frontend: add time management

frontend/time.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"time"
+)
+
+type TimeHandler struct{
+	StartTime time.Time
+	Duration  time.Duration
+}
+
+type timeObject struct {
+	Started int64 `json:"st"`
+	Time int64 `json:"cu"`
+	Duration int `json:"du"`
+}
+
+func (t TimeHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Content-Type", "application/json")
+
+	if j, err := json.Marshal(timeObject{t.StartTime.Unix(), time.Now().Unix(), int(t.Duration.Seconds())}); err != nil {
+		http.Error(w, fmt.Sprintf("{\"errmsg\":\"%q\"}", err), http.StatusInternalServerError)
+	} else {
+		w.WriteHeader(http.StatusOK)
+		w.Write(j)
+	}
+}