Implemented Wallpaper Selector and Matugen's Wallpaper based auto-theming. (#73)

* Implement matugen - WIP

* Added matugen

* Add types and cleanup code

* Matugen implementation updates and added more options such as scheme and contrast.

* Code cleanup and matugen settings renamed for clarity.

* Makon maroon a primary matugen color.

* Updates to handle variations of matugen colors

* Finalizing matugen and wrapping up variations.

* Minor styling updates of the settings dialog.

* Do a swww dependency check.

* Dependency logic update

* Switch shouldn't double trigger notifications now when checking dependency.

* Logic was inverted

* Add matugen to dependency checker.

* Fixed dependency checking conditional

* Update dependency list in readme and check for matugen before doing matugen operations

* Styling fixes

* OSD Fix

* Remove unused code from wallpaper service.

* Color fixes for matugen.

* Nix updates for new dependencies

* Change default wallpaper to empty.

* Added custom notification service for startup, cleaned up code and updated readme.

lib/utils.ts

@@ -4,6 +4,8 @@ import icons, { substitutes } from "./icons"
 import Gtk from "gi://Gtk?version=3.0"
 import Gdk from "gi://Gdk"
 import GLib from "gi://GLib?version=2.0"
+import GdkPixbuf from "gi://GdkPixbuf";
+import { NotificationArgs } from "types/utils/notify"
 
 export type Binding<T> = import("types/service").Binding<any, any, T>
 
@@ -73,7 +75,12 @@ export function dependencies(...bins: string[]) {
 
     if (missing.length > 0) {
         console.warn(Error(`missing dependencies: ${missing.join(", ")}`))
-        Utils.notify(`missing dependencies: ${missing.join(", ")}`)
+        Notify({
+            summary: "Dependencies not found!",
+            body: `The following dependencies are missing: ${missing.join(", ")}`,
+            iconName: icons.ui.warning,
+            timeout: 7000
+        });
     }
 
     return missing.length === 0
@@ -111,3 +118,30 @@ export function createSurfaceFromWidget(widget: Gtk.Widget) {
     widget.draw(cr)
     return surface
 }
+
+/**
+ * Ensure that the provided filepath is a valid image
+ */
+export const isAnImage = (imgFilePath: string): boolean => {
+    try {
+        GdkPixbuf.Pixbuf.new_from_file(imgFilePath);
+        return true;
+    } catch (error) {
+        return false;
+    }
+}
+
+export const Notify = (notifPayload: NotificationArgs): void => {
+    let command = 'notify-send';
+    command += ` "${notifPayload.summary} "`;
+    if (notifPayload.body) command += ` "${notifPayload.body}" `;
+    if (notifPayload.appName) command += ` -a "${notifPayload.appName}"`;
+    if (notifPayload.iconName) command += ` -i "${notifPayload.iconName}"`;
+    if (notifPayload.urgency) command += ` -u "${notifPayload.urgency}"`;
+    if (notifPayload.timeout !== undefined) command += ` -t ${notifPayload.timeout}`;
+    if (notifPayload.category) command += ` -c "${notifPayload.category}"`;
+    if (notifPayload.transient) command += ` -e`;
+    if (notifPayload.id !== undefined) command += ` -r ${notifPayload.id}`;
+
+    Utils.execAsync(command)
+}