add endpoint for challenge statistics

config/default.js

@@ -48,6 +48,9 @@ module.exports = {
   // in bytes
   FILE_UPLOAD_SIZE_LIMIT: process.env.FILE_UPLOAD_SIZE_LIMIT
     ? Number(process.env.FILE_UPLOAD_SIZE_LIMIT) : 50 * 1024 * 1024, // 50M
+  // TODO: change this to localhost
+  SUBMISSIONS_API_URL: process.env.SUBMISSIONS_API_URL || 'https://api.topcoder-dev.com/v5/submissions',
+  MEMBERS_API_URL: process.env.MEMBERS_API_URL || 'https://api.topcoder-dev.com/v5/members',
   RESOURCES_API_URL: process.env.RESOURCES_API_URL || 'http://localhost:4000/v5/resources',
   // TODO: change this to localhost
   RESOURCE_ROLES_API_URL: process.env.RESOURCE_ROLES_API_URL || 'http://api.topcoder-dev.com/v5/resource-roles',

src/common/helper.js

@@ -959,6 +959,50 @@ async function getGroupById (groupId) {
   }
 }
 
+/**
+ * Get challenge submissions
+ * @param {String} challengeId the challenge id
+ * @returns {Array} the submission
+ */
+async function getChallengeSubmissions (challengeId) {
+  const token = await getM2MToken()
+  let allSubmissions = []
+  // get search is paginated, we need to get all pages' data
+  let page = 1
+  while (true) {
+    const result = await axios.get(`${config.SUBMISSIONS_API_URL}?challengeId=${challengeId}`, {
+      headers: { Authorization: `Bearer ${token}` },
+      params: {
+        page,
+        perPage: 100
+      }
+    })
+    const ids = result.data || []
+    if (ids.length === 0) {
+      break
+    }
+    allSubmissions = allSubmissions.concat(ids)
+    page += 1
+    if (result.headers['x-total-pages'] && page > Number(result.headers['x-total-pages'])) {
+      break
+    }
+  }
+  return allSubmissions
+}
+
+/**
+ * Get member by ID
+ * @param {String} userId the user ID
+ * @returns {Object}
+ */
+async function getMemberById (userId) {
+  const token = await getM2MToken()
+  const res = await axios.get(`${config.MEMBERS_API_URL}?userId=${userId}`, {
+    headers: { Authorization: `Bearer ${token}` }
+  })
+  return res.data || {}
+}
+
 module.exports = {
   wrapExpress,
   autoWrapExpress,
@@ -1000,5 +1044,7 @@ module.exports = {
   ensureUserCanModifyChallenge,
   userHasFullAccess,
   sumOfPrizes,
-  getGroupById
+  getGroupById,
+  getChallengeSubmissions,
+  getMemberById
 }

src/controllers/ChallengeController.js

@@ -38,6 +38,16 @@ async function getChallenge (req, res) {
   res.send(result)
 }
 
+/**
+ * Get challenge statistics
+ * @param {Object} req the request
+ * @param {Object} res the response
+ */
+async function getChallengeStatistics (req, res) {
+  const result = await service.getChallengeStatistics(req.authUser, req.params.challengeId)
+  res.send(result)
+}
+
 /**
  * Fully update challenge
  * @param {Object} req the request
@@ -77,5 +87,6 @@ module.exports = {
   getChallenge,
   fullyUpdateChallenge,
   partiallyUpdateChallenge,
-  deleteChallenge
+  deleteChallenge,
+  getChallengeStatistics
 }

src/routes.js

@@ -61,6 +61,12 @@ module.exports = {
       scopes: [DELETE, ALL]
     }
   },
+  '/challenges/:challengeId/statistics': {
+    get: {
+      controller: 'ChallengeController',
+      method: 'getChallengeStatistics',
+    }
+  },
   '/challenge-types': {
     get: {
       controller: 'ChallengeTypeController',

src/services/ChallengeService.js

@@ -1209,6 +1209,49 @@ getChallenge.schema = {
   id: Joi.id()
 }
 
+/**
+ * Get challenge statistics
+ * @param {Object} currentUser the user who perform operation
+ * @param {String} id the challenge id
+ * @returns {Object} the challenge with given id
+ */
+async function getChallengeStatistics (currentUser, id) {
+  const challenge = await getChallenge(currentUser, id)
+  // for now, only Data Science challenges are supported
+  if (challenge.type !== 'Challenge' && challenge.track !== 'Data Science') {
+    throw new errors.BadRequestError(`Challenge of type ${challenge.type} and track ${challenge.track} does not support statistics`)
+  }
+  // get submissions
+  const submissions = await helper.getChallengeSubmissions(challenge.id)
+  // for each submission, load member profile
+  const map = {}
+  for (const submission of submissions) {
+    if (!map[submission.memberId]) {
+      // Load member profile and cache
+      const member = await helper.getMemberById(submission.memberId)
+      map[submission.memberId] = {
+        photoUrl: member.photoURL,
+        rating: _.get(member, 'maxRating.rating', 0),
+        ratingColor: _.get(member, 'maxRating.rating', '#9D9FA0'),
+        homeCountryCode: member.homeCountryCode,
+        handle: member.handle,
+        submissions: []
+      }
+    }
+    // add submission
+    map[submission.memberId].submissions.push({
+      created: submission.created,
+      score: _.get(_.find(submission.review || [], r => r.metadata), 'score', 0)
+    })
+  }
+  return _.map(_.keys(map), (userId) => map[userId])
+}
+
+getChallengeStatistics.schema = {
+  currentUser: Joi.any(),
+  id: Joi.id()
+}
+
 /**
  * Check whether given two phases array are different.
  * @param {Array} phases the first phases array
@@ -2078,7 +2121,8 @@ module.exports = {
   getChallenge,
   fullyUpdateChallenge,
   partiallyUpdateChallenge,
-  deleteChallenge
+  deleteChallenge,
+  getChallengeStatistics
 }
 
 logger.buildService(module.exports)