scrutiny-collector: add module

modules/modules.nix

@@ -335,6 +335,7 @@ let
     ./services/rsibreak.nix
     ./services/safeeyes.nix
     ./services/screen-locker.nix
+    ./services/scrutiny-collector.nix
     ./services/sctd.nix
     ./services/signaturepdf.nix
     ./services/spotifyd.nix

modules/services/scrutiny-collector.nix

@@ -0,0 +1,127 @@
+{ config, osConfig, lib, pkgs, ... }:
+
+let
+  inherit (lib) mkEnableOption mkIf mkOption mkPackageOption types mdDoc;
+
+  cfg = config.services.scrutiny-collector;
+in {
+  meta.maintainers = [ lib.maintainers.dudeofawesome or "dudeofawesome" ];
+
+  options.services.scrutiny-collector = {
+    enable = mkEnableOption (mdDoc "scrutiny-collector");
+
+    package = mkPackageOption pkgs "scrutiny-collector" { };
+
+    config-path = mkOption {
+      type = types.nullOr types.path;
+      default = null;
+      description = mdDoc ''
+        Specify the path to the devices file
+      '';
+    };
+
+    configuration = mkOption {
+      type = types.nullOr (pkgs.formats.yaml { }).type;
+      default = null;
+      description = lib.mdDoc ''
+        Specify the configuration for the Scrutiny collector in Nix.
+      '';
+    };
+
+    api-endpoint = mkOption {
+      type = types.str;
+      default = "http://localhost:8080";
+      description = mdDoc ''
+        The api server endpoint
+      '';
+    };
+
+    log-file = mkOption {
+      type = types.nullOr types.path;
+      default = null;
+      description = mdDoc ''
+        Path to file for logging. Leave empty to use STDOUT
+      '';
+    };
+
+    debug = mkEnableOption "debug logging";
+
+    host-id = mkOption {
+      type = types.str;
+      default = osConfig.networking.hostName;
+      defaultText = lib.literalExpression "config.networking.hostName";
+      description = mdDoc ''
+        Host identifier/label, used for grouping devices
+      '';
+    };
+
+    # TODO: this needs to be a list of calendar attrs
+    calendar = mkOption {
+      type = types.str;
+      default = "*-*-* 00:00:00";
+      description = mdDoc ''
+        Configured when to run the service systemd unit (DayOfWeek Year-Month-Day Hour:Minute:Second).
+      '';
+    };
+
+    # TODO: is this relevant?
+    user = mkOption {
+      type = types.str;
+      default = "scrutiny-collector";
+      description = mdDoc ''
+        User under which the scrutiny collector service runs.
+      '';
+    };
+
+    # TODO: is this relevant?
+    group = mkOption {
+      type = types.str;
+      default = "scrutiny-collector";
+      description = mdDoc ''
+        Group under which the scrutiny collector service runs.
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable (let
+    configFile = if cfg.configuration != null then
+      (pkgs.writeTextFile {
+        name = "collector.yaml";
+        text = (lib.generators.toYAML { } cfg.configuration);
+      })
+    else
+      null;
+  in lib.mkMerge [
+    { home.packages = [ cfg.package ]; }
+    (mkIf pkgs.stdenv.targetPlatform.isDarwin {
+      launchd.agents.scrutiny-collector = (let
+        args = lib.pipe {
+          inherit (cfg) api-endpoint log-file debug host-id;
+          config =
+            if cfg.config-path != null then cfg.config-path else configFile;
+        } [
+          (lib.filterAttrs (arg: value: value != null && value != false))
+          (lib.mapAttrs' (arg: value: {
+            name =
+              "${if builtins.stringLength arg > 1 then "--" else "-"}${arg}";
+            inherit value;
+          }))
+          (lib.mapAttrsToList
+            (arg: value: [ arg ] ++ (if value != true then [ value ] else [ ])))
+          (lib.flatten)
+        ];
+      in {
+        enable = true;
+        config = {
+          ProgramArguments = [ "${cfg.package}/bin/collector-metrics" "run" ]
+            ++ args;
+
+          StartCalendarInterval = [{
+            Hour = 0;
+            Minute = 0;
+          }];
+        };
+      });
+    })
+  ]);
+}