[FIX] Mention from suggestions concatenates to query string on autocomplete (#3696)

* [FIX] Mention suggestion concatenate to query string

* Add function to get regexp and its tests in separate files

* Update getRegexp.ts

* Update file names

* Try new regex

* One regex for all mention types

Co-authored-by: Gleidson Daniel Silva <gleidson10daniel@hotmail.com>

app/containers/MessageBox/getMentionRegexp.test.js

@@ -0,0 +1,56 @@
+import getMentionRegexp from './getMentionRegexp';
+
+const regexp = getMentionRegexp();
+
+describe('getMentionRegexpUser', function () {
+	test('removing query text on user suggestion autocomplete (latin)', () => {
+		const message = 'Hey @test123';
+		expect(message.replace(regexp, '')).toBe('Hey @');
+	});
+
+	test('removing query text on user suggestion autocomplete (arabic)', () => {
+		const message = 'Hey @اختبار123';
+		expect(message.replace(regexp, '')).toBe('Hey @');
+	});
+
+	test('removing query text on user suggestion autocomplete (russian)', () => {
+		const message = 'Hey @тест123';
+		expect(message.replace(regexp, '')).toBe('Hey @');
+	});
+
+	test('removing query text on user suggestion autocomplete (chinese trad)', () => {
+		const message = 'Hey @測試123';
+		expect(message.replace(regexp, '')).toBe('Hey @');
+	});
+
+	test('removing query text on user suggestion autocomplete (japanese)', () => {
+		const message = 'Hey @テスト123';
+		expect(message.replace(regexp, '')).toBe('Hey @');
+	});
+
+	test('removing query text on user suggestion autocomplete (special characters in query)', () => {
+		const message = "Hey @'=test123";
+		expect(message.replace(regexp, '')).toBe('Hey @');
+	});
+});
+
+describe('getMentionRegexpEmoji', function () {
+	test('removing query text on emoji suggestion autocomplete ', () => {
+		const message = 'Hey :smiley';
+		expect(message.replace(regexp, '')).toBe('Hey :');
+	});
+});
+
+describe('getMentionRegexpCommand', function () {
+	test('removing query text on emoji suggestion autocomplete ', () => {
+		const message = '/archive';
+		expect(message.replace(regexp, '')).toBe('/');
+	});
+});
+
+describe('getMentionRegexpRoom', function () {
+	test('removing query text on emoji suggestion autocomplete ', () => {
+		const message = 'Check #general';
+		expect(message.replace(regexp, '')).toBe('Check #');
+	});
+});

app/containers/MessageBox/getMentionRegexp.ts

@@ -0,0 +1,4 @@
+// Match query string from the message to replace it with the suggestion
+const getMentionRegexp = (): any => /[^@:#/!]*$/;
+
+export default getMentionRegexp;

app/containers/MessageBox/index.tsx

@@ -31,6 +31,7 @@ import { isAndroid, isTablet } from '../../utils/deviceInfo';
 import { canUploadFile } from '../../utils/media';
 import EventEmiter from '../../utils/events';
 import { KEY_COMMAND, handleCommandShowUpload, handleCommandSubmit, handleCommandTyping } from '../../commands';
+import getMentionRegexp from './getMentionRegexp';
 import Mentions from './Mentions';
 import MessageboxContext from './Context';
 import {
@@ -489,7 +490,7 @@ class MessageBox extends Component<IMessageBoxProps, IMessageBoxState> {
 		const msg = this.text;
 		const { start, end } = this.selection;
 		const cursor = Math.max(start, end);
-		const regexp = /([a-z0-9._-]+)$/im;
+		const regexp = getMentionRegexp();
 		let result = msg.substr(0, cursor).replace(regexp, '');
 		// Remove the ! after select the canned response
 		if (trackingType === MENTIONS_TRACKING_TYPE_CANNED) {