add translate tags function

README.md

@@ -69,6 +69,9 @@ epflMenuApi.findResto().then(function(restos) {
 }).catch(function(err) {
   console.log(err);
 });
+
+let tags = epflMenuApi.translateTags('Poisson,Viande,Chinois');
+console.log(tags)  //=> 'Fish,Meat,Chinese'
 ```
 
 API
@@ -150,6 +153,18 @@ Type: `number`
 
 Restaurant id.
 
+### .translateTags(str)
+
+Type: `function`
+
+Translate tags from French to English.
+
+##### str
+
+Type: `string`
+
+Tags to translate.
+
 See also
 --------
 

src/index.js

@@ -116,3 +116,20 @@ exports.findResto = (id) => {
     }).catch((err) => reject(err));
   });
 };
+
+exports.translateTags = (strTags) => {
+  if (!strTags) {
+    throw new TypeError('Not a valid tags');
+  }
+
+  let listTags = prepareTags(strTags);
+  let translatedList = [];
+  for (var i = 0; i < listTags.length; i++) {
+    if (TAGS[listTags[i]]) {
+      translatedList.push(TAGS[listTags[i]]);
+    } else {
+      translatedList.push(listTags[i]);
+    }
+  }
+  return translatedList.join(',');
+};

test/test-translateTags.js

@@ -0,0 +1,29 @@
+/*
+ * (c) William Belle, 2019.
+ * See the LICENSE file for more details.
+ */
+
+require('chai').should();
+
+const epflMenuApi = require('../src/index.js');
+
+describe('epfl-menu-api translateTags', function () {
+  this.timeout(10000);
+
+  it('should throw an exception with undefined', function () {
+    (function () {
+      epflMenuApi.translateTags(undefined);
+    }).should.throw('Not a valid tags');
+  });
+
+  it('should throw an exception with ""', function () {
+    (function () {
+      epflMenuApi.translateTags('');
+    }).should.throw('Not a valid tags');
+  });
+
+  it('should translate tags "Poisson,Viande,Chinois,Toto"', function () {
+    let tags = epflMenuApi.translateTags('Poisson,Viande,Chinois,Toto');
+    tags.should.equal('Fish,Meat,Chinese,Toto');
+  });
+});