Merge pull request 'service worker v4' (#41) from v.1.2.7 into main

Reviewed-on: #41

mih_ui/web/flutter_bootstrap.js

@@ -1,50 +1,5 @@
 {{flutter_js}}
 {{flutter_build_config}}
 
-const serviceWorkerVersion = '{{flutter_service_worker_version}}';
+// This is the default loader that Flutter 3.24 expects
-
+_flutter.loader.load();
-// 1. Let Flutter handle the service worker registration cleanly via its native loader
-_flutter.loader.load({
-  serviceWorkerSettings: {
-    serviceWorkerVersion: serviceWorkerVersion
-  }
-});
-
-// 2. Safely monitor the registration generated by Flutter without double-registering
-if ('serviceWorker' in navigator) {
-  navigator.serviceWorker.ready.then((reg) => {
-    // If an updated worker is already waiting in the background
-    if (reg.waiting) {
-      showUpdatePrompt(reg);
-    }
-
-    // Listen for new updates found while the user has the app open
-    reg.addEventListener('updatefound', () => {
-      const newWorker = reg.installing;
-      if (newWorker) {
-        newWorker.addEventListener('statechange', () => {
-          if (newWorker.state === 'installed' && navigator.serviceWorker.controller) {
-            showUpdatePrompt(reg);
-          }
-        });
-      }
-    });
-  });
-
-  // Guard against infinite reload loops when the controller shifts
-  let refreshing = false;
-  navigator.serviceWorker.addEventListener('controllerchange', () => {
-    if (!refreshing) {
-      refreshing = true;
-      window.location.reload();
-    }
-  });
-}
-
-function showUpdatePrompt(reg) {
-  if (confirm('A new version of MIH is available. Refresh now to update?')) {
-    reg.unregister().then(function () {
-      window.location.reload(); // Unregister and reload to force clear the browser's cache
-    });
-  }
-}

mih_ui/web/index.html

@@ -257,6 +257,46 @@
 	</script>
 
 	<script src="flutter_bootstrap.js" async></script>
+	<script>
+		(function () {
+			if ('serviceWorker' in navigator) {
+				// Wait for the service worker to be ready (registered by Flutter)
+				navigator.serviceWorker.ready.then((registration) => {
+					// If an updated worker is already waiting
+					if (registration.waiting) {
+						showUpdatePrompt(registration);
+					}
+
+					// Listen for new updates while the app is open
+					registration.addEventListener('updatefound', () => {
+						const newWorker = registration.installing;
+						if (newWorker) {
+							newWorker.addEventListener('statechange', () => {
+								if (newWorker.state === 'installed' && navigator.serviceWorker.controller) {
+									showUpdatePrompt(registration);
+								}
+							});
+						}
+					});
+				});
+
+				// Prevent infinite reload loops
+				let refreshing = false;
+				navigator.serviceWorker.addEventListener('controllerchange', () => {
+					if (!refreshing) {
+						refreshing = true;
+						window.location.reload();
+					}
+				});
+			}
+
+			function showUpdatePrompt(reg) {
+				if (confirm('A new version of MIH is available. Refresh now to update?')) {
+					reg.unregister().then(() => window.location.reload());
+				}
+			}
+		})();
+	</script>
 	<script id="pdfjs-lib" src="//cdnjs.cloudflare.com/ajax/libs/pdf.js/3.2.146/pdf.min.js" defer=""></script>
 	<script id="pdfjs-worker" type="text/javascript"
 		src="//cdnjs.cloudflare.com/ajax/libs/pdf.js/3.2.146/pdf.worker.min.js" defer=""></script>