doctor_app_flutter/lib/providers/medicine_provider.dart

import 'dart:convert';

import 'package:doctor_app_flutter/client/app_client.dart';
import 'package:doctor_app_flutter/config/config.dart';
import 'package:doctor_app_flutter/config/shared_pref_kay.dart';
import 'package:doctor_app_flutter/models/pharmacies_List_request_model.dart';
import 'package:doctor_app_flutter/models/pharmacies_items_request_model.dart';
import 'package:doctor_app_flutter/util/dr_app_shared_pref.dart';
import 'package:doctor_app_flutter/util/helpers.dart';
import 'package:flutter/cupertino.dart';

class MedicineProvider with ChangeNotifier {
  DrAppSharedPreferances sharedPref = new DrAppSharedPreferances();
  
  var pharmacyItemsList = [];
  var pharmaciesList = [];
  bool isFinished = true;
  bool hasError = false;
  String errorMsg = '';

  PharmaciesItemsRequestModel _itemsRequestModel =PharmaciesItemsRequestModel();
  PharmaciesListRequestModel _listRequestModel = PharmaciesListRequestModel();

  Future<String> getMedicineItem(String itemName) async {
    resetDefaultValues();
    try {
      if (await Helpers.checkConnection()) {
        _itemsRequestModel.phrItemName = itemName;
      
        final response = await AppClient.post(PHARMACY_ITEMS_URL,
            body: json.encode(_itemsRequestModel.toJson()));
        final int statusCode = response.statusCode;
        isFinished = true;
        if (statusCode < 200 || statusCode >= 400 || json == null) {
          isFinished = true;
          hasError = true;
          errorMsg = 'Error While Fetching data';
        } else {
          var parsed = json.decode(response.body.toString());
          if (parsed['MessageStatus'] == 1) {
            pharmacyItemsList = parsed['ListPharmcy_Region'];
            hasError = false;
            isFinished = true;
            errorMsg = "Done";
          } else {
            hasError = true;
            errorMsg = parsed['ErrorMessage'] ?? parsed['ErrorEndUserMessage'];
          }
        }
      } else {
        isFinished = true;
        hasError = true;
        errorMsg = 'Please Check The Internet Connection';
      }
      notifyListeners();
    } catch (error) {
      throw error;
    }

    return errorMsg;
  }

  Future<String> getPharmaciesList(int itemId) async {
    String token = await sharedPref.getString(TOKEN);
    resetDefaultValues();
    try {
      if (await Helpers.checkConnection()) {
        _listRequestModel.itemID = itemId;
        _listRequestModel.tokenID = token;
        final response = await AppClient.post(PHARMACY_LIST_URL,
            body: json.encode(_listRequestModel.toJson()));
        final int statusCode = response.statusCode;
        isFinished = true;
        if (statusCode < 200 || statusCode >= 400 || json == null) {
          isFinished = true;
          hasError = true;
          errorMsg = 'Error While Fetching data';
        } else {
          var parsed = json.decode(response.body.toString());
          if (parsed['MessageStatus'] == 1) {
            pharmaciesList = parsed['PharmList'];
            hasError = false;
            isFinished = true;
            errorMsg = "Done";
          } else {
            hasError = true;
            errorMsg = parsed['ErrorMessage'] ?? parsed['ErrorEndUserMessage'];
          }
        }
      } else {
        isFinished = true;
        hasError = true;
        errorMsg = 'Please Check The Internet Connection';
      }
      notifyListeners();
    } catch (error) {
      throw error;
    }

    return errorMsg;
  }

  resetDefaultValues() {
    isFinished = false;
    hasError = false;
    errorMsg = '';
    notifyListeners();
  }
}