func DecimalToString(res decimal.Decimal, min int32, max int32) string {
if res.Cmp(decimal.New(10, min)) <= 0 || res.Cmp(decimal.New(10, max)) >= 0 {
f, _ := res.Float64()
return strconv.FormatFloat(f, 'G', -1, 64)
}
return res.String()
}
func (irrf *IRRF) Calculate(grossSalary decimal.Decimal) decimal.Decimal {
for _, irrfInterval := range irrf.irrfRange {
if grossSalary.Cmp(irrfInterval.Lower) >= 0 && grossSalary.Cmp(irrfInterval.Upper) <= 0 {
return grossSalary.Mul(irrfInterval.Aliquot).Sub(irrfInterval.Deduction)
}
}
lastIRRFInterval := irrf.irrfRange[len(irrf.irrfRange)-1]
return grossSalary.Mul(lastIRRFInterval.Aliquot).Sub(lastIRRFInterval.Deduction)
}
func (inss *INSS) Calculate(grossSalary decimal.Decimal) decimal.Decimal {
for _, inssInterval := range inss.inssRange {
if grossSalary.Cmp(inssInterval.Lower) >= 0 && grossSalary.Cmp(inssInterval.Upper) <= 0 {
return grossSalary.Mul(inssInterval.Aliquot)
}
}
lastINSSInterval := inss.inssRange[len(inss.inssRange)-1]
return lastINSSInterval.Upper.Mul(lastINSSInterval.Aliquot)
}
func PerformBuyTrigger(w http.ResponseWriter, r *http.Request) {
zero, _ := decimal.NewFromString("0")
vars := mux.Vars(r)
UserId := vars["id"]
StockId := vars["symbol"]
TransId := r.Header.Get("X-TransNo")
if TransId == "" {
TransId = "0"
}
type trigger_struct struct {
TriggerId string
}
decoder := json.NewDecoder(r.Body)
var t trigger_struct
err := decoder.Decode(&t)
if err != nil {
}
Guid := getNewGuid()
//Check If User Exists
db, uid, found, _ := getDatabaseUserId(UserId)
if !found {
//error
return
}
//Get A Quote
var strPrice string
strPrice, _ = getStockPrice(TransId, "false", UserId, StockId, Guid.String())
var quotePrice decimal.Decimal
quotePrice, err = decimal.NewFromString(strPrice)
if err != nil {
//writeResponse(w, http.StatusInternalServerError, "Quote Return is not Valid")
return
}
if quotePrice.Cmp(zero) != 1 {
Error := ErrorEvent{
EventType: "ErrorEvent",
Guid: Guid.String(),
OccuredAt: time.Now(),
TransactionId: TransId,
UserId: UserId,
Service: "API",
Server: Hostname,
Command: "ADD",
StockSymbol: "",
Funds: strPrice,
FileName: "",
ErrorMessage: "Quote is not greater than 0",
}
SendRabbitMessage(Error, Error.EventType)
//writeResponse(w, http.StatusBadRequest, "Amount to buy is not a valid number")
return
}
//Get Trigger Information
rows, err := db.Query(getTriggerById, t.TriggerId)
defer rows.Close()
if err != nil {
//error
return
}
var id int
var stock string
var trigger_type string
var trigger_price string
var num_shares int
var created_at time.Time
found = false
for rows.Next() {
found = true
err = rows.Scan(&id, &uid, &stock, &trigger_type, &trigger_price, &num_shares, &created_at)
}
if err != nil {
//error
return
}
if !found {
//error
return
}
trigger_price = strings.Trim(trigger_price, "$")
trigger_price = strings.Replace(trigger_price, ",", "", -1)
trigger_priceDec, err := decimal.NewFromString(trigger_price)
if quotePrice.Cmp(trigger_priceDec) != -1 {
//error
return
}
//Commit trigger at price
_, err = db.Exec(performBuyTrigger, id, strPrice)
if err != nil {
//error
return
}
}
func UpdateSale(w http.ResponseWriter, r *http.Request) {
zero, _ := decimal.NewFromString("0")
vars := mux.Vars(r)
UserId := vars["id"]
TransId := vars["PurchaseId"]
//get User Account Information
db, uid, found, _ := getDatabaseUserId(UserId)
if found == false {
writeResponse(w, http.StatusOK, "User Account Does Not Exist")
return
}
Guid := getNewGuid()
//Find last Sell Command
LatestPendingrows, err := db.Query(getLatestPendingSale, uid)
defer LatestPendingrows.Close()
if err != nil {
writeResponse(w, http.StatusOK, "Error Getting Last Sale: "+err.Error())
return
}
var id string
var stock string
var num_shares int
var share_price string
var requested_at time.Time
var expires_at time.Time
found = false
for LatestPendingrows.Next() {
found = true
err = LatestPendingrows.Scan(&id, &uid, &stock, &num_shares, &share_price, &requested_at, &expires_at)
}
if found == false {
writeResponse(w, http.StatusOK, "No Recent Sell Commands")
return
}
strOldPrice := strings.TrimPrefix(share_price, "$")
strOldPrice = strings.Replace(strOldPrice, ",", "", -1)
OldPrice, err := decimal.NewFromString(strOldPrice)
if err != nil {
writeResponse(w, http.StatusBadRequest, err.Error()+strOldPrice)
return
}
//Get and Verify Quote
var strPrice string
strPrice, _ = getStockPrice(TransId, "true", UserId, stock, Guid.String())
var quotePrice decimal.Decimal
quotePrice, err = decimal.NewFromString(strPrice)
if err != nil {
writeResponse(w, http.StatusBadRequest, err.Error())
return
}
if quotePrice.Cmp(zero) != 1 {
writeResponse(w, http.StatusBadRequest, "Quote is not a valid number")
return
}
totalAmount := decimal.New(int64(num_shares), 0).Mul(OldPrice)
newShareNum := totalAmount.Div(quotePrice).IntPart()
diffShares := int(newShareNum) - num_shares
_, err = db.Exec(updateSale, TransId, int(newShareNum), strPrice, int(diffShares), time.Now().Add(time.Duration(60)*time.Second))
if err != nil {
writeResponse(w, http.StatusBadRequest, "Unable to update Sale")
return
}
type return_struct struct {
Error bool
SaleId string
Price string
NumShares int64
Expiration time.Duration
}
//Build Response
rtnStruct := return_struct{false, id, strPrice, newShareNum, -1}
strRtnStruct, err := json.Marshal(rtnStruct)
writeResponse(w, http.StatusOK, string(strRtnStruct))
return
}
func Sell(w http.ResponseWriter, r *http.Request) {
zero, _ := decimal.NewFromString("0")
type sell_struct struct {
Amount string
Symbol string
}
type return_struct struct {
Error bool
SaleId int
Price string
NumShares int64
Expiration time.Duration
}
vars := mux.Vars(r)
UserId := vars["id"]
TransId := r.Header.Get("X-TransNo")
if TransId == "" {
TransId = "0"
}
//Decode Body
decoder := json.NewDecoder(r.Body)
var t sell_struct
err := decoder.Decode(&t)
//Audit UserCommand
Guid := getNewGuid()
OccuredAt := time.Now()
CommandEvent := UserCommandEvent{
EventType: "UserCommandEvent",
Guid: Guid.String(),
OccuredAt: OccuredAt,
TransactionId: TransId,
UserId: UserId,
Service: "Command",
Server: Hostname,
Command: "SELL",
StockSymbol: t.Symbol,
Funds: t.Amount,
}
SendRabbitMessage(CommandEvent, CommandEvent.EventType)
if err != nil {
writeResponse(w, http.StatusBadRequest, err.Error())
return
}
//get User Account Information
db, id, found, _ := getDatabaseUserId(UserId)
if found == false {
writeResponse(w, http.StatusOK, "User Account Does Not Exist")
return
}
//Check amount
AmountDec, err := decimal.NewFromString(t.Amount)
if err != nil {
writeResponse(w, http.StatusBadRequest, err.Error())
return
}
if AmountDec.Cmp(zero) != 1 {
writeResponse(w, http.StatusBadRequest, "Amount to sell is not a valid number")
return
}
//Check Stock Symbol
StockId := t.Symbol
if len(StockId) == 0 || len(StockId) > 3 {
writeResponse(w, http.StatusBadRequest, "Symbol is Not Valid")
return
}
//Get and Verify Quote
var strPrice string
var strExpiration string
strPrice, strExpiration = getStockPrice(TransId, "true", UserId, StockId, Guid.String())
var quotePrice decimal.Decimal
quotePrice, err = decimal.NewFromString(strPrice)
if err != nil {
writeResponse(w, http.StatusBadRequest, err.Error())
return
}
if quotePrice.Cmp(zero) != 1 {
writeResponse(w, http.StatusBadRequest, "Quote is not a valid number")
return
}
//Verify Expiration Time
ExpirationTime, err := time.Parse("2006-01-02 15:04:05 -0700 MST", strExpiration)
if err != nil {
writeResponse(w, http.StatusOK, "Expiration Conversion Error")
return
}
//Calculate Amount to Sell
toSell := (AmountDec.Div(quotePrice)).IntPart()
if toSell < 1 {
writeResponse(w, http.StatusOK, "Can't Sell less than 1 Stock")
return
}
strSell := strconv.Itoa(int(toSell))
//Create Pending Sale
var SaleId int
rows, err := db.Query(addPendingSale, id, t.Symbol, strSell, strPrice, time.Now(), ExpirationTime)
defer rows.Close()
if err != nil {
writeResponse(w, http.StatusBadRequest, "Add pending Sale; "+err.Error())
return
}
TimeToExpiration := (ExpirationTime.Sub(time.Now())) / time.Millisecond
rows.Next()
err = rows.Scan(&SaleId)
//Build Response
rtnStruct := return_struct{false, SaleId, strPrice, toSell, TimeToExpiration}
strRtnStruct, err := json.Marshal(rtnStruct)
//success
writeResponse(w, http.StatusOK, string(strRtnStruct))
return
}
func Buy(w http.ResponseWriter, r *http.Request) {
zero, _ := decimal.NewFromString("0")
type buy_struct struct {
Amount string
Symbol string
}
type return_struct struct {
Error bool
SaleId int
Price string
NumShares int64
Expiration time.Duration
}
vars := mux.Vars(r)
UserId := vars["id"]
TransId := r.Header.Get("X-TransNo")
if TransId == "" {
TransId = "0"
}
decoder := json.NewDecoder(r.Body)
var t buy_struct
err := decoder.Decode(&t)
//Audit UserCommand
Guid := getNewGuid()
CommandEvent := UserCommandEvent{
EventType: "UserCommandEvent",
Guid: Guid.String(),
OccuredAt: time.Now(),
TransactionId: TransId,
UserId: UserId,
Service: "Command",
Server: Hostname,
Command: "BUY",
StockSymbol: t.Symbol,
Funds: t.Amount,
}
SendRabbitMessage(CommandEvent, CommandEvent.EventType)
//Decode Request Body
if err != nil {
writeResponse(w, http.StatusBadRequest, "Request Body Is Invalid")
return
}
//Validate Request Body
AmountDec, err := decimal.NewFromString(t.Amount)
if err != nil {
writeResponse(w, http.StatusBadRequest, "Request Body Is Invalid")
return
}
//Validate amount to buy
if AmountDec.Cmp(zero) != 1 {
writeResponse(w, http.StatusBadRequest, "Amount to buy is not a valid number")
return
}
StockId := t.Symbol
//Validate Stock Symbol
if len(StockId) == 0 || len(StockId) > 3 {
writeResponse(w, http.StatusBadRequest, "Symbol is Not Valid")
return
}
//Get and Validate Quote
var strPrice string
var strExpiration string
strPrice, strExpiration = getStockPrice(TransId, "true", UserId, StockId, Guid.String())
var quotePrice decimal.Decimal
quotePrice, err = decimal.NewFromString(strPrice)
if err != nil {
writeResponse(w, http.StatusInternalServerError, "Quote Return is not Valid")
return
}
if quotePrice.Cmp(zero) != 1 {
writeResponse(w, http.StatusBadRequest, "Amount to buy is not a valid number: "+quotePrice.String())
return
}
//Verify Expiration Time
ExpirationTime, err := time.Parse("2006-01-02 15:04:05 -0700 MST", strExpiration)
if err != nil {
writeResponse(w, http.StatusOK, "Expiration Conversion Error")
return
}
//Check If User Exists
db, uid, found, _ := getDatabaseUserId(UserId)
if found == false {
writeResponse(w, http.StatusBadRequest, "User Does Not Exist")
return
}
//Calculate Stock To Buy
toBuy := (AmountDec.Div(quotePrice)).IntPart()
//Validate Buy Amount
if toBuy < 1 {
writeResponse(w, http.StatusBadRequest, "Cannot Buy less than 1 stock")
return
}
strBuy := strconv.Itoa(int(toBuy))
//Add Pending Purchase for Amount
var PurchaseId int
rows, err := db.Query(addPendingPurchase, uid, t.Symbol, strBuy, strPrice, time.Now(), ExpirationTime)
defer rows.Close()
if err != nil {
writeResponse(w, http.StatusInternalServerError, "Failed to Create Purchase")
return
}
rows.Next()
err = rows.Scan(&PurchaseId)
if err != nil {
writeResponse(w, http.StatusBadRequest, "Sale Id Request Failed")
return
}
TimeToExpiration := (ExpirationTime.Sub(time.Now())) / time.Millisecond
//Build Response
rtnStruct := return_struct{false, PurchaseId, strPrice, toBuy, TimeToExpiration}
strRtnStruct, err := json.Marshal(rtnStruct)
//success
writeResponse(w, http.StatusOK, string(strRtnStruct))
return
}
// isPositiveDecimal checks if the decimal is positive
func isNegativeDecimal(amount decimal.Decimal) bool {
return amount.Cmp(decimal.NewFromFloat(0)) < 0
}