import 'dart:convert'; import 'package:flutter/cupertino.dart'; import 'package:http/http.dart'; import 'package:test_sa/controllers/api_routes/api_manager.dart'; import 'package:test_sa/controllers/api_routes/urls.dart'; import 'package:test_sa/models/gas_refill/gas_refill_model.dart'; import 'package:test_sa/models/user.dart'; class GasRefillProvider extends ChangeNotifier { // number of items call in each request final pageItemNumber = 12; //reset provider data void reset() { items = null; nextPage = true; stateCode = null; } // state code of current request to defied error message // like 400 customer request failed // 500 service not available int stateCode; // true if there is next page in product list and false if not bool nextPage = true; // list of user requests List items; // when requests in-process _loading = true // done _loading = true // failed _loading = false bool isLoading; /// return -2 if request in progress /// return -1 if error happen when sending request /// return state code if request complete may be 200, 404 or 403 /// for more details check http state manager /// lib\controllers\http_status_manger\http_status_manger.dart Future getRequests({ @required String host, @required User user, }) async { if (isLoading == true) return -2; isLoading = true; Response response; Map body = {}; body["pageNumber"] = (items?.length ?? 0) ~/ pageItemNumber + 1; body["pageSize"] = pageItemNumber; print("url:${ URLs.getGasRefill}:body:$body"); response = await ApiManager.instance.post( URLs.getGasRefill, body: body, ); stateCode = response.statusCode; if (stateCode >= 200 && stateCode < 300) { // client's request was successfully received List requestsListJson = json.decode(response.body)["data"]; List itemsPage = requestsListJson.map((request) => GasRefillModel.fromJson(request)).toList(); items ??= []; items.addAll(itemsPage); if (itemsPage.length == pageItemNumber) { nextPage = true; } else { nextPage = false; } } try { isLoading = false; notifyListeners(); return response.statusCode; } catch (error) { isLoading = false; stateCode = -1; notifyListeners(); return -1; } } Future createModel({ @required String host, @required User user, @required GasRefillModel model, }) async { Map body = { "uid": user.id.toString(), "token": user.token ?? "", "GazRefillNo": "GR-${DateTime.now().toString().split(" ").first}", "status": model.status.toMap(), }; body["gazRefillDetails"] = model.details .map((model) => { "gasType": model.type.toMap(), "cylinderSize": model.cylinderSize.toMap(), "cylinderType": model.cylinderType.toMap(), "requestedQty": model.requestedQuantity, }) .toList(); Response response; try { response = await ApiManager.instance.post(URLs.requestGasRefill, body: body); stateCode = response.statusCode; if (response.statusCode >= 200 && response.statusCode < 300) { if (items != null) { reset(); notifyListeners(); } } return response.statusCode; } catch (error) { return -1; } } Future updateModel({ @required String host, @required User user, @required GasRefillModel oldModel, @required GasRefillModel newModel, }) async { Map body = { "id": newModel.id, "gazRefillNo": newModel.title ?? "", "status": newModel.status.toMap(), }; body["gazRefillDetails"] = newModel.details .map((model) => { "gasType": model.type.toMap(), "cylinderSize": model.cylinderSize.toMap(), "cylinderType": model.cylinderType.toMap(), "requestedQty": model.requestedQuantity, "deliverdQty": model.deliveredQuantity, }) .toList(); Response response; try { response = await ApiManager.instance.put(URLs.updateGasRefill, body: body); // response = await post( // Uri.parse("$host${URLs.updateGasRefill}/${newModel.id}"), // body: body, // ); stateCode = response.statusCode; if (response.statusCode >= 200 && response.statusCode < 300) { oldModel.fromGasRefillModel(newModel); notifyListeners(); } return response.statusCode; } catch (error) { return -1; } } }