genofire/hs_monolith
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hs_monolith
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hs_monolith/http/good_temp.go

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// Package that contains all api routes of this microservice
package http
import (
"bytes"
"io"
"net/http"
"os"
"text/template"
)
// Path to the svg image template, that shows the availablity of a given good
// with a traffic light food labeling system
var GoodAvailablityTemplate string
// Function to calculate a percent value from a given value and an maximum value
func tempPercent(value, max int) int {
return value * 100 / max
}
// Function to calculate a partial radius, depending on a percentage value
func tempProcessRadius(value, max, radius int) float64 {
return (1 - float64(value)/float64(max)) * float64(radius) * 2 * 3.14
}
// Function to get the SVG, that shows the traffic light food labeling system for a given good
func getGoodAvailablitySVG(w http.ResponseWriter, count int) {
t := template.New("some")
t = t.Funcs(template.FuncMap{"procent": tempPercent,
"process_radius": tempProcessRadius,
})
buf := bytes.NewBuffer(nil)
f, _ := os.Open(GoodAvailablityTemplate) // Error handling elided for brevity.
io.Copy(buf, f) // Error handling elided for brevity.
f.Close()
s := string(buf.Bytes())
t.Parse(s)
w.Header().Set("Content-Type", "image/svg+xml")
t.Execute(w, map[string]interface{}{"Count": count})
}