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node-red/red/runtime/library/index.js

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/**
* 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 fs = require('fs');
var fspath = require('path');
var runtime;
var knownTypes = {};
var storage;
function init(_runtime) {
runtime = _runtime;
storage = runtime.storage;
knownTypes = {};
}
function registerType(id,type) {
if (knownTypes.hasOwnProperty(type)) {
throw new Error(`Library type '${type}' already registerd by ${id}'`)
}
knownTypes[type] = id;
}
function getAllEntries(type) {
if (!knownTypes.hasOwnProperty(type)) {
throw new Error(`Unknown library type '${type}'`);
}
}
function getEntry(type,path) {
if (type !== 'flows') {
if (!knownTypes.hasOwnProperty(type)) {
throw new Error(`Unknown library type '${type}'`);
}
return storage.getLibraryEntry(type,path);
} else {
return new Promise(function(resolve,reject) {
if (path.indexOf("_examples_/") === 0) {
var m = /^_examples_\/(@.*?\/[^\/]+|[^\/]+)\/(.*)$/.exec(path);
if (m) {
var module = m[1];
var entryPath = m[2];
var fullPath = runtime.nodes.getNodeExampleFlowPath(module,entryPath);
if (fullPath) {
try {
fs.readFile(fullPath,'utf8',function(err, data) {
runtime.log.audit({event: "library.get",type:"flow",path:path});
if (err) {
return reject(err);
}
return resolve(data);
})
} catch(err) {
return reject(err);
}
}
} else {
// IF we get here, we didn't find the file
var error = new Error("not_found");
error.code = "not_found";
return reject(error);
}
} else {
resolve(storage.getFlow(path));
}
});
}
}
function saveEntry(type,path,meta,body) {
if (type !== 'flows') {
if (!knownTypes.hasOwnProperty(type)) {
throw new Error(`Unknown library type '${type}'`);
}
return storage.saveLibraryEntry(type,path,meta,body);
} else {
return storage.saveFlow(path,body);
}
}
module.exports = {
init: init,
registerType: registerType,
getAllEntries: getAllEntries,
getEntry: getEntry,
saveEntry: saveEntry
}