From 831426948ff066de759cc693330aa84edb886edc Mon Sep 17 00:00:00 2001
From: Smittix <jamessmith1@outlook.com>
Date: Tue, 17 Feb 2026 09:38:02 +0000
Subject: [PATCH] fix: Reconnect VDL2/ACARS streams after navigating away from
 ADS-B dashboard

When navigating away from the dashboard and back, the page reloads with
no knowledge of running decoders. Add status checks on page load to sync
UI state and reconnect SSE streams. Also add auto-reconnect on SSE error
with guard conditions to prevent loops when intentionally stopped.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 templates/adsb_dashboard.html | 44 ++++++++++++++++++++++++++++++++++-
 1 file changed, 43 insertions(+), 1 deletion(-)

diff --git a/templates/adsb_dashboard.html b/templates/adsb_dashboard.html
index 47970bb..9917cf2 100644
--- a/templates/adsb_dashboard.html
+++ b/templates/adsb_dashboard.html
@@ -3359,6 +3359,22 @@ sudo make install</code>
                 sidebar.classList.add('collapsed');
             }
             updateAcarsFreqCheckboxes();
+
+            // Check if ACARS is already running (e.g. after page reload)
+            fetch('/acars/status')
+                .then(r => r.json())
+                .then(data => {
+                    if (data.running) {
+                        isAcarsRunning = true;
+                        acarsMessageCount = data.message_count || 0;
+                        document.getElementById('acarsCount').textContent = acarsMessageCount;
+                        document.getElementById('acarsToggleBtn').textContent = '■ STOP ACARS';
+                        document.getElementById('acarsToggleBtn').classList.add('active');
+                        document.getElementById('acarsPanelIndicator').classList.add('active');
+                        startAcarsStream(false);
+                    }
+                })
+                .catch(() => {});
         });
 
         function updateAcarsFreqCheckboxes() {
@@ -3542,6 +3558,11 @@ sudo make install</code>
 
             acarsEventSource.onerror = function() {
                 console.error('ACARS stream error');
+                setTimeout(() => {
+                    if (isAcarsRunning) {
+                        startAcarsStream(acarsCurrentAgent !== null);
+                    }
+                }, 2000);
             };
 
             // Start polling fallback for agent mode
@@ -3872,6 +3893,11 @@ sudo make install</code>
 
             vdl2EventSource.onerror = function() {
                 console.error('VDL2 stream error');
+                setTimeout(() => {
+                    if (isVdl2Running) {
+                        startVdl2Stream(vdl2CurrentAgent !== null);
+                    }
+                }, 2000);
             };
 
             // Start polling fallback for agent mode
@@ -4163,7 +4189,7 @@ sudo make install</code>
             URL.revokeObjectURL(url);
         }
 
-        // Populate VDL2 device selector
+        // Populate VDL2 device selector and check running status
         document.addEventListener('DOMContentLoaded', () => {
             fetch('/devices')
                 .then(r => r.json())
@@ -4185,6 +4211,22 @@ sudo make install</code>
                         }
                     }
                 });
+
+            // Check if VDL2 is already running (e.g. after page reload)
+            fetch('/vdl2/status')
+                .then(r => r.json())
+                .then(data => {
+                    if (data.running) {
+                        isVdl2Running = true;
+                        vdl2MessageCount = data.message_count || 0;
+                        document.getElementById('vdl2Count').textContent = vdl2MessageCount;
+                        document.getElementById('vdl2ToggleBtn').innerHTML = '&#9632; STOP VDL2';
+                        document.getElementById('vdl2ToggleBtn').classList.add('active');
+                        document.getElementById('vdl2PanelIndicator').classList.add('active');
+                        startVdl2Stream(false);
+                    }
+                })
+                .catch(() => {});
         });
 
         // ============================================