feat(file-upload): implemented file service functions (#91)

* fix(file-upload): implement static functions

* fix(file-upload): formatting code

* fix(file-upload): adding docs

* fix(file-upload): passing required correct parameter

* fix(file-upload): document handled extensions

* fix(file-upload): minor changes

* fix(file-upload): removed obvious comment

lib/src/modules/common/file_upload/file_uploader.dart

@@ -0,0 +1,45 @@
+import 'package:fa_flutter_core/fa_flutter_core.dart';
+import 'package:file_picker/file_picker.dart';
+import 'package:open_file/src/platform/open_file.dart';
+
+class FileService {
+  FileService._();
+
+  /// Return the Clicked Image
+  static Future<PlatformFile?> pickImage(
+      ImageSource source, String? name) async {
+    final pickedFile = await ImagePicker().pickImage(source: source);
+
+    if (pickedFile != null) {
+      return PlatformFile(
+        name: name ?? pickedFile.name,
+        size: await pickedFile.length(),
+        path: pickedFile.path,
+      );
+    }
+    return null;
+  }
+
+  /// Return the Picked File from the System
+  /// handled extensions are [pdf, jpeg, jpg, png]
+  /// We can add more via [extension] parameter
+  static Future<PlatformFile?> pickDocument(List<String>? extensions) async {
+    FilePickerResult? result = await FilePicker.platform.pickFiles(
+      type: FileType.custom,
+      allowedExtensions: extensions ??
+          [
+            'pdf',
+            'jpg',
+            'jpeg',
+            'png',
+          ],
+    );
+    if (result != null) return result.files.first;
+    return null;
+  }
+
+  /// Open the DOC
+  static void openFile(String path) {
+    OpenFile.open(path);
+  }
+}

pubspec.lock

@@ -397,6 +397,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "7.0.0"
+  file_picker:
+    dependency: "direct main"
+    description:
+      name: file_picker
+      sha256: "2ca051989f69d1b2ca012b2cf3ccf78c70d40144f0861ff2c063493f7c8c3d45"
+      url: "https://pub.dev"
+    source: hosted
+    version: "8.0.5"
   file_selector_linux:
     dependency: transitive
     description:
@@ -1092,6 +1100,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.0.0"
+  open_file:
+    dependency: "direct main"
+    description:
+      name: open_file
+      sha256: a5a32d44acb7c899987d0999e1e3cbb0a0f1adebbf41ac813ec6d2d8faa0af20
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.3.2"
   package_config:
     dependency: transitive
     description:

pubspec.yaml

@@ -14,6 +14,8 @@ dependencies:
   qr_code_scanner: ^1.0.1
   speech_to_text: ^6.6.0
   flutter_tts: ^4.0.2
+  file_picker: ^8.0.0+1
+  open_file: ^3.3.2
 
   # Core
   fa_flutter_core: