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node-red/packages/node_modules/@node-red/registry/lib/library.js
Ben Hardill ca44af0625
Prevent crash when coreNodesDir is empty (#2831)
* Fix for HTTP-Request not sending body for GET

Background in SO question:
https://stackoverflow.com/q/60356824/504554

* Prevent crash when coreNodesDir points to empty dir

This should prevent a crash when you point to an empty core nodes
directory.

* Matching upstream master
2021-01-25 10:56:23 +00:00

103 lines
3.0 KiB
JavaScript

/**
* 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 exampleRoots = {};
var exampleFlows = null;
function getFlowsFromPath(path) {
return new Promise(function(resolve,reject) {
var result = {};
fs.readdir(path,function(err,files) {
var promises = [];
var validFiles = [];
if (files) {
files.forEach(function(file) {
var fullPath = fspath.join(path,file);
var stats = fs.lstatSync(fullPath);
if (stats.isDirectory()) {
validFiles.push(file);
promises.push(getFlowsFromPath(fullPath));
} else if (/\.json$/.test(file)){
validFiles.push(file);
promises.push(Promise.resolve(file.split(".")[0]))
}
})
}
var i=0;
Promise.all(promises).then(function(results) {
results.forEach(function(r) {
if (typeof r === 'string') {
result.f = result.f||[];
result.f.push(r);
} else {
result.d = result.d||{};
result.d[validFiles[i]] = r;
}
i++;
})
resolve(result);
})
});
})
}
function addNodeExamplesDir(module,path) {
exampleRoots[module] = path;
return getFlowsFromPath(path).then(function(result) {
if (JSON.stringify(result).indexOf('{"f":') === -1) { return; }
exampleFlows = exampleFlows||{};
exampleFlows[module] = result;
});
}
function removeNodeExamplesDir(module) {
delete exampleRoots[module];
if (exampleFlows) {
delete exampleFlows[module];
}
if (exampleFlows && Object.keys(exampleFlows).length === 0) {
exampleFlows = null;
}
}
function init() {
exampleRoots = {};
exampleFlows = null;
}
function getExampleFlows() {
return exampleFlows;
}
function getExampleFlowPath(module,path) {
if (exampleRoots[module]) {
return fspath.join(exampleRoots[module],path)+".json";
}
return null;
}
module.exports = {
init: init,
addExamplesDir: addNodeExamplesDir,
removeExamplesDir: removeNodeExamplesDir,
getExampleFlows: getExampleFlows,
getExampleFlowPath: getExampleFlowPath
}