feat(api): Add a challenge API, GET idToNameMap

api-server/common/models/challenge.js

@@ -1,12 +1,52 @@
 import { Observable } from 'rx';
+import { isEmpty } from 'lodash';
 
 export default function(Challenge) {
+  let challengeIdToNameMap;
+
   Challenge.on('dataSourceAttached', () => {
-    Challenge.findOne$ =
-      Observable.fromNodeCallback(Challenge.findOne, Challenge);
-    Challenge.findById$ =
-      Observable.fromNodeCallback(Challenge.findById, Challenge);
-    Challenge.find$ =
-      Observable.fromNodeCallback(Challenge.find, Challenge);
+    Challenge.findOne$ = Observable.fromNodeCallback(
+      Challenge.findOne,
+      Challenge
+    );
+    Challenge.findById$ = Observable.fromNodeCallback(
+      Challenge.findById,
+      Challenge
+    );
+    Challenge.find$ = Observable.fromNodeCallback(Challenge.find, Challenge);
+
+    Challenge.find({ isPrivate: false }, (err, challenges) => {
+      if (err) {
+        throw Error(err);
+      }
+      challengeIdToNameMap = challenges.reduce((map, challenge) => {
+        const { id, title } = challenge;
+        map[id] = title;
+        return map;
+      }, {});
+    });
+
+    function getIdToNameMap(cb) {
+      if (isEmpty(challengeIdToNameMap)) {
+        // We are waiting for the find query to resolve
+        return setTimeout(() => getIdToNameMap(cb), 50);
+      }
+      return cb(null, challengeIdToNameMap);
+    }
+    Challenge.getIdToNameMap = getIdToNameMap;
+  });
+
+  Challenge.remoteMethod('getIdToNameMap', {
+    returns: [
+      {
+        arg: 'user',
+        type: 'object',
+        root: true
+      }
+    ],
+    http: {
+      path: '/get-id-to-name',
+      verb: 'GET'
+    }
   });
 }