1 files changed, 109 insertions, 0 deletions
diff --git a/modules/matrix-sliding-sync.nix b/modules/matrix-sliding-sync.nix
new file mode 100644
index 0000000..3785515
--- /dev/null
+++ b/modules/matrix-sliding-sync.nix
@@ -0,0 +1,109 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.services.matrix-sliding-sync;
+in
+{
+  imports = [
+    (lib.mkRenamedOptionModule
+      [ "services" "matrix-synapse" "sliding-sync" ]
+      [ "services" "matrix-sliding-sync" ]
+    )
+  ];
+
+  options.services.matrix-sliding-sync = {
+    enable = lib.mkEnableOption (lib.mdDoc "sliding sync");
+
+    package = lib.mkPackageOption pkgs "matrix-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 = lib.mdDoc ''
+              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 = lib.mdDoc ''
+              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 = lib.mdDoc "The interface and port to listen on.";
+          };
+
+          SYNCV3_LOG_LEVEL = lib.mkOption {
+            type = lib.types.enum [ "trace" "debug" "info" "warn" "error" "fatal" ];
+            default = "info";
+            description = lib.mdDoc "The level of verbosity for messages logged.";
+          };
+        };
+      };
+      default = { };
+      description = lib.mdDoc ''
+        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 = lib.mdDoc ''
+        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 = lib.mdDoc ''
+        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 cfg.package;
+        StateDirectory = "matrix-sliding-sync";
+        WorkingDirectory = "%S/matrix-sliding-sync";
+        Restart = "on-failure";
+        RestartSec = "1s";
+      };
+    };
+  };
+}