Complete refactoring SFM App Source Code

lib/product/network/network_manager.dart

@@ -0,0 +1,114 @@
+import 'dart:convert';
+import 'dart:developer';
+
+import 'package:sfm_app/product/constant/status_code/status_code_constants.dart';
+
+import '../cache/local_manager.dart';
+import '../constant/app/app_constants.dart';
+import '../constant/enums/local_keys_enums.dart';
+import 'package:http/http.dart' as http;
+
+class NetworkManager {
+  NetworkManager._init();
+  static NetworkManager? _instance;
+  static NetworkManager? get instance => _instance ??= NetworkManager._init();
+
+  Future<Map<String, String>> getHeaders() async {
+    String? token =
+        LocaleManager.instance.getStringValue(PreferencesKeys.TOKEN);
+    Map<String, String> headers = {
+      'Accept': 'application/json',
+      'Content-Type': 'application/json',
+      "Access-Control-Allow-Credentials": "false",
+      "Access-Control-Allow-Headers":
+          "Origin,Content-Type,X-Amz-Date,Authorization,X-Api-Key,X-Amz-Security-Token,locale",
+      'Access-Control-Allow-Origin': "*",
+      'Access-Control-Allow-Methods': 'GET, POST, OPTIONS, PUT, PATCH, DELETE',
+      'Authorization': token,
+    };
+    return headers;
+  }
+
+  /// Retrieves data from the server using a GET request.
+  ///
+  /// [path] is the endpoint for the request. Returns the response body as a
+  /// [String] if the request is successful (status code 200), or an empty
+  /// string if the request fails
+  Future<String> getDataFromServer(String path) async {
+    final url = Uri.https(ApplicationConstants.DOMAIN, path);
+    log("GET url: $url");
+    final headers = await getHeaders();
+    final response = await http.get(url, headers: headers);
+    if (response.statusCode == StatusCodeConstants.OK ||
+        response.statusCode == StatusCodeConstants.CREATED) {
+      return response.body;
+    } else {
+      return "";
+    }
+  }
+
+  /// Sends a GET request to the server with the specified parameters.
+  ///
+  /// This function constructs a URL from the provided [path] and [params],
+  /// then sends an HTTP GET request to the server. If the response has a
+  /// status code of 200, the function returns the response body.
+  /// Otherwise, it returns an empty string.
+  ///
+  /// [path] is the endpoint on the server.
+  /// [params] is a map containing query parameters for the request.
+  ///
+  /// Returns a [Future<String>] containing the server response body.
+  Future<String> getDataFromServerWithParams(
+      String path, Map<String, dynamic> params) async {
+    final url = Uri.https(ApplicationConstants.DOMAIN, path, params);
+    log("GET Params url: $url");
+    final headers = await getHeaders();
+    final response = await http.get(url, headers: headers);
+    if (response.statusCode == StatusCodeConstants.CREATED ||
+        response.statusCode == StatusCodeConstants.OK) {
+      return response.body;
+    } else {
+      return "";
+    }
+  }
+
+  /// Creates new data on the server using a POST request.
+  ///
+  /// [path] is the endpoint for the request, and [body] contains the data
+  /// to be sent. Returns the HTTP status code of the response.
+  Future<int> createDataInServer(String path, Map<String, dynamic> body) async {
+    final url = Uri.https(ApplicationConstants.DOMAIN, path);
+    log("POST url: $url");
+    final headers = await getHeaders();
+    final response =
+        await http.post(url, headers: headers, body: jsonEncode(body));
+    return response.statusCode;
+  }
+
+  /// Updates existing data on the server using a PUT request.
+  ///
+  /// [path] is the endpoint for the request, and [body] contains the data
+  /// to be updated. Returns the HTTP status code of the response.
+  Future<int> updateDataInServer(String path, Map<String, dynamic> body) async {
+    final url = Uri.https(ApplicationConstants.DOMAIN, path);
+    log("PUT url: $url");
+    final headers = await getHeaders();
+    final response =
+        await http.put(url, headers: headers, body: jsonEncode(body));
+    return response.statusCode;
+  }
+
+  /// Deletes data from the server using a DELETE request.
+  ///
+  /// [path] is the endpoint for the request. Returns the HTTP status code
+  /// of the response, indicating the result of the deletion operation.
+  /// A status code of 200 indicates success, while other codes indicate
+  /// failure or an error.
+  Future<int> deleteDataInServer(String path) async {
+    final url = Uri.https(ApplicationConstants.DOMAIN, path);
+    log("DELETE url: $url");
+    final headers = await getHeaders();
+    final response = await http.delete(url, headers: headers);
+    return response.statusCode;
+  }
+}