Chris Chen
94 lines
3.9 KiB
C#
94 lines
3.9 KiB
C#
using System.Security.Claims;
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using Microsoft.EntityFrameworkCore;
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using ROLAC.API.Data;
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using ROLAC.API.DTOs.Expense;
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using ROLAC.API.Entities;
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namespace ROLAC.API.Services;
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public class MonthlyStatementService : IMonthlyStatementService
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{
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private readonly AppDbContext _db;
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private readonly IHttpContextAccessor _http;
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public MonthlyStatementService(AppDbContext db, IHttpContextAccessor http) { _db = db; _http = http; }
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private string CurrentUserId =>
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_http.HttpContext?.User.FindFirstValue(ClaimTypes.NameIdentifier) ?? "system";
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public async Task<List<MonthlyStatementDto>> GetAllAsync(int? year)
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{
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var query = _db.MonthlyStatements.AsNoTracking().AsQueryable();
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if (year.HasValue) query = query.Where(s => s.Year == year.Value);
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var list = await query.OrderByDescending(s => s.Year).ThenByDescending(s => s.Month).ToListAsync();
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return list.Select(Map).ToList();
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}
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public async Task<MonthlyStatementDto?> GetByIdAsync(int id)
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{
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var s = await _db.MonthlyStatements.AsNoTracking().FirstOrDefaultAsync(x => x.Id == id);
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return s is null ? null : Map(s);
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}
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public async Task<int> CreateAsync(CreateMonthlyStatementRequest r)
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{
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if (await _db.MonthlyStatements.AnyAsync(s => s.Year == r.Year && s.Month == r.Month))
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throw new InvalidOperationException($"A statement for {r.Year}-{r.Month:D2} already exists.");
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var s = new MonthlyStatement
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{
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Year = r.Year, Month = r.Month,
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OpeningBalance = r.OpeningBalance, TotalOtherIncome = r.TotalOtherIncome,
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BankStatementBalance = r.BankStatementBalance, Notes = r.Notes,
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};
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await RecomputeAsync(s);
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_db.MonthlyStatements.Add(s);
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await _db.SaveChangesAsync();
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return s.Id;
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}
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public async Task UpdateAsync(int id, UpdateMonthlyStatementRequest r)
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{
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var s = await _db.MonthlyStatements.FindAsync(id)
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?? throw new KeyNotFoundException($"MonthlyStatement {id} not found.");
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if (s.IsFinalized) throw new InvalidOperationException("Statement is finalized and cannot be modified.");
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s.OpeningBalance = r.OpeningBalance; s.TotalOtherIncome = r.TotalOtherIncome;
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s.BankStatementBalance = r.BankStatementBalance; s.Notes = r.Notes;
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await RecomputeAsync(s);
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await _db.SaveChangesAsync();
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}
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public async Task FinalizeAsync(int id)
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{
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var s = await _db.MonthlyStatements.FindAsync(id)
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?? throw new KeyNotFoundException($"MonthlyStatement {id} not found.");
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s.IsFinalized = true; s.FinalizedAt = DateTimeOffset.UtcNow; s.FinalizedBy = CurrentUserId;
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await _db.SaveChangesAsync();
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}
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private async Task RecomputeAsync(MonthlyStatement s)
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{
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var first = new DateOnly(s.Year, s.Month, 1);
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var next = first.AddMonths(1);
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s.TotalGiving = await _db.Givings
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.Where(g => g.GivingDate >= first && g.GivingDate < next)
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.SumAsync(g => (decimal?)g.Amount) ?? 0m;
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s.TotalExpenses = await _db.Expenses
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.Where(e => e.Status == "Paid" && e.ExpenseDate >= first && e.ExpenseDate < next)
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.SumAsync(e => (decimal?)e.Amount) ?? 0m;
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s.CalculatedClosingBalance = s.OpeningBalance + s.TotalGiving + s.TotalOtherIncome - s.TotalExpenses;
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s.Difference = s.CalculatedClosingBalance - s.BankStatementBalance;
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}
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private static MonthlyStatementDto Map(MonthlyStatement s) => new()
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{
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Id = s.Id, Year = s.Year, Month = s.Month,
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OpeningBalance = s.OpeningBalance, TotalGiving = s.TotalGiving, TotalOtherIncome = s.TotalOtherIncome,
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TotalExpenses = s.TotalExpenses, CalculatedClosingBalance = s.CalculatedClosingBalance,
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BankStatementBalance = s.BankStatementBalance, Difference = s.Difference,
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Notes = s.Notes, IsFinalized = s.IsFinalized,
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};
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}
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