mirror of https://github.com/node-red/node-red.git
85 lines
2.3 KiB
JavaScript
85 lines
2.3 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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var clone = require("clone");
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var when = require("when");
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var util = require("../util");
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function createContext(id,seed) {
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var data = seed || {};
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var obj = seed || {};
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obj.get = function get(key) {
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return util.getMessageProperty(data,key);
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};
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obj.set = function set(key, value) {
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util.setMessageProperty(data,key,value);
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}
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obj.keys = function() {
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return Object.keys(data);
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}
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return obj;
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}
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var contexts = {};
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var globalContext = null;
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function getContext(localId,flowId) {
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var contextId = localId;
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if (flowId) {
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contextId = localId+":"+flowId;
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}
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if (contexts.hasOwnProperty(contextId)) {
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return contexts[contextId];
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}
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var newContext = createContext(contextId);
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if (flowId) {
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newContext.flow = getContext(flowId);
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}
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if (globalContext) {
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newContext.global = globalContext;
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}
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contexts[contextId] = newContext;
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return newContext;
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}
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function deleteContext(id,flowId) {
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var contextId = id;
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if (flowId) {
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contextId = id+":"+flowId;
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}
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delete contexts[contextId];
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}
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function clean(flowConfig) {
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var activeIds = {};
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var contextId;
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var node;
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for (var id in contexts) {
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if (contexts.hasOwnProperty(id)) {
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var idParts = id.split(":");
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if (!flowConfig.allNodes.hasOwnProperty(idParts[0])) {
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delete contexts[id];
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}
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}
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}
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}
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module.exports = {
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init: function(settings) {
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globalContext = createContext("global",settings.functionGlobalContext || {});
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},
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get: getContext,
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delete: deleteContext,
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clean:clean
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};
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