46 lines
1.6 KiB
C#
46 lines
1.6 KiB
C#
using FinancialApi.Domain.Entities;
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using FinancialApi.Domain.Exceptions;
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namespace FinancialApi.Domain.Aggregates;
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public record BalancedJournal
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{
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public BalancedJournalEntry Entry { get; }
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private BalancedJournal(BalancedJournalEntry entry)
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{
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Entry = entry;
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}
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public static BalancedJournal Create(Guid id, string description, DateTimeOffset createdAt, List<JournalLine> lines)
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{
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if (lines.Count(l => l.Type == EntryType.Debit) == 0)
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{
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throw new GaapViolationException($"GAAP Violation: A journal entry needs at least one debit line.");
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}
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if (lines.Count(l => l.Type == EntryType.Credit) == 0)
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{
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throw new GaapViolationException($"A journal entry needs at least one credit line.");
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}
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var debits = lines.Where(l => l.Type == EntryType.Debit)
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.Sum(l => l.Amount);
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var credits = lines.Where(l => l.Type == EntryType.Credit)
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.Sum(l => l.Amount);
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return debits != credits
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? throw new GaapViolationException($"Total Debits ({debits}) must equal Total Credits ({credits})!")
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: new BalancedJournal(new BalancedJournalEntry(id, description, createdAt, lines));
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}
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public static BalancedJournal CreateReversal(BalancedJournalEntry original, string reason, DateTimeOffset now)
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{
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var reversedLines = original.Lines.Select(l =>
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l with { Type = l.Type == EntryType.Debit ? EntryType.Credit : EntryType.Debit }
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)
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.ToList();
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return Create(Guid.NewGuid(), reason, now, reversedLines);
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}
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} |