nixos/prosody: add muc_notifications module support (#434574)

nixos/modules/services/networking/prosody.nix

@@ -8,6 +8,13 @@
 with lib;
 let
   cfg = config.services.prosody;
+  communityModulesToEnable =
+    let
+      componentSpecificModules = [ "muc_notifications" ];
+    in
+    lib.concatMap (
+      mod: lib.optional (!(lib.elem mod componentSpecificModules)) "${toLua mod};"
+    ) cfg.package.communityModules;
 
   sslOpts = _: {
     options = {
@@ -546,7 +553,7 @@ let
         ${lib.concatStringsSep "\n  " (
           lib.mapAttrsToList (name: val: optionalString val "${toLua name};") cfg.modules
         )}
-        ${lib.concatStringsSep "\n" (map (x: "${toLua x};") cfg.package.communityModules)}
+        ${lib.concatStringsSep "\n" communityModulesToEnable}
         ${lib.concatStringsSep "\n" (map (x: "${toLua x};") cfg.extraModules)}
       };
 
@@ -577,7 +584,7 @@ let
 
       ${lib.concatMapStrings (muc: ''
         Component ${toLua muc.domain} "muc"
-            modules_enabled = {${optionalString cfg.modules.mam ''"muc_mam",''}${optionalString muc.allowners_muc ''"muc_allowners",''}${optionalString muc.moderation ''"muc_moderation",''} }
+            modules_enabled = {${optionalString cfg.modules.mam ''"muc_mam",''}${optionalString muc.allowners_muc ''"muc_allowners",''}${optionalString muc.moderation ''"muc_moderation",''}${optionalString (lib.elem "muc_notifications" cfg.package.communityModules) ''"muc_notifications",''} }
             name = ${toLua muc.name}
             restrict_room_creation = ${toLua muc.restrictRoomCreation}
             max_history_messages = ${toLua muc.maxHistoryMessages}