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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| package server | ||
|
|
||
| import ( | ||
| "time" | ||
|
|
||
| "github.com/ananthakumaran/paisa/internal/accounting" | ||
| "github.com/ananthakumaran/paisa/internal/config" | ||
| "github.com/ananthakumaran/paisa/internal/model/posting" | ||
| "github.com/ananthakumaran/paisa/internal/query" | ||
| "github.com/ananthakumaran/paisa/internal/utils" | ||
| "github.com/gin-gonic/gin" | ||
| "github.com/shopspring/decimal" | ||
| log "github.com/sirupsen/logrus" | ||
| "gorm.io/gorm" | ||
| ) | ||
|
|
||
| type CreditCardSummary struct { | ||
| Account string `json:"account"` | ||
| Network string `json:"network"` | ||
| Number string `json:"number"` | ||
| Balance decimal.Decimal `json:"balance"` | ||
| Bills []CreditCardBill `json:"bills"` | ||
| CreditLimit decimal.Decimal `json:"creditLimit"` | ||
| } | ||
|
|
||
| type CreditCardBill struct { | ||
| StatementStartDate time.Time `json:"statementStartDate"` | ||
| StatementEndDate time.Time `json:"statementEndDate"` | ||
| DueDate time.Time `json:"dueDate"` | ||
| PaidDate *time.Time `json:"paidDate"` | ||
| Credits decimal.Decimal `json:"credits"` | ||
| Debits decimal.Decimal `json:"debits"` | ||
| OpeningBalance decimal.Decimal `json:"openingBalance"` | ||
| ClosingBalance decimal.Decimal `json:"closingBalance"` | ||
| Postings []posting.Posting `json:"postings"` | ||
| } | ||
|
|
||
| func GetCreditCards(db *gorm.DB) gin.H { | ||
| creditCards := []CreditCardSummary{} | ||
|
|
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| for _, creditCardConfig := range config.GetConfig().CreditCards { | ||
| ps := query.Init(db).Where("account = ?", creditCardConfig.Account).All() | ||
| creditCards = append(creditCards, buildCreditCard(creditCardConfig, ps)) | ||
| } | ||
|
|
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| return gin.H{"creditCards": creditCards} | ||
| } | ||
|
|
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| func buildCreditCard(creditCardConfig config.CreditCard, ps []posting.Posting) CreditCardSummary { | ||
| bills := computeBills(creditCardConfig, ps) | ||
| balance := decimal.Zero | ||
| if len(bills) > 0 { | ||
| balance = bills[len(bills)-1].ClosingBalance | ||
| } | ||
| return CreditCardSummary{ | ||
| Account: creditCardConfig.Account, | ||
| Network: creditCardConfig.Network, | ||
| Number: creditCardConfig.Number, | ||
| Balance: balance, | ||
| Bills: bills, | ||
| CreditLimit: decimal.NewFromInt(int64(creditCardConfig.CreditLimit)), | ||
| } | ||
| } | ||
|
|
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| func computeBills(creditCardConfig config.CreditCard, ps []posting.Posting) []CreditCardBill { | ||
| bills := []CreditCardBill{} | ||
|
|
||
| grouped := accounting.GroupByMonthlyBillingCycle(ps, creditCardConfig.StatementEndDay) | ||
|
|
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| balance := decimal.Zero | ||
| unpaidBalance := decimal.Zero | ||
| unpaidBill := 0 | ||
|
|
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| for _, month := range utils.SortedKeys(grouped) { | ||
| statementEndDate, err := time.Parse("2006-01", month) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
|
|
||
| statementEndDate = statementEndDate.AddDate(0, 0, creditCardConfig.StatementEndDay-1) | ||
| statementStartDate := statementEndDate.AddDate(0, -1, -1) | ||
|
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| var dueDate time.Time | ||
| if creditCardConfig.StatementEndDay < creditCardConfig.DueDay { | ||
| dueDate = utils.BeginningOfMonth(statementEndDate).AddDate(0, 0, creditCardConfig.DueDay-1) | ||
| } else { | ||
| dueDate = utils.BeginningOfMonth(statementEndDate).AddDate(0, 1, creditCardConfig.DueDay-1) | ||
| } | ||
|
|
||
| bill := CreditCardBill{ | ||
| StatementStartDate: statementStartDate, | ||
| StatementEndDate: statementEndDate, | ||
| DueDate: dueDate, | ||
| OpeningBalance: balance, | ||
| Postings: []posting.Posting{}, | ||
| } | ||
|
|
||
| for _, p := range grouped[month] { | ||
| balance = balance.Add(p.Amount.Neg()) | ||
|
|
||
| if p.Amount.IsPositive() { | ||
| bill.Credits = bill.Credits.Add(p.Amount) | ||
| if unpaidBalance.IsPositive() { | ||
|
|
||
| unpaidBalance = unpaidBalance.Sub(p.Amount) | ||
| if unpaidBalance.LessThanOrEqual(decimal.Zero) { | ||
|
|
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| unpaidBalance = decimal.Zero | ||
| for i := unpaidBill; i < len(bills); i++ { | ||
| paidDate := p.Date | ||
| bills[i].PaidDate = &paidDate | ||
| } | ||
| unpaidBill = len(bills) | ||
| } | ||
|
|
||
| } | ||
| } else { | ||
| bill.Debits = bill.Debits.Add(p.Amount.Neg()) | ||
| } | ||
|
|
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| bill.Postings = append(bill.Postings, p) | ||
|
|
||
| } | ||
|
|
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| bill.ClosingBalance = balance | ||
| unpaidBalance = balance | ||
| bills = append(bills, bill) | ||
| } | ||
|
|
||
| return bills | ||
| } |
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