New option for the moderation bot: forbid duplicate messages (#516).

server/lib/configuration/channel/sanitize.ts

@@ -57,7 +57,18 @@ async function sanitizeChannelConfigurationOptions (
     applyToModerators: false
   }
   if (!_assertObjectType(botData.forbidSpecialChars)) {
-    throw new Error('Invalid data.forbidSpecialChars data type')
+    throw new Error('Invalid data.bot.forbidSpecialChars data type')
+  }
+
+  // noDuplicate comes with livechat 11.1.0
+  botData.noDuplicate ??= {
+    enabled: false,
+    reason: '',
+    delay: 60,
+    applyToModerators: false
+  }
+  if (!_assertObjectType(botData.noDuplicate)) {
+    throw new Error('Invalid data.bot.noDuplicate data type')
   }
 
   // terms not present in livechat <= 10.2.0
@@ -76,6 +87,7 @@ async function sanitizeChannelConfigurationOptions (
       nickname: _readSimpleInput(botData, 'nickname', true),
       forbiddenWords: await _readForbiddenWords(botData),
       forbidSpecialChars: await _readForbidSpecialChars(botData),
+      noDuplicate: await _readNoDuplicate(botData),
       quotes: _readQuotes(botData),
       commands: _readCommands(botData)
       // TODO: bannedJIDs
@@ -266,6 +278,21 @@ async function _readForbidSpecialChars (
   return result
 }
 
+async function _readNoDuplicate (
+  botData: Record<string, unknown>
+): Promise<ChannelConfigurationOptions['bot']['noDuplicate']> {
+  if (!_assertObjectType(botData.noDuplicate)) {
+    throw new Error('Invalid forbidSpecialChars data')
+  }
+  const result: ChannelConfigurationOptions['bot']['noDuplicate'] = {
+    enabled: _readBoolean(botData.noDuplicate, 'enabled'),
+    reason: _readSimpleInput(botData.noDuplicate, 'reason'),
+    delay: _readInteger(botData.noDuplicate, 'delay', 0, 24 * 3600),
+    applyToModerators: _readBoolean(botData.noDuplicate, 'applyToModerators')
+  }
+  return result
+}
+
 function _readQuotes (botData: Record<string, unknown>): ChannelConfigurationOptions['bot']['quotes'] {
   if (!Array.isArray(botData.quotes)) {
     throw new Error('Invalid quotes data')

server/lib/configuration/channel/storage.ts

@@ -50,6 +50,12 @@ function getDefaultChannelConfigurationOptions (_options: RegisterServerOptions)
         tolerance: 0,
         applyToModerators: false
       },
+      noDuplicate: {
+        enabled: false,
+        reason: '',
+        delay: 60,
+        applyToModerators: false
+      },
       quotes: [],
       commands: []
     },
@@ -124,6 +130,11 @@ function channelConfigurationOptionsToBotRoomConf (
     handlersIds.set(id, true)
     handlers.push(_getForbidSpecialCharsHandler(id, channelConfigurationOptions.bot.forbidSpecialChars))
   }
+  if (channelConfigurationOptions.bot.noDuplicate.enabled) {
+    const id = 'no_duplicate'
+    handlersIds.set(id, true)
+    handlers.push(_getNoDuplicateHandler(id, channelConfigurationOptions.bot.noDuplicate))
+  }
   channelConfigurationOptions.bot.quotes.forEach((v, i) => {
     const id = 'quote_' + i.toString()
     handlersIds.set(id, true)
@@ -254,6 +265,23 @@ function _getForbidSpecialCharsHandler (
   return handler
 }
 
+function _getNoDuplicateHandler (
+  id: string,
+  noDuplicate: ChannelConfigurationOptions['bot']['noDuplicate']
+): ConfigHandler {
+  const handler: ConfigHandler = {
+    type: 'no-duplicate',
+    id,
+    enabled: true,
+    options: {
+      reason: noDuplicate.reason,
+      delay: noDuplicate.delay,
+      applyToModerators: !!noDuplicate.applyToModerators
+    }
+  }
+  return handler
+}
+
 function _getQuotesHandler (
   id: string,
   quotes: ChannelConfigurationOptions['bot']['quotes'][0]