ntfy-client: Init module

modules/home/services/ntfy-client.nix

@@ -0,0 +1,73 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+let
+  cfg = config.custom.services.ntfy-client;
+
+  notifyScript = pkgs.writeShellApplication {
+    name = "ntfy-notify";
+    runtimeInputs = [ pkgs.libnotify ];
+    text = ''
+      case "$NTFY_PRIORITY" in
+        1|2)
+          urgency=low
+          ;;
+        3)
+          urgency=normal
+          ;;
+        4|5)
+          urgency=critical
+          ;;
+      esac
+
+      notify-send \
+        --app-name="ntfy - $NTFY_TOPIC" \
+        --urgency="$urgency" \
+        "$NTFY_TITLE" \
+        "$NTFY_MESSAGE"
+    '';
+  };
+in
+{
+  options.custom.services.ntfy-client = {
+    enable = lib.mkEnableOption "";
+    topic = lib.mkOption {
+      type = lib.types.nonEmptyStr;
+      default = "splitleaf";
+    };
+    server = lib.mkOption {
+      type = lib.types.nonEmptyStr;
+      default = "https://ntfy.sh";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    xdg.configFile."ntfy/client.yml".source =
+      {
+        default-host = cfg.server;
+        subscribe = lib.singleton {
+          topic = cfg.topic;
+          command = lib.getExe notifyScript;
+        };
+      }
+      |> (pkgs.formats.yaml { }).generate "ntfy-client.yml";
+
+    systemd.user.services.ntfy-client = {
+      Install.WantedBy = [ "graphical-session.target" ];
+      Unit = {
+        Description = "ntfy client subscriber";
+        PartOf = [ "graphical-session.target" ];
+        After = [ "graphical-session.target" ];
+        X-Restart-Triggers = [ config.xdg.configFile."ntfy/client.yml".source ];
+      };
+      Service = {
+        ExecStart = "${lib.getExe pkgs.ntfy-sh} subscribe --from-config";
+        Restart = "on-failure";
+        RestartSec = 10;
+      };
+    };
+  };
+}