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chore: replace int amount_cents for string storage and decimal pkg

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juancwu 2026-03-14 14:43:39 -04:00
commit c8a1eb5b7a
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45 changed files with 706 additions and 587 deletions
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51
internal/service/loan.go
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@ -7,6 +7,7 @@ import (
"git.juancwu.dev/juancwu/budgit/internal/model"
"git.juancwu.dev/juancwu/budgit/internal/repository"
"github.com/google/uuid"
"github.com/shopspring/decimal"
)
type CreateLoanDTO struct {
@ -14,7 +15,7 @@ type CreateLoanDTO struct {
UserID string
Name string
Description string
OriginalAmount int
OriginalAmount decimal.Decimal
InterestRateBps int
StartDate time.Time
EndDate *time.Time
@ -24,7 +25,7 @@ type UpdateLoanDTO struct {
ID string
Name string
Description string
OriginalAmount int
OriginalAmount decimal.Decimal
InterestRateBps int
StartDate time.Time
EndDate *time.Time
@ -48,24 +49,24 @@ func (s *LoanService) CreateLoan(dto CreateLoanDTO) (*model.Loan, error) {
if dto.Name == "" {
return nil, fmt.Errorf("loan name cannot be empty")
}
if dto.OriginalAmount <= 0 {
if dto.OriginalAmount.LessThanOrEqual(decimal.Zero) {
return nil, fmt.Errorf("amount must be positive")
}
now := time.Now()
loan := &model.Loan{
ID: uuid.NewString(),
SpaceID: dto.SpaceID,
Name: dto.Name,
Description: dto.Description,
OriginalAmountCents: dto.OriginalAmount,
InterestRateBps: dto.InterestRateBps,
StartDate: dto.StartDate,
EndDate: dto.EndDate,
IsPaidOff: false,
CreatedBy: dto.UserID,
CreatedAt: now,
UpdatedAt: now,
ID: uuid.NewString(),
SpaceID: dto.SpaceID,
Name: dto.Name,
Description: dto.Description,
OriginalAmount: dto.OriginalAmount,
InterestRateBps: dto.InterestRateBps,
StartDate: dto.StartDate,
EndDate: dto.EndDate,
IsPaidOff: false,
CreatedBy: dto.UserID,
CreatedAt: now,
UpdatedAt: now,
}
if err := s.loanRepo.Create(loan); err != nil {
@ -95,10 +96,10 @@ func (s *LoanService) GetLoanWithSummary(id string) (*model.LoanWithPaymentSumma
}
return &model.LoanWithPaymentSummary{
Loan: *loan,
TotalPaidCents: totalPaid,
RemainingCents: loan.OriginalAmountCents - totalPaid,
ReceiptCount: receiptCount,
Loan: *loan,
TotalPaid: totalPaid,
Remaining: loan.OriginalAmount.Sub(totalPaid),
ReceiptCount: receiptCount,
}, nil
}
@ -154,10 +155,10 @@ func (s *LoanService) attachSummaries(loans []*model.Loan) ([]*model.LoanWithPay
return nil, err
}
result[i] = &model.LoanWithPaymentSummary{
Loan: *loan,
TotalPaidCents: totalPaid,
RemainingCents: loan.OriginalAmountCents - totalPaid,
ReceiptCount: receiptCount,
Loan: *loan,
TotalPaid: totalPaid,
Remaining: loan.OriginalAmount.Sub(totalPaid),
ReceiptCount: receiptCount,
}
}
return result, nil
@ -167,7 +168,7 @@ func (s *LoanService) UpdateLoan(dto UpdateLoanDTO) (*model.Loan, error) {
if dto.Name == "" {
return nil, fmt.Errorf("loan name cannot be empty")
}
if dto.OriginalAmount <= 0 {
if dto.OriginalAmount.LessThanOrEqual(decimal.Zero) {
return nil, fmt.Errorf("amount must be positive")
}
@ -178,7 +179,7 @@ func (s *LoanService) UpdateLoan(dto UpdateLoanDTO) (*model.Loan, error) {
existing.Name = dto.Name
existing.Description = dto.Description
existing.OriginalAmountCents = dto.OriginalAmount
existing.OriginalAmount = dto.OriginalAmount
existing.InterestRateBps = dto.InterestRateBps
existing.StartDate = dto.StartDate
existing.EndDate = dto.EndDate