implemented .count(), .isEmpty(), .removeAll(); ready for PR

Author: liquidiert

lib/src/bindings/bindings.dart

@@ -58,6 +58,11 @@ class _ObjectBoxBindings {
   int Function(Pointer<Void> box, int id, Pointer<Void> data, int size, int mode) obx_box_put;
   int Function(Pointer<Void> box, Pointer<Uint64> objects, Pointer<Uint64> ids, int mode) obx_box_put_many;
   int Function(Pointer<Void> box, int id) obx_box_remove;
+  int Function(Pointer<Void> box, Pointer<Uint64> removed) obx_box_remove_all;
+
+  // box analytics
+  int Function(Pointer<Void> box, int limit, Pointer<Uint64> count) obx_box_count;
+  int Function(Pointer<Void> box, Pointer<Uint8> is_empty) obx_box_is_empty;
 
   // TODO return .asFunction() -> requires properly determined static return type
   Pointer<NativeFunction<T>> _fn<T extends Function>(String name) {
@@ -126,6 +131,11 @@ class _ObjectBoxBindings {
     obx_box_put = _fn<obx_box_put_native_t>("obx_box_put").asFunction();
     obx_box_put_many = _fn<obx_box_put_many_native_t>("obx_box_put_many").asFunction();
     obx_box_remove = _fn<obx_box_remove_native_t>("obx_box_remove").asFunction();
+    obx_box_remove_all = _fn<obx_box_remove_all_native_t>("obx_box_remove_all").asFunction();
+
+    // box analytics
+    obx_box_count = _fn<obx_box_count_native_t>("obx_box_count").asFunction();
+    obx_box_is_empty = _fn<obx_box_is_empty_native_t>("obx_box_is_empty").asFunction();
   }
 }
 

lib/src/bindings/signatures.dart

@@ -55,3 +55,6 @@ typedef obx_box_put_native_t = Int32 Function(Pointer<Void> box, Uint64 id, Poin
 typedef obx_box_put_many_native_t = Int32 Function(
     Pointer<Void> box, Pointer<Uint64> objects, Pointer<Uint64> ids, Int32 mode);
 typedef obx_box_remove_native_t = Int32 Function(Pointer<Void> box, Uint64 id);
+typedef obx_box_remove_all_native_t = Int32 Function(Pointer<Void> box, Pointer<Uint64> removed);
+typedef obx_box_count_native_t = Int32 Function(Pointer<Void> box, Uint64 limit, Pointer<Uint64> _count);
+typedef obx_box_is_empty_native_t = Int32 Function(Pointer<Void> box, Pointer<Uint8> is_empty);

lib/src/box.dart

@@ -166,5 +166,29 @@ class Box<T> {
     return _getMany(() => checkObxPtr(bindings.obx_box_get_all(_cBox), "failed to get all objects from box", true));
   }
 
+  // same as calling maxCount with limit := 0
+  int count() {
+    return maxCount(limit: 0);
+  }
+
+  int maxCount({int limit}) {
+    Pointer<Uint64> _count = Pointer<Uint64>.allocate();
+    checkObx(bindings.obx_box_count(_cBox, limit, _count));
+    return _count.load<int>();
+  }
+
+  bool isEmpty() {
+    Pointer<Uint8> _isEmpty = Pointer<Uint8>.allocate();
+    checkObx(bindings.obx_box_is_empty(_cBox, _isEmpty));
+    return _isEmpty.load<int>() > 0 ? true : false;
+  }
+
+  int removeAll() {
+    Pointer<Uint64> _removedItems = Pointer<Uint64>.allocate();
+    checkObx(bindings.obx_box_remove_all(_cBox, _removedItems));
+    return _removedItems.load<int>();
+  }
+
   get ptr => _cBox;
+
 }

test/box_test.dart

@@ -93,6 +93,18 @@ void main() {
       expect(fetchedItems[2].text, equals("Two"));
     });
 
+    test(".count(), .isEmpty(), .removeAll() works", () {
+      final List<TestEntity> items = ["One", "Two"].map((s) => TestEntity.construct(s)).toList();
+      final List<int> ids = box.putMany(items);
+      
+      int count = box.count();
+      expect(count, greaterThanOrEqualTo(0));
+      bool isEmpty = box.isEmpty();
+      expect(isEmpty, equals(false));
+      int removed = box.removeAll();
+      expect(removed, greaterThan(0));
+    });
+
     tearDown(() {
       if (store != null) store.close();
       store = null;