73 lines
2.5 KiB
C#
73 lines
2.5 KiB
C#
using System.Text;
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using AutoMapper;
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using MediatR;
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using Newtonsoft.Json;
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using Newtonsoft.Json.Serialization;
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using ExpenseTracker.Application.Common.Interfaces.Repositories;
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using ExpenseTracker.Application.Common.Interfaces.Services;
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using ExpenseTracker.Domain.Entities;
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using ExpenseTracker.Domain.Enums;
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namespace ExpenseTracker.Application.Accounts.Queries.Export.Json.Many;
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public class ExportJsonAccountsQueryHandler : IRequestHandler<ExportJsonAccountsQuery, byte[]>
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{
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private readonly IMapper _mapper;
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private readonly ISessionUserService _sessionUserService;
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private readonly IAccountRepository _accountRepository;
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private readonly ITransactionRepository _transactionRepository;
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public ExportJsonAccountsQueryHandler(
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IMapper mapper,
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ISessionUserService sessionUserService,
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IAccountRepository repository,
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ITransactionRepository transactionRepository)
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{
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_mapper = mapper;
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_sessionUserService = sessionUserService;
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_accountRepository = repository;
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_transactionRepository = transactionRepository;
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}
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public async Task<byte[]> Handle(ExportJsonAccountsQuery request, CancellationToken cancellationToken)
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{
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var entities = _accountRepository.Queryable
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.Where(e => e.UserId == _sessionUserService.Id)
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.GroupJoin(
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_transactionRepository.Queryable,
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b => b.Id,
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t => t.AccountId,
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(account, transactions) =>
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new Account
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{
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Id = account.Id,
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Name = account.Name,
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Description = account.Description,
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Currency = account.Currency,
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UserId = account.UserId,
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Transactions = transactions
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}
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)
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.ToArray();
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var entityDtos = _mapper.ProjectTo<AccountJsonDto>(entities.AsQueryable());
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var jsonSerializerSettings = new JsonSerializerSettings()
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{
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ContractResolver = new CamelCasePropertyNamesContractResolver()
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};
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var json = JsonConvert.SerializeObject(entityDtos, jsonSerializerSettings);
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using (var memoryStream = new MemoryStream())
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{
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using (var streamWriter = new StreamWriter(memoryStream, Encoding.UTF8))
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{
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await streamWriter.WriteAsync(json);
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await streamWriter.FlushAsync();
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}
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return memoryStream.ToArray();
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}
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}
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}
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