nixos/hosts/architect/matrix.nix

{ pkgs, ... }:

let
  domain = "matrix.giugl.io";
  webui_domain = "chat.giugl.io";
  network = import ./network.nix;
in {
  services = {
    matrix-synapse = {
      enable = true;
      server_name = "${domain}";
      database_name = "synapse";
      public_baseurl = "https://${domain}";
      registration_shared_secret = "runas!";
      dynamic_thumbnails = true;
      #      enable_registration = true;
      app_service_config_files = [
        "/var/lib/matrix-synapse/discord-registration.yaml"
        "/var/lib/matrix-synapse/telegram-registration.yaml"
      ];
      extraConfig = ''
        auto_join_rooms:
          - "#infra:matrix.giugl.io"
          - "#general:matrix.giugl.io"
          - "#movies:matrix.giugl.io"
        max_upload_size: "30M"
      '';
      listeners = [{
        port = 8008;
        bind_address = "::1";
        type = "http";
        tls = false;
        x_forwarded = true;
        resources = [{
          names = [ "client" "federation" ];
          compress = false;
        }];
      }];
      turn_uris = [
        "turns:turn.giugl.io:5349?transport=udp"
        "turns:turn.giugl.io:5349?transport=tcp"
      ];
      turn_shared_secret = "69duck duck fuck420";
      turn_user_lifetime = "1h";
    };

    postgresql = {
      enable = true;
      package = pkgs.postgresql_11;
      ensureDatabases = [ "synapse" ];
      ensureUsers = [{
        name = "matrix-synapse";
        ensurePermissions = { "DATABASE synapse" = "ALL PRIVILEGES"; };
      }];
    };

    nginx.virtualHosts = {
      # server
      ${domain} = {
        enableACME = true;
        forceSSL = true;
        extraConfig = ''
          client_max_body_size  30m;
        '';
        locations."= /.well-known/matrix/server".extraConfig =
          let server = { "m.server" = "${domain}:443"; };
          in ''
            add_header Content-Type application/json;
            return 200 '${builtins.toJSON server}';
          '';

        locations."= /.well-known/matrix/client".extraConfig = let
          client = {
            "m.homeserver" = { "base_url" = "https://${domain}:443"; };
            "m.identity_server" = { "base_url" = "https://vector.im"; };
          };
          # ACAO required to allow element-web on any URL to request this json file
        in ''
          add_header Content-Type application/json;
          add_header Access-Control-Allow-Origin *;
          return 200 '${builtins.toJSON client}';
        '';

        locations."/".extraConfig = ''
          return 404;
        '';

        # forward all Matrix API calls to the synapse Matrix homeserver
        locations."/_matrix" = {
          proxyPass = "http://[::1]:8008"; # without a trailing /
        };
      };

      # web client

      "${webui_domain}" = {
        enableACME = true;
        forceSSL = true;

        root = pkgs.element-web.override {
          conf = {
            default_server_config."m.homeserver" = {
              "base_url" = "https://${domain}";
              "server_name" = "${domain}";
            };
          };
        };
      };
    };

    # discord bridge
    matrix-appservice-discord = {
      enable = true;
      environmentFile = /secrets/matrix-appservice-discord/tokens.env;
      # The appservice is pre-configured to use SQLite by default.
      # It's also possible to use PostgreSQL.
      settings = {
        bridge = {
          domain = domain;
          homeserverUrl = "https://${domain}";
          disablePresence = true;
        };
      };
    };

    # telegram bridge

    mautrix-telegram = {
      enable = true;
      environmentFile = /secrets/mautrix-telegram/mautrix-telegram.env;

      settings = {
        homeserver = {
          address = "https://${domain}";
          domain = "${domain}";
        };

        appservice = {
          provisioning.enabled = false;
          id = "telegram";
        };

        bridge = {
          permissions = {
            "@pepe:${domain}" = "admin";
            "${domain}" = "puppeting";
          };

          # Animated stickers conversion requires additional packages in the
          # service's path.
          # If this isn't a fresh installation, clearing the bridge's uploaded
          # file cache might be necessary (make a database backup first!):
          # delete from telegram_file where \
          #   mime_type in ('application/gzip', 'application/octet-stream')
          animated_sticker = {
            target = "gif";
            args = {
              width = 256;
              height = 256;
              fps = 30; # only for webm
              background = "020202"; # only for gif, transparency not supported
            };
          };

          encryption = {
            allow = true;
            default = true;
          };
        };
      };
    };

  };

  systemd.services.mautrix-telegram.path = with pkgs; [
    lottieconverter # for animated stickers conversion, unfree package
    ffmpeg # if converting animated stickers to webm (very slow!)
  ];

  networking.extraHosts = ''
    ${network.architect-lan} ${domain} ${webui_domain}
    ${network.architect-wg} ${domain} ${webui_domain}
  '';

}