package main
import (
"encoding/json"
"log/slog"
"math/rand"
"net/http"
"os"
"path/filepath"
"strconv"
"strings"
"text/template"
"time"
"git.andreafazzi.eu/andrea/probo/models"
)
var Dir = "data"
type ExamSession []*models.Exam
func generateRandomID() string {
id := ""
for i := 0; i < 6; i++ {
id += strconv.Itoa(rand.Intn(9) + 1)
}
return id
}
func createExamSessionHandler(w http.ResponseWriter, r *http.Request) {
var p ExamSession
err := json.NewDecoder(r.Body).Decode(&p)
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
id := generateRandomID()
path := filepath.Join(Dir, id)
err = os.MkdirAll(path, os.ModePerm)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
for _, exam := range p {
file, err := os.Create(filepath.Join(path, strconv.Itoa(exam.Participant.Token)) + ".json")
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
defer file.Close()
err = json.NewEncoder(file).Encode(exam)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
}
response := map[string]string{"id": id}
json.NewEncoder(w).Encode(response)
}
func getExamHandler(w http.ResponseWriter, r *http.Request) {
urlParts := strings.Split(r.URL.Path, "/")
examID := urlParts[1]
token := urlParts[2]
filePath := filepath.Join(Dir, examID, token+".json")
data, err := os.ReadFile(filePath)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
exam := new(models.Exam)
err = json.Unmarshal(data, &exam)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "text/html")
tmpl := template.Must(template.New("exam").Parse(`
{{.Name}}
{{.Name}}
{{.Participant.Firstname}} {{.Participant.Lastname}}
`))
err = tmpl.Execute(w, exam)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
}
func main() {
mux := http.NewServeMux()
mux.HandleFunc("/create", createExamSessionHandler)
mux.HandleFunc("/", getExamHandler)
slog.Info("Probo server started", "at", time.Now())
http.ListenAndServe(":8080", mux)
}