CHANGE: go debug working + seperated database and renam,ed module

Backend/models/booking.go

@@ -2,38 +2,58 @@ package models
 
 import (
 	"database/sql"
-	"fmt"
 	"log"
+	"net/url"
+	"strconv"
 )
 
-type Booking struct {
-	CradID      string `json:"cradID"`
-	ReaderID    string `json:"readerID"`
-	BookingType int `json:"bookingTyp"`
-}
-
 type SameBookingError struct{}
 
 func (e SameBookingError) Error() string {
 	return "the same booking already exists!"
 }
 
-func VerifyBooking(b Booking) bool {
-	if b.CradID == "" || b.ReaderID == "" || b.BookingType == 0 {
+type Booking struct {
+	CardID      string `json:"cradID"`
+	ReaderID    string `json:"readerID"`
+	BookingType int    `json:"bookingTyp"`
+}
+
+func (b Booking) New(card_id string, reader_id string, booking_type int) Booking {
+	return Booking{
+		CardID:      card_id,
+		ReaderID:    reader_id,
+		BookingType: booking_type,
+	}
+}
+
+func (b *Booking) FromUrlParams(params url.Values) Booking {
+	bookingType, err := strconv.Atoi(params.Get("bookingType"))
+	if err != nil {
+		log.Println("Error parsing bookingType: ", err)
+		return b.New("", "", 0)
+	}
+	cardID := params.Get("cardID")
+	readerID := params.Get("readerID")
+	return Booking{BookingType: bookingType, CardID: cardID, ReaderID: readerID}
+}
+
+func (b Booking) Verify() bool {
+	if b.CardID == "" || b.ReaderID == "" || b.BookingType == 0 {
 		return false
 	}
 	return true
 }
 
-func InsertBooking(b Booking, db *sql.DB) error {
+func (b Booking) Insert(db *sql.DB) error {
 	if !checkLastBooking(b, db) {
-		return fmt.Errorf("the same booking already exists")
-    }
+		return SameBookingError{}
+	}
 	stmt, err := db.Prepare((`INSERT INTO zeiten (card_id, reader_id, booking_type) VALUES ($1, $2, $3)`))
 	if err != nil {
 		return err
 	}
-	_, err = stmt.Query(b.CradID, b.ReaderID, b.BookingType)
+	_, err = stmt.Query(b.CardID, b.ReaderID, b.BookingType)
 	if err != nil {
 		return err
 	}
@@ -45,16 +65,16 @@ func checkLastBooking(b Booking, db *sql.DB) bool {
 	stmt, err := db.Prepare((`SELECT booking_type FROM "zeiten" WHERE "card_id" = $1 ORDER BY "logged_time" DESC LIMIT 1;`))
 	if err != nil {
 		log.Fatalf("Error preparing query: %v", err)
-        return false
-    }
-	err = stmt.QueryRow(b.CradID).Scan(&booking_type)
+		return false
+	}
+	err = stmt.QueryRow(b.CardID).Scan(&booking_type)
 	if err == sql.ErrNoRows {
 		return true
 	}
-	if err!= nil {
-        log.Println("Error checking last booking: ", err)
-        return false
-    }
+	if err != nil {
+		log.Println("Error checking last booking: ", err)
+		return false
+	}
 	if booking_type == b.BookingType {
 		return false
 	}