dotfiles/system/nixos/mastodon.nix

{ pkgs, config, ... }:

let
  web-domain = "mastodon.kempkens.io";
in
{
  services.mastodon = {
    enable = true;

    package = pkgs.pkgs-master.mastodon;

    configureNginx = false;

    localDomain = "kempkens.io";

    streamingPort = 55000;
    webPort = 55001;
    sidekiqPort = 55002;
    enableUnixSocket = true;

    sidekiqThreads = 12;

    trustedProxy = "127.0.0.1";

    vapidPublicKeyFile = config.age.secrets.mastodon-vapid-public-key.path;
    secretKeyBaseFile = config.age.secrets.mastodon-secret-key-base.path;
    otpSecretFile = config.age.secrets.mastodon-otp-secret.path;
    vapidPrivateKeyFile = config.age.secrets.mastodon-vapid-private-key.path;

    database = {
      createLocally = true;
    };

    redis = {
      createLocally = true;
    };

    elasticsearch = {
      host = "127.0.0.1";
      port = 9200;
    };

    smtp = {
      createLocally = false;
      authenticate = true;
      host = "smtp.mailgun.org";
      port = 587;
      fromAddress = "mastodon@mg.kempkens.io";
      user = "postmaster@mg.kempkens.io";
      passwordFile = config.age.secrets.mastodon-smtp-password.path;
    };

    automaticMigrations = true;

    mediaAutoRemove = {
      enable = true;
      startAt = "daily";
      olderThanDays = 14;
    };

    extraConfig = {
      WEB_DOMAIN = web-domain;
    };

    extraEnvFiles = [ config.age.secrets.mastodon-extra-config.path ];
  };

  # For services that connect to Mastodon 
  systemd.services.mastodon-wait-for-available = {
    description = "Wait for Mastodon to be available";
    after = [ "mastodon-web.service" ];
    wantedBy = [ "multi-user.target" ];

    serviceConfig = {
      Type = "oneshot";
      ExecStart = "${pkgs.bash}/bin/bash -c 'until ${pkgs.curl}/bin/curl --fail --silent https://${web-domain} > /dev/null; do sleep 1; done'";
    };
  };

  services.nginx.virtualHosts."${web-domain}" = {
    quic = true;
    http3 = true;

    root = "${config.services.mastodon.package}/public/";
    forceSSL = true;
    useACMEHost = "kempkens.io";

    extraConfig = ''
      add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
    '';

    locations."/system/" = {
      extraConfig = ''
        rewrite ^/system/?(.*)$ https://mastodon-cdn.kempkens.io/$1 permanent;
      '';
    };

    locations."/" = {
      tryFiles = "$uri @proxy";
    };

    locations."@proxy" = {
      recommendedProxySettings = true;
      proxyPass = "http://unix:/run/mastodon-web/web.socket";
      proxyWebsockets = true;

      extraConfig = ''
        proxy_hide_header Strict-Transport-Security;
        proxy_force_ranges on;
      '';
    };

    locations."/api/v1/streaming/" = {
      recommendedProxySettings = true;
      proxyPass = "http://unix:/run/mastodon-streaming/streaming.socket";
      proxyWebsockets = true;

      extraConfig = ''
        proxy_hide_header Strict-Transport-Security;
        proxy_force_ranges on;
      '';
    };
  };

  services.nginx.virtualHosts."mastodon-cdn.kempkens.io" =
    let
      lib-base = "/var/lib/mastodon/public-system";
    in
    {
      quic = true;
      http3 = true;
      kTLS = true;

      root = "${config.services.mastodon.package}/public/";
      forceSSL = true;
      useACMEHost = "kempkens.io";

      extraConfig = ''
        add_header Access-Control-Allow-Origin https://mastodon.kempkens.io;
        add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
      '';

      locations."/system/" = {
        alias = "${lib-base}/";

        extraConfig = ''
          add_header Cache-Control "public, max-age=2419200, immutable";
          add_header X-Content-Type-Options nosniff;
          add_header Content-Security-Policy "default-src 'none'; form-action 'none'";
        '';
      };

      # "Old" CDN paths
      locations."/accounts/".alias = "${lib-base}/accounts/";
      locations."/cache/".alias = "${lib-base}/cache/";
      locations."/custom_emojis/".alias = "${lib-base}/custom_emojis/";
      locations."/media_attachments/".alias = "${lib-base}/media_attachments/";
    };

  users.groups.mastodon.members = [ config.services.nginx.user ];
}