CHANGE: added personaldaten db and auto logout function

Backend/models/user.go

@@ -0,0 +1,66 @@
+package models
+
+import (
+	"fmt"
+)
+
+type User struct {
+	CardUID                 string
+	Name                    string
+	Vorname                 string
+	HauptbeschaeftigungsOrt int8
+}
+
+func (u *User) GetAll() ([]User, error) {
+	qStr, err := DB.Prepare((`SELECT card_uid, vorname, nachname, hauptbeschaeftigung_ort FROM personal_daten;`))
+	var users []User
+	if err != nil {
+		fmt.Printf("Error preparing query statement %v\n", err)
+		return users, err
+	}
+	defer qStr.Close()
+	rows, err := qStr.Query()
+	if err != nil {
+		return users, err
+	}
+	defer rows.Close()
+	for rows.Next() {
+		var user User
+		if err := rows.Scan(&user.CardUID, &user.Vorname, &user.Name, &user.HauptbeschaeftigungsOrt); err != nil {
+			return users, nil
+		}
+		users = append(users, user)
+	}
+	if err = rows.Err(); err != nil {
+		return users, nil
+	}
+	return users, nil
+}
+
+// Returns true if there is a booking 1 for today -> meaning the user is at work
+// Returns false if there is no booking today or the user is already booked out of the system
+func (u *User) CheckAnwesenheit() bool {
+	qStr, err := DB.Prepare((`SELECT check_in_out FROM anwesenheit WHERE card_uid = $1 AND "timestamp" >= now()::date + interval '1h' ORDER BY "timestamp" DESC`))
+	if err != nil {
+		fmt.Printf("Error preparing query statement %v\n", err)
+		return false
+	}
+	defer qStr.Close()
+	var check_in_out int
+	err = qStr.QueryRow(u.CardUID).Scan(&check_in_out)
+	if err != nil {
+		return false
+	}
+	return check_in_out == 1
+}
+
+// Creates a new booking for the user -> check_in_out will be 255 for automatic check out
+func (u *User) Logout() error {
+	booking := (*Booking).New(nil, u.CardUID, 0, 255)
+	err := booking.Insert()
+	if err != nil {
+		fmt.Printf("Error inserting booking %v\n", err)
+		return err
+	}
+	return nil
+}