40 lines
1.2 KiB
C#
40 lines
1.2 KiB
C#
using FinancialApi.Domain.Entities;
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namespace FinancialApi.Domain.Aggregates;
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public record BalancedJournal
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{
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public JournalEntry Entry { get; }
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private BalancedJournal(JournalEntry 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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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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if (debits != credits)
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{
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throw new InvalidOperationException(
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$"GAAP Violation: Total Debits ({debits}) must equal Total Credits ({credits})!"
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);
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}
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return new BalancedJournal(new JournalEntry(id, description, createdAt, lines));
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}
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public static BalancedJournal CreateReversal(JournalEntry 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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} |