Add waitUntil()

0.4.0

Author: devxpy

lib/shared_value.dart

@@ -126,6 +126,15 @@ class SharedValue<T> {
     }
   }
 
+  Future<void> waitUntil(bool Function(T) predicate) async {
+    // short-circuit if predicate already satisfied
+    if (predicate(value)) return;
+    // otherwise, run predicate on every change
+    await for (T value in this.stream) {
+      if (predicate(value)) break;
+    }
+  }
+
   /// Try to load the value stored at [key] in shared preferences.
   /// If no value is found, return immediately.
   /// Else, udpdate [value] and rebuild dependent widgets if it changed.

pubspec.yaml

@@ -1,6 +1,6 @@
 name: shared_value
 description: A straightforward way to manage global state in flutter apps.
-version: 0.3.3
+version: 0.4.0
 author: Dev Aggarwal <[email protected]>
 homepage: https://github.com/pycampers/flutter-global-state