Merge pull request #467 from appwrite/fix-flutter-dart-file-type

Author: lohanidamodar

templates/dart/lib/src/input_file.dart.twig

@@ -1,21 +1,16 @@
+import 'exception.dart';
+
 class InputFile {
   late final String? path;
   late final List<int>? bytes;
   final String? filename;
   final String? contentType;
 
-  /// Provide a file using path
-  InputFile({required this.path, this.filename, this.contentType}) {
-    bytes = null;
-  }
-
-  InputFile._internal(this.bytes, {this.filename, this.contentType}) {
-    path = null;
-  }
-
-  /// Provide a file using bytes
-  factory InputFile.fromBytes(
-      {required List<int> bytes, String? filename, String? contentType}) {
-    return InputFile._internal(bytes, filename: filename, contentType: contentType);
+  /// Provide a file, use `path` for IO platforms
+  /// and provide `bytes` for web platform
+  InputFile({this.path, this.filename, this.contentType, this.bytes}) {
+    if (path == null && bytes == null) {
+      throw {{ spec.title | caseUcfirst }}Exception('One of `path` or `bytes`  is required');
+    }
   }
 }

templates/flutter/lib/src/input_file.dart.twig

@@ -1,21 +1,19 @@
+import 'package:flutter/foundation.dart';
+import 'exception.dart';
+
 class InputFile {
   late final String? path;
   late final List<int>? bytes;
   final String? filename;
   final String? contentType;
 
-  /// Provide a file using path
-  InputFile({required this.path, this.filename, this.contentType}) {
-    bytes = null;
-  }
-
-  InputFile._internal(this.bytes, {this.filename, this.contentType}) {
-    path = null;
-  }
-
-  /// Provide a file using bytes
-  factory InputFile.fromBytes(
-      {required List<int> bytes, String? filename, String? contentType}) {
-    return InputFile._internal(bytes, filename: filename, contentType: contentType);
+  /// Provide a file, use `path` for IO platforms
+  /// and provide `bytes` for web platform
+  InputFile({this.path, this.filename, this.contentType, this.bytes}) {
+    if (kIsWeb && bytes == null) {
+      throw {{ spec.title | caseUcfirst }}Exception('On web `bytes` is required');
+    } else if(!kIsWeb && path == null && bytes == null) {
+      throw {{ spec.title | caseUcfirst }}Exception('On IO platforms one of `path` or `bytes`  is required');
+    }
   }
 }