Add support for firmware update

src/iface-update.c

@@ -0,0 +1,62 @@
+// SPDX-FileCopyrightText: 2024 Geoffrey D. Bennett <g@b4.vu>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include <gtk/gtk.h>
+
+#include "alsa.h"
+#include "device-update-firmware.h"
+#include "gtkhelper.h"
+#include "scarlett2-firmware.h"
+
+GtkWidget *create_iface_update_main(struct alsa_card *card) {
+  GtkWidget *top = gtk_frame_new(NULL);
+  gtk_widget_add_css_class(top, "window-frame");
+
+  GtkWidget *content = gtk_box_new(GTK_ORIENTATION_VERTICAL, 30);
+  gtk_widget_add_css_class(content, "window-content");
+  gtk_widget_add_css_class(content, "top-level-content");
+  gtk_widget_add_css_class(content, "big-padding");
+  gtk_frame_set_child(GTK_FRAME(top), content);
+
+  // explanation
+  GtkWidget *w;
+
+  w = gtk_label_new("Firmware Update Required");
+  gtk_widget_add_css_class(w, "window-title");
+  gtk_box_append(GTK_BOX(content), w);
+
+  uint32_t best_firmware_version =
+    scarlett2_get_best_firmware_version(card->pid);
+
+  if (!best_firmware_version) {
+    w = gtk_label_new(NULL);
+    gtk_label_set_markup(
+      GTK_LABEL(w),
+      "A firmware update is required for this device in order to\n"
+      "access all of its features. Please obtain the firmware from\n"
+      "<a class=\"linktext\" "
+      "href=\"https://github.com/geoffreybennett/scarlett2-firmware\">"
+      "https://github.com/geoffreybennett/scarlett2-firmware</a>,\n"
+      "and restart this application."
+    );
+
+    gtk_box_append(GTK_BOX(content), w);
+    return top;
+  }
+
+  w = gtk_label_new(
+    "A firmware update is required for this device in order to\n"
+    "access all of its features. This process will take about 15\n"
+    "seconds. Please do not disconnect the device during the\n"
+    "update."
+  );
+  gtk_box_append(GTK_BOX(content), w);
+
+  w = gtk_button_new_with_label("Update");
+  g_signal_connect(
+    GTK_BUTTON(w), "clicked", G_CALLBACK(create_update_firmware_window), card
+  );
+  gtk_box_append(GTK_BOX(content), w);
+
+  return top;
+}