add identity page for CertificateRequest status code

src/app/browser/window/tab/item/page.rs

@@ -848,6 +848,24 @@ impl Page {
 
                                                     update.activate(Some(&id));
                                                 },
+                                                // https://geminiprotocol.net/docs/protocol-specification.gmi#status-60
+                                                gemini::client::response::meta::Status::CertificateRequest => {
+                                                    // Define common data
+                                                    let status = Status::Success;
+                                                    let title = "Identity";
+
+                                                    // Update widget
+                                                    content
+                                                        .to_status_identity()
+                                                        .set_title(title);
+
+                                                    // Update meta
+                                                    meta.set_status(status)
+                                                        .set_title(title);
+
+                                                    // Update window
+                                                    update.activate(Some(&id));
+                                                }
                                                 _ => {
                                                     // Define common data
                                                     let status = Status::Failure;

src/app/browser/window/tab/item/page/content.rs

@@ -55,6 +55,16 @@ impl Content {
         status
     }
 
+    /// Set new `content::Status` component for `Self` with new `status::Identity` preset
+    ///
+    /// * action removes previous children component from `Self`
+    pub fn to_status_identity(&self) -> Status {
+        self.clean();
+        let status = Status::new_identity();
+        self.gobject.append(status.gobject());
+        status
+    }
+
     /// Set new `content::Status` component for `Self` with new `status::Loading` preset
     ///
     /// * action removes previous children component from `Self`

src/app/browser/window/tab/item/page/content/status.rs

@@ -1,4 +1,5 @@
 mod failure;
+mod identity;
 mod loading;
 
 use adw::StatusPage;
@@ -20,6 +21,16 @@ impl Status {
         }
     }
 
+    /// Create new identity preset
+    ///
+    /// Useful as placeholder for 60 status code
+    /// https://geminiprotocol.net/docs/protocol-specification.gmi#status-60
+    pub fn new_identity() -> Self {
+        Self {
+            gobject: identity::new_gobject(),
+        }
+    }
+
     /// Create new loading preset
     ///
     /// Useful as placeholder widget for async operations

src/app/browser/window/tab/item/page/content/status/identity.rs

@@ -0,0 +1,29 @@
+use adw::StatusPage;
+use gtk::{prelude::ButtonExt, Align, Button};
+
+// Defaults
+const DEFAULT_ICON_NAME: &str = "avatar-default-symbolic";
+const DEFAULT_TITLE: &str = "Identity";
+const DEFAULT_DESCRIPTION: &str = "Client certificate required to continue!";
+const DEFAULT_BUTTON_LABEL: &str = "Select";
+
+/// Create new default preset for `Identity`
+/// [StatusPage](https://gnome.pages.gitlab.gnome.org/libadwaita/doc/main/class.StatusPage.html)
+pub fn new_gobject() -> StatusPage {
+    // Init certificate selection
+    let button = &Button::builder()
+        .label(DEFAULT_BUTTON_LABEL)
+        .halign(Align::Center)
+        .build();
+
+    // Init events
+    button.connect_activate(|_| {}); // @TODO
+
+    // Init status page
+    StatusPage::builder()
+        .description(DEFAULT_DESCRIPTION)
+        .icon_name(DEFAULT_ICON_NAME)
+        .title(DEFAULT_TITLE)
+        .child(button)
+        .build()
+}