feat: allow HASS to close its own page via POST /close-hass and make Chromium fullscreen

shell.nix

@@ -19,6 +19,7 @@ pkgs.mkShell {
     libXi
     openssl
     alsa-lib
+    python3
   ];
 
   shellHook = ''

src/config.rs

@@ -20,6 +20,8 @@ pub enum ConfigError {
 pub struct Config {
     pub token: Option<String>,
     pub home_assistant_url: String,
+    /// Port for the HTTP listener that accepts `POST /close-hass` from HASS.
+    pub hass_api_port: u16,
     pub cashcode_serial_port: String,
     pub cctalk_serial_port: String,
     /// Override the value for specific coin positions (channels).
@@ -36,6 +38,7 @@ impl Default for Config {
         Self {
             token: None,
             home_assistant_url: "https://ha.hackem.cc/web-dramma/0?BrowserID=dramma".to_string(),
+            hass_api_port: 8321,
             cashcode_serial_port:
                 "/dev/serial/by-id/usb-Prolific_Technology_Inc._USB-Serial_Controller_D-if00-port0"
                     .to_string(),

src/home_assistant.rs

@@ -1,5 +1,8 @@
 use log::{error, info};
+use std::io::{Read, Write};
+use std::net::TcpListener;
 use std::process::{Child, Command};
+use std::sync::mpsc::Sender;
 use std::sync::{Arc, Mutex};
 
 /// Manages a Chromium subprocess for displaying Home Assistant
@@ -30,7 +33,7 @@ impl ChromiumManager {
         // Try chromium first, then chromium-browser as fallback (different Debian versions)
         let command_result = Command::new("chromium")
             .arg("--app=".to_string() + url)
-            .arg("--window-size=1280,940")
+            .arg("--start-fullscreen")
             .arg("--window-position=0,0")
             .arg("--disable-infobars")
             .arg("--noerrdialogs")
@@ -50,7 +53,7 @@ impl ChromiumManager {
                 // Fallback to chromium-browser
                 Command::new("chromium-browser")
                     .arg("--app=".to_string() + url)
-                    .arg("--window-size=1280,940")
+                    .arg("--start-fullscreen")
                     .arg("--window-position=0,0")
                     .arg("--disable-infobars")
                     .arg("--noerrdialogs")
@@ -108,3 +111,45 @@ impl Drop for ChromiumManager {
         self.close();
     }
 }
+
+/// Starts a simple HTTP listener for remote control from Home Assistant.
+/// When a `POST /close-hass` request is received, sends a signal through `tx`.
+pub fn start_close_listener(port: u16, tx: Sender<()>) {
+    let addr = format!("0.0.0.0:{}", port);
+    let listener = match TcpListener::bind(&addr) {
+        Ok(l) => l,
+        Err(e) => {
+            error!("Failed to bind HASS close listener on {}: {}", addr, e);
+            return;
+        }
+    };
+    info!("🏠 Home Assistant close listener on port {}", port);
+
+    for stream in listener.incoming() {
+        let Ok(mut stream) = stream else {
+            continue;
+        };
+        let mut buf = [0u8; 512];
+        let Ok(n) = stream.read(&mut buf) else {
+            continue;
+        };
+        let request = String::from_utf8_lossy(&buf[..n]);
+        let first_line = request.lines().next().unwrap_or("");
+
+        if first_line.starts_with("POST /close-hass") {
+            info!("🏠 Received remote close-hass request");
+            let _ = tx.send(());
+            let _ = stream.write_all(
+                b"HTTP/1.1 200 OK\r\nAccess-Control-Allow-Origin: *\r\nContent-Length: 2\r\n\r\nOK",
+            );
+        } else if first_line.starts_with("OPTIONS") {
+            // CORS preflight
+            let _ = stream.write_all(
+                b"HTTP/1.1 204 No Content\r\nAccess-Control-Allow-Origin: *\r\nAccess-Control-Allow-Methods: POST, OPTIONS\r\nAccess-Control-Allow-Headers: Content-Type\r\n\r\n",
+            );
+        } else {
+            let _ =
+                stream.write_all(b"HTTP/1.1 404 Not Found\r\nContent-Length: 9\r\n\r\nNot Found");
+        }
+    }
+}

src/main.rs

@@ -623,5 +623,27 @@ mod home_assistant_handler {
             info!("Hiding Home Assistant page, closing Chromium");
             chromium_hide.close();
         });
+
+        // HTTP listener so HASS can POST /close-hass to dismiss its own page
+        let (tx, rx) = std::sync::mpsc::channel::<()>();
+        let port = config.hass_api_port;
+        thread::spawn(move || {
+            home_assistant::start_close_listener(port, tx);
+        });
+
+        let weak = app.as_weak();
+        let timer = slint::Timer::default();
+        timer.start(
+            slint::TimerMode::Repeated,
+            std::time::Duration::from_millis(200),
+            move || {
+                if rx.try_recv().is_ok()
+                    && let Some(window) = weak.upgrade()
+                {
+                    window.invoke_close_hass_remote();
+                }
+            },
+        );
+        std::mem::forget(timer);
     }
 }

ui/main_window.slint

@@ -47,6 +47,12 @@ export component MainWindow inherits Window {
     callback fetch-usernames();  // fetches available-usernames for autocomplete
     callback confetti-started();  // tells rust to start confetti dismiss timer
 
+    /// Called from Rust when HASS sends a POST /close-hass request.
+    public function close-hass-remote() {
+        root.hide-home-assistant();
+        root.current-page = Page.Main;
+    }
+
     title: "Donation Machine";
     width: 1280px;
     height: 1024px;

ui/pages/home_assistant.slint

@@ -2,82 +2,88 @@ import { Button, Palette } from "std-widgets.slint";
 
 export component HomeAssistant inherits Rectangle {
     in-out property <string> home-assistant-url: "";
-    
+
     callback back-clicked();
-    
+
     background: Palette.background;
-    
+
     VerticalLayout {
         alignment: start;
         padding: 16px;
         spacing: 16px;
-        
+
         // back button
         HorizontalLayout {
             alignment: start;
-            
+
             Button {
                 text: "← Back";
                 width: 150px;
                 height: 60px;
-                
+
                 clicked => {
                     root.back-clicked();
                 }
             }
         }
-
-        // hass iframe placeholder
-        // until slint supports html iframes
+
+        // status panel behind fullscreen Chromium
         Rectangle {
             background: #1a1a1a;
             border-width: 2px;
             border-color: #333333;
             border-radius: 8px;
             vertical-stretch: 1;
-            
+
             VerticalLayout {
                 alignment: center;
                 padding: 32px;
-
+                spacing: 12px;
+
+                Text {
+                    text: "🏠";
+                    font-size: 64px;
+                    horizontal-alignment: center;
+                }
+
                 Text {
-                    text: "Home Assistant";
+                    text: "Home Assistant Opened!";
                     font-size: 28px;
                     font-weight: 700;
-                    color: #ffffff;
+                    color: #4caf50;
                     horizontal-alignment: center;
                 }
-
-                Rectangle {
-                    height: 20px;
-                }
-
+
                 Text {
-                    text: root.home-assistant-url != "" ? "Connected to: " + root.home-assistant-url : "No URL configured";
+                    text: "Chromium is running in fullscreen";
                     font-size: 16px;
                     color: #cccccc;
                     horizontal-alignment: center;
-                    wrap: word-wrap;
                 }
-
-                Rectangle {
-                    height: 20px;
+
+                Rectangle { height: 8px; }
+
+                Text {
+                    text: root.home-assistant-url != "" ? root.home-assistant-url : "No URL configured";
+                    font-size: 13px;
+                    color: #888888;
+                    horizontal-alignment: center;
+                    wrap: word-wrap;
                 }
-
+
+                Rectangle { height: 24px; }
+
                 Text {
-                    text: "⚠️ Web view integration needed";
+                    text: "If you see this screen instead of Home Assistant:";
                     font-size: 14px;
+                    font-weight: 600;
                     color: #ff9800;
                     horizontal-alignment: center;
                 }
-
-                Rectangle {
-                    height: 10px;
-                }
-
+
                 Text {
-                    text: "if hass did not started,\nconfigure the iframe URL in .config/dramma.toml\nor install chromium huh";
-                    font-size: 12px;
+                    text: "• Make sure chromium is installed\n• Check .config/dramma.toml has the correct home_assistant_url\n• You can close this page with POST /close-hass";
+                    font-size: 13px;
                     color: #999999;
                     horizontal-alignment: center;
                     wrap: word-wrap;