closes #6

Backend/models/workWeek.go

@@ -1,6 +1,7 @@
 package models
 
 import (
+	"database/sql"
 	"errors"
 	"log"
 	"time"
@@ -14,6 +15,14 @@ type WorkWeek struct {
 	WorkHours time.Duration
 }
 
+type WeekStatus int16
+
+const (
+	None WeekStatus = iota
+	Sent
+	Accepted
+)
+
 func (w *WorkWeek) GetWeek(user User, tsMonday time.Time, populateDays bool) WorkWeek {
 	var week WorkWeek
 	if populateDays {
@@ -25,6 +34,31 @@ func (w *WorkWeek) GetWeek(user User, tsMonday time.Time, populateDays bool) Wor
 	return week
 }
 
+func (w *WorkWeek) CheckStatus() WeekStatus {
+	weekStatus := None
+	qStr, err := DB.Prepare(`SELECT bestaetigt FROM wochen_report WHERE woche_start = $1::DATE AND personal_nummer = $2;`)
+	if err != nil {
+		log.Println("Error preparing SQL statement", err)
+		return weekStatus
+	}
+	defer qStr.Close()
+	var beastatigt bool
+	err = qStr.QueryRow(w.WeekStart, w.User.PersonalNummer).Scan(&beastatigt)
+	if err == sql.ErrNoRows {
+		return weekStatus
+	}
+	if err != nil {
+		log.Println("Error querying database", err)
+		return weekStatus
+	}
+	if beastatigt {
+		weekStatus = Accepted
+	} else {
+		weekStatus = Sent
+	}
+	return weekStatus
+}
+
 func (w *WorkWeek) GetWorkHourString() string {
 	return formatDuration(w.WorkHours)
 }
@@ -74,14 +108,24 @@ var ErrRunningWeek = errors.New("Week is in running week")
 
 // creates a new entry in the woche_report table with the given workweek
 func (w *WorkWeek) Send() error {
+	var qStr *sql.Stmt
+	var err error
 	if time.Since(w.WeekStart) < 5*24*time.Hour {
 		log.Println("Cannot send week, because it's the running week!")
 		return ErrRunningWeek
 	}
-	qStr, err := DB.Prepare(`INSERT INTO wochen_report (personal_nummer, woche_start) VALUES ($1, $2);`)
-	if err != nil {
-		log.Println("Error preparing SQL statement", err)
-		return err
+	if w.CheckStatus() != None {
+		qStr, err = DB.Prepare(`UPDATE "wochen_report" SET bestaetigt = FALSE WHERE personal_nummer = $1 AND woche_start = $2;`)
+		if err != nil {
+			log.Println("Error preparing SQL statement", err)
+			return err
+		}
+	} else {
+		qStr, err = DB.Prepare(`INSERT INTO wochen_report (personal_nummer, woche_start) VALUES ($1, $2);`)
+		if err != nil {
+			log.Println("Error preparing SQL statement", err)
+			return err
+		}
 	}
 	_, err = qStr.Exec(w.User.PersonalNummer, w.WeekStart)
 	if err != nil {