Server now matches usernames case insensitively like client

- Preserves original capitalization in mention text
- Fixes profile links not working with wrong case mentions

test/api/unit/libs/highlightMentions.test.js

@@ -47,6 +47,12 @@ describe('highlightMentions', () => {
     expect(result[0]).to.equal('[@user-dash](/profile/444): message [@user_underscore](/profile/555)');
   });
 
+  it('highlights users with case-insensitive matching', async () => {
+    const text = '@USER: message @User2 @USER3';
+    const result = await highlightMentions(text);
+    expect(result[0]).to.equal('[@USER](/profile/111): message [@User2](/profile/222) [@USER3](/profile/333)');
+  });
+
   it('doesn\'t highlight nonexisting users', async () => {
     const text = '@nouser message';
     const result = await highlightMentions(text);

test/api/v3/integration/chat/POST-chat.test.js

@@ -238,6 +238,18 @@ describe('POST /chat', () => {
     expect(groupMessages[0].id).to.exist;
   });
 
+  it('creates a chat with case-insensitive mentions', async () => {
+    const originalUsername = member.auth.local.username;
+    const uppercaseUsername = originalUsername.toUpperCase();
+    const messageWithMentions = `hi @${uppercaseUsername}`;
+    const newMessage = await user.post(`/groups/${groupWithChat._id}/chat`, { message: messageWithMentions });
+    const groupMessages = await user.get(`/groups/${groupWithChat._id}/chat`);
+
+    expect(newMessage.message.id).to.exist;
+    expect(newMessage.message.text).to.include(`[@${uppercaseUsername}](/profile/${member._id})`);
+    expect(groupMessages[0].id).to.exist;
+  });
+
   it('creates a chat with a max length of 3000 chars', async () => {
     const veryLongMessage = `
     123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789 123456789.

website/server/libs/highlightMentions.js

@@ -164,18 +164,26 @@ export default async function highlightMentions (text) {
 
   if (mentions && mentions.length <= 5) {
     const usernames = mentions.map(mention => mention.substr(1));
+    const usernameRegexes = usernames.map(username => new RegExp(`^${escapeRegExp(username)}$`, 'i'));
     members = await User
-      .find({ 'auth.local.username': { $in: usernames }, 'flags.verifiedUsername': true })
+      .find({
+        $or: usernameRegexes.map(regex => ({ 'auth.local.username': regex })),
+        'flags.verifiedUsername': true
+      })
       .select(['auth.local.username', '_id', 'preferences.pushNotifications', 'pushDevices', 'party', 'guilds'])
       .lean()
       .exec();
     const baseUrl = determineBaseUrl();
     members.forEach(member => {
       const { username } = member.auth.local;
-      const regex = new RegExp(`@${username}(?![\\-\\w])`, 'g');
-      const replacement = `[@${username}](${baseUrl}/profile/${member._id})`;
+      const regex = new RegExp(`@${escapeRegExp(username)}(?![\\-\\w])`, 'gi');
 
-      textBlocks.transformValidBlocks(blockText => blockText.replace(regex, replacement));
+      textBlocks.transformValidBlocks(blockText =>
+        blockText.replace(regex, match => {
+          const mentionedUsername = match.substr(1);
+          return `[@${mentionedUsername}](${baseUrl}/profile/${member._id})`;
+        })
+      );
     });
   }