fix: let a notification's delete skip the unlock when the mail goes to trash #85

android/app/src/main/java/com/anonymous/bulwarkmobile/BulwarkFcmModule.kt

@@ -77,6 +77,10 @@ class BulwarkFcmModule(reactContext: ReactApplicationContext)
         val markReadLabel = options.takeIf { it.hasKey("markReadLabel") }?.getString("markReadLabel") ?: "Mark as read"
         val deleteLabel = options.takeIf { it.hasKey("deleteLabel") }?.getString("deleteLabel") ?: "Delete"
         val replyLabel = options.takeIf { it.hasKey("replyLabel") }?.getString("replyLabel") ?: "Reply"
+        // Delete moves the mail to Trash where there is one: no unlock needed
+        // for that (#85). Without a Trash it destroys the mail, so it asks.
+        // Unlock stays the default for a caller that doesn't say.
+        val deleteNeedsUnlock = !options.hasKey("deleteNeedsUnlock") || options.getBoolean("deleteNeedsUnlock")
 
         // Bitmap fetch + draw off the bridge thread so the caller doesn't
         // block waiting for the favicon request.
@@ -86,7 +90,7 @@ class BulwarkFcmModule(reactContext: ReactApplicationContext)
             postNotification(
                 notificationId, title, body, preview, largeIcon, bgColorHex,
                 emailId, threadId, subject, accountId, jmapAccountId, groupKey,
-                groupTitle, markReadLabel, deleteLabel, replyLabel,
+                groupTitle, markReadLabel, deleteLabel, replyLabel, deleteNeedsUnlock,
             )
             if (groupKey != null) postGroupSummary(groupKey, groupTitle, bgColorHex, accountId)
             promise.resolve(null)
@@ -122,6 +126,7 @@ class BulwarkFcmModule(reactContext: ReactApplicationContext)
         markReadLabel: String,
         deleteLabel: String,
         replyLabel: String,
+        deleteNeedsUnlock: Boolean,
     ) {
         val ctx = reactApplicationContext
         val intent = Intent(ctx, MainActivity::class.java).apply {
@@ -209,8 +214,8 @@ class BulwarkFcmModule(reactContext: ReactApplicationContext)
             )
             builder.addAction(
                 NotificationCompat.Action.Builder(0, deleteLabel, deletePending)
-                    // Android 12+: unlock first, so a locked phone can't delete mail.
+                    // Android 12+: unlock first, so a locked phone can't destroy mail.
-                    .setAuthenticationRequired(true)
+                    .setAuthenticationRequired(deleteNeedsUnlock)
                     .build()
             )
 

src/lib/__tests__/notification-delete-unlock.test.ts

@@ -0,0 +1,49 @@
+import { describe, expect, it } from 'vitest';
+import fs from 'node:fs';
+import path from 'node:path';
+
+// #85: a notification's Delete asked to unlock the phone even where it only
+// moves the mail to Trash. The push task tells the native module
+// (deleteNeedsUnlock: !hasTrash); the module has to use it on the action.
+
+const MODULE = path.resolve(
+  __dirname,
+  '../../../android/app/src/main/java/com/anonymous/bulwarkmobile/BulwarkFcmModule.kt',
+);
+const source = fs.readFileSync(MODULE, 'utf8');
+
+function postNotificationCalls(src: string): string[] {
+  const out: string[] = [];
+  const re = /(?<!fun )\bpostNotification\(/g;
+  let m: RegExpExecArray | null;
+  while ((m = re.exec(src))) {
+    let depth = 0;
+    let i = m.index + 'postNotification'.length;
+    for (; i < src.length; i++) {
+      if (src[i] === '(') depth++;
+      else if (src[i] === ')' && --depth === 0) break;
+    }
+    out.push(src.slice(m.index, i + 1));
+  }
+  return out;
+}
+
+describe('notification Delete action', () => {
+  it('reads deleteNeedsUnlock and keeps unlock as the default', () => {
+    expect(source).toMatch(
+      /val deleteNeedsUnlock = !options\.hasKey\("deleteNeedsUnlock"\) \|\| options\.getBoolean\("deleteNeedsUnlock"\)/,
+    );
+  });
+
+  it('asks to unlock only when told to', () => {
+    expect(source).toMatch(/\.setAuthenticationRequired\(deleteNeedsUnlock\)/);
+    expect(source).not.toMatch(/\.setAuthenticationRequired\(true\)/);
+    expect(source).toMatch(/private fun postNotification\([^)]*deleteNeedsUnlock: Boolean/);
+  });
+
+  it('passes it on every postNotification call', () => {
+    const calls = postNotificationCalls(source);
+    expect(calls.length).toBeGreaterThan(0);
+    for (const call of calls) expect(call).toMatch(/\bdeleteNeedsUnlock\b/);
+  });
+});