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package main
import (
_ "embed"
"fmt"
"html/template"
"log"
"net/http"
"sync/atomic"
)
//go:embed index.html
var indexTemplate string
var pageTemplate *template.Template
var open atomic.Uint64
var done atomic.Uint64
func pageHandler(w http.ResponseWriter, r *http.Request) {
if r.URL.Path != "/" {
w.WriteHeader(http.StatusNotFound)
return
}
tempData := struct {
Open uint64
Done uint64
IsAdmin bool
}{open.Load(), done.Load() + 1, r.URL.Query().Has("admin")}
if err := pageTemplate.Execute(w, tempData); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
}
func newHandler(w http.ResponseWriter, r *http.Request) {
ticket := open.Add(1)
log.Printf("Create ticket %d\n", ticket)
if _, err := fmt.Fprintf(w, "%d", ticket); err != nil {
log.Printf("Writing response failed: %v", err)
}
}
func doneHandler(w http.ResponseWriter, r *http.Request) {
ticket := done.Add(1)
log.Printf("Finished ticket %d\n", ticket)
if _, err := fmt.Fprintf(w, "%d", ticket); err != nil {
log.Printf("Writing response failed: %v", err)
}
}
func setupRoutes() {
http.HandleFunc("/", pageHandler)
http.HandleFunc("/new", newHandler)
http.HandleFunc("/done", doneHandler)
}
func main() {
setupRoutes()
pageTemplate = template.Must(template.New("index").Parse(indexTemplate))
log.Printf("Serving http on %d", 8080)
err := http.ListenAndServe(fmt.Sprintf(":%d", 8080), nil)
log.Panicf("Serving http failed with %s", err)
}
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