Implement Gtk Network Status (#165)

Implemented
- Switch reacts to burrow socket and network changes 
- meson as build system
- Basic diagnostics to ensure burrow is installed properly
- Flatpak / Meson Building

burrow-gtk/src/components/switch_screen.rs

@@ -0,0 +1,158 @@
+use super::*;
+
+pub struct SwitchScreen {
+    daemon_client: Arc<Mutex<Option<DaemonClient>>>,
+    switch: gtk::Switch,
+    switch_screen: gtk::Box,
+    disconnected_banner: adw::Banner,
+}
+
+pub struct SwitchScreenInit {
+    pub daemon_client: Arc<Mutex<Option<DaemonClient>>>,
+}
+
+#[derive(Debug, PartialEq, Eq)]
+pub enum SwitchScreenMsg {
+    DaemonReconnect,
+    DaemonDisconnect,
+    Start,
+    Stop,
+}
+
+#[relm4::component(pub, async)]
+impl AsyncComponent for SwitchScreen {
+    type Init = SwitchScreenInit;
+    type Input = SwitchScreenMsg;
+    type Output = ();
+    type CommandOutput = ();
+
+    view! {
+        gtk::Box {
+            set_orientation: gtk::Orientation::Vertical,
+            set_valign: Align::BaselineFill,
+
+            gtk::Box {
+                set_orientation: gtk::Orientation::Vertical,
+                set_spacing: 5,
+                set_margin_all: 5,
+                set_valign: Align::Start,
+
+                #[name(setup_banner)]
+                adw::Banner {
+                    set_title: "Burrow is not running!",
+                },
+            },
+
+            #[name(switch_screen)]
+            gtk::Box {
+                set_orientation: gtk::Orientation::Vertical,
+                set_spacing: 10,
+                set_margin_all: 5,
+                set_valign: Align::Center,
+                set_vexpand: true,
+
+                gtk::Label {
+                    set_label: "Burrow Switch",
+                },
+
+                #[name(switch)]
+                gtk::Switch {
+                    set_halign: Align::Center,
+                    set_hexpand: false,
+                    set_vexpand: false,
+                    connect_active_notify => move |switch|
+                        sender.input(if switch.is_active() { SwitchScreenMsg::Start } else { SwitchScreenMsg::Stop })
+                },
+            }
+        }
+    }
+
+    async fn init(
+        init: Self::Init,
+        root: Self::Root,
+        sender: AsyncComponentSender<Self>,
+    ) -> AsyncComponentParts<Self> {
+        let mut initial_switch_status = false;
+        let mut initial_daemon_server_down = false;
+
+        if let Some(daemon_client) = init.daemon_client.lock().await.as_mut() {
+            if let Ok(res) = daemon_client
+                .send_command(DaemonCommand::ServerInfo)
+                .await
+                .as_ref()
+            {
+                initial_switch_status = match res.result.as_ref() {
+                    Ok(DaemonResponseData::None) => false,
+                    Ok(DaemonResponseData::ServerInfo(_)) => true,
+                    _ => false,
+                };
+            } else {
+                initial_daemon_server_down = true;
+            }
+        } else {
+            initial_daemon_server_down = true;
+        }
+
+        let widgets = view_output!();
+
+        widgets.switch.set_active(initial_switch_status);
+
+        if initial_daemon_server_down {
+            *init.daemon_client.lock().await = None;
+            widgets.switch.set_active(false);
+            widgets.switch_screen.set_sensitive(false);
+            widgets.setup_banner.set_revealed(true);
+        }
+
+        let model = SwitchScreen {
+            daemon_client: init.daemon_client,
+            switch: widgets.switch.clone(),
+            switch_screen: widgets.switch_screen.clone(),
+            disconnected_banner: widgets.setup_banner.clone(),
+        };
+
+        AsyncComponentParts { model, widgets }
+    }
+
+    async fn update(
+        &mut self,
+        msg: Self::Input,
+        _: AsyncComponentSender<Self>,
+        _root: &Self::Root,
+    ) {
+        let mut disconnected_daemon_client = false;
+
+        if let Some(daemon_client) = self.daemon_client.lock().await.as_mut() {
+            match msg {
+                Self::Input::Start => {
+                    if let Err(_e) = daemon_client
+                        .send_command(DaemonCommand::Start(Default::default()))
+                        .await
+                    {
+                        disconnected_daemon_client = true;
+                    }
+                }
+                Self::Input::Stop => {
+                    if let Err(_e) = daemon_client.send_command(DaemonCommand::Stop).await {
+                        disconnected_daemon_client = true;
+                    }
+                }
+                _ => {}
+            }
+        } else {
+            disconnected_daemon_client = true;
+        }
+
+        if msg == Self::Input::DaemonReconnect {
+            self.disconnected_banner.set_revealed(false);
+            self.switch_screen.set_sensitive(true);
+        }
+
+        if disconnected_daemon_client || msg == Self::Input::DaemonDisconnect {
+            *self.daemon_client.lock().await = None;
+            self.switch.set_active(false);
+            self.switch_screen.set_sensitive(false);
+            self.disconnected_banner.set_revealed(true);
+        }
+    }
+}