aman-kassa-flutter/lib/core/services/BankService.dart

import 'dart:convert';
import 'package:aman_kassa_flutter/core/base/base_service.dart';
import 'package:aman_kassa_flutter/core/models/aman_dao.dart';
import 'package:aman_kassa_flutter/core/models/close_day_data.dart';
import 'package:aman_kassa_flutter/core/models/transaction_item.dart';
import 'package:flutter/services.dart';
import 'package:intl/intl.dart';

class BankService extends BaseService {
  static const String _url = 'http://195.200.74.83:5000';
  final MethodChannel _channel = MethodChannel('channel:com.amanKassa/bank');


  Future<int> version() async {
    String result;
    try {
      result = await _channel.invokeMethod('version');
    } catch (e, stack) {
      log.e("BankService", e, stack);
      result = '0';
    }
    log.i(result);
    return int.parse(result) ?? 0;
  }

  Future<String> imei() async {
    String result;
    try {
      result = await _channel.invokeMethod('imei');
    } catch (e, stack) {
      log.e("BankService", e, stack);
      result = '0';
    }
    log.i(result);
    return result;
  }

  Future<bool> init() async {
    try {
      String response = await _channel.invokeMethod('init', <String, dynamic>{
        'serverUrl': _url,
      });
      AmanDao dao = AmanDao.fromJson(json.decode(response));
      log.i('${dao.success} - ${dao.msg}');
      return dao.success;
    } catch (e, stack) {
      log.e("BankService", e, stack);
      return false;
    }
  }

  Future<bool> connect() async {
    try {
      String response = await _channel.invokeMethod("connection");
      AmanDao dao = AmanDao.fromJson(json.decode(response));
      log.i('${dao.success} - ${dao.msg}');
      return dao.success;
    } catch (e, stack) {
      log.e("BankService", e, stack);
      return false;
    }
  }

  Future<bool> currency() async {
    try {
      String response = await _channel.invokeMethod("currency");
      AmanDao dao = AmanDao.fromJson(json.decode(response));
      log.i('${dao.success} - ${dao.msg}');
      return dao.success;
    } catch (e, stack) {
      log.e("BankService", e, stack);
      return false;
    }
  }

  Future<bool> permissions() async {
    try {
      String response = await _channel.invokeMethod("permissions");
      AmanDao dao = AmanDao.fromJson(json.decode(response));
      log.i('${dao.success} - ${dao.msg}');
      return dao.success;
    } catch (e, stack) {
      log.e("BankService", e, stack);
      return false;
    }
  }

  Future<AmanDao> auth({String login, String password}) async {
    try {
      String response = await _channel.invokeMethod("auth",
          <String, dynamic>{'login': login, 'password': password});
      AmanDao dao = AmanDao.fromJson(json.decode(response));
      log.i('${dao.success} - ${dao.msg}');
      return dao;
    } catch (e, stack) {
      log.e("BankService", e, stack);
      return new AmanDao(msg: 'Ошибка авторизации');
    }
  }

  Future<AmanDao> closeDay() async {
    try {
      String response = await _channel.invokeMethod("closeDay");
      AmanDao dao = AmanDao.fromJson(json.decode(response));
      log.i('${dao.success} - ${dao.msg}');
      return dao;
    } catch (e, stack) {
      log.e("BankService", e, stack);
      return new AmanDao(msg: 'Ошибка при закрытии дня');
    }
  }

  Future<AmanDao> pay({double amount}) async {
    try {

      double total = amount * 100;
      log.i('total: $total, ${total.toInt()}');
      String response = await _channel.invokeMethod("pay", <String, dynamic>{'amount': total.toInt()});
      AmanDao dao = AmanDao.fromJson(json.decode(response));
      log.i('${dao.success} - ${dao.msg}');
      return dao;
    } catch (e, stack) {
      log.e("BankService", e, stack);
      return new AmanDao(msg: 'Ошибка оплаты');
    }
  }

  Future<AmanDao> findTransaction({int transactionNumber, String authorizationCode}) async {
    try {
      log.i('transactionNumber: $transactionNumber');
      String response = await _channel.invokeMethod("findTransaction", <String, dynamic>{'transactionNumber': transactionNumber, 'authorizationCode': authorizationCode});
      AmanDao dao = AmanDao.fromJson(json.decode(response));
      log.i('${dao.success} - ${dao.msg}');
      return dao;
    } catch (e, stack) {
      log.e("BankService", e, stack);
      return new AmanDao(msg: 'Ошибка при поиске транзакии банка');
    }
  }

  Future<AmanDao> refund() async {
    try {
      String response = await _channel.invokeMethod("refund");
      AmanDao dao = AmanDao.fromJson(json.decode(response));
      log.i('${dao.success} - ${dao.msg}');
      return dao;
    } catch (e, stack) {
      log.e("BankService", e, stack);
      return new AmanDao(msg: 'Ошибка при возврате');
    }
  }

  Future<bool> shutdown() async {
    try {
      String response = await _channel.invokeMethod("shutdown");
      AmanDao dao = AmanDao.fromJson(json.decode(response));
      log.i('${dao.success} - ${dao.msg}');
      return dao.success;
    } catch (e, stack) {
      log.e("BankService", e, stack);
      return false;
    }
  }

  Future<bool> cancel() async {
    try {
      String response = await _channel.invokeMethod("cancel");
      AmanDao dao = AmanDao.fromJson(json.decode(response));
      log.i('${dao.success} - ${dao.msg}');
      return dao.success;
    } catch (e, stack) {
      log.e("BankService", e, stack);
      return false;
    }
  }

  CloseDayData closeDayDataConvert(dynamic rows) {
    final DateFormat formatter = DateFormat('dd.MM.yyyy');
    final DateTime now = DateTime.now();
    final String formatted = formatter.format(now);
    List<TransactionItem> items = (rows as List).map((e) => TransactionItem.fromJson(e)).toList();
    num totalAmount = 0;
    int totalCount = 0;
    num paymentAmount = 0;
    int paymentCount = 0;
    num refundAmount = 0;
    int refundCount = 0;

    for(TransactionItem item in items) {
      if(item.transactionType == 'PAYMENT') {
        paymentCount++;
        paymentAmount += ( item.amount / 100 );
        totalAmount += ( item.amount / 100 );
      } else if(item.transactionType == 'REFUND') {
        refundCount++;
        refundAmount += ( item.amount / 100 );
        totalAmount -= ( item.amount / 100 );
      }
      totalCount++;
    }

    CloseDayData closeDayData = new CloseDayData(
        items: items,
        title: 'Отчет POS от $formatted',
        totalAmount: totalAmount, totalCount: totalCount,
        paymentAmount: paymentAmount, paymentCount: paymentCount,
        refundAmount: refundAmount, refundCount: refundCount,
    );
    return closeDayData;
  }

}