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node-red/red/runtime/nodes/flows/util.js

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/**
* Copyright 2015 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 clone = require("clone");
var redUtil = require("../../util");
var subflowInstanceRE = /^subflow:(.+)$/;
var typeRegistry = require("../registry");
function diffNodes(oldNode,newNode) {
if (oldNode == null) {
return true;
}
var oldKeys = Object.keys(oldNode).filter(function(p) { return p != "x" && p != "y" && p != "wires" });
var newKeys = Object.keys(newNode).filter(function(p) { return p != "x" && p != "y" && p != "wires" });
if (oldKeys.length != newKeys.length) {
return true;
}
for (var i=0;i<newKeys.length;i++) {
var p = newKeys[i];
if (!redUtil.compareObjects(oldNode[p],newNode[p])) {
return true;
}
}
return false;
}
module.exports = {
diffNodes: diffNodes,
parseConfig: function(config) {
var flow = {};
flow.allNodes = {};
flow.subflows = {};
flow.configs = {};
flow.flows = {};
flow.missingTypes = [];
config.forEach(function(n) {
flow.allNodes[n.id] = clone(n);
if (n.type === 'tab') {
flow.flows[n.id] = n;
flow.flows[n.id].subflows = {};
flow.flows[n.id].configs = {};
flow.flows[n.id].nodes = {};
}
});
config.forEach(function(n) {
if (n.type === 'subflow') {
flow.subflows[n.id] = n;
flow.subflows[n.id].configs = {};
flow.subflows[n.id].nodes = {};
flow.subflows[n.id].instances = [];
}
});
var linkWires = {};
var linkOutNodes = [];
config.forEach(function(n) {
if (n.type !== 'subflow' && n.type !== 'tab') {
var subflowDetails = subflowInstanceRE.exec(n.type);
if ( (subflowDetails && !flow.subflows[subflowDetails[1]]) || (!subflowDetails && !typeRegistry.get(n.type)) ) {
if (flow.missingTypes.indexOf(n.type) === -1) {
flow.missingTypes.push(n.type);
}
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}
var container = null;
if (flow.flows[n.z]) {
container = flow.flows[n.z];
} else if (flow.subflows[n.z]) {
container = flow.subflows[n.z];
}
if (n.hasOwnProperty('x') && n.hasOwnProperty('y')) {
if (subflowDetails) {
var subflowType = subflowDetails[1]
n.subflow = subflowType;
flow.subflows[subflowType].instances.push(n)
}
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if (container) {
container.nodes[n.id] = n;
}
} else {
if (container) {
container.configs[n.id] = n;
} else {
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flow.configs[n.id] = n;
flow.configs[n.id]._users = [];
}
}
if (n.type === 'link in' && n.links) {
// Ensure wires are present in corresponding link out nodes
n.links.forEach(function(id) {
linkWires[id] = linkWires[id]||{};
linkWires[id][n.id] = true;
})
} else if (n.type === 'link out' && n.links) {
linkWires[n.id] = linkWires[n.id]||{};
n.links.forEach(function(id) {
linkWires[n.id][id] = true;
})
linkOutNodes.push(n);
}
}
});
linkOutNodes.forEach(function(n) {
var links = linkWires[n.id];
var targets = Object.keys(links);
n.wires = [targets];
});
var addedTabs = {};
config.forEach(function(n) {
if (n.type !== 'subflow' && n.type !== 'tab') {
for (var prop in n) {
if (n.hasOwnProperty(prop) && prop !== 'id' && prop !== 'wires' && prop !== 'type' && prop !== '_users' && flow.configs[n[prop]]) {
// This property references a global config node
flow.configs[n[prop]]._users.push(n.id)
}
}
if (n.z && !flow.subflows[n.z]) {
if (!flow.flows[n.z]) {
flow.flows[n.z] = {type:'tab',id:n.z};
flow.flows[n.z].subflows = {};
flow.flows[n.z].configs = {};
flow.flows[n.z].nodes = {};
addedTabs[n.z] = flow.flows[n.z];
}
if (addedTabs[n.z]) {
if (n.hasOwnProperty('x') && n.hasOwnProperty('y')) {
addedTabs[n.z].nodes[n.id] = n;
} else {
addedTabs[n.z].configs[n.id] = n;
}
}
}
}
});
return flow;
},
diffConfigs: function(oldConfig, newConfig) {
var id;
var node;
var nn;
var wires;
var j,k;
var changedSubflows = {};
var added = {};
var removed = {};
var changed = {};
var wiringChanged = {};
var linkMap = {};
for (id in oldConfig.allNodes) {
if (oldConfig.allNodes.hasOwnProperty(id)) {
node = oldConfig.allNodes[id];
// build the map of what this node was previously wired to
if (node.wires) {
linkMap[node.id] = linkMap[node.id] || [];
for (j=0;j<node.wires.length;j++) {
wires = node.wires[j];
for (k=0;k<wires.length;k++) {
linkMap[node.id].push(wires[k]);
nn = oldConfig.allNodes[wires[k]];
if (nn) {
linkMap[nn.id] = linkMap[nn.id] || [];
linkMap[nn.id].push(node.id);
}
}
}
}
// This node has been removed
if (!newConfig.allNodes.hasOwnProperty(id)) {
removed[id] = node;
// Mark the container as changed
if (newConfig.allNodes[removed[id].z]) {
changed[removed[id].z] = newConfig.allNodes[removed[id].z];
if (changed[removed[id].z].type === "subflow") {
changedSubflows[removed[id].z] = changed[removed[id].z];
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//delete removed[id];
}
}
} else {
// This node has a material configuration change
if (diffNodes(node,newConfig.allNodes[id]) || newConfig.allNodes[id].credentials) {
changed[id] = newConfig.allNodes[id];
if (changed[id].type === "subflow") {
changedSubflows[id] = changed[id];
}
// Mark the container as changed
if (newConfig.allNodes[changed[id].z]) {
changed[changed[id].z] = newConfig.allNodes[changed[id].z];
if (changed[changed[id].z].type === "subflow") {
changedSubflows[changed[id].z] = changed[changed[id].z];
delete changed[id];
}
}
}
// This node's wiring has changed
if (!redUtil.compareObjects(node.wires,newConfig.allNodes[id].wires)) {
wiringChanged[id] = newConfig.allNodes[id];
// Mark the container as changed
if (newConfig.allNodes[wiringChanged[id].z]) {
changed[wiringChanged[id].z] = newConfig.allNodes[wiringChanged[id].z];
if (changed[wiringChanged[id].z].type === "subflow") {
changedSubflows[wiringChanged[id].z] = changed[wiringChanged[id].z];
delete wiringChanged[id];
}
}
}
}
}
}
// Look for added nodes
for (id in newConfig.allNodes) {
if (newConfig.allNodes.hasOwnProperty(id)) {
node = newConfig.allNodes[id];
// build the map of what this node is now wired to
if (node.wires) {
linkMap[node.id] = linkMap[node.id] || [];
for (j=0;j<node.wires.length;j++) {
wires = node.wires[j];
for (k=0;k<wires.length;k++) {
if (linkMap[node.id].indexOf(wires[k]) === -1) {
linkMap[node.id].push(wires[k]);
}
nn = newConfig.allNodes[wires[k]];
if (nn) {
linkMap[nn.id] = linkMap[nn.id] || [];
if (linkMap[nn.id].indexOf(node.id) === -1) {
linkMap[nn.id].push(node.id);
}
}
}
}
}
// This node has been added
if (!oldConfig.allNodes.hasOwnProperty(id)) {
added[id] = node;
// Mark the container as changed
if (newConfig.allNodes[added[id].z]) {
changed[added[id].z] = newConfig.allNodes[added[id].z];
if (changed[added[id].z].type === "subflow") {
changedSubflows[added[id].z] = changed[added[id].z];
delete added[id];
}
}
}
}
}
var madeChange;
// Loop through the nodes looking for references to changed config nodes
// Repeat the loop if anything is marked as changed as it may need to be
// propagated to parent nodes.
// TODO: looping through all nodes every time is a bit inefficient - could be more targeted
do {
madeChange = false;
for (id in newConfig.allNodes) {
if (newConfig.allNodes.hasOwnProperty(id)) {
node = newConfig.allNodes[id];
for (var prop in node) {
if (node.hasOwnProperty(prop) && prop != "z" && prop != "id" && prop != "wires") {
// This node has a property that references a changed/removed node
// Assume it is a config node change and mark this node as
// changed.
if (changed[node[prop]] || removed[node[prop]]) {
if (!changed[node.id]) {
madeChange = true;
changed[node.id] = node;
// This node exists within subflow template
// Mark the template as having changed
if (newConfig.allNodes[node.z]) {
changed[node.z] = newConfig.allNodes[node.z];
if (changed[node.z].type === "subflow") {
changedSubflows[node.z] = changed[node.z];
}
}
}
}
}
}
}
}
} while(madeChange===true)
// Find any nodes that exist on a subflow template and remove from changed
// list as the parent subflow will now be marked as containing a change
for (id in newConfig.allNodes) {
if (newConfig.allNodes.hasOwnProperty(id)) {
node = newConfig.allNodes[id];
if (newConfig.allNodes[node.z] && newConfig.allNodes[node.z].type === "subflow") {
delete changed[node.id];
}
}
}
// Recursively mark all instances of changed subflows as changed
var changedSubflowStack = Object.keys(changedSubflows);
while(changedSubflowStack.length > 0) {
var subflowId = changedSubflowStack.pop();
for (id in newConfig.allNodes) {
if (newConfig.allNodes.hasOwnProperty(id)) {
node = newConfig.allNodes[id];
if (node.type === 'subflow:'+subflowId) {
if (!changed[node.id]) {
changed[node.id] = node;
if (!changed[changed[node.id].z] && newConfig.allNodes[changed[node.id].z]) {
changed[changed[node.id].z] = newConfig.allNodes[changed[node.id].z];
if (newConfig.allNodes[changed[node.id].z].type === "subflow") {
// This subflow instance is inside a subflow. Add the
// containing subflow to the stack to mark
changedSubflowStack.push(changed[node.id].z);
delete changed[node.id];
}
}
}
}
}
}
}
var diff = {
added:Object.keys(added),
changed:Object.keys(changed),
removed:Object.keys(removed),
rewired:Object.keys(wiringChanged),
linked:[]
}
// Traverse the links of all modified nodes to mark the connected nodes
var modifiedNodes = diff.added.concat(diff.changed).concat(diff.removed).concat(diff.rewired);
var visited = {};
while(modifiedNodes.length > 0) {
node = modifiedNodes.pop();
if (!visited[node]) {
visited[node] = true;
if (linkMap[node]) {
if (!changed[node] && !added[node] && !removed[node] && !wiringChanged[node]) {
diff.linked.push(node);
}
modifiedNodes = modifiedNodes.concat(linkMap[node]);
}
}
}
// for (id in newConfig.allNodes) {
// console.log(
// (added[id]?"+":(changed[id]?"!":" "))+(wiringChanged[id]?"w":" ")+(diff.linked.indexOf(id)!==-1?"~":" "),
// id,
// newConfig.allNodes[id].type,
// newConfig.allNodes[id].name||newConfig.allNodes[id].label||""
// );
// }
// for (id in removed) {
// console.log(
// "- "+(diff.linked.indexOf(id)!==-1?"~":" "),
// id,
// oldConfig.allNodes[id].type,
// oldConfig.allNodes[id].name||oldConfig.allNodes[id].label||""
// );
// }
return diff;
}
}