closes #6163

public/language/en-GB/admin/settings/chat.json

@@ -5,5 +5,7 @@
 	"disable-editing-help": "Administrators and global moderators are exempt from this restriction",
 	"max-length": "Maximum length of chat messages",
 	"max-room-size": "Maximum number of users in chat rooms",
-	"delay": "Time between chat messages in milliseconds"
+	"delay": "Time between chat messages in milliseconds",
+	"restrictions.seconds-edit-after": "Number of seconds before users are allowed to edit chat messages after posting. (0 disabled)",
+	"restrictions.seconds-delete-after": "Number of seconds before users are allowed to delete chat messages after posting. (0 disabled)"
 }

public/language/en-GB/error.json

@@ -137,6 +137,8 @@
 	"cant-edit-chat-message": "You are not allowed to edit this message",
 	"cant-remove-last-user": "You can't remove the last user",
 	"cant-delete-chat-message": "You are not allowed to delete this message",
+	"chat-edit-duration-expired": "You are only allowed to edit chat messages for %1 second(s) after posting",
+	"chat-delete-duration-expired": "You are only allowed to delete chat messages for %1 second(s) after posting",
 
 	"already-voting-for-this-post": "You have already voted for this post.",
 	"reputation-system-disabled": "Reputation system is disabled.",

src/messaging/edit.js

@@ -44,10 +44,25 @@ module.exports = function (Messaging) {
 	};
 
 	Messaging.canEdit = function (messageId, uid, callback) {
+		canEditDelete(messageId, uid, 'edit', callback);
+	};
+
+	Messaging.canDelete = function (messageId, uid, callback) {
+		canEditDelete(messageId, uid, 'delete', callback);
+	};
+
+	function canEditDelete(messageId, uid, type, callback) {
+		var durationConfig = '';
+		if (type === 'edit') {
+			durationConfig = 'chatEditDuration';
+		} else if (type === 'delete') {
+			durationConfig = 'chatDeleteDuration';
+		}
+
 		if (parseInt(meta.config.disableChat, 10) === 1) {
-			return callback(null, false);
+			return callback(new Error('[[error:chat-disabled]]'));
 		} else if (parseInt(meta.config.disableChatMessageEditing, 10) === 1) {
-			return callback(null, false);
+			return callback(new Error('[[error:chat-message-editing-disabled]]'));
 		}
 
 		async.waterfall([
@@ -56,25 +71,36 @@ module.exports = function (Messaging) {
 			},
 			function (userData, next) {
 				if (parseInt(userData.banned, 10) === 1) {
-					return callback(null, false);
+					return callback(new Error('[[error:user-banned]]'));
 				}
 
 				if (parseInt(meta.config.requireEmailConfirmation, 10) === 1 && parseInt(userData['email:confirmed'], 10) !== 1) {
-					return callback(null, false);
+					return callback(new Error('[[error:email-not-confirmed]]'));
 				}
-
-				Messaging.getMessageField(messageId, 'fromuid', next);
-			},
-			function (fromUid, next) {
-				if (parseInt(fromUid, 10) === parseInt(uid, 10)) {
-					return callback(null, true);
-				}
-
+				async.parallel({
+					isAdmin: function (next) {
 						user.isAdministrator(uid, next);
 					},
-			function (isAdmin, next) {
-				next(null, isAdmin);
+					messageData: function (next) {
+						Messaging.getMessageFields(messageId, ['fromuid', 'timestamp'], next);
+					},
+				}, next);
+			},
+			function (results, next) {
+				if (results.isAdmin) {
+					return callback();
+				}
+				var chatConfigDuration = parseInt(meta.config[durationConfig], 10);
+				if (chatConfigDuration && Date.now() - parseInt(results.messageData.timestamp, 10) > chatConfigDuration * 1000) {
+					return callback(new Error('[[error:chat-' + type + '-duration-expired, ' + meta.config[durationConfig] + ']]'));
+				}
+
+				if (parseInt(results.messageData.fromuid, 10) === parseInt(uid, 10)) {
+					return callback();
+				}
+
+				next(new Error('[[error:cant-' + type + '-chat-message]]'));
 			},
 		], callback);
-	};
+	}
 };

src/socket.io/modules.js

@@ -246,10 +246,7 @@ SocketModules.chats.edit = function (socket, data, callback) {
 		function (next) {
 			Messaging.canEdit(data.mid, socket.uid, next);
 		},
-		function (allowed, next) {
-			if (!allowed) {
-				return next(new Error('[[error:cant-edit-chat-message]]'));
-			}
+		function (next) {
 			Messaging.editMessage(socket.uid, data.mid, data.roomId, data.message, next);
 		},
 	], callback);
@@ -262,13 +259,9 @@ SocketModules.chats.delete = function (socket, data, callback) {
 
 	async.waterfall([
 		function (next) {
-			Messaging.canEdit(data.messageId, socket.uid, next);
+			Messaging.canDelete(data.messageId, socket.uid, next);
 		},
-		function (allowed, next) {
-			if (!allowed) {
-				return next(new Error('[[error:cant-delete-chat-message]]'));
-			}
-
+		function (next) {
 			Messaging.deleteMessage(data.messageId, data.roomId, next);
 		},
 	], callback);

src/views/admin/settings/chat.tpl

@@ -23,6 +23,16 @@
 			<p class="help-block">[[admin/settings/chat:disable-editing-help]]</p>
 		</div>
 
+		<div class="form-group">
+			<label>[[admin/settings/chat:restrictions.seconds-edit-after]]</label>
+			<input type="text" class="form-control" value="0" data-field="chatEditDuration">
+		</div>
+
+		<div class="form-group">
+			<label>[[admin/settings/chat:restrictions.seconds-delete-after]]</label>
+			<input type="text" class="form-control" value="0" data-field="chatDeleteDuration">
+		</div>
+
 		<div class="form-group">
 			<label>[[admin/settings/chat:max-length]]</label>
 			<input type="text" class="form-control" value="1000" data-field="maximumChatMessageLength">