fix(service): Do not use contact avatar path when contact has no avatar

lib/service/contacts.dart

@@ -41,19 +41,25 @@ class ContactsService {
   final Map<String, String?> _contactDisplayNames = {};
 
   Future<void> initialize() async {
-    if (await _canUseContactIntegration()) {
-      enableDatabaseListener();
+    await enable(shouldScan: false);
+  }
+
+  /// Enable listening to contact database events. If [shouldScan] is true, also
+  /// performs a scan of the contacts database, if we're allowed.
+  Future<void> enable({bool shouldScan = true}) async {
+    FlutterContacts.addListener(_onContactsDatabaseUpdate);
+
+    if (shouldScan && await _canUseContactIntegration()) {
+      unawaited(scanContacts());
     }
   }
 
-  /// Enable listening to contact database events
-  void enableDatabaseListener() {
-    FlutterContacts.addListener(_onContactsDatabaseUpdate);
-  }
-
-  /// Disable listening to contact database events
-  void disableDatabaseListener() {
+  /// Disable listening to contact database events. Also removes all roster items
+  /// that are pseudo roster items.
+  Future<void> disable() async {
     FlutterContacts.removeListener(_onContactsDatabaseUpdate);
+
+    await GetIt.I.get<RosterService>().removePseudoRosterItems();
   }
 
   Future<void> _onContactsDatabaseUpdate() async {
@@ -123,7 +129,6 @@ class ContactsService {
   Future<Map<String, String>> _getContactIds() async {
     if (_contactIds != null) return _contactIds!;
 
-    // TODO(Unknown): Can we just .cast<String, String>() here?
     _contactIds = Map<String, String>.fromEntries(
       (await GetIt.I.get<DatabaseService>().database.query(contactsTable)).map(
         (item) => MapEntry(
@@ -276,7 +281,7 @@ class ContactsService {
           return cs.updateConversation(
             contact.jid,
             contactId: contact.id,
-            contactAvatarPath: contactAvatarPath,
+            contactAvatarPath: contact.thumbnail != null ? contactAvatarPath : null,
             contactDisplayName: contact.displayName,
           );
         },

lib/service/events.dart

@@ -394,13 +394,13 @@ Future<void> performSetPreferences(
   final css = GetIt.I.get<ContactsService>();
   if (command.preferences.enableContactIntegration) {
     if (!oldPrefs.enableContactIntegration) {
-      css.enableDatabaseListener();
+      await css.enable();
     }
 
     unawaited(css.scanContacts());
   } else {
     if (oldPrefs.enableContactIntegration) {
-      css.disableDatabaseListener();
+      await css.disable();
     }
   }
 

lib/service/roster.dart

@@ -257,4 +257,25 @@ class RosterService {
 
     return false;
   }
+
+  /// Removes all roster items that are pseudo roster items.
+  Future<void> removePseudoRosterItems() async {
+    final items = await getRoster();
+    final removed = List<String>.empty(growable: true);
+    for (final item in items) {
+      if (!item.pseudoRosterItem) continue;
+
+      assert(
+        item.contactId != null,
+        'Only pseudo roster items that are for the contact integration should ge removed',
+      );
+
+      removed.add(item.jid);
+      await removeRosterItem(item.id);
+    }
+
+    sendEvent(
+      RosterDiffEvent(removed: removed),
+    );
+  }
 }