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

shared/lib/types.ts

@@ -97,6 +97,7 @@ interface ChannelConfigurationOptions {
     quotes: ChannelQuotes[]
     commands: ChannelCommands[]
     forbidSpecialChars: ChannelForbidSpecialChars
+    noDuplicate: ChannelNoDuplicate
     // TODO: bannedJIDs: string[]
   }
   slowMode: {
@@ -140,6 +141,13 @@ interface ChannelForbidSpecialChars {
   applyToModerators: boolean
 }
 
+interface ChannelNoDuplicate {
+  enabled: boolean
+  reason: string
+  delay: number
+  applyToModerators: boolean
+}
+
 interface ChannelConfiguration {
   channel: ChannelInfos
   configuration: ChannelConfigurationOptions