3 files changed, 234 insertions, 0 deletions
diff --git a/os/kay/modules/matrix/default.nix b/os/kay/modules/matrix/default.nix
new file mode 100644
index 0000000..f81d0d9
--- /dev/null
+++ b/os/kay/modules/matrix/default.nix
@@ -0,0 +1,20 @@
+{ config, ... }: let
+  domain = config.global.userdata.domain;
+in {
+  imports = [
+    ./dendrite.nix
+    ./matrix-sliding-sync.nix
+  ];
+
+  sops.secrets."matrix-${domain}/sliding_sync" = {};
+
+  services.matrix-sliding-sync-dirty = {
+    enable = true;
+    environmentFile = config.sops.secrets."matrix-${domain}/sliding_sync".path;
+
+    settings = {
+      SYNCV3_LOG_LEVEL = "warn";
+      SYNCV3_SERVER = "http://127.0.0.1:${toString config.services.dendrite.httpPort}";
+    };
+  };
+}
diff --git a/os/kay/modules/matrix/dendrite.nix b/os/kay/modules/matrix/dendrite.nix
new file mode 100644
index 0000000..71266a5
--- /dev/null
+++ b/os/kay/modules/matrix/dendrite.nix
@@ -0,0 +1,108 @@
+{ config, lib, pkgs, ... }:
+
+let
+  domain = config.global.userdata.domain;
+  database = {
+    connection_string = "postgres:///dendrite?host=/run/postgresql";
+    max_open_conns = 90;
+    max_idle_conns = 5;
+    conn_max_lifetime = -1;
+  };
+in
+{
+  sops.secrets."matrix-${domain}/key" = {};
+
+  services = {
+    postgresql = {
+      enable = true;
+      package = with pkgs; postgresql_15;
+      settings = {
+        log_timezone = config.time.timeZone;
+        listen_addresses = lib.mkForce "";
+      };
+      ensureDatabases = [ "dendrite" ];
+      ensureUsers = [{
+        name = "dendrite";
+        ensureDBOwnership = true;
+      }];
+      authentication = lib.mkForce "local all all trust";
+    };
+
+    dendrite = {
+      enable = true;
+      loadCredential = [
+        "private_key:${config.sops.secrets."matrix-${domain}/key".path}"
+      ];
+
+      settings = {
+        sync_api.search = {
+          enable = true;
+          index_path = "/var/lib/dendrite/searchindex";
+        };
+        global = {
+          server_name = domain;
+          private_key = "$CREDENTIALS_DIRECTORY/private_key";
+          trusted_third_party_id_servers = [
+            "matrix.org"
+            "vector.im"
+          ];
+          inherit database;
+        };
+        logging = [{
+          type = "std";
+          level = "warn";
+        }];
+        mscs = {
+          inherit database;
+          mscs = [ "msc2836" ];
+        };
+        sync_api = {
+          inherit database;
+          real_ip_header = "X-Real-IP";
+        };
+        media_api = {
+          inherit database;
+          dynamic_thumbnails = true;
+          max_file_size_bytes = 12800000000;
+        };
+        federation_api = {
+          inherit database;
+          send_max_retries = 8;
+          key_perspectives = [{
+            server_name = "matrix.org";
+            keys = [
+              {
+                key_id = "ed25519:auto";
+                public_key = "Noi6WqcDj0QmPxCNQqgezwTlBKrfqehY1u2FyWP9uYw";
+              }
+              {
+                key_id = "ed25519:a_RXGa";
+                public_key = "l8Hft5qXKn1vfHrg3p4+W8gELQVo8N13JkluMfmn2sQ";
+              }
+            ];
+          }];
+        };
+
+        app_service_api = {
+          inherit database;
+        };
+        room_server = {
+          inherit database;
+        };
+        push_server = {
+          inherit database;
+        };
+        relay_api = {
+          inherit database;
+        };
+        key_server = {
+          inherit database;
+        };
+        user_api = {
+          account_database = database;
+          device_database = database;
+        };
+      };
+    };
+  };
+}
diff --git a/os/kay/modules/matrix/matrix-sliding-sync.nix b/os/kay/modules/matrix/matrix-sliding-sync.nix
new file mode 100644
index 0000000..f4c1426
--- /dev/null
+++ b/os/kay/modules/matrix/matrix-sliding-sync.nix
@@ -0,0 +1,106 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.services.matrix-sliding-sync-dirty;
+  matrix-sliding-sync = pkgs.callPackage ../../pkgs/matrix-sliding-sync.nix {};
+in
+{
+  imports = [
+    (lib.mkRenamedOptionModule [ "services" "matrix-synapse" "sliding-sync" ] [ "services" "matrix-sliding-sync" ])
+  ];
+
+  options.services.matrix-sliding-sync-dirty = {
+    enable = lib.mkEnableOption "sliding sync";
+
+    settings = lib.mkOption {
+      type = lib.types.submodule {
+        freeformType = with lib.types; attrsOf str;
+        options = {
+          SYNCV3_SERVER = lib.mkOption {
+            type = lib.types.str;
+            description = ''
+              The destination homeserver to talk to not including `/_matrix/` e.g `https://matrix.example.org`.
+            '';
+          };
+
+          SYNCV3_DB = lib.mkOption {
+            type = lib.types.str;
+            default = "postgresql:///matrix-sliding-sync?host=/run/postgresql";
+            description = ''
+              The postgres connection string.
+              Refer to <https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-CONNSTRING>.
+            '';
+          };
+
+          SYNCV3_BINDADDR = lib.mkOption {
+            type = lib.types.str;
+            default = "127.0.0.1:8009";
+            example = "[::]:8008";
+            description = "The interface and port or path (for unix socket) to listen on.";
+          };
+
+          SYNCV3_LOG_LEVEL = lib.mkOption {
+            type = lib.types.enum [ "trace" "debug" "info" "warn" "error" "fatal" ];
+            default = "info";
+            description = "The level of verbosity for messages logged.";
+          };
+        };
+      };
+      default = { };
+      description = ''
+        Freeform environment variables passed to the sliding sync proxy.
+        Refer to <https://github.com/matrix-org/sliding-sync#setup> for all supported values.
+      '';
+    };
+
+    createDatabase = lib.mkOption {
+      type = lib.types.bool;
+      default = true;
+      description = ''
+        Whether to enable and configure `services.postgres` to ensure that the database user `matrix-sliding-sync`
+        and the database `matrix-sliding-sync` exist.
+      '';
+    };
+
+    environmentFile = lib.mkOption {
+      type = lib.types.str;
+      description = ''
+        Environment file as defined in {manpage}`systemd.exec(5)`.
+
+        This must contain the {env}`SYNCV3_SECRET` variable which should
+        be generated with {command}`openssl rand -hex 32`.
+      '';
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    services.postgresql = lib.optionalAttrs cfg.createDatabase {
+      enable = true;
+      ensureDatabases = [ "matrix-sliding-sync" ];
+      ensureUsers = [ {
+        name = "matrix-sliding-sync";
+        ensureDBOwnership = true;
+      } ];
+    };
+
+    systemd.services.matrix-sliding-sync = rec {
+      after =
+        lib.optional cfg.createDatabase "postgresql.service"
+        ++ lib.optional config.services.dendrite.enable "dendrite.service"
+        ++ lib.optional config.services.matrix-synapse.enable config.services.matrix-synapse.serviceUnit;
+      wants = after;
+      wantedBy = [ "multi-user.target" ];
+      environment = cfg.settings;
+      serviceConfig = {
+        DynamicUser = true;
+        EnvironmentFile = cfg.environmentFile;
+        ExecStart = lib.getExe matrix-sliding-sync;
+        StateDirectory = "matrix-sliding-sync";
+        WorkingDirectory = "%S/matrix-sliding-sync";
+        RuntimeDirectory = "matrix-sliding-sync";
+        Restart = "on-failure";
+        RestartSec = "1s";
+      };
+    };
+  };
+}