show only logged in instances

lib/pages/create_post.dart

@@ -49,12 +49,14 @@ class CreatePost extends HookWidget {
     final titleController = useTextEditingController();
     final bodyController = useTextEditingController();
     final accStore = useAccountsStore();
-    final selectedInstance = useState(instanceUrl ?? accStore.instances.first);
+    final selectedInstance =
+        useState(instanceUrl ?? accStore.loggedInInstances.first);
     final selectedCommunity = useState(communityName);
     final showFancy = useState(false);
     final nsfw = useState(false);
     final delayed = useDelayedLoading();
 
+    // TODO: use drop down from AddAccountPage
     final instanceDropdown = InputDecorator(
       decoration: const InputDecoration(
           contentPadding: EdgeInsets.symmetric(vertical: 1, horizontal: 20),
@@ -63,7 +65,7 @@ class CreatePost extends HookWidget {
         child: DropdownButton<String>(
           value: selectedInstance.value,
           onChanged: (val) => selectedInstance.value = val,
-          items: accStore.instances
+          items: accStore.loggedInInstances
               .map((instance) => DropdownMenuItem(
                     value: instance,
                     child: Text(instance),
@@ -113,8 +115,6 @@ class CreatePost extends HookWidget {
     handleSubmit() async {
       final api = LemmyApi(selectedInstance.value).v1;
 
-      // TODO: this does not handle the case where this instance is added
-      // but user is not logged in
       final token = accStore.defaultTokenFor(selectedInstance.value);
 
       delayed.start();

lib/stores/accounts_store.dart

@@ -133,7 +133,7 @@ abstract class _AccountsStore with Store {
   }
 
   bool isAnonymousFor(String instanceUrl) => Computed(() {
-        if (!users.containsKey(instanceUrl)) {
+        if (!instances.contains(instanceUrl)) {
           return true;
         }
 
@@ -141,11 +141,15 @@ abstract class _AccountsStore with Store {
       }).value;
 
   @computed
-  bool get hasNoAccount => users.values.every((e) => e.isEmpty);
+  bool get hasNoAccount => loggedInInstances.isEmpty;
 
   @computed
   Iterable<String> get instances => users.keys;
 
+  @computed
+  Iterable<String> get loggedInInstances =>
+      instances.where((e) => !isAnonymousFor(e));
+
   /// adds a new account
   /// if it's the first account ever the account is
   /// set as default for the app

lib/stores/accounts_store.g.dart

@@ -37,6 +37,13 @@ mixin _$AccountsStore on _AccountsStore, Store {
       (_$instancesComputed ??= Computed<Iterable<String>>(() => super.instances,
               name: '_AccountsStore.instances'))
           .value;
+  Computed<Iterable<String>> _$loggedInInstancesComputed;
+
+  @override
+  Iterable<String> get loggedInInstances => (_$loggedInInstancesComputed ??=
+          Computed<Iterable<String>>(() => super.loggedInInstances,
+              name: '_AccountsStore.loggedInInstances'))
+      .value;
 
   final _$usersAtom = Atom(name: '_AccountsStore.users');
 
@@ -147,7 +154,8 @@ tokens: ${tokens},
 defaultUser: ${defaultUser},
 defaultToken: ${defaultToken},
 hasNoAccount: ${hasNoAccount},
-instances: ${instances}
+instances: ${instances},
+loggedInInstances: ${loggedInInstances}
     ''';
   }
 }