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node-red/public/red/nodes.js

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/**
* 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.
**/
RED.nodes = function() {
var node_defs = {};
var nodes = [];
var configNodes = {};
var links = [];
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var defaultWorkspace;
var workspaces = {};
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function registerType(nt,def) {
node_defs[nt] = def;
// TODO: too tightly coupled into palette UI
RED.palette.add(nt,def);
}
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function getID() {
return (1+Math.random()*4294967295).toString(16);
}
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function getType(type) {
return node_defs[type];
}
function addNode(n) {
if (n._def.category == "config") {
configNodes[n.id] = n;
} else {
n.dirty = true;
nodes.push(n);
}
}
function addLink(l) {
links.push(l);
}
function addConfig(c) {
configNodes[c.id] = c;
}
function getNode(id) {
if (id in configNodes) {
return configNodes[id];
} else {
for (var n in nodes) {
if (nodes[n].id == id) {
return nodes[n];
}
}
}
return null;
}
function removeNode(id) {
var removedLinks = [];
if (id in configNodes) {
delete configNodes[id];
} else {
var node = getNode(id);
if (node) {
nodes.splice(nodes.indexOf(node),1);
removedLinks = links.filter(function(l) { return (l.source === node) || (l.target === node); });
removedLinks.map(function(l) {links.splice(links.indexOf(l), 1); });
}
}
return removedLinks;
}
function removeLink(l) {
var index = links.indexOf(l);
if (index != -1) {
links.splice(index,1);
}
}
function refreshValidation() {
for (var n in nodes) {
RED.editor.validateNode(nodes[n]);
}
}
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function addWorkspace(ws) {
workspaces[ws.id] = ws;
}
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function getWorkspace(id) {
return workspaces[id];
}
function removeWorkspace(id) {
delete workspaces[id];
var removedNodes = [];
var removedLinks = [];
for (var n in nodes) {
var node = nodes[n];
if (node.z == id) {
removedNodes.push(node);
}
}
for (var n in removedNodes) {
var rmlinks = removeNode(removedNodes[n].id);
removedLinks = removedLinks.concat(rmlinks);
}
return {nodes:removedNodes,links:removedLinks};
}
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function getAllFlowNodes(node) {
var visited = {};
visited[node.id] = true;
var nns = [node];
var stack = [node];
while(stack.length != 0) {
var n = stack.shift();
var childLinks = links.filter(function(d) { return (d.source === n) || (d.target === n);});
for (var i in childLinks) {
var child = (childLinks[i].source === n)?childLinks[i].target:childLinks[i].source;
if (!visited[child.id]) {
visited[child.id] = true;
nns.push(child);
stack.push(child);
}
}
}
return nns;
}
/**
* Converts a node to an exportable JSON Object
**/
function convertNode(n) {
var node = {};
node.id = n.id;
node.type = n.type;
for (var d in n._def.defaults) {
node[d] = n[d];
}
if (n._def.category != "config") {
node.x = n.x;
node.y = n.y;
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node.z = n.z;
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node.wires = [];
for(var i=0;i<n.outputs;i++) {
node.wires.push([]);
}
var wires = links.filter(function(d){return d.source === n;});
for (var i in wires) {
var w = wires[i];
node.wires[w.sourcePort].push(w.target.id);
}
}
return node;
}
/**
* Converts the current node selection to an exportable JSON Object
**/
function createExportableNodeSet(set) {
var nns = [];
var exportedConfigNodes = {};
for (var n in set) {
var node = set[n].n;
var convertedNode = RED.nodes.convertNode(node);
for (var d in node._def.defaults) {
if (node._def.defaults[d].type && node[d] in configNodes) {
var confNode = configNodes[node[d]];
var exportable = getType(node._def.defaults[d].type).exportable;
if ((exportable == null || exportable)) {
if (!(node[d] in exportedConfigNodes)) {
exportedConfigNodes[node[d]] = true;
nns.unshift(RED.nodes.convertNode(confNode));
}
} else {
convertedNode[d] = "";
}
}
}
nns.push(convertedNode);
}
return nns;
}
//TODO: rename this (createCompleteNodeSet)
function createCompleteNodeSet() {
var nns = [];
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for (var i in workspaces) {
nns.push(workspaces[i]);
}
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for (var i in configNodes) {
nns.push(convertNode(configNodes[i]));
}
for (var i in nodes) {
var node = nodes[i];
nns.push(convertNode(node));
}
return nns;
}
function importNodes(newNodesObj,createNewIds) {
try {
var newNodes;
if (typeof newNodesObj === "string") {
if (newNodesObj == "") {
return;
}
newNodes = JSON.parse(newNodesObj);
} else {
newNodes = newNodesObj;
}
if (!$.isArray(newNodes)) {
newNodes = [newNodes];
}
for (var i in newNodes) {
var n = newNodes[i];
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if (n.type != "workspace" && !getType(n.type)) {
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// TODO: get this UI thing out of here! (see below as well)
RED.notify("<strong>Failed to import nodes</strong>: unrecognised type '"+n.type+"'","error");
return null;
}
}
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for (var i in newNodes) {
var n = newNodes[i];
if (n.type === "workspace") {
if (defaultWorkspace == null) {
defaultWorkspace = n;
}
addWorkspace(n);
RED.view.addWorkspace(n);
}
}
if (defaultWorkspace == null) {
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defaultWorkspace = { type:"workspace", id:getID(), label:"Workspace 1" };
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addWorkspace(defaultWorkspace);
RED.view.addWorkspace(defaultWorkspace);
}
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var node_map = {};
var new_nodes = [];
var new_links = [];
for (var i in newNodes) {
var n = newNodes[i];
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if (n.type !== "workspace") {
var def = getType(n.type);
if (def && def.category == "config") {
if (!RED.nodes.node(n.id)) {
var configNode = {id:n.id,type:n.type,users:[]};
for (var d in def.defaults) {
configNode[d] = n[d];
}
configNode.label = def.label;
configNode._def = def;
RED.nodes.add(configNode);
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}
} else {
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var node = {x:n.x,y:n.y,z:n.z,type:0,wires:n.wires};
if (createNewIds) {
node.z = RED.view.getWorkspace();
node.id = getID();
} else {
node.id = n.id;
if (node.z == null || !workspaces[node.z]) {
node.z = RED.view.getWorkspace();
}
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}
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node.type = n.type;
node._def = def;
if (!node._def) {
node._def = {
color:"#fee",
defaults: {},
label: "unknown: "+n.type,
labelStyle: "node_label_italic",
outputs: n.outputs||n.wires.length
}
}
node.outputs = n.outputs||node._def.outputs;
for (var d in node._def.defaults) {
node[d] = n[d];
if (node._def.defaults[d].type) {
var configNode = RED.nodes.node(n[d]);
if (configNode) {
configNode.users.push(node);
}
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}
}
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addNode(node);
RED.editor.validateNode(node);
node_map[n.id] = node;
new_nodes.push(node);
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}
}
}
for (var i in new_nodes) {
var n = new_nodes[i];
for (var w1 in n.wires) {
var wires = (n.wires[w1] instanceof Array)?n.wires[w1]:[n.wires[w1]];
for (var w2 in wires) {
if (wires[w2] in node_map) {
var link = {source:n,sourcePort:w1,target:node_map[wires[w2]]};
addLink(link);
new_links.push(link);
}
}
}
delete n.wires;
}
return [new_nodes,new_links];
} catch(error) {
//TODO: get this UI thing out of here! (see above as well)
RED.notify("<strong>Error</strong>: "+error,"error");
return null;
}
}
return {
registerType: registerType,
getType: getType,
convertNode: convertNode,
add: addNode,
addLink: addLink,
remove: removeNode,
removeLink: removeLink,
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addWorkspace: addWorkspace,
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removeWorkspace: removeWorkspace,
workspace: getWorkspace,
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eachNode: function(cb) {
for (var n in nodes) {
cb(nodes[n]);
}
},
eachLink: function(cb) {
for (var l in links) {
cb(links[l]);
}
},
eachConfig: function(cb) {
for (var id in configNodes) {
cb(configNodes[id]);
}
},
node: getNode,
import: importNodes,
refreshValidation: refreshValidation,
getAllFlowNodes: getAllFlowNodes,
createExportableNodeSet: createExportableNodeSet,
createCompleteNodeSet: createCompleteNodeSet,
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id: getID,
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nodes: nodes, // TODO: exposed for d3 vis
links: links // TODO: exposed for d3 vis
};
}();