Reload extensions when relevant settings are updated (#3954)

app/src/main/java/eu/kanade/domain/extension/interactor/TrustExtension.kt

@@ -4,6 +4,11 @@ import android.content.pm.PackageInfo
 import androidx.core.content.pm.PackageInfoCompat
 import dev.zacsweers.metro.Inject
 import eu.kanade.domain.source.service.SourcePreferences
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.distinctUntilChanged
+import kotlinx.coroutines.flow.drop
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.merge
 import mihon.domain.extension.repository.ExtensionStoreRepository
 import tachiyomi.core.common.preference.getAndSet
 
@@ -31,4 +36,23 @@ class TrustExtension(
     fun revokeAll() {
         preferences.trustedExtensions.delete()
     }
+
+    /**
+     * Emits whenever what counts as trusted changes, either because a store was added or removed or
+     * because an extension was trusted or had its trust revoked. Both sources replay their current
+     * value, which is dropped.
+     */
+    fun changes(): Flow<Unit> {
+        return merge(
+            // Stores are rewritten whenever their index is refreshed, so only their keys matter here
+            repository.getAllAsFlow()
+                .map { stores -> stores.mapTo(HashSet()) { it.signingKey } }
+                .distinctUntilChanged()
+                .drop(1),
+            preferences.trustedExtensions.changes()
+                .distinctUntilChanged()
+                .drop(1),
+        )
+            .map {}
+    }
 }