[#1314][#1489] Add static methods to user model

- Add new static methods to user model
  - `findByEmailAndUsername`
  - renames `findByMailOrName` to `findByEmailOrUsername`
  - `findByUsername`
  - `findByEmail`
- Reverts case insensitive behavior for username

server/config/passport.js

@@ -24,7 +24,7 @@ passport.deserializeUser((id, done) => {
  * Sign in using Email/Username and Password.
  */
 passport.use(new LocalStrategy({ usernameField: 'email' }, (email, password, done) => {
-  User.findByMailOrName(email)
+  User.findByEmailOrUsername(email)
     .then((user) => { // eslint-disable-line consistent-return
       if (!user) {
         return done(null, false, { msg: `Email ${email} not found.` });
@@ -43,7 +43,7 @@ passport.use(new LocalStrategy({ usernameField: 'email' }, (email, password, don
  * Authentificate using Basic Auth (Username + Api Key)
  */
 passport.use(new BasicStrategy((userid, key, done) => {
-  User.findOne({ username: userid }).collation({ locale: 'en', strength: 2 }).exec((err, user) => { // eslint-disable-line consistent-return
+  User.findByUsername(userid, (err, user) => { // eslint-disable-line consistent-return
     if (err) { return done(err); }
     if (!user) { return done(null, false); }
     user.findMatchingKey(key, (innerErr, isMatch, keyDocument) => {
@@ -98,9 +98,7 @@ passport.use(new GitHubStrategy({
     const emails = getVerifiedEmails(profile.emails);
     const primaryEmail = getPrimaryEmail(profile.emails);
 
-    User.findOne({
-      email: { $in: emails },
-    }).collation({ locale: 'en', strength: 2 }).exec((findByEmailErr, existingEmailUser) => {
+    User.findByEmail(emails, (findByEmailErr, existingEmailUser) => {
       if (existingEmailUser) {
         existingEmailUser.email = existingEmailUser.email || primaryEmail;
         existingEmailUser.github = profile.id;
@@ -141,12 +139,9 @@ passport.use(new GoogleStrategy({
 
     const primaryEmail = profile._json.emails[0].value;
 
-    User.findOne({
-      email: primaryEmail,
-    }).collation({ locale: 'en', strength: 2 }).exec((findByEmailErr, existingEmailUser) => {
+    User.findByEmail(primaryEmail, (findByEmailErr, existingEmailUser) => {
       let username = profile._json.emails[0].value.split('@')[0];
-      User.findOne({ username }).collation({ locale: 'en', strength: 2 })
-        .exec((findByUsernameErr, existingUsernameUser) => {
+      User.findByUsername(username, (findByUsernameErr, existingUsernameUser) => {
         if (existingUsernameUser) {
           const adj = friendlyWords.predicates[Math.floor(Math.random() * friendlyWords.predicates.length)];
           username = slugify(`${username} ${adj}`);

server/controllers/collection.controller/collectionForUserExists.js

@@ -11,7 +11,7 @@ export default function collectionForUserExists(username, collectionId, callback
   }
 
   function findUser() {
-    return User.findOne({ username }).collation({ locale: 'en', strength: 2 }).exec();
+    return User.findByUsername(username);
   }
 
   function findCollection(owner) {

server/controllers/collection.controller/listCollections.js

@@ -4,7 +4,7 @@ import User from '../../models/user';
 async function getOwnerUserId(req) {
   if (req.params.username) {
     const user =
-      await User.findOne({ username: req.params.username }).collation({ locale: 'en', strength: 2 }).exec();
+      await User.findByUsername(req.params.username);
     if (user && user._id) {
       return user._id;
     }

server/controllers/project.controller.js

@@ -64,7 +64,7 @@ export function updateProject(req, res) {
 
 export function getProject(req, res) {
   const { project_id: projectId, username } = req.params;
-  User.findOne({ username }).collation({ locale: "en", strength: 2 }).exec((err, user) => { // eslint-disable-line
+  User.findByUsername(username, (err, user) => { // eslint-disable-line
     if (!user) {
       return res.status(404).send({ message: 'Project with that username does not exist' });
     }
@@ -141,7 +141,7 @@ export function projectExists(projectId, callback) {
 }
 
 export function projectForUserExists(username, projectId, callback) {
-  User.findOne({ username }).collation({ locale: 'en', strength: 2 }).exec((err, user) => {
+  User.findByUsername(username, (err, user) => {
     if (!user) {
       callback(false);
       return;

server/controllers/project.controller/getProjectsForUser.js

@@ -7,7 +7,7 @@ const UserNotFoundError = createApplicationErrorClass('UserNotFoundError');
 
 function getProjectsForUserName(username) {
   return new Promise((resolve, reject) => {
-    User.findOne({ username }).collation({ locale: 'en', strength: 2 }).exec((err, user) => {
+    User.findByUsername(username, (err, user) => {
       if (err) {
         reject(err);
         return;

server/controllers/user.controller.js

@@ -30,7 +30,7 @@ const random = (done) => {
 };
 
 export function findUserByUsername(username, cb) {
-  User.findOne({ username }).collation({ locale: 'en', strength: 2 }).exec((err, user) => {
+  User.findByUsername(username, (err, user) => {
     cb(user);
   });
 }
@@ -50,12 +50,7 @@ export function createUser(req, res, next) {
       verifiedTokenExpires: EMAIL_VERIFY_TOKEN_EXPIRY_TIME,
     });
 
-    User.findOne({
-      $or: [
-        { email },
-        { username }
-      ]
-    }).collation({ locale: 'en', strength: 2 }).exec((err, existingUser) => {
+    User.findByEmailAndUsername(email, username, (err, existingUser) => {
       if (err) {
         res.status(404).send({ error: err });
         return;
@@ -100,6 +95,9 @@ export function duplicateUserCheck(req, res) {
   const value = req.query[checkType];
   const query = {};
   query[checkType] = value;
+  // Don't want to use findByEmailOrUsername here, because in this case we do
+  // want to use case-insensitive search for usernames to prevent username
+  // duplicates, which overrides the default behavior.
   User.findOne(query).collation({ locale: 'en', strength: 2 }).exec((err, user) => {
     if (user) {
       return res.json({
@@ -144,8 +142,7 @@ export function resetPasswordInitiate(req, res) {
   async.waterfall([
     random,
     (token, done) => {
-      User.findOne({ email: req.body.email.toLowerCase() })
-        .collation({ locale: 'en', strength: 2 }).exec((err, user) => {
+      User.findByEmail(req.body.email, (err, user) => {
         if (!user) {
           res.json({ success: true, message: 'If the email is registered with the editor, an email has been sent.' });
           return;
@@ -275,7 +272,7 @@ export function updatePassword(req, res) {
 }
 
 export function userExists(username, callback) {
-  User.findOne(username).collation({ locale: 'en', strength: 2 }).exec((err, user) => (
+  User.findByUsername(username, (err, user) => (
     user ? callback(true) : callback(false)
   ));
 }

server/models/user.js

@@ -141,20 +141,81 @@ userSchema.methods.findMatchingKey = function findMatchingKey(candidateKey, cb)
   if (!foundOne) cb('Matching API key not found !', false, null);
 };
 
-userSchema.statics.findByMailOrName = function findByMailOrName(email) {
-  const isEmail = email.indexOf('@') > -1;
-  if (isEmail) {
-    const query = {
-      email: email.toLowerCase()
+/**
+ *
+ * Queries User collection by email and returns one User document.
+ *
+ * @param {string|string[]} email - Email string or array of email strings
+ * @callback [cb] - Optional error-first callback that passes User document
+ * @return {Promise<Object>} - Returns Promise fulfilled by User document
+ */
+userSchema.statics.findByEmail = function findByEmail(email, cb) {
+  let query;
+  if (Array.isArray(email)) {
+    query = {
+      email: { $in: email }
+    };
+  } else {
+    query = {
+      email
     };
-    // once emails are all lowercase, won't need to do collation
-    // but maybe it's not even necessary to make all emails lowercase??
-    return this.findOne(query).collation({ locale: 'en', strength: 2 }).exec();
   }
-  const query = {
-    username: email
+  // Email addresses should be case-insensitive unique
+  // In MongoDB, you must use collation in order to do a case-insensitive query
+  return this.findOne(query).collation({ locale: 'en', strength: 2 }).exec(cb);
 };
-  return this.findOne(query).collation({ locale: 'en', strength: 2 }).exec();
+
+/**
+ *
+ * Queries User collection by username and returns one User document.
+ *
+ * @param {string} username - Username string
+ * @callback [cb] - Optional error-first callback that passes User document
+ * @return {Promise<Object>} - Returns Promise fulfilled by User document
+ */
+userSchema.statics.findByUsername = function findByUsername(username, cb) {
+  const query = {
+    username
+  };
+  return this.findOne(query, cb);
+};
+
+/**
+ *
+ * Queries User collection using email or username with optional callback.
+ * This function will determine automatically whether the data passed is
+ * a username or email.
+ *
+ * @param {string} value - Email or username
+ * @callback [cb] - Optional error-first callback that passes User document
+ * @return {Promise<Object>} - Returns Promise fulfilled by User document
+ */
+userSchema.statics.findByEmailOrUsername = function findByEmailOrUsername(value, cb) {
+  const isEmail = value.indexOf('@') > -1;
+  if (isEmail) {
+    return this.findByEmail(value, cb);
+  }
+  return this.findByUsername(value, cb);
+};
+
+/**
+ *
+ * Queries User collection, performing a MongoDB logical or with the email
+ * and username (i.e. if either one matches, will return the first document).
+ *
+ * @param {string} email
+ * @param {string} username
+ * @callback [cb] - Optional error-first callback that passes User document
+ * @return {Promise<Object>} - Returns Promise fulfilled by User document
+ */
+userSchema.statics.findByEmailAndUsername = function findByEmailAndUsername(email, username, cb) {
+  const query = {
+    $or: [
+      { email },
+      { username }
+    ]
+  };
+  return this.findOne(query).collation({ locale: 'en', strength: 2 }).exec(cb);
 };
 
 userSchema.statics.EmailConfirmation = EmailConfirmationStates;