84 lines
2.7 KiB
Dart
84 lines
2.7 KiB
Dart
import 'package:http/http.dart' as http;
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import 'dart:convert';
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import '../auth_manager.dart'; // 確保引入 AuthManager
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// 共用 API 常數
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const String BASE_IP = "https://api.gex.com.tw:8033";
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const String COMMON_API_ENDPOINT = "xapi/v2/eis_demo/orm_api_v2/3/";
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const String COMMON_API_URL = "$BASE_IP/$COMMON_API_ENDPOINT";
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class GenericApiService {
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/// 通用的獲取列表方法
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/// [T] : 目標資料模型 (例如 Announcement 或 Todo)
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/// [tableName] : 資料庫表名 (API 參數)
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/// [pk] : 主鍵欄位名稱 (API 參數)
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/// [queryFilter] : 查詢過濾條件 (API 參數)
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/// [fromJson] : 將 Map 轉換為物件的工廠方法 (例如 Announcement.fromJson)
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Future<List<T>> fetchList<T>({
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required String tableName,
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required String pk,
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required String queryFilter,
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required T Function(Map<String, dynamic>) fromJson,
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Map<String, String>? additionalParams, // 允許傳入額外參數 (如分頁)
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}) async {
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// 1. 讀取 Token
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String? token = await AuthManager.getToken();
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if (token == null) {
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print("錯誤：未找到登入 Token");
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// 根據需求決定是否拋出錯誤或回傳空陣列
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throw Exception('未登入');
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}
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// 2. 建立 API 參數
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final Map<String, String> params = {
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"token": token,
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"_\$_tableName": tableName,
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"_\$_pk": pk,
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"_\$_action": "P",
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"_\$_query_filter": queryFilter,
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};
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// 如果有額外參數，合併進去
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if (additionalParams != null) {
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params.addAll(additionalParams);
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}
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try {
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final response = await http.post(
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Uri.parse(COMMON_API_URL),
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headers: {
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'Content-Type': 'application/x-www-form-urlencoded',
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},
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body: params,
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);
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if (response.statusCode == 200) {
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final Map<String, dynamic> responseData = json.decode(response.body);
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// 檢查 code
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if (responseData['code'] == 0) {
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final dynamic dataObject = responseData['data'];
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// 檢查結構是否正確 (data -> items List)
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if (dataObject is Map && dataObject['items'] is List) {
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List<dynamic> listJson = dataObject['items'];
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// 核心魔法：使用傳入的 fromJson 函數將資料轉換為 T 類型
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return listJson.map((json) => fromJson(json as Map<String, dynamic>)).toList();
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} else {
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return []; // 結構不符或無資料
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}
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} else {
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throw Exception(responseData['msg'] ?? 'API 邏輯錯誤');
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}
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} else {
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throw Exception('HTTP 錯誤: ${response.statusCode}');
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}
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} catch (e) {
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print('API 請求錯誤 ($tableName): $e');
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throw Exception('無法載入資料: $e');
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}
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}
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} |