Split accounts and transactions into models

internal/models/transactions.go

@@ -0,0 +1,133 @@
+package models
+
+import (
+	"encoding/json"
+	"errors"
+	"math/big"
+	"net/http"
+	"strings"
+	"time"
+)
+
+// Split.Status
+const (
+	Imported   int64 = 1
+	Entered          = 2
+	Cleared          = 3
+	Reconciled       = 4
+	Voided           = 5
+)
+
+// Split.ImportSplitType
+const (
+	Default         int64 = 0
+	ImportAccount         = 1 // This split belongs to the main account being imported
+	SubAccount            = 2 // This split belongs to a sub-account of that being imported
+	ExternalAccount       = 3
+	TradingAccount        = 4
+	Commission            = 5
+	Taxes                 = 6
+	Fees                  = 7
+	Load                  = 8
+	IncomeAccount         = 9
+	ExpenseAccount        = 10
+)
+
+type Split struct {
+	SplitId         int64
+	TransactionId   int64
+	Status          int64
+	ImportSplitType int64
+
+	// One of AccountId and SecurityId must be -1
+	// In normal splits, AccountId will be valid and SecurityId will be -1. The
+	// only case where this is reversed is for transactions that have been
+	// imported and not yet associated with an account.
+	AccountId  int64
+	SecurityId int64
+
+	RemoteId string // unique ID from server, for detecting duplicates
+	Number   string // Check or reference number
+	Memo     string
+	Amount   string // String representation of decimal, suitable for passing to big.Rat.SetString()
+}
+
+func GetBigAmount(amt string) (*big.Rat, error) {
+	var r big.Rat
+	_, success := r.SetString(amt)
+	if !success {
+		return nil, errors.New("Couldn't convert string amount to big.Rat via SetString()")
+	}
+	return &r, nil
+}
+
+func (s *Split) GetAmount() (*big.Rat, error) {
+	return GetBigAmount(s.Amount)
+}
+
+func (s *Split) Valid() bool {
+	if (s.AccountId == -1) == (s.SecurityId == -1) {
+		return false
+	}
+	_, err := s.GetAmount()
+	return err == nil
+}
+
+type Transaction struct {
+	TransactionId int64
+	UserId        int64
+	Description   string
+	Date          time.Time
+	Splits        []*Split `db:"-"`
+}
+
+type TransactionList struct {
+	Transactions *[]Transaction `json:"transactions"`
+}
+
+type AccountTransactionsList struct {
+	Account           *Account
+	Transactions      *[]Transaction
+	TotalTransactions int64
+	BeginningBalance  string
+	EndingBalance     string
+}
+
+func (t *Transaction) Write(w http.ResponseWriter) error {
+	enc := json.NewEncoder(w)
+	return enc.Encode(t)
+}
+
+func (t *Transaction) Read(json_str string) error {
+	dec := json.NewDecoder(strings.NewReader(json_str))
+	return dec.Decode(t)
+}
+
+func (tl *TransactionList) Write(w http.ResponseWriter) error {
+	enc := json.NewEncoder(w)
+	return enc.Encode(tl)
+}
+
+func (tl *TransactionList) Read(json_str string) error {
+	dec := json.NewDecoder(strings.NewReader(json_str))
+	return dec.Decode(tl)
+}
+
+func (atl *AccountTransactionsList) Write(w http.ResponseWriter) error {
+	enc := json.NewEncoder(w)
+	return enc.Encode(atl)
+}
+
+func (atl *AccountTransactionsList) Read(json_str string) error {
+	dec := json.NewDecoder(strings.NewReader(json_str))
+	return dec.Decode(atl)
+}
+
+func (t *Transaction) Valid() bool {
+	for i := range t.Splits {
+		if !t.Splits[i].Valid() {
+			return false
+		}
+	}
+	return true
+}