swaync: add module

Co-authored-by: Ryan Horiguchi <rhoriguchi@users.noreply.github.com>

modules/misc/news.nix

@@ -1549,6 +1549,18 @@ in {
           your physical disc (HDD/SSD).
         '';
       }
+
+      {
+        time = "2024-04-29T22:01:51+00:00";
+        condition = hostPlatform.isLinux;
+        message = ''
+          A new module is available: 'services.swaync'.
+
+          SwayNotificationCenter is a simple notification daemon with a GTK GUI
+          for notifications and the control center. See
+          https://github.com/ErikReider/SwayNotificationCenter for more.
+        '';
+      }
     ];
   };
 }

modules/modules.nix

@@ -355,6 +355,7 @@ let
     ./services/stalonetray.nix
     ./services/status-notifier-watcher.nix
     ./services/swayidle.nix
+    ./services/swaync.nix
     ./services/swayosd.nix
     ./services/sxhkd.nix
     ./services/syncthing.nix

modules/services/swaync.nix

@@ -0,0 +1,113 @@
+{ pkgs, lib, config, ... }:
+
+let
+
+  cfg = config.services.swaync;
+
+  jsonFormat = pkgs.formats.json { };
+
+in {
+  meta.maintainers = [ lib.hm.maintainers.abayomi185 ];
+
+  options.services.swaync = {
+    enable = lib.mkEnableOption "Swaync notification daemon";
+
+    package = lib.mkPackageOption pkgs "swaynotificationcenter" { };
+
+    style = lib.mkOption {
+      type = lib.types.nullOr (lib.types.either lib.types.path lib.types.lines);
+      default = null;
+      example = ''
+        .notification-row {
+          outline: none;
+        }
+
+        .notification-row:focus,
+        .notification-row:hover {
+          background: @noti-bg-focus;
+        }
+
+        .notification {
+          border-radius: 12px;
+          margin: 6px 12px;
+          box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.3), 0 1px 3px 1px rgba(0, 0, 0, 0.7),
+            0 2px 6px 2px rgba(0, 0, 0, 0.3);
+          padding: 0;
+        }
+      '';
+      description = ''
+        CSS style of the bar. See
+        <https://github.com/ErikReider/SwayNotificationCenter/blob/main/src/style.css>
+        for the documentation.
+
+        If the value is set to a path literal, then the path will be used as the CSS file.
+      '';
+    };
+
+    settings = lib.mkOption {
+      type = jsonFormat.type;
+      default = { };
+      example = lib.literalExpression ''
+        {
+          positionX = "right";
+          positionY = "top";
+          layer = "overlay";
+          control-center-layer = "top";
+          layer-shell = true;
+          cssPriority = "application";
+          control-center-margin-top = 0;
+          control-center-margin-bottom = 0;
+          control-center-margin-right = 0;
+          control-center-margin-left = 0;
+          notification-2fa-action = true;
+          notification-inline-replies = false;
+          notification-icon-size = 64;
+          notification-body-image-height = 100;
+          notification-body-image-width = 200
+        };
+      '';
+      description = ''
+        Configuration written to {file}`$XDG_CONFIG_HOME/swaync/config.json`.
+        See
+        <https://github.com/ErikReider/SwayNotificationCenter/blob/main/src/configSchema.json>
+        for the documentation.
+      '';
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    # at-spi2-core is to minimize journalctl noise of:
+    # "AT-SPI: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files"
+    home.packages = [ cfg.package pkgs.at-spi2-core ];
+
+    xdg.configFile = {
+      "swaync/config.json".source =
+        jsonFormat.generate "config.json" cfg.settings;
+      "swaync/style.css" = lib.mkIf (cfg.style != null) {
+        source = if lib.isStorePath cfg.style then
+          cfg.style
+        else
+          pkgs.writeText "swaync/style.css" cfg.style;
+      };
+    };
+
+    systemd.user.services.swaync = {
+      Unit = {
+        Description = "Swaync notification daemon";
+        Documentation = "https://github.com/ErikReider/SwayNotificationCenter";
+        PartOf = [ "graphical-session.target" ];
+        After = [ "graphical-session-pre.target" ];
+        ConditionEnvironment = "WAYLAND_DISPLAY";
+      };
+
+      Service = {
+        Type = "dbus";
+        BusName = "org.freedesktop.Notifications";
+        ExecStart = "${cfg.package}/bin/swaync";
+        Restart = "on-failure";
+      };
+
+      Install.WantedBy = [ "graphical-session.target" ];
+    };
+  };
+}

tests/default.nix

@@ -260,6 +260,7 @@ in import nmtSrc {
     ./modules/services/screen-locker
     ./modules/services/signaturepdf
     ./modules/services/swayidle
+    ./modules/services/swaync
     ./modules/services/swayosd
     ./modules/services/sxhkd
     ./modules/services/syncthing/linux

tests/modules/services/swaync/default.nix

@@ -0,0 +1 @@
+{ swaync = ./swaync.nix; }

tests/modules/services/swaync/swaync.nix

@@ -0,0 +1,35 @@
+{ config, ... }:
+
+{
+  services.swaync = {
+    enable = true;
+    package = config.lib.test.mkStubPackage {
+      name = "swaync";
+      outPath = "@swaync@";
+    };
+  };
+
+  nmt.script = ''
+    assertFileContent \
+      home-files/.config/systemd/user/swaync.service \
+      ${
+        builtins.toFile "swaync.service" ''
+          [Install]
+          WantedBy=graphical-session.target
+
+          [Service]
+          BusName=org.freedesktop.Notifications
+          ExecStart=@swaync@/bin/swaync
+          Restart=on-failure
+          Type=dbus
+
+          [Unit]
+          After=graphical-session-pre.target
+          ConditionEnvironment=WAYLAND_DISPLAY
+          Description=Swaync notification daemon
+          Documentation=https://github.com/ErikReider/SwayNotificationCenter
+          PartOf=graphical-session.target
+        ''
+      }
+  '';
+}