScript
/**
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* Copyright JS Foundation and other contributors, http://js.foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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const clone = require("clone");
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const Flow = require('./Flow').Flow;
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const redUtil = require("@node-red/util").util;
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const flowUtil = require("./util");
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var Log;
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/**
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* This class represents a subflow - which is handled as a special type of Flow
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*/
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class Subflow extends Flow {
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/**
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* Create a Subflow object.
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* This takes a subflow definition and instance node, creates a clone of the
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* definition with unique ids applied and passes to the super class.
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* @param {[type]} parent [description]
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* @param {[type]} globalFlow [description]
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* @param {[type]} subflowDef [description]
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* @param {[type]} subflowInstance [description]
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*/
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constructor(parent,globalFlow,subflowDef,subflowInstance) {
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// console.log(subflowDef);
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// console.log("CREATE SUBFLOW",subflowDef.id,subflowInstance.id);
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// console.log("SubflowInstance\n"+JSON.stringify(subflowInstance," ",2));
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// console.log("SubflowDef\n"+JSON.stringify(subflowDef," ",2));
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var subflows = parent.flow.subflows;
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var globalSubflows = parent.global.subflows;
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var node_map = {};
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var node;
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var wires;
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var i;
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var subflowInternalFlowConfig = {
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id: subflowInstance.id,
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configs: {},
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nodes: {},
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subflows: {}
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}
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if (subflowDef.configs) {
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// Clone all of the subflow config node definitions and give them new IDs
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for (i in subflowDef.configs) {
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if (subflowDef.configs.hasOwnProperty(i)) {
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node = createNodeInSubflow(subflowInstance.id,subflowDef.configs[i]);
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node_map[node._alias] = node;
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subflowInternalFlowConfig.configs[node.id] = node;
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}
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}
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}
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if (subflowDef.nodes) {
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// Clone all of the subflow node definitions and give them new IDs
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for (i in subflowDef.nodes) {
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if (subflowDef.nodes.hasOwnProperty(i)) {
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node = createNodeInSubflow(subflowInstance.id,subflowDef.nodes[i]);
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node_map[node._alias] = node;
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subflowInternalFlowConfig.nodes[node.id] = node;
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}
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}
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}
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subflowInternalFlowConfig.subflows = clone(subflowDef.subflows || {});
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remapSubflowNodes(subflowInternalFlowConfig.configs,node_map);
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remapSubflowNodes(subflowInternalFlowConfig.nodes,node_map);
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// console.log("Instance config\n",JSON.stringify(subflowInternalFlowConfig,"",2));
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super(parent,globalFlow,subflowInternalFlowConfig);
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this.TYPE = 'subflow';
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this.subflowDef = subflowDef;
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this.subflowInstance = subflowInstance;
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this.node_map = node_map;
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}
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/**
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* Start the subflow.
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* This creates a subflow instance node to handle the inbound messages. It also
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* rewires an subflow internal node that is connected to an output so it is connected
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* to the parent flow nodes the subflow instance is wired to.
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* @param {[type]} diff [description]
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* @return {[type]} [description]
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*/
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start(diff) {
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var self = this;
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// Create a subflow node to accept inbound messages and route appropriately
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var Node = require("../Node");
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var subflowInstanceConfig = {
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id: this.subflowInstance.id,
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type: this.subflowInstance.type,
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z: this.subflowInstance.z,
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name: this.subflowInstance.name,
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wires: [],
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_flow: this
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}
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if (this.subflowDef.in) {
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subflowInstanceConfig.wires = this.subflowDef.in.map(function(n) { return n.wires.map(function(w) { return self.node_map[w.id].id;})})
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subflowInstanceConfig._originalWires = clone(subflowInstanceConfig.wires);
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}
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this.node = new Node(subflowInstanceConfig);
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this.node.on("input", function(msg) { this.send(msg);});
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this.node._updateWires = this.node.updateWires;
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this.node.updateWires = function(newWires) {
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// Wire the subflow outputs
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if (self.subflowDef.out) {
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var node,wires,i,j;
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// Restore the original wiring to the internal nodes
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subflowInstanceConfig.wires = clone(subflowInstanceConfig._originalWires);
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for (i=0;i<self.subflowDef.out.length;i++) {
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wires = self.subflowDef.out[i].wires;
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for (j=0;j<wires.length;j++) {
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if (wires[j].id != self.subflowDef.id) {
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node = self.node_map[wires[j].id];
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if (node._originalWires) {
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node.wires = clone(node._originalWires);
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}
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}
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}
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}
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var modifiedNodes = {};
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var subflowInstanceModified = false;
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for (i=0;i<self.subflowDef.out.length;i++) {
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wires = self.subflowDef.out[i].wires;
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for (j=0;j<wires.length;j++) {
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if (wires[j].id === self.subflowDef.id) {
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subflowInstanceConfig.wires[wires[j].port] = subflowInstanceConfig.wires[wires[j].port].concat(newWires[i]);
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subflowInstanceModified = true;
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} else {
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node = self.node_map[wires[j].id];
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node.wires[wires[j].port] = node.wires[wires[j].port].concat(newWires[i]);
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modifiedNodes[node.id] = node;
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}
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}
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}
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Object.keys(modifiedNodes).forEach(function(id) {
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var node = modifiedNodes[id];
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self.activeNodes[id].updateWires(node.wires);
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});
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if (subflowInstanceModified) {
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self.node._updateWires(subflowInstanceConfig.wires);
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}
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}
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}
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// Wire the subflow outputs
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if (this.subflowDef.out) {
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var modifiedNodes = {};
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for (var i=0;i<this.subflowDef.out.length;i++) {
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// i: the output index
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// This is what this Output is wired to
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wires = this.subflowDef.out[i].wires;
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for (var j=0;j<wires.length;j++) {
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if (wires[j].id === this.subflowDef.id) {
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// A subflow input wired straight to a subflow output
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subflowInstanceConfig.wires[wires[j].port] = subflowInstanceConfig.wires[wires[j].port].concat(this.subflowInstance.wires[i])
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this.node._updateWires(subflowInstanceConfig.wires);
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} else {
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var node = self.node_map[wires[j].id];
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modifiedNodes[node.id] = node;
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if (!node._originalWires) {
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node._originalWires = clone(node.wires);
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}
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node.wires[wires[j].port] = (node.wires[wires[j].port]||[]).concat(this.subflowInstance.wires[i]);
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}
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}
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}
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}
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super.start(diff);
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}
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/**
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* Handle a status event from a node within this flow.
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* @param {Node} node The original node that triggered the event
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* @param {Object} statusMessage The status object
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* @param {Node} reportingNode The node emitting the status event.
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* This could be a subflow instance node when the status
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* is being delegated up.
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* @param {boolean} muteStatus Whether to emit the status event
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* @return {[type]} [description]
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*/
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handleStatus(node,statusMessage,reportingNode,muteStatus) {
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let handled = super.handleStatus(node,statusMessage,reportingNode,muteStatus);
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if (!handled) {
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// No status node on this subflow caught the status message.
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// Pass up to the parent with this subflow's instance as the
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// reporting node
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handled = this.parent.handleStatus(node,statusMessage,this.node,true);
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}
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return handled;
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}
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/**
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* Handle an error event from a node within this flow. If there are no Catch
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* nodes within this flow, pass the event to the parent flow.
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* @param {[type]} node [description]
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* @param {[type]} logMessage [description]
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* @param {[type]} msg [description]
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* @param {[type]} reportingNode [description]
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* @return {[type]} [description]
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*/
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handleError(node,logMessage,msg,reportingNode) {
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let handled = super.handleError(node,logMessage,msg,reportingNode);
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if (!handled) {
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// No catch node on this subflow caught the error message.
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// Pass up to the parent with the subflow's instance as the
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// reporting node.
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handled = this.parent.handleError(node,logMessage,msg,this.node);
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}
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return handled;
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}
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}
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/**
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* Clone a node definition for use within a subflow instance.
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* Give the node a new id and set its _alias property to record
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* its association with the original node definition.
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* @param {[type]} subflowInstanceId [description]
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* @param {[type]} def [description]
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* @return {[type]} [description]
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*/
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function createNodeInSubflow(subflowInstanceId, def) {
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let node = clone(def);
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let nid = redUtil.generateId();
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// console.log("Create Node In subflow",node.id, "--->",nid, "(",node.type,")")
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// node_map[node.id] = node;
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node._alias = node.id;
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node.id = nid;
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node.z = subflowInstanceId;
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return node;
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}
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/**
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* Given an object of {id:nodes} and a map of {old-id:node}, modifiy all
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* properties in the nodes object to reference the new node ids.
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* This handles:
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* - node.wires,
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* - node.scope of Catch and Status nodes,
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* - node.XYZ for any property where XYZ is recognised as an old property
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* @param {[type]} nodes [description]
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* @param {[type]} nodeMap [description]
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* @return {[type]} [description]
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*/
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function remapSubflowNodes(nodes,nodeMap) {
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for (var id in nodes) {
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if (nodes.hasOwnProperty(id)) {
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var node = nodes[id];
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if (node.wires) {
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var outputs = node.wires;
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for (j=0;j<outputs.length;j++) {
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wires = outputs[j];
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for (k=0;k<wires.length;k++) {
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outputs[j][k] = nodeMap[outputs[j][k]].id
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}
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}
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}
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if ((node.type === 'catch' || node.type === 'status') && node.scope) {
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node.scope = node.scope.map(function(id) {
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return nodeMap[id]?nodeMap[id].id:""
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})
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} else {
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for (var prop in node) {
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if (node.hasOwnProperty(prop) && prop !== '_alias') {
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if (nodeMap[node[prop]]) {
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//console.log("Mapped",node.type,node.id,prop,nodeMap[node[prop]].id);
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node[prop] = nodeMap[node[prop]].id;
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}
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}
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}
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}
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}
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}
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}
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function createSubflow(parent,globalFlow,subflowDef,subflowInstance) {
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return new Subflow(parent,globalFlow,subflowDef,subflowInstance)
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}
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module.exports = {
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init: function(runtime) {
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Log = runtime.log;
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},
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create: createSubflow
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}
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