Initial commit

.gitignore

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+captcha-helper

.gitlab.yml

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+build:
+  image: debian:latest
+  before_script:
+    - apt-get update
+    - apt-get install -y valac libwebkit2gtk-4.0-dev
+  script:
+    - valac --pkg gtk+-3.0 --pkg webkit2gtk-4.0 captcha-helper.vala
+  artifacts:
+    paths:
+      - captcha-helper

captcha-helper.vala

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+using Gtk;
+using WebKit;
+
+public class ValaBrowser : Window {
+
+    private const string TITLE = "Signal Captcha Helper";
+    private const string DEFAULT_URL = "https://signalcaptchas.org/registration/generate.html";
+
+    private WebView web_view;
+
+    public ValaBrowser () {
+        this.title = ValaBrowser.TITLE;
+        set_default_size (450, 600);
+
+        this.web_view = new WebView ();
+        this.web_view.web_context.register_uri_scheme("signalcaptcha", token_issued);
+        var scrolled_window = new ScrolledWindow (null, null);
+        scrolled_window.set_policy (PolicyType.AUTOMATIC, PolicyType.AUTOMATIC);
+        scrolled_window.add (this.web_view);
+        add (scrolled_window);
+
+        this.destroy.connect (Gtk.main_quit);
+    }
+
+    private void token_issued(URISchemeRequest request) {
+      print(request.get_uri().substring(16) + "\n");
+      Gtk.main_quit();
+    }
+
+    public void start () {
+        show_all ();
+        this.web_view.load_uri (DEFAULT_URL);
+    }
+
+    public static int main (string[] args) {
+        Gtk.init (ref args);
+
+        var browser = new ValaBrowser ();
+        browser.start();
+
+        Gtk.main ();
+
+        return 0;
+    }
+}