vps/nix/apps/hugo-chat/default.nix

{ config, lib, pkgs, ... }:
let
  jarfile = pkgs.fetchurl {
    url =
      "https://github.com/C0RR1T/HugoChat/releases/download/2024-08-05/HugoServer.jar";
    hash = "sha256-hCe2UPqrSR6u3/UxsURI2KzRxN5saeTteCRq5Zfay4M=";
  };
  hugo-chat-client = pkgs.fetchzip {
    url =
      "https://github.com/C0RR1T/HugoChat/releases/download/2024-08-05/hugo-client.tar.xz";
    sha256 = "sha256:121ai8q6bm7gp0pl1ajfk0k2nrfg05zid61i20z0j5gpb2qyhsib";
    stripRoot = false;
  };
in
{
  age.secrets.hugochat_db_password.file = ../../secrets/hugochat_db_password.age;

  systemd.services.hugo-chat-server = {
    description = "HugoChat server, a chat platform";
    wantedBy = [ "multi-user.target" ];
    after = [ "network.target" ];
    environment = {
      SPRING_DATASOURCE_URL = "jdbc:postgresql://localhost:5003/postgres";
    };
    serviceConfig = {
      DynamicUser = true;
      ExecStart = "${lib.getExe' pkgs.jdk21 "java"} -jar ${jarfile} --server.port=5001";
      EnvironmentFile = [ config.age.secrets.hugochat_db_password.path ];
    };
  };

  virtualisation.oci-containers.containers = {
    hugo-chat-db = {
      image = "postgres:16";
      ports = [ "127.0.0.1:5003:5432" ];
      volumes = [ "/var/lib/hugo-chat/data:/var/lib/postgresql/data" ];
      environment = {
        PGDATA = "/var/lib/postgresql/data/pgdata";
      };
      extraOptions = [ "--cgroup-manager=cgroupfs" "--cgroup-parent=/system.slice/podman-hugo-chat-db.service" ];
      environmentFiles = [ config.age.secrets.hugochat_db_password.path ];
    };
  };

  services.caddy.virtualHosts = {
    "hugo-chat.noratrieb.dev" = {
      logFormat = "";
      extraConfig = ''
        encode zstd gzip
        root * ${import ../../packages/caddy-static-prepare {
          name = "hugo-chat-client";
          src = hugo-chat-client;
          inherit pkgs lib;
        }}
        try_files {path} /index.html
        file_server {
          etag_file_extensions .sha256
          precompressed zstd gzip br
        }
      '';
    };
    "api.hugo-chat.noratrieb.dev" =
      let
        cors = pkgs.writeText "cors" ''
          # https://gist.github.com/ryanburnette/d13575c9ced201e73f8169d3a793c1a3
          @cors_preflight{args[0]} method OPTIONS
          @cors{args[0]} header Origin {args[0]}

          handle @cors_preflight{args[0]} {
            header {
              Access-Control-Allow-Origin "{args[0]}"
              Access-Control-Allow-Methods "GET, POST, PUT, PATCH, DELETE, OPTIONS"
              Access-Control-Allow-Credentials "false"
              Access-Control-Allow-Headers "$${args[1]}"
              Access-Control-Max-Age "86400"
              defer
            }
            respond "" 204
          }

          handle @cors{args[0]} {
            header {
              Access-Control-Allow-Origin "{args[0]}"
              Access-Control-Expose-Headers *
              defer
            }
          }
        '';
      in
      {
        logFormat = "";
        extraConfig = ''
          import ${cors} https://hugo-chat.noratrieb.dev "DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type"
          encode zstd gzip
          reverse_proxy * localhost:5001
        '';
      };
  };

  services.custom-backup.jobs = [
    {
      app = "hugo-chat";
      pgDump = {
        containerName = "hugo-chat-db";
        dbName = "postgres";
        userName = "postgres";
      };
    }
  ];

  # https://www.reddit.com/r/NixOS/comments/13e5w6b/does_anyone_have_a_working_nixos_ocicontainers/
  systemd.services.init-hugo-chat-podman-network = {
    description = "Create the network bridge for hugo-chat.";
    after = [ "network.target" ];
    wantedBy = [ "multi-user.target" ];
    serviceConfig.Type = "oneshot";
    script = ''
      	${lib.getExe pkgs.podman} network create hugo-chat || true
      	'';
  };
  system.activationScripts.makeHugoChatDir = lib.stringAfter [ "var" ] ''
    mkdir -p /var/lib/hugo-chat/data
  '';
}