build: Fix build with fwupd 2.0.0

Based on
https://gitlab.archlinux.org/archlinux/packaging/packages/switchboard-plug-about/-/commit/d3716abb1a37b88a427a4227bdfb63dcf915f757.

The fwupd_release_get_locations migration is also inspired by
https://invent.kde.org/plasma/discover/-/blob/v6.2.3/libdiscover/backends/FwupdBackend/FwupdBackend.cpp?ref_type=tags#L203.

Offline support is gone
fwupd/fwupd@ee40786

meson.build

@@ -13,7 +13,7 @@ datadir = join_paths(prefix, get_option('datadir'))
 libdir = join_paths(prefix, get_option('libdir'))
 
 glib_dep = dependency('glib-2.0', version: '>=2.64.0')
-
+fwupd_dep = dependency('fwupd')
 appstream_dep = dependency ('appstream', version: '>=0.12.10')
 
 add_project_arguments(
@@ -31,6 +31,10 @@ if glib_dep.version().version_compare ('>=2.73.0')
     vala_flags += ['--define', 'HAS_GLIB_2_73']
 endif
 
+if fwupd_dep.version().version_compare ('>=2.0.0')
+    vala_flags += ['--define', 'HAS_FWUPD_2_0']
+endif
+
 if appstream_dep.version().version_compare('>=1.0')
     vala_flags += ['--define', 'HAS_APPSTREAM_1_0']
 endif

src/Views/FirmwareReleaseView.vala

@@ -194,7 +194,11 @@ public class About.FirmwareReleaseView : Gtk.Box {
         stack.visible_child = scrolled_window;
 
         var release_version = release.get_version ();
+#if HAS_FWUPD_2_0
+        if (release.get_flags () == Fwupd.ReleaseFlags.IS_UPGRADE && release_version != device.get_version ()) {
+#else
         if (release.get_flags () == Fwupd.RELEASE_FLAG_IS_UPGRADE && release_version != device.get_version ()) {
+#endif
             update_button.label = _("Update");
             update_button.sensitive = true;
         } else {

src/Views/FirmwareView.vala

@@ -124,7 +124,11 @@ public class About.FirmwareView : Switchboard.SettingsPage {
     }
 
     private void add_device (Fwupd.Device device) {
+#if HAS_FWUPD_2_0
+        if (device.has_flag (Fwupd.DeviceFlags.UPDATABLE)) {
+#else
         if (device.has_flag (Fwupd.DEVICE_FLAG_UPDATABLE)) {
+#endif
             FirmwareClient.get_upgrades.begin (fwupd_client, device.get_id (), (obj, res) => {
                 Fwupd.Release? release = null;
 
@@ -253,18 +257,35 @@ public class About.FirmwareView : Switchboard.SettingsPage {
     }
 
     private async void continue_update (Fwupd.Device device, Fwupd.Release release) {
+#if HAS_FWUPD_2_0
+        var locations = release.get_locations ();
+        // Typically the first URI will be the main HTTP mirror,
+        // it's unlikely that we'll be using IPFS/IPNS URLs anyway.
+        var path = yield download_file (device, locations.length > 0 ? locations[0] : "");
+#else
         var path = yield download_file (device, release.get_uri ());
+#endif
 
         try {
             var install_flags = Fwupd.InstallFlags.NONE;
+#if !HAS_FWUPD_2_0
             if (device.has_flag (Fwupd.DEVICE_FLAG_ONLY_OFFLINE)) {
                 install_flags = Fwupd.InstallFlags.OFFLINE;
             }
+#endif
 
             if (yield FirmwareClient.install (fwupd_client, device.get_id (), path, install_flags)) {
+#if HAS_FWUPD_2_0
+                if (device.has_flag (Fwupd.DeviceFlags.NEEDS_REBOOT)) {
+#else
                 if (device.has_flag (Fwupd.DEVICE_FLAG_NEEDS_REBOOT)) {
+#endif
                     show_reboot_dialog ();
+#if HAS_FWUPD_2_0
+                } else if (device.has_flag (Fwupd.DeviceFlags.NEEDS_SHUTDOWN)) {
+#else
                 } else if (device.has_flag (Fwupd.DEVICE_FLAG_NEEDS_SHUTDOWN)) {
+#endif
                     show_shutdown_dialog ();
                 }
             }

src/meson.build

@@ -33,7 +33,7 @@ shared_module(
     config_vala,
     css_gresource,
     dependencies: [
-        dependency('fwupd'),
+        fwupd_dep,
         glib_dep,
         dependency('gio-2.0'),
         dependency('gobject-2.0'),