Move CupertinoLoadingWidget to core module

Signed-off-by: dab246 <tdvu@linagora.com>
(cherry picked from commit 2091224f5e55587af2b4c901299673cd0387d15a)

core/lib/core.dart

@@ -84,6 +84,7 @@ export 'presentation/views/checkbox/labeled_checkbox.dart';
 export 'presentation/views/container/tmail_container_widget.dart';
 export 'presentation/views/clipper/side_arrow_clipper.dart';
 export 'presentation/views/avatar/gradient_circle_avatar_icon.dart';
+export 'presentation/views/loading/cupertino_loading_widget.dart';
 
 // Resources
 export 'presentation/resources/assets_paths.dart';

core/lib/presentation/views/loading/cupertino_loading_widget.dart

@@ -0,0 +1,45 @@
+import 'package:core/presentation/views/loading/cupertino_loading_widget_styles.dart';
+import 'package:flutter/cupertino.dart';
+
+class CupertinoLoadingWidget extends StatelessWidget {
+
+  final double? size;
+  final EdgeInsetsGeometry? padding;
+  final bool isCenter;
+
+  const CupertinoLoadingWidget({
+    super.key,
+    this.size,
+    this.padding,
+    this.isCenter = true,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final item = isCenter
+      ? Center(
+          child: SizedBox(
+            width: size ?? CupertinoLoadingWidgetStyles.size,
+            height: size ?? CupertinoLoadingWidgetStyles.size,
+            child: const CupertinoActivityIndicator(
+              color: CupertinoLoadingWidgetStyles.progressColor
+            )
+          )
+        )
+      : Align(
+          alignment: AlignmentDirectional.topCenter,
+          child: SizedBox(
+            width: size ?? CupertinoLoadingWidgetStyles.size,
+            height: size ?? CupertinoLoadingWidgetStyles.size,
+            child: const CupertinoActivityIndicator(
+              color: CupertinoLoadingWidgetStyles.progressColor
+            )
+          ),
+        );
+    if (padding != null) {
+      return Padding(padding: padding!, child: item);
+    } else {
+      return item;
+    }
+  }
+}

core/lib/presentation/views/loading/cupertino_loading_widget_styles.dart

@@ -0,0 +1,7 @@
+import 'package:core/presentation/extensions/color_extension.dart';
+import 'package:flutter/material.dart';
+
+class CupertinoLoadingWidgetStyles {
+  static const Color progressColor = AppColor.colorLoading;
+  static const double size = 24;
+}