implemented max size for uploading images

lib/AddPage.dart

@@ -30,16 +30,30 @@ class _AddScreenState extends State<AddScreen> {
     _selectedIndex = widget.initialIndex;
   }
 
+  Future<bool> isFileSizeValid(File file, int maxSizeInMB) async {
+    final fileSize = await file.length();
+    final maxSizeInBytes = maxSizeInMB * 1024 * 1024;
+    return fileSize <= maxSizeInBytes;
+  }
 
   Future<void> _getImage(ImageSource source) async {
     final pickedFile = await ImagePicker().pickImage(source: source);
 
     if (pickedFile != null) {
+      final tempFile = File(pickedFile.path);
+      final bool isValid = await isFileSizeValid(tempFile, 10);
+      if (isValid) {
         setState(() {
-        _imageFile = File(pickedFile.path);
+          _imageFile = tempFile;
         });
+      } else {
+        ScaffoldMessenger.of(context).showSnackBar(
+          const SnackBar(content: Text('Die Dateigröße darf maximal 10 MB betragen.')),
+        );
       }
     }
+  }
+
   Future<void> addNewElementToFirestore(String title, String description, File imageFile) async {
     String collectionName;
     if (_selectedIndex == 0) {

pubspec.lock

@@ -9,6 +9,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.1.1"
+  archive:
+    dependency: transitive
+    description:
+      name: archive
+      sha256: "0c8368c9b3f0abbc193b9d6133649a614204b528982bebc7026372d61677ce3a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.3.7"
   async:
     dependency: transitive
     description:
@@ -105,6 +113,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.17.0"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      sha256: "0f08b14755d163f6e2134cb58222dd25ea2a2ee8a195e53983d57c075324d592"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.1"
   cross_file:
     dependency: transitive
     description:
@@ -288,6 +304,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "4.0.2"
+  image:
+    dependency: "direct main"
+    description:
+      name: image
+      sha256: "73964e3609fb96e01e69b0924b939967c556e46c7ff05db2ea9e31019000f4ef"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.16"
   image_picker:
     dependency: "direct main"
     description:
@@ -448,6 +472,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.11.1"
+  petitparser:
+    dependency: transitive
+    description:
+      name: petitparser
+      sha256: "49392a45ced973e8d94a85fdb21293fbb40ba805fc49f2965101ae748a3683b4"
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.1.0"
   platform:
     dependency: transitive
     description:
@@ -464,6 +496,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.4"
+  pointycastle:
+    dependency: transitive
+    description:
+      name: pointycastle
+      sha256: "7c1e5f0d23c9016c5bbd8b1473d0d3fb3fc851b876046039509e18e0c7485f2c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.7.3"
   process:
     dependency: transitive
     description:
@@ -597,6 +637,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.0.0"
+  xml:
+    dependency: transitive
+    description:
+      name: xml
+      sha256: "979ee37d622dec6365e2efa4d906c37470995871fe9ae080d967e192d88286b5"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.2.2"
 sdks:
   dart: ">=2.19.0 <3.0.0"
   flutter: ">=3.3.0"

pubspec.yaml

@@ -46,6 +46,7 @@ dependencies:
   cloud_firestore: ^4.5.1
   change_app_package_name: ^1.1.0
   cached_network_image: ^3.2.3
+  image: ^4.0.16
 
 
 dev_dependencies: