chore: update eslint & config to latest

Replace `var` with `const` and `let`.

Signed-off-by: Miroslav Bajtoš <mbajtoss@gmail.com>

lib/clone.js

@@ -15,10 +15,10 @@ module.exports = cloneAllProperties;
 function cloneAllProperties(data, err) {
   data.name = err.name;
   data.message = err.message;
-  for (var p in err) {
+  for (const p in err) {
     if ((p in data)) continue;
     data[p] = err[p];
   }
   // stack is appended last to ensure order is the same for response
   data.stack = err.stack;
-};
+}

lib/content-negotiation.js

@@ -4,12 +4,12 @@
 // License text available at https://opensource.org/licenses/MIT
 
 'use strict';
-var accepts = require('accepts');
+const accepts = require('accepts');
-var debug = require('debug')('strong-error-handler:http-response');
+const debug = require('debug')('strong-error-handler:http-response');
-var sendJson = require('./send-json');
+const sendJson = require('./send-json');
-var sendHtml = require('./send-html');
+const sendHtml = require('./send-html');
-var sendXml = require('./send-xml');
+const sendXml = require('./send-xml');
-var util = require('util');
+const util = require('util');
 
 module.exports = negotiateContentProducer;
 
@@ -23,14 +23,14 @@ module.exports = negotiateContentProducer;
  * @returns {Function} Operation function with signature `fn(res, data)`
  */
 function negotiateContentProducer(req, logWarning, options) {
-  var SUPPORTED_TYPES = [
+  const SUPPORTED_TYPES = [
     'application/json', 'json',
     'text/html', 'html',
     'text/xml', 'xml',
   ];
 
   options = options || {};
-  var defaultType = 'json';
+  let defaultType = 'json';
 
   // checking if user provided defaultType is supported
   if (options.defaultType) {
@@ -52,9 +52,9 @@ function negotiateContentProducer(req, logWarning, options) {
   // Accepts: */*, application/json, text/html ---> will resolve as application/json
   // eg. Chrome accepts defaults to `text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*`
   // In this case `resolvedContentType` will result as: `text/html` due to the order given
-  var resolvedContentType = accepts(req).types(SUPPORTED_TYPES);
+  const resolvedContentType = accepts(req).types(SUPPORTED_TYPES);
   debug('Resolved content-type', resolvedContentType);
-  var contentType = resolvedContentType || defaultType;
+  let contentType = resolvedContentType || defaultType;
 
   if (options.negotiateContentType === false) {
     if (SUPPORTED_TYPES.indexOf(options.defaultType) > -1) {
@@ -71,13 +71,13 @@ function negotiateContentProducer(req, logWarning, options) {
   // to receive _format from user's url param to overide the content type
   // req.query (eg /api/Users/1?_format=json will overide content negotiation
   // https://github.com/strongloop/strong-remoting/blob/ac3093dcfbb787977ca0229b0f672703859e52e1/lib/http-context.js#L643-L645
-  var query = req.query || {};
+  const query = req.query || {};
   if (query._format) {
     if (SUPPORTED_TYPES.indexOf(query._format) > -1) {
       contentType = query._format;
     } else {
       // format passed through query but not supported
-      var msg = util.format('Response _format "%s" is not supported' +
+      const msg = util.format('Response _format "%s" is not supported' +
         'used "%s" instead"', query._format, defaultType);
       logWarning(msg);
     }

lib/data-builder.js

@@ -5,8 +5,8 @@
 
 'use strict';
 
-var cloneAllProperties = require('../lib/clone.js');
+const cloneAllProperties = require('../lib/clone.js');
-var httpStatus = require('http-status');
+const httpStatus = require('http-status');
 
 module.exports = buildResponseData;
 
@@ -44,7 +44,7 @@ function buildResponseData(err, options) {
   fillSafeFields(data, err, safeFields);
 
   return data;
-};
+}
 
 function serializeArrayOfErrors(errors, options) {
   const details = errors.map(e => buildResponseData(e, options));

lib/handler.js

@@ -5,14 +5,14 @@
 
 'use strict';
 
-var path = require('path');
+const path = require('path');
-var SG = require('strong-globalize');
+const SG = require('strong-globalize');
 SG.SetRootDir(path.resolve(__dirname, '..'));
-var buildResponseData = require('./data-builder');
+const buildResponseData = require('./data-builder');
-var debug = require('debug')('strong-error-handler');
+const debug = require('debug')('strong-error-handler');
-var format = require('util').format;
+const format = require('util').format;
-var logToConsole = require('./logger');
+const logToConsole = require('./logger');
-var negotiateContentProducer = require('./content-negotiation');
+const negotiateContentProducer = require('./content-negotiation');
 
 function noop() {
 }
@@ -29,13 +29,13 @@ function createStrongErrorHandler(options) {
   debug('Initializing with options %j', options);
 
   // Log all errors via console.error (enabled by default)
-  var logError = options.log !== false ? logToConsole : noop;
+  const logError = options.log !== false ? logToConsole : noop;
 
   return function strongErrorHandler(err, req, res, next) {
     logError(req, err);
     writeErrorToResponse(err, req, res, options);
   };
-};
+}
 
 /**
  * Writes thrown error to response
@@ -59,20 +59,20 @@ function writeErrorToResponse(err, req, res, options) {
   if (!err.status && !err.statusCode && res.statusCode >= 400)
     err.statusCode = res.statusCode;
 
-  var data = buildResponseData(err, options);
+  const data = buildResponseData(err, options);
   debug('Response status %s data %j', data.statusCode, data);
 
   res.setHeader('X-Content-Type-Options', 'nosniff');
   res.statusCode = data.statusCode;
 
-  var sendResponse = negotiateContentProducer(req, warn, options);
+  const sendResponse = negotiateContentProducer(req, warn, options);
   sendResponse(res, data);
 
   function warn(msg) {
     res.header('X-Warning', msg);
     debug(msg);
   }
-};
+}
 
 exports = module.exports = createStrongErrorHandler;
 exports.writeErrorToResponse = writeErrorToResponse;

lib/logger.js

@@ -5,8 +5,8 @@
 
 'use strict';
 
-var format = require('util').format;
+const format = require('util').format;
-var g = require('strong-globalize')();
+const g = require('strong-globalize')();
 
 module.exports = function logToConsole(req, err) {
   if (!Array.isArray(err)) {
@@ -15,9 +15,9 @@ module.exports = function logToConsole(req, err) {
     return;
   }
 
-  var errMsg = g.f('Unhandled array of errors for request %s %s\n',
+  const errMsg = g.f('Unhandled array of errors for request %s %s\n',
     req.method, req.url);
-  var errors = err.map(formatError).join('\n');
+  const errors = err.map(formatError).join('\n');
   console.error(errMsg, errors);
 };
 

lib/send-html.js

@@ -4,12 +4,12 @@
 // License text available at https://opensource.org/licenses/MIT
 
 'use strict';
-var ejs = require('ejs');
+const ejs = require('ejs');
-var fs = require('fs');
+const fs = require('fs');
-var path = require('path');
+const path = require('path');
 
-var assetDir = path.resolve(__dirname, '../views');
+const assetDir = path.resolve(__dirname, '../views');
-var compiledTemplates = {
+const compiledTemplates = {
   // loading default template and stylesheet
   default: loadDefaultTemplates(),
 };
@@ -17,9 +17,9 @@ var compiledTemplates = {
 module.exports = sendHtml;
 
 function sendHtml(res, data, options) {
-  var toRender = {options: {}, data: data};
+  const toRender = {options: {}, data: data};
   // TODO: ability to call non-default template functions from options
-  var body = compiledTemplates.default(toRender);
+  const body = compiledTemplates.default(toRender);
   sendReponse(res, body);
 }
 
@@ -30,14 +30,14 @@ function sendHtml(res, data, options) {
  * @returns {Function} render function with signature fn(data);
  */
 function compileTemplate(filepath) {
-  var options = {cache: true, filename: filepath};
+  const options = {cache: true, filename: filepath};
-  var fileContent = fs.readFileSync(filepath, 'utf8');
+  const fileContent = fs.readFileSync(filepath, 'utf8');
   return ejs.compile(fileContent, options);
 }
 
 // loads and cache default error templates
 function loadDefaultTemplates() {
-  var defaultTemplate = path.resolve(assetDir, 'default-error.ejs');
+  const defaultTemplate = path.resolve(assetDir, 'default-error.ejs');
   return compileTemplate(defaultTemplate);
 }
 

lib/send-json.js

@@ -5,10 +5,10 @@
 
 'use strict';
 
-var safeStringify = require('fast-safe-stringify');
+const safeStringify = require('fast-safe-stringify');
 
 module.exports = function sendJson(res, data) {
-  var content = safeStringify({error: data});
+  const content = safeStringify({error: data});
   res.setHeader('Content-Type', 'application/json; charset=utf-8');
   res.end(content, 'utf-8');
 };

lib/send-xml.js

@@ -5,10 +5,10 @@
 
 'use strict';
 
-var js2xmlparser = require('js2xmlparser');
+const js2xmlparser = require('js2xmlparser');
 
 module.exports = function sendXml(res, data) {
-  var content = js2xmlparser.parse('error', data);
+  const content = js2xmlparser.parse('error', data);
   res.setHeader('Content-Type', 'text/xml; charset=utf-8');
   res.end(content, 'utf-8');
 };

package.json

@@ -28,8 +28,8 @@
   },
   "devDependencies": {
     "chai": "^4.1.2",
-    "eslint": "^4.19.1",
+    "eslint": "^6.5.1",
-    "eslint-config-loopback": "^10.0.0",
+    "eslint-config-loopback": "^13.1.0",
     "express": "^4.16.3",
     "mocha": "^5.2.0",
     "supertest": "^3.1.0"

test/handler.test.js

@@ -5,13 +5,13 @@
 
 'use strict';
 
-var cloneAllProperties = require('../lib/clone.js');
+const cloneAllProperties = require('../lib/clone.js');
-var debug = require('debug')('test');
+const debug = require('debug')('test');
-var expect = require('chai').expect;
+const expect = require('chai').expect;
-var express = require('express');
+const express = require('express');
-var strongErrorHandler = require('..');
+const strongErrorHandler = require('..');
-var supertest = require('supertest');
+const supertest = require('supertest');
-var util = require('util');
+const util = require('util');
 
 describe('strong-error-handler', function() {
   before(setupHttpServerAndClient);
@@ -27,7 +27,7 @@ describe('strong-error-handler', function() {
 
   it('handles response headers already sent', function(done) {
     givenErrorHandlerForError();
-    var handler = _requestHandler;
+    const handler = _requestHandler;
     _requestHandler = function(req, res, next) {
       res.end('empty');
       process.nextTick(function() {
@@ -70,7 +70,7 @@ describe('strong-error-handler', function() {
 
     it('handles error from `res.statusCode`', function(done) {
       givenErrorHandlerForError();
-      var handler = _requestHandler;
+      const handler = _requestHandler;
       _requestHandler = function(req, res, next) {
         res.statusCode = 507;
         handler(req, res, next);
@@ -84,7 +84,7 @@ describe('strong-error-handler', function() {
   });
 
   context('logging', function() {
-    var logs;
+    let logs;
 
     beforeEach(redirectConsoleError);
     afterEach(restoreConsoleError);
@@ -129,7 +129,7 @@ describe('strong-error-handler', function() {
       request.get('/api').end(function(err) {
         if (err) return done(err);
 
-        var msg = logs[0];
+        const msg = logs[0];
         // the request method
         expect(msg).to.contain('GET');
         // the request path
@@ -152,7 +152,7 @@ describe('strong-error-handler', function() {
       request.get('/api').end(function(err) {
         if (err) return done(err);
 
-        var msg = logs[0];
+        const msg = logs[0];
         // the request method
         expect(msg).to.contain('GET');
         // the request path
@@ -171,17 +171,17 @@ describe('strong-error-handler', function() {
       givenErrorHandlerForError('STRING ERROR', {log: true});
       request.get('/').end(function(err) {
         if (err) return done(err);
-        var msg = logs[0];
+        const msg = logs[0];
         expect(msg).to.contain('STRING ERROR');
         done();
       });
     });
 
-    var _consoleError = console.error;
+    const _consoleError = console.error;
     function redirectConsoleError() {
       logs = [];
       console.error = function() {
-        var msg = util.format.apply(util, arguments);
+        const msg = util.format.apply(util, arguments);
         logs.push(msg);
       };
     }
@@ -194,7 +194,7 @@ describe('strong-error-handler', function() {
 
   context('JSON response', function() {
     it('contains all error properties when debug=true', function(done) {
-      var error = new ErrorWithProps({
+      const error = new ErrorWithProps({
         message: 'a test error message',
         code: 'MACHINE_READABLE_CODE',
         details: 'some details',
@@ -205,7 +205,7 @@ describe('strong-error-handler', function() {
       requestJson().end(function(err, res) {
         if (err) return done(err);
 
-        var expectedData = {
+        const expectedData = {
           statusCode: 500,
           message: 'a test error message',
           name: 'ErrorWithProps',
@@ -222,7 +222,7 @@ describe('strong-error-handler', function() {
 
     it('includes code property for 4xx status codes when debug=false',
       function(done) {
-        var error = new ErrorWithProps({
+        const error = new ErrorWithProps({
           statusCode: 400,
           message: 'error with code',
           name: 'ErrorWithCode',
@@ -233,7 +233,7 @@ describe('strong-error-handler', function() {
         requestJson().end(function(err, res) {
           if (err) return done(err);
 
-          var expectedData = {
+          const expectedData = {
             statusCode: 400,
             message: 'error with code',
             name: 'ErrorWithCode',
@@ -247,7 +247,7 @@ describe('strong-error-handler', function() {
 
     it('excludes code property for 5xx status codes when debug=false',
       function(done) {
-        var error = new ErrorWithProps({
+        const error = new ErrorWithProps({
           statusCode: 500,
           code: 'MACHINE_READABLE_CODE',
         });
@@ -256,7 +256,7 @@ describe('strong-error-handler', function() {
         requestJson().end(function(err, res) {
           if (err) return done(err);
 
-          var expectedData = {
+          const expectedData = {
             statusCode: 500,
             message: 'Internal Server Error',
           };
@@ -268,12 +268,12 @@ describe('strong-error-handler', function() {
 
     it('contains non-enumerable Error properties when debug=true',
       function(done) {
-        var error = new Error('a test error message');
+        const error = new Error('a test error message');
         givenErrorHandlerForError(error, {debug: true});
         requestJson().end(function(err, res) {
           if (err) return done(err);
           expect(res.body).to.have.property('error');
-          var resError = res.body.error;
+          const resError = res.body.error;
           expect(resError).to.have.property('name', 'Error');
           expect(resError).to.have.property('message',
             'a test error message');
@@ -283,7 +283,7 @@ describe('strong-error-handler', function() {
       });
 
     it('should allow setting safe fields when status=5xx', function(done) {
-      var error = new ErrorWithProps({
+      const error = new ErrorWithProps({
         name: 'Error',
         safeField: 'SAFE',
         unsafeField: 'UNSAFE',
@@ -304,7 +304,7 @@ describe('strong-error-handler', function() {
     });
 
     it('safe fields falls back to existing data', function(done) {
-      var error = new ErrorWithProps({
+      const error = new ErrorWithProps({
         name: 'Error',
         isSafe: false,
       });
@@ -322,7 +322,7 @@ describe('strong-error-handler', function() {
     });
 
     it('should allow setting safe fields when status=4xx', function(done) {
-      var error = new ErrorWithProps({
+      const error = new ErrorWithProps({
         name: 'Error',
         statusCode: 422,
         safeField: 'SAFE',
@@ -344,7 +344,7 @@ describe('strong-error-handler', function() {
     });
 
     it('contains subset of properties when status=4xx', function(done) {
-      var error = new ErrorWithProps({
+      const error = new ErrorWithProps({
         name: 'ValidationError',
         message: 'The model instance is not valid.',
         statusCode: 422,
@@ -370,7 +370,7 @@ describe('strong-error-handler', function() {
 
     it('contains only safe info when status=5xx', function(done) {
       // Mock an error reported by fs.readFile
-      var error = new ErrorWithProps({
+      const error = new ErrorWithProps({
         name: 'Error',
         message: 'ENOENT: no such file or directory, open "/etc/passwd"',
         errno: -2,
@@ -394,7 +394,7 @@ describe('strong-error-handler', function() {
     });
 
     it('handles array argument as 500 when debug=false', function(done) {
-      var errors = [new Error('ERR1'), new Error('ERR2'), 'ERR STRING'];
+      const errors = [new Error('ERR1'), new Error('ERR2'), 'ERR STRING'];
       givenErrorHandlerForError(errors);
 
       requestJson().expect(500).end(function(err, res) {
@@ -521,9 +521,9 @@ describe('strong-error-handler', function() {
     });
 
     it('handles Error objects containing circular properties', function(done) {
-      var circularObject = {};
+      const circularObject = {};
       circularObject.recursiveProp = circularObject;
-      var error = new ErrorWithProps({
+      const error = new ErrorWithProps({
         statusCode: 422,
         message: 'The model instance is not valid.',
         name: 'ValidationError',
@@ -550,7 +550,7 @@ describe('strong-error-handler', function() {
 
   context('HTML response', function() {
     it('contains all error properties when debug=true', function(done) {
-      var error = new ErrorWithProps({
+      const error = new ErrorWithProps({
         message: 'a test error message',
         details: 'some details',
         extra: 'sensitive data',
@@ -607,7 +607,7 @@ describe('strong-error-handler', function() {
       });
 
     it('contains subset of properties when status=4xx', function(done) {
-      var error = new ErrorWithProps({
+      const error = new ErrorWithProps({
         name: 'ValidationError',
         message: 'The model instance is not valid.',
         statusCode: 422,
@@ -618,7 +618,7 @@ describe('strong-error-handler', function() {
       requestHTML()
         .end(function(err, res) {
           expect(res.statusCode).to.eql(422);
-          var body = res.error.text;
+          const body = res.error.text;
           expect(body).to.match(/some details/);
           expect(body).to.not.match(/sensitive data/);
           expect(body).to.match(/<title>ValidationError<\/title>/);
@@ -629,7 +629,7 @@ describe('strong-error-handler', function() {
 
     it('contains only safe info when status=5xx', function(done) {
       // Mock an error reported by fs.readFile
-      var error = new ErrorWithProps({
+      const error = new ErrorWithProps({
         name: 'Error',
         message: 'ENOENT: no such file or directory, open "/etc/passwd"',
         errno: -2,
@@ -642,7 +642,7 @@ describe('strong-error-handler', function() {
       requestHTML()
         .end(function(err, res) {
           expect(res.statusCode).to.eql(500);
-          var body = res.error.text;
+          const body = res.error.text;
           expect(body).to.not.match(/\/etc\/password/);
           expect(body).to.not.match(/-2/);
           expect(body).to.not.match(/ENOENT/);
@@ -662,7 +662,7 @@ describe('strong-error-handler', function() {
 
   context('XML response', function() {
     it('contains all error properties when debug=true', function(done) {
-      var error = new ErrorWithProps({
+      const error = new ErrorWithProps({
         message: 'a test error message',
         details: 'some details',
         extra: 'sensitive data',
@@ -680,7 +680,7 @@ describe('strong-error-handler', function() {
     });
 
     it('contains subset of properties when status=4xx', function(done) {
-      var error = new ErrorWithProps({
+      const error = new ErrorWithProps({
         name: 'ValidationError',
         message: 'The model instance is not valid.',
         statusCode: 422,
@@ -691,7 +691,7 @@ describe('strong-error-handler', function() {
       requestXML()
         .end(function(err, res) {
           expect(res.statusCode).to.eql(422);
-          var body = res.error.text;
+          const body = res.error.text;
           expect(body).to.match(/<details>some details<\/details>/);
           expect(body).to.not.match(/<extra>sensitive data<\/extra>/);
           expect(body).to.match(/<name>ValidationError<\/name>/);
@@ -704,7 +704,7 @@ describe('strong-error-handler', function() {
 
     it('contains only safe info when status=5xx', function(done) {
       // Mock an error reported by fs.readFile
-      var error = new ErrorWithProps({
+      const error = new ErrorWithProps({
         name: 'Error',
         message: 'ENOENT: no such file or directory, open "/etc/passwd"',
         errno: -2,
@@ -717,7 +717,7 @@ describe('strong-error-handler', function() {
       requestXML()
         .end(function(err, res) {
           expect(res.statusCode).to.eql(500);
-          var body = res.error.text;
+          const body = res.error.text;
           expect(body).to.not.match(/\/etc\/password/);
           expect(body).to.not.match(/-2/);
           expect(body).to.not.match(/ENOENT/);
@@ -848,7 +848,7 @@ describe('strong-error-handler', function() {
   });
 
   it('does not modify "options" argument', function(done) {
-    var options = {log: false, debug: false};
+    const options = {log: false, debug: false};
     givenErrorHandlerForError(new Error(), options);
     request.get('/').end(function(err) {
       if (err) return done(err);
@@ -858,7 +858,7 @@ describe('strong-error-handler', function() {
   });
 });
 
-var app, _requestHandler, request, server;
+let app, _requestHandler, request, server;
 function resetRequestHandler() {
   _requestHandler = null;
 }
@@ -874,7 +874,7 @@ function givenErrorHandlerForError(error, options) {
     options.log = false;
   }
 
-  var handler = strongErrorHandler(options);
+  const handler = strongErrorHandler(options);
   _requestHandler = function(req, res, next) {
     debug('Invoking strong-error-handler');
     handler(error, req, res, next);
@@ -885,7 +885,7 @@ function setupHttpServerAndClient(done) {
   app = express();
   app.use(function(req, res, next) {
     if (!_requestHandler) {
-      var msg = 'Error handler middleware was not setup in this test';
+      const msg = 'Error handler middleware was not setup in this test';
       console.error(msg);
       res.statusCode = 500;
       res.setHeader('Content-Type', 'text/plain; charset=utf-8');
@@ -907,7 +907,7 @@ function setupHttpServerAndClient(done) {
   });
 
   server = app.listen(0, function() {
-    var url = 'http://127.0.0.1:' + this.address().port;
+    const url = 'http://127.0.0.1:' + this.address().port;
     debug('Test server listening on %s', url);
     request = supertest(app);
     done();
@@ -924,7 +924,7 @@ function stopHttpServerAndClient() {
 
 function ErrorWithProps(props) {
   this.name = props.name || 'ErrorWithProps';
-  for (var p in props) {
+  for (const p in props) {
     this[p] = props[p];
   }
 
@@ -936,7 +936,7 @@ function ErrorWithProps(props) {
 util.inherits(ErrorWithProps, Error);
 
 function getExpectedErrorData(err) {
-  var data = {};
+  const data = {};
   cloneAllProperties(data, err);
   return data;
 }