feat: Implement set_wallpaper_uri method in Wallpaper.Portal

src/Wallpaper/Portal.vala

@@ -1,14 +1,114 @@
 [DBus (name = "org.freedesktop.impl.portal.Wallpaper")]
 public class Wallpaper.Portal : Object {
     private DBusConnection connection;
+    private const string BACKGROUND_SCHEMA = "org.gnome.desktop.background";
+    private const string LOCKSCREEN_SCHEMA = "org.gnome.desktop.screensaver";
 
     public Portal (DBusConnection connection) {
         this.connection = connection;
     }
 
+
+    public void show_preview_image(string uri, string parent_window) throws GLib.Error {
+
+        var window = new Gtk.Window();
+        window.title = "Image Preview";
+        window.set_default_size(400, 400);
+        var image = new Gtk.Image.from_file(uri);
+        image.set_size_request(400, 400);
+        var box = new Gtk.Box(Gtk.Orientation.HORIZONTAL, 0);
+        box.append(image);
+        window.set_child(box);
+        window.show();
+
+    }
+
+
+    private void set_gsettings(string schema, string key, string value) throws Error {
+
+        var settings = new GLib.Settings(schema);
+        settings.set_string(key, value);
+        settings.apply();
+
+
+    }
+
+    public void set_background_wallpaper(string uri) throws Error {
+        set_gsettings(BACKGROUND_SCHEMA, "picture-uri", uri);
+    }
+
+    public void set_lockscreen_wallpaper(string uri) throws Error {
+        set_gsettings(LOCKSCREEN_SCHEMA, "picture-uri", uri);
+    }
+
+
     [DBus (name = "SetWallpaperURI")]
-	public async uint set_wallpaper_u_r_i(GLib.ObjectPath handle, string app_id, string parent_window, string uri, GLib.HashTable<string, GLib.Variant> options) throws DBusError, IOError {
-        debug ("set_wallpaper_u_r_i");
-        return 0;
+    public async uint set_wallpaper_uri(GLib.ObjectPath handle, string app_id, string parent_window, string uri, GLib.HashTable<string, GLib.Variant> options, out uint response) throws DBusError, IOError {
+        debug("set_wallpaper_uri");
+
+
+        string get_uri="";
+
+        try {
+            get_uri = Uri.parse(uri, UriFlags.NONE).get_path();
+        } catch (GLib.UriError e) {
+            stderr.printf("Error parsing URI: %s\n", e.message);
+        }
+
+        bool show_preview = false;
+        string set_on = "";
+        if (options != null) {
+            GLib.Variant? showPreviewVariant = options.lookup("show-preview");
+            if (showPreviewVariant != null && showPreviewVariant.get_boolean()) {
+                show_preview = true;
+            }
+
+            GLib.Variant? setOnVariant = options.lookup("set-on");
+            if (setOnVariant != null) {
+                set_on = setOnVariant.get_string();
+            }
+        }
+
+        debug("show-preview: %s", show_preview ? "true" : "false");
+        debug("set-on: %s", set_on);
+
+        if (show_preview) {
+            try{
+                show_preview_image(get_uri,parent_window);
+            } catch (GLib.Error e) {
+                stderr.printf("Error showing preview: %s\n", e.message);
+                return response=1;
+            }
+        }
+
+        uint response_code = 0;
+
+        if (set_on == "background") {
+            try {
+                set_background_wallpaper(get_uri);
+                response_code = 0;
+            } catch (GLib.Error e) {
+                response_code = 1;
+            }
+        } else if (set_on == "lockscreen") {
+            try {
+                set_lockscreen_wallpaper(get_uri);
+                response_code = 0;
+            } catch (GLib.Error e) {
+                response_code = 1;
+            }
+        } else if (set_on == "both") {
+            try {
+                set_background_wallpaper(get_uri);
+                set_lockscreen_wallpaper(get_uri);
+                response_code = 0;
+            } catch (GLib.Error e) {
+                response_code = 1;
+            }
+        } else {
+            response_code = 2;
+        }
+
+        return response=response_code;
     }
 }