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feat(*.cs & *.xaml): Add debt management feature with store, viewmodel, and UI
Introduces a new debt management system including DebtStore and IDebtStore for handling debts, offers, and related API calls. Updates DashboardViewModel and DebtViewModel to use the new store, adds a NullToVisibilityInverseConverter, and updates DashboardView and DebtView to display active debts and pending offers. Implements a debt carousel on the dashboard and refactors debt-related logic out of DebtViewModel into the store for better separation of concerns.
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lines changed

8 files changed

+352
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lines changed

‎FinTrack/App.xaml.cs‎

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@@ -5,6 +5,7 @@
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using FinTrackForWindows.Services.Api;
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using FinTrackForWindows.Services.Budgets;
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using FinTrackForWindows.Services.Currencies;
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using FinTrackForWindows.Services.Debts;
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using FinTrackForWindows.Services.Memberships;
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using FinTrackForWindows.Services.Transactions;
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using FinTrackForWindows.ViewModels;
@@ -85,6 +86,7 @@ private void ConfigureServices(IServiceCollection services)
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services.AddSingleton<ITransactionStore, TransactionStore>();
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services.AddSingleton<ICurrenciesStore, CurrenciesStore>();
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services.AddSingleton<IMembershipStore, MembershipStore>();
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services.AddSingleton<IDebtStore, DebtStore>();
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}
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protected override async void OnStartup(StartupEventArgs e)

‎FinTrack/Helpers/NullToVisibilityInverseConverter.cs‎

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using System.Globalization;
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using System.Windows;
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using System.Windows.Data;
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namespace FinTrackForWindows.Helpers
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{
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public class NullToVisibilityInverseConverter : IValueConverter
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{
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public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
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{
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return value == null ? Visibility.Visible : Visibility.Collapsed;
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}
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public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
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{
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throw new NotImplementedException();
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}
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}
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}

‎FinTrack/Services/Debts/DebtStore.cs‎

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using CommunityToolkit.Mvvm.ComponentModel;
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using FinTrackForWindows.Core;
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using FinTrackForWindows.Dtos.DebtDtos;
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using FinTrackForWindows.Enums;
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using FinTrackForWindows.Models.Debt;
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using FinTrackForWindows.Services.Api;
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using Microsoft.Extensions.Logging;
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using System.Collections.ObjectModel;
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using System.IdentityModel.Tokens.Jwt;
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using System.Security.Claims;
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namespace FinTrackForWindows.Services.Debts
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{
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public partial class DebtStore : ObservableObject, IDebtStore
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{
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private readonly IApiService _apiService;
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private readonly ILogger<DebtStore> _logger;
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private readonly int _currentUserId;
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[ObservableProperty]
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private bool _isLoading;
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private readonly ObservableCollection<DebtModel> _pendingOffers;
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public ReadOnlyObservableCollection<DebtModel> PendingOffers { get; }
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private readonly ObservableCollection<DebtModel> _myDebtsList;
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public ReadOnlyObservableCollection<DebtModel> MyDebtsList { get; }
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private readonly ObservableCollection<DebtModel> _activeDebts;
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public ReadOnlyObservableCollection<DebtModel> ActiveDebts { get; }
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public event Action? DebtsChanged;
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public DebtStore(IApiService apiService, ILogger<DebtStore> logger)
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{
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_apiService = apiService;
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_logger = logger;
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_activeDebts = new ObservableCollection<DebtModel>();
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ActiveDebts = new ReadOnlyObservableCollection<DebtModel>(_activeDebts);
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var handler = new JwtSecurityTokenHandler();
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var jsonToken = handler.ReadJwtToken(SessionManager.CurrentToken);
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_currentUserId = Convert.ToInt32(jsonToken.Claims.FirstOrDefault(claim => claim.Type == ClaimTypes.NameIdentifier)?.Value);
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_pendingOffers = new ObservableCollection<DebtModel>();
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PendingOffers = new ReadOnlyObservableCollection<DebtModel>(_pendingOffers);
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_myDebtsList = new ObservableCollection<DebtModel>();
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MyDebtsList = new ReadOnlyObservableCollection<DebtModel>(_myDebtsList);
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}
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public async Task LoadDebtsAsync()
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{
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IsLoading = true;
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_logger.LogInformation("Loading debt data from API...");
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try
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{
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var debtDtos = await _apiService.GetAsync<List<DebtDto>>("Debt");
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if (debtDtos == null) return;
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_pendingOffers.Clear();
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_myDebtsList.Clear();
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_activeDebts.Clear();
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foreach (var dto in debtDtos)
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{
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var debtModel = new DebtModel
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{
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Id = dto.Id,
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LenderId = dto.LenderId,
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BorrowerId = dto.BorrowerId,
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CurrentUserId = _currentUserId,
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LenderName = dto.LenderName,
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BorrowerName = dto.BorrowerName,
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borrowerImageUrl = dto.BorrowerProfilePicture ?? "/Assets/Images/Icons/user-red.png",
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lenderImageUrl = dto.LenderProfilePicture ?? "/Assets/Images/Icons/user-green.png",
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Amount = dto.Amount,
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DueDate = dto.DueDateUtc.ToLocalTime(),
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Status = dto.Status
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};
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if (dto.Status == DebtStatusType.PendingBorrowerAcceptance && dto.BorrowerId == _currentUserId)
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{
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_pendingOffers.Add(debtModel);
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}
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else
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{
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_myDebtsList.Add(debtModel);
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}
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if (dto.Status == DebtStatusType.Active)
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{
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_activeDebts.Add(debtModel);
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}
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}
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DebtsChanged?.Invoke();
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_logger.LogInformation("Successfully loaded and processed {Count} debts.", debtDtos.Count);
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "Failed to load debt data.");
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}
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finally
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{
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IsLoading = false;
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}
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}
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public async Task SendOfferAsync(string borrowerEmail, decimal amount, string currency, DateTime dueDate, string description)
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{
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IsLoading = true;
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try
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{
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var createDto = new CreateDebtOfferRequestDto
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{
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BorrowerEmail = borrowerEmail,
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Amount = amount,
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CurrencyCode = BaseCurrencyType.TRY,
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DueDateUtc = dueDate.ToUniversalTime(),
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Description = description
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};
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_logger.LogInformation("Sending new debt offer to API...");
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await _apiService.PostAsync<object>("Debt/create-debt-offer", createDto);
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await LoadDebtsAsync();
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_logger.LogInformation("Debt offer sent successfully.");
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "Failed to send debt offer.");
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throw;
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}
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finally
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{
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IsLoading = false;
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}
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}
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public async Task RespondToOfferAsync(DebtModel debt, bool accepted)
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{
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IsLoading = true;
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try
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{
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_logger.LogInformation("Responding to offer for DebtId: {DebtId} with decision: {Decision}", debt.Id, accepted);
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var requestBody = new { Accepted = accepted };
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await _apiService.PostAsync<bool>($"Debt/respond-to-offer/{debt.Id}", requestBody);
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await LoadDebtsAsync();
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_logger.LogInformation("Successfully responded to offer for DebtId: {DebtId}", debt.Id);
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "Failed to respond to debt offer for DebtId: {DebtId}", debt.Id);
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throw;
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}
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finally
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{
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IsLoading = false;
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}
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}
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public async Task UploadVideoAsync(DebtModel debt, string filePath)
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{
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IsLoading = true;
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try
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{
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_logger.LogInformation("Uploading video for DebtId: {DebtId}", debt.Id);
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await _apiService.UploadFileAsync($"Videos/user-upload-video?debtId={debt.Id}", filePath);
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await LoadDebtsAsync();
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_logger.LogInformation("Video uploaded successfully for DebtId: {DebtId}", debt.Id);
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "Failed to upload video for DebtId: {DebtId}", debt.Id);
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throw;
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}
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finally
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{
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IsLoading = false;
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}
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}
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}
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}

‎FinTrack/Services/Debts/IDebtStore.cs‎

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using FinTrackForWindows.Models.Debt;
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using System.Collections.ObjectModel;
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namespace FinTrackForWindows.Services.Debts
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{
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public interface IDebtStore
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{
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ReadOnlyObservableCollection<DebtModel> PendingOffers { get; }
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ReadOnlyObservableCollection<DebtModel> MyDebtsList { get; }
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ReadOnlyObservableCollection<DebtModel> ActiveDebts { get; }
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bool IsLoading { get; }
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Task LoadDebtsAsync();
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Task SendOfferAsync(string borrowerEmail, decimal amount, string currency, DateTime dueDate, string description);
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Task RespondToOfferAsync(DebtModel debt, bool accepted);
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Task UploadVideoAsync(DebtModel debt, string filePath);
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event Action DebtsChanged;
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}
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}

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