/
rpcServer.go
177 lines (152 loc) · 5.65 KB
/
rpcServer.go
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package main
import (
"net/http"
"github.com/gorilla/rpc"
"github.com/gorilla/rpc/json"
"strconv"
"yahoofinance"
"math"
"strings"
)
var tradeStorage [100]TradeStorage
var tradecount int = 1
type Args struct {
StockSymbolAndPercentage string
Budget int
}
type Reply struct {
TradeId int
Stocks string
UnvestedAmount float64
}
type TradeArgs struct {
TradeId int
}
type TradeReply struct {
Stocks string
CurrentMarketValue float64
UnvestedAmount float64
}
type StockInfo struct {
companyName string
percentage int
}
type StockStorage struct {
companyName string
numberOfStock int
stockPrice float64
}
type TradeStorage struct {
stockList []StockStorage
tradeId int
uninvestedAmount float64
}
type StockService struct {}
func splitStockData(stockInfo string) []StockInfo{
var stockData []string = strings.Split(stockInfo, ",")
lengthOfStock := len(stockData)
splitData := make([]StockInfo, lengthOfStock, lengthOfStock)
for i := 0; i < lengthOfStock; i++ {
var leftData []string = strings.Split(stockData[i], ":")
leftData[1] = strings.TrimSuffix(leftData[1], "%")
splitData[i].companyName = leftData[0]
splitData[i].percentage, _ = strconv.Atoi(leftData[1])
}
return splitData
}
func buyStock(stockInfo []StockInfo, priceList []float64, budget int) Reply{
totalItems := len(stockInfo)
tradeStorage[tradecount].stockList = make([]StockStorage, totalItems, totalItems)
var responseData string
var reply Reply
for i := 0; i < totalItems; i++ {
var expectedInvestment float64 = float64((budget * stockInfo[i].percentage)/100)
var numberOfStock int
var uninvestedMoney float64
if expectedInvestment > priceList[i] {
numberOfStock = int(expectedInvestment/priceList[i])
uninvestedMoney = math.Mod(expectedInvestment, priceList[i])
} else {
numberOfStock = 0
uninvestedMoney = expectedInvestment
}
responseData += "'" + stockInfo[i].companyName + ":" + strconv.Itoa(numberOfStock) + ":" + "$" + strconv.FormatFloat(priceList[i], 'f', -1, 64) + "'"
if i!=(totalItems-1) {
responseData += ","
}
tradeStorage[tradecount].stockList[i].companyName = stockInfo[i].companyName
tradeStorage[tradecount].stockList[i].numberOfStock = numberOfStock
tradeStorage[tradecount].stockList[i].stockPrice = priceList[i]
tradeStorage[tradecount].uninvestedAmount += uninvestedMoney
}
tradeStorage[tradecount].tradeId = tradecount
reply.TradeId = tradecount
reply.Stocks = responseData
reply.UnvestedAmount = tradeStorage[tradecount].uninvestedAmount
tradecount++
return reply
}
func getStock(tradeId int) TradeReply{
var nameOfCompanies string
var totalStocks int = len(tradeStorage[tradeId].stockList)
var currentMarketValue float64
var responseData string
var reply TradeReply
for i := 0; i < (totalStocks-1); i++ {
nameOfCompanies += tradeStorage[tradeId].stockList[i].companyName + ","
}
nameOfCompanies += tradeStorage[tradeId].stockList[totalStocks-1].companyName
var currentPriceList []float64 = yahoofinance.ReturnStockPrice(nameOfCompanies)
for i := 0; i < totalStocks; i++ {
companyName := tradeStorage[tradeId].stockList[i].companyName
numberOfStock := tradeStorage[tradeId].stockList[i].numberOfStock
buyingPrice := tradeStorage[tradeId].stockList[i].stockPrice
currentMarketValue += float64(numberOfStock) * currentPriceList[i]
responseData += "'" + companyName + ":" + strconv.Itoa(numberOfStock) + ":"
if(buyingPrice < currentPriceList[i]) {
responseData += "+" + "$" + strconv.FormatFloat(currentPriceList[i], 'f', -1, 64) + "'"
} else if(buyingPrice > currentPriceList[i]) {
responseData += "-" + "$" + strconv.FormatFloat(currentPriceList[i], 'f', -1, 64) + "'"
} else {
responseData += "$" + strconv.FormatFloat(currentPriceList[i], 'f', -1, 64) + "'"
}
if i!=(totalStocks-1) {
responseData += ","
}
}
reply.Stocks = responseData
reply.CurrentMarketValue = currentMarketValue
reply.UnvestedAmount = tradeStorage[tradeId].uninvestedAmount
return reply
}
func (s *StockService) ReturnStock(r *http.Request, args *Args, reply *Reply) error {
var receivedData string = args.StockSymbolAndPercentage
var budget int = args.Budget
var stockInfo []StockInfo = splitStockData(receivedData)
var nameOfCompanies string
for i := 0; i < len(stockInfo)-1; i++ {
nameOfCompanies += stockInfo[i].companyName + ","
}
nameOfCompanies += stockInfo[len(stockInfo)- 1].companyName
var priceList []float64 = yahoofinance.ReturnStockPrice(nameOfCompanies)
var replyFromStockMarket Reply = buyStock(stockInfo, priceList, budget)
reply.TradeId = replyFromStockMarket.TradeId
reply.Stocks = replyFromStockMarket.Stocks
reply.UnvestedAmount = replyFromStockMarket.UnvestedAmount
return nil
}
func (s *StockService) ReturnPortfolio(r *http.Request, args *TradeArgs, reply *TradeReply) error {
tradeId := args.TradeId
var replyFromSystem TradeReply = getStock(tradeId)
reply.Stocks = replyFromSystem.Stocks
reply.CurrentMarketValue = replyFromSystem.CurrentMarketValue
reply.UnvestedAmount = replyFromSystem.UnvestedAmount
return nil
}
func main() {
s := rpc.NewServer()
s.RegisterCodec(json.NewCodec(), "application/json")
s.RegisterService(new(StockService), "")
http.Handle("/stock", s)
http.ListenAndServe(":8080", nil)
}