Check master service availability in Http Remote control

Issue: #404

Signed-off-by: Jiří Janoušek <[email protected]>

src/nuvolakit-runner/components/base/RuntimeServiceNotAvailableReason.vala

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2018 Jiří Janoušek <[email protected]>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+public class Nuvola.RuntimeServiceNotAvailableReason : Gtk.InfoBar {
+    private unowned Drtgtk.Application app;
+
+    public RuntimeServiceNotAvailableReason(Drtgtk.Application app, string? text=null) {
+        GLib.Object(message_type: Gtk.MessageType.WARNING, show_close_button: false);
+        this.app = app;
+        Gtk.Label label = Drtgtk.Labels.markup(
+            text ?? "Some features have been disabled because Nuvola Runtime Service is not available.");
+        label.hexpand = true;
+        get_content_area().add(label);
+        label.show();
+        add_button("Install Service", 1);
+        vexpand = false;
+        valign = Gtk.Align.START;
+    }
+
+    public override void response(int response_id) {
+        if (response_id == 1) {
+            app.show_uri("https://nuvola.tiliado.eu/nuvola/");
+        }
+    }
+}

src/nuvolakit-runner/components/httpremotecontrol/HttpRemoteControlComponent.vala

@@ -39,6 +39,7 @@ public class Component: Nuvola.Component {
         this.bindings = bindings;
         this.app = app;
         this.ipc_bus = ipc_bus;
+        this.available = ipc_bus.master != null;
         config.bind_object_property("component.httpremotecontrol.", this, "enabled").set_default(false).update_property();
         #else
         available = false;
@@ -50,6 +51,13 @@ public class Component: Nuvola.Component {
         return new Settings(app, ipc_bus);
     }
 
+    public override Gtk.Widget? get_unavailability_widget() {
+        if (ipc_bus.master == null) {
+            return new RuntimeServiceNotAvailableReason(app);
+        }
+        return null;
+    }
+
     protected override bool activate() {
         register(true);
         return true;