From 165847da1ca3c3be627b5968bc77e9a11b3385cb Mon Sep 17 00:00:00 2001
From: Christophe Besson <cbesson@gmail.com>
Date: Sat, 17 Oct 2026 13:29:25 +0200
Subject: feat(android): ask for the local network when a group opens

Android 17 makes it a permission for an application targeting SDK 37.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 .../src/meshbay_hub/static/group-page.js           | 46 +++++++++++++++++++++-
 1 file changed, 45 insertions(+), 1 deletion(-)

(limited to 'packages/meshbay-hub/src/meshbay_hub/static/group-page.js')

diff --git a/packages/meshbay-hub/src/meshbay_hub/static/group-page.js b/packages/meshbay-hub/src/meshbay_hub/static/group-page.js
index 728ffc37..45049a16 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/group-page.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/group-page.js
@@ -31,6 +31,10 @@ import { clearPending, nodePkFromLink, pendingFor } from './invite-link.js';
 // each try is a connection.
 const DEVICE_RETRY_MS = 5000;
 
+// Whether this application has asked for the local network yet in this run:
+// once, when the first group is opened, and again only when the person says so.
+let lanAsked = false;
+
 /** The node's `expires_at` (ISO) in epoch seconds; 0 when it gave none. */
 function _untilSeconds(iso) {
   const ms = Date.parse(iso || '');
@@ -240,6 +244,9 @@ function GroupPage({ groupId, group, token, username, userId, userPrefs,
   const [passInput, setPassInput] = useState('');
   const [passBusy, setPassBusy] = useState(false);
   const [retryKey, setRetryKey] = useState(0);
+  // In the Android application, when the local network was refused: whether
+  // Android will still ask ("prompt") or only its settings can change it.
+  const [lanBlocked, setLanBlocked] = useState('');
   const transportRef = useRef(null);
   const gekRef = useRef(null);
   // One refresh per group: if a fresh token still says we are not a member, we
@@ -398,6 +405,7 @@ function GroupPage({ groupId, group, token, username, userId, userPrefs,
     const connect = async () => {
       setStatus('discovering');
       setError('');
+      setLanBlocked('');
       // Belongs to the connection about to be made, not the group just left.
       setDeviceReady(false);
       gekRef.current = null;
@@ -425,6 +433,16 @@ function GroupPage({ groupId, group, token, username, userId, userPrefs,
         // from the node, or creates one there on a first join.
         const identity = null;
 
+        // Android 17 asks before this application reaches the local network,
+        // where the node usually is: when a group is first opened rather than
+        // at start, and a refusal is explained below if it is why the group
+        // does not open (local_network_blocked).
+        if (platform.localNetwork.available && !lanAsked) {
+          lanAsked = true;
+          try { await platform.localNetwork.request(); } catch { /* the connection says the rest */ }
+          if (cancelled) return;
+        }
+
         setStatus('connecting');
         // Renewed here rather than taken from the prop. This effect no longer
         // re-runs when the token rotates (see the dependency list below), so
@@ -706,7 +724,14 @@ function GroupPage({ groupId, group, token, username, userId, userPrefs,
         // This device dropped the node's local addresses (transport.js
         // localNetworkRefused): a setting to change here, not a node to wait
         // for. Android 17 gates it per application, Chrome from 155.
-        if (err.reason === 'local_network_blocked') {
+        if (err.reason === 'local_network_blocked' && platform.localNetwork.available) {
+          err.message = t('group.lan_blocked_app');
+          try {
+            const state = await platform.localNetwork.state();
+            if (cancelled) return;
+            setLanBlocked(state === 'granted' ? '' : state);
+          } catch { /* the message stands alone */ }
+        } else if (err.reason === 'local_network_blocked') {
           err.message = t(/Android/i.test(navigator.userAgent)
             ? 'group.lan_blocked_android' : 'group.lan_blocked_browser');
         }
@@ -1038,6 +1063,25 @@ function GroupPage({ groupId, group, token, username, userId, userPrefs,
         <button class="admin-btn" style="margin-left:8px;font-size:0.9em"
           onClick=${() => setRetryKey(k => k + 1)}>${t('group.retry')}</button>
       </div>`}
+      ${lanBlocked === 'prompt' && html`
+        <button class="admin-btn" style="margin-bottom:12px" onClick=${async () => {
+          try { await platform.localNetwork.request(); } catch { /* retried either way */ }
+          setRetryKey(k => k + 1);
+        }}>${t('group.lan_allow')}</button>`}
+      ${lanBlocked === 'denied' && html`
+        <p class="settings-hint">${t('group.lan_settings_hint')}</p>
+        <button class="admin-btn" style="margin-bottom:12px" onClick=${() => {
+          // Back from the settings is back in the foreground: try again then.
+          const back = () => {
+            if (document.visibilityState !== 'visible') return;
+            document.removeEventListener('visibilitychange', back);
+            setRetryKey(k => k + 1);
+          };
+          document.addEventListener('visibilitychange', back);
+          platform.localNetwork.openSettings().catch(() => {
+            document.removeEventListener('visibilitychange', back);
+          });
+        }}>${t('group.lan_open_settings')}</button>`}
       ${needsDevice && nativeKeys && html`
         <div class="invite-form" style="margin-bottom:12px">
           <h4>${t('device.add_title')}</h4>
-- 
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