Add support for registration tokens

README.md

@@ -22,8 +22,16 @@ valac --pkg gtk+-3.0 --pkg webkit2gtk-4.0 signal-captcha-helper.vala
 
 The captcha token is output to standard out when the program completes, so you probably
 want to launch this tool from the terminal so you can see the output. There are no
-options (for now), so just invoke it directly:
+options (for now), so just invoke it directly.
+
+For a captcha token to use when registering an account:
 
 ```
 ./signal-captcha-helper
 ```
+
+for a challenge token to use to send messages:
+
+```
+./signal-captcha-helper --challenge
+```

signal-captcha-helper.vala

@@ -4,13 +4,14 @@ 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 const string CHALLENGE_URL = "https://signalcaptchas.org/challenge/generate.html";
+    private const string REGISTER_URL = "https://signalcaptchas.org/registration/generate.html";
 
     private WebView web_view;
 
     public ValaBrowser () {
         this.title = ValaBrowser.TITLE;
-        set_default_size (450, 600);
+        set_default_size (500, 600);
 
         this.web_view = new WebView ();
         this.web_view.web_context.register_uri_scheme("signalcaptcha", token_issued);
@@ -28,16 +29,24 @@ public class ValaBrowser : Window {
       Gtk.main_quit();
     }
 
-    public void start () {
+    public void start (string url) {
         show_all ();
-        this.web_view.load_uri (DEFAULT_URL);
+        this.web_view.load_uri (url);
     }
 
     public static int main (string[] args) {
         Gtk.init (ref args);
 
         var browser = new ValaBrowser ();
-        browser.start();
+        var url = REGISTER_URL;
+
+        if(args.length > 0) {
+            if(args[1] == "--challenge") {
+                url = CHALLENGE_URL;
+            }
+        }
+
+        browser.start(url);
 
         Gtk.main ();