Automatically clear command history

README.md

@@ -53,4 +53,10 @@ Available commands:
 	/clear					         Clear on-screen buffer                      
 	/mute					         Toggle notification sounds                  
 	/help					         This                                        
+
+  You can select any of the five last commands/messages with up/down key.
+
+  Due to security reasons, /key command is not saved, and command 
+  history is  automatically cleared after one minute of inactivity.
+
 ```

public/js/cryptalk_modules/cryptalk.js

@@ -16,6 +16,7 @@ define('cryptalk', {
 		history = [],
 		history_pos = -1,
 		history_keep = 4,
+		history_timer,
 
 		// Collection of DOM components
 		components = {
@@ -54,7 +55,7 @@ define('cryptalk', {
 				components.chat.html('');
 				
 				// Clear command history on clearing buffer
-				history = []; history_pos = -1;
+				clearHistory();
 			},
 
 			leave: function () {
@@ -129,7 +130,7 @@ define('cryptalk', {
 			}
 		},
 
-		// Push input buffer to command history
+		// Push input buffer to history
 		pushHistory = function (b) {
 			history.push(b); 
 
@@ -137,6 +138,12 @@ define('cryptalk', {
 			if( history.length > history_keep ) history.shift();
 		},
 
+		// Clear input buffer history
+		clearHistory = function() {
+			history = [];
+			history_pos = -1;
+		},
+					
 		// Handler for the document`s keyDown-event.
 		onKeyDown = function (e) {
 			var buffer,
@@ -151,6 +158,10 @@ define('cryptalk', {
 				return components.input.focus();
 			}
 
+			// Reset command history clear timer
+			clearTimeout(history_timer);
+			history_timer = setTimeout(function(){clearHistory()}, 60000);
+
 			// Check for escape key, this does nothing but clear the input buffer and reset history position
 			if ( e.keyCode == 27 ) {
 				history_pos = -1;
@@ -252,7 +263,7 @@ define('cryptalk', {
 			post('info', $.template(templates.messages.left_room, { roomName: room }));
 
 			// Clear history on leaving room
-			history = []; history_pos = -1;
+			clearHistory();
 
 			room = false;
 		})

public/js/cryptalk_modules/templates.js

@@ -35,6 +35,11 @@ define({
 		'	/help					This                                        \n' +
 		'                                                                       \n' +
 		'                                                                       \n' +
+		'You can select any of the five last commands/messages with up/down key.\n' +
+		'                                                                       \n' + 
+		'Due to security reasons, /key command is not saved, and command        \n' + 
+  		'history is  automatically cleared after one minute of inactivity.      \n' + 
+		'                                                                       \n' +
 		'<strong>It is highly recommended to use incognito mode while chatting, \n' +
 		'to prevent browsers from keeping history or cache.</strong>            \n' +
 		'                                                                       \n' +