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node-red/red/runtime/nodes/context/localfilesystem.js

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2018-03-15 21:52:17 +01:00
/**
* 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 JsonDB = require('node-json-db');
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var fs = require('fs-extra');
var path = require("path");
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var configs;
var storageBaseDir;
var storages;
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function createStorage(scope) {
var i = scope.indexOf(":")
if(i === -1){
if(scope === "global"){
storages[scope] = new JsonDB(path.join(storageBaseDir,"global",scope), true, true);
}else{ // scope:flow
storages[scope] = new JsonDB(path.join(storageBaseDir,scope,"flow"), true, true);
}
}else{ // scope:local
var ids = scope.split(":")
storages[scope] = new JsonDB(path.join(storageBaseDir,ids[1],ids[0]), true, true);
}
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}
var localfilesystem = {
init: function(_configs) {
configs = _configs;
storages = {};
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if (!configs.dir) {
if(configs.settings && configs.settings.userDir){
storageBaseDir = path.join(configs.settings.userDir,"contexts");
}else{
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try {
fs.statSync(path.join(process.env.NODE_RED_HOME,".config.json"));
storageBaseDir = path.join(process.env.NODE_RED_HOME,"contexts");
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} catch(err) {
try {
// Consider compatibility for older versions
if (process.env.HOMEPATH) {
fs.statSync(path.join(process.env.HOMEPATH,".node-red",".config.json"));
storageBaseDir = path.join(process.env.HOMEPATH,".node-red","contexts");
}
} catch(err) {
}
if (!storageBaseDir) {
storageBaseDir = path.join(process.env.HOME || process.env.USERPROFILE || process.env.HOMEPATH || process.env.NODE_RED_HOME,".node-red","contexts");
}
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}
}
}else{
storageBaseDir = configs.dir;
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}
},
get: function (key, scope) {
if(!storages[scope]){
createStorage(scope);
}
try{
storages[scope].reload();
return storages[scope].getData("/" + key.replace(/\./g,"/"));
}catch(err){
if(err.name === "DataError"){
return undefined;
}else{
throw err;
}
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}
},
set: function (key, value, scope) {
if(!storages[scope]){
createStorage(scope);
}
if(value){
storages[scope].push("/" + key.replace(/\./g,"/"), value);
}else{
storages[scope].delete("/" + key.replace(/\./g,"/"));
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}
},
keys: function (scope) {
if(!storages[scope]){
return [];
}
return Object.keys(storages[scope].getData("/"));
},
delete: function(scope){
if(storages[scope]){
storages[scope].delete("/");
if(scope.indexOf(":") === -1){
fs.removeSync(path.dirname(storages[scope].filename));
}else{
try{
fs.statSync(storages[scope].filename);
fs.unlinkSync(storages[scope].filename);
}catch(err){
console.log("deleted");
}
}
delete storages[scope];
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}
}
};
module.exports = localfilesystem;