Add module.nix

2023-04-24 09:49:57 -07:00
parent ff0822d1bc
commit 08f8d721fa
4 changed files with 98 additions and 13 deletions
@@ -0,0 +1,71 @@
+packages:
+
+{ config, lib, pkgs, ... }:
+
+with lib;
+let
+  snooper-server = packages."${pkgs.system}.snooper-server";
+  cfg = config.services.snooper;
+
+in {
+  options.services.snooper = with types; {
+    enable = mkEnableOption "Enable Snooper notifiaction server.";
+
+    verbose = mkEnableOption "Generate verbose logs and output.";
+
+    event-topics = mkOption {
+      type = listOf str;
+      description = "MQTT topics on which to listen for detection events.";
+    };
+
+    notification-topic = mkOption {
+      type = str;
+      description = "MQTT topic on which to send notifications.";
+    };
+
+    mqtt-client = {
+      host = mkOption {
+        type = str;
+        description = "Hostname of the MQTT server.";
+      };
+
+      port = mkOption {
+        type = port;
+        description = "Port on which the MQTT server is listening.";
+        default = 1883;
+      };
+
+      username = mkOption {
+        type = str;
+        description = "User as which to connect to the MQTT server.";
+      };
+
+      password-file = mkOption {
+        type = str;
+        description =
+          "File (on the local host) containing the password for the MQTT server.";
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.services.snooper = {
+      path = [ snooper-server ];
+      wantedBy = [ "multi-user.target" ];
+      serviceConfig = {
+        DynamicUser = true;
+        LoadCredential = [ "mqtt.passwd:${cfg.mqtt-client.password-file}" ];
+        ExecStart = pkgs.writeShellScript "snooper-server.sh"
+          (concatStringsSep " " ([
+            "snooper-server"
+            "--mqtt-host=${cfg.mqtt.host}"
+            "--mqtt-port=${toString cfg.mqtt.port}"
+            "--mqtt-user=${cfg.mqtt.username}"
+            "--mqtt-password-file=$CREDENTIALS_DIRECTORY/mqtt.passwd"
+            "--notification-topic=${cfg.notification-topic}"
+          ] ++ (map (topic: "--event-topic=${topic}") cfg.event-topics)
+            ++ (optional cfg.verbose "--verbose")));
+      };
+    };
+  };
+}