From 3683f93300c28011c81a5849132a54774d69ad2f Mon Sep 17 00:00:00 2001
From: Ethel Morgan <eth@ethulhu.co.uk>
Date: Mon, 29 Jun 2020 23:10:16 +0100
Subject: refactor eth.services.catbus-snapcast

---
 nixos/modules/services/catbus-snapcast.nix | 67 ++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 nixos/modules/services/catbus-snapcast.nix

(limited to 'nixos/modules/services/catbus-snapcast.nix')

diff --git a/nixos/modules/services/catbus-snapcast.nix b/nixos/modules/services/catbus-snapcast.nix
new file mode 100644
index 0000000..8ee8301
--- /dev/null
+++ b/nixos/modules/services/catbus-snapcast.nix
@@ -0,0 +1,67 @@
+{ config, lib, pkgs, ... }:
+with lib;
+
+let
+
+  cfg = config.eth.services.catbus-snapcast;
+
+  configJSON = pkgs.writeText "config.json" (builtins.toJSON {
+    mqttBroker = cfg.mqttBroker;
+    topics = cfg.topics;
+    snapcast = cfg.snapcast;
+  });
+
+in {
+
+  options.eth.services.catbus-snapcast = {
+
+    enable = mkEnableOption "Whether to enable the Catbus Snapcast bridge";
+
+    mqttBroker = mkOption {
+      type = types.str;
+      description = "URL of the MQTT broker.";
+      example = "tcp://broker.local:1883";
+    };
+
+    topics = {
+      input = mkOption {
+        type = types.str;
+        description = "MQTT topic for controlling the Snapcast group input";
+        example = "home/house/speakers/input_enum";
+      };
+    };
+
+    snapcast = {
+      groupId = 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-snapcast-bridge = {
+      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;
+      };
+    };
+  };
+
+}
+
-- 
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