refactor: make csv-reader generic and mockable

src/Application/Interfaces/IFileReaderService.cs

@@ -0,0 +1,6 @@
+namespace Application.Interfaces;
+
+public interface IFileReaderService
+{
+    List<T> ReadFromFile<T>(string filePath);
+}

src/Application/Services/DomainService/AccountService.cs

@@ -1,5 +1,6 @@
 using Application.DTOs;
 using Application.DTOs.Account;
+using Application.Interfaces;
 using Application.Interfaces.Repositories;
 using Application.Interfaces.Services;
 using Application.Mappers;
@@ -11,17 +12,19 @@ namespace Application.Services.DomainService;
 public class AccountService : IAccountService
 {
     private readonly IAccountRepository _accountRepository;
+    private readonly IFileReaderService _fileReaderService;
 
-    public AccountService(IAccountRepository accountRepository)
+    public AccountService(IAccountRepository accountRepository, IFileReaderService fileReaderService)
     {
         _accountRepository = accountRepository;
+        _fileReaderService = fileReaderService;
     }
 
     public async Task<Result> AddAccountsFromCsvAsync(string filePath)
     {
         try
         {
-            var accountCsvModels = CsvReaderService.ReadFromCsv<AccountCsvModel>(filePath);
+            var accountCsvModels = _fileReaderService.ReadFromFile<AccountCsvModel>(filePath);
 
             var accounts = accountCsvModels
                 .Select(csvModel => csvModel.ToAccount())

src/Application/Services/DomainService/TransactionService.cs

@@ -1,5 +1,6 @@
 using Application.DTOs;
 using Application.DTOs.Transaction;
+using Application.Interfaces;
 using Application.Interfaces.Services;
 using Application.Mappers;
 using Application.Services.SharedService;
@@ -11,15 +12,17 @@ namespace Application.Services.DomainService;
 public class TransactionService : ITransactionService
 {
     private readonly ITransactionRepository _transactionRepository;
+    private readonly IFileReaderService _fileReaderService;
 
-    public TransactionService(ITransactionRepository transactionRepository)
+    public TransactionService(ITransactionRepository transactionRepository, IFileReaderService fileReaderService)
     {
         _transactionRepository = transactionRepository;
+        _fileReaderService = fileReaderService;
     }
 
     public async Task<Result> AddTransactionsFromCsvAsync(string filePath)
     {
-        var transactionCsvModels = CsvReaderService.ReadFromCsv<TransactionCsvModel>(filePath);
+        var transactionCsvModels = _fileReaderService.ReadFromFile<TransactionCsvModel>(filePath);
 
         var transactions = transactionCsvModels
             .Select(csvModel => csvModel.ToTransaction())

src/Application/Services/SharedService/CsvReaderService.cs

@@ -1,12 +1,13 @@
 using System.Globalization;
+using Application.Interfaces;
 using CsvHelper;
 using CsvHelper.Configuration;
 
 namespace Application.Services.SharedService;
 
-public static class CsvReaderService
+public class CsvReaderService : IFileReaderService
 {
-    public static List<T> ReadFromCsv<T>(string filePath)
+    public List<T> ReadFromFile<T>(string filePath)
     {
         using var reader = new StreamReader(filePath);
         using var csv = new CsvReader(reader, new CsvConfiguration(CultureInfo.InvariantCulture)

src/Web/Startup/ServiceExtensions.DI.cs

@@ -2,6 +2,7 @@
 using Application.Interfaces.Repositories;
 using Application.Interfaces.Services;
 using Application.Services.DomainService;
+using Application.Services.SharedService;
 using Infrastructure.Repositories;
 using Web.Services;
 
@@ -12,6 +13,7 @@ public static partial class ServiceExtensions
     public static void AddApplicationServices(this IServiceCollection services)
     {
         services.AddScoped<ITokenService, TokenService>();
+        services.AddScoped<IFileReaderService, CsvReaderService>();
         services.AddScoped<IRoleManagerRepository, RoleManagerRepository>();
         services.AddScoped<IUserManagerRepository, UserManagerRepository>();
         services.AddScoped<IUserService, UserService>();