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computation.go
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/
computation.go
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package controllers
import (
"encoding/json"
"net/http"
"github.com/juby-gif/cranberry-server/utils/models"
cache "github.com/patrickmn/go-cache"
)
func (c *Controller) postAdd(w http.ResponseWriter, r *http.Request) {
var numberArr []float64
var requestData models.AddRequest
data := r.Body
err := json.NewDecoder(data).Decode(&requestData)
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
if cachedNumberArr, found := c.cache.Get("numberArr"); found {
parsedNumberArr := append(cachedNumberArr.([]float64), requestData.Number)
c.cache.Set("numberArr", parsedNumberArr, cache.NoExpiration)
} else {
numberArr = append(numberArr, requestData.Number)
c.cache.Set("numberArr", numberArr, cache.NoExpiration)
}
var responseData = &models.AddResponse{
Message: "Your number was added successfully!",
}
err = json.NewEncoder(w).Encode(&responseData)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
}
func (c *Controller) getCalc(w http.ResponseWriter, r *http.Request) {
var numberArr []float64
chan1 := make(chan float64)
chan2 := make(chan float64)
if cachedNumberArr, found := c.cache.Get("numberArr"); found {
numberArr = cachedNumberArr.([]float64)
}
go calcSumRoutine(numberArr, chan1)
go calcAvgRoutine(numberArr, chan2)
sumCh, avgCh := <-chan1, <-chan2
count := len(numberArr)
var responseData = &models.CalcResponse{
Sum: sumCh,
Average: avgCh,
Count: count,
}
err := json.NewEncoder(w).Encode(&responseData)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
}
func calcSumRoutine(numberArr []float64, chan1 chan float64) {
var sum float64
for _, v := range numberArr {
sum += v
}
chan1 <- sum
}
func calcAvgRoutine(numberArr []float64, chan2 chan float64) {
chan1 := make(chan float64)
go calcSumRoutine(numberArr, chan1)
sum := <-chan1
avg := sum / float64(len(numberArr))
chan2 <- avg
}