matrix: Add mjolnir as a moderation bot

hosts/jokum/services/matrix/default.nix

@@ -7,6 +7,7 @@
     ./synapse-admin.nix
     ./element.nix
     ./coturn.nix
+    ./mjolnir.nix
 
     ./discord.nix
   ];

hosts/jokum/services/matrix/mjolnir.nix

@@ -0,0 +1,54 @@
+{ config, lib, ... }:
+
+{
+  sops.secrets."matrix/mjolnir/access_token" = {
+    owner = config.users.users.mjolnir.name;
+    group = config.users.users.mjolnir.group;
+  };
+
+  services.mjolnir = {
+    enable = true;
+    pantalaimon.enable = false;
+    homeserverUrl = config.services.matrix-synapse-next.settings.public_baseurl;
+    accessTokenFile = config.sops.secrets."matrix/mjolnir/access_token".path;
+    managementRoom = "!gsdeCoWjvYRBrzuiRq:pvv.ntnu.no";
+    protectedRooms = map (a: "https://matrix.to/#/${a}") [
+      "#pvv:pvv.ntnu.no"
+      "#stand:pvv.ntnu.no"
+      "#music:pvv.ntnu.no"
+      "#arts-and-crafts:pvv.ntnu.no"
+      "#programming:pvv.ntnu.no"
+      "#talks-and-texts:pvv.ntnu.no"
+      "#job-offers:pvv.ntnu.no"
+      "#vaffling:pvv.ntnu.no"
+      "#pvv-fadder:pvv.ntnu.no"
+      "#offsite:pvv.ntnu.no"
+      "#help:pvv.ntnu.no"
+      "#garniske-algoritmer:pvv.ntnu.no"
+      "#bouldering:pvv.ntnu.no"
+      "#filmclub:pvv.ntnu.no"
+      "#video-games:pvv.ntnu.no"
+      "#board-games:pvv.ntnu.no"
+      "#tabletop-rpgs:pvv.ntnu.no"
+      "#anime:pvv.ntnu.no"
+      "#general:pvv.ntnu.no"
+      "#announcements:pvv.ntnu.no"
+      "#memes:pvv.ntnu.no"
+
+      "#drift:pvv.ntnu.no"
+      "#notifikasjoner:pvv.ntnu.no"
+      "#forespoersler:pvv.ntnu.no"
+      "#krisekanalen:pvv.ntnu.no"
+
+      "#styret:pvv.ntnu.no"
+    ];
+
+    settings = {
+      admin.enableMakeRoomAdminCommand = true;
+    };
+
+    # Module wants it even when not using pantalaimon
+    # TODO: Fix upstream module in nixpkgs
+    pantalaimon.username = "bot_admin";
+  };
+}