Clean up code

src/client/ui/templates/messages/messages.js

@@ -227,7 +227,7 @@ define([
 		onKeyDown: function (key) {
 			if (key === 'enter') {
 				this.toggle(true);
-				this.find('input').val(this.lastChannel);
+				this.find('input').val(this.lastChannel || '');
 			}
 			else if (key === 'shift')
 				this.showItemTooltip();
@@ -383,20 +383,13 @@ define([
 			if (val.trim() === '')
 				return;
 
-			switch (val.charAt(0)) {
-				case '@':
-				case '$':
-					this.lastChannel = val.substr(0, val.indexOf(' ')) + ' ';
-					break;
-				
-				case '%':
-					this.lastChannel = '%';
-					break;
-			
-				default:
-					this.lastChannel = null;
-					break;
-			}
+			const firstChar = val[0];
+			this.lastChannel = ({
+				[firstChar]: null,
+				'@': val.substr(0, val.indexOf(' ')) + ' ',
+				'$': val.substr(0, val.indexOf(' ')) + ' ',
+				'%': '%'        
+			})[firstChar];
 
 			client.request({
 				cpn: 'social',