1 files changed, 93 insertions, 0 deletions
diff --git a/nixos/modules/services/catbus-bridge-snapcast.nix b/nixos/modules/services/catbus-bridge-snapcast.nix
new file mode 100644
index 0000000..6e7badf
--- /dev/null
+++ b/nixos/modules/services/catbus-bridge-snapcast.nix
@@ -0,0 +1,93 @@
+{ config, lib, pkgs, ... }:
+with lib;
+
+let
+
+  cfg = config.eth.services.catbus-bridge-snapcast;
+
+  configJSON = pkgs.writeText "config.json" ''
+      {
+        "broker_host": "${cfg.mqttBroker.host}",
+        "broker_port": ${toString cfg.mqttBroker.port},
+
+        "snapserver_host": "${cfg.snapserver.host}",
+        "snapserver_port": ${toString cfg.snapserver.port},
+
+        "topic_input": "${cfg.topics.input}",
+
+        "snapcast_group_id": "${cfg.snapcastGroupID}"
+      }
+  '';
+
+in {
+
+  options.eth.services.catbus-bridge-snapcast = {
+
+    enable = mkEnableOption "Whether to enable the Catbus Snapcast bridge";
+
+    mqttBroker = {
+      host = mkOption {
+        type = types.str;
+        description = "Host of the MQTT broker.";
+        example = "localhost";
+      };
+      port = mkOption {
+        type = types.int;
+        description = "Port of the MQTT broker.";
+        default = 1883;
+      };
+    };
+
+    snapserver = {
+      host = mkOption {
+        type = types.str;
+        description = "Host of the Snapserver.";
+        example = "localhost";
+      };
+      port = mkOption {
+        type = types.int;
+        description = "Port of the Snapserver.";
+        default = 1705;
+      };
+    };
+
+    topics = {
+      input = mkOption {
+        type = types.str;
+        description = "MQTT topic for controlling the Snapcast group input";
+        example = "home/house/speakers/input_enum";
+      };
+    };
+
+    snapcastGroupID = mkOption {
+      type = types.str;
+      description = "The ID of the Snapcast group to control";
+      example = "352aba34-0ba8-8a4e-9f46-cb634b1c800a";
+    };
+  };
+
+
+  config = mkIf cfg.enable {
+    systemd.services.catbus-bridge-snapcast = {
+      enable = true;
+      description = "Control Snapcast via Catbus";
+      wants = [ "network.target" ];
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+      serviceConfig = {
+        DynamicUser = true;
+
+        ExecStart = "${pkgs.eth.catbus-snapcast}/bin/catbus-bridge-snapcast --config-path ${configJSON}";
+
+        NoNewPrivileges = true;
+        ProtectKernelTunables = true;
+        ProtectControlGroups = true;
+        ProtectKernelModules = true;
+        RestrictAddressFamilies = "AF_INET AF_INET6";
+        RestrictNamespaces = true;
+      };
+    };
+  };
+
+}
+