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|
package guest
import (
"context"
"errors"
"github.com/jackc/pgx/v5/pgxpool"
)
type MemStore struct {
db *pgxpool.Pool
}
func NewMemStore(db *pgxpool.Pool) *MemStore {
return &MemStore{
db,
}
}
func (m MemStore) Find(creds Credentials) (Guest, error) {
rows, err := m.db.Query(context.Background(), "select * from guest")
var guest Guest
if err != nil {
return guest, err
}
defer rows.Close()
found := false
for rows.Next() {
err := rows.Scan(&guest.Id, &guest.FirstName, &guest.LastName, &guest.Attendance, &guest.Email, &guest.Message, &guest.PartySize)
if err != nil {
return guest, err
}
if guest.FirstName == creds.FirstName && guest.LastName == creds.LastName {
found = true
break
}
}
rows, err = m.db.Query(context.Background(), "select * from party")
if err != nil {
return guest, err
}
defer rows.Close()
for rows.Next() {
var guestId int
var partyGuest PartyGuest
err := rows.Scan(&guestId, &partyGuest.FirstName, &partyGuest.LastName)
if err != nil {
return guest, err
}
if guestId == guest.Id {
guest.PartyList = append(guest.PartyList, partyGuest)
}
}
if found {
return guest, nil
}
return guest, errors.New("Guest not found")
}
func (m MemStore) Get() ([]Guest, error) {
rows, err := m.db.Query(context.Background(), "select * from guest")
if err != nil {
return nil, err
}
defer rows.Close()
guestSlice := []Guest{}
for rows.Next() {
var guest Guest
err := rows.Scan(&guest.Id, &guest.FirstName, &guest.LastName, &guest.Attendance, &guest.Email, &guest.Message, &guest.PartySize)
if err != nil {
return guestSlice, err
}
guestSlice = append(guestSlice, guest)
}
rows, err = m.db.Query(context.Background(), "select * from party")
if err != nil {
return guestSlice, err
}
defer rows.Close()
for rows.Next() {
var guestId int
var partyGuest PartyGuest
err := rows.Scan(&guestId, &partyGuest.FirstName, &partyGuest.LastName)
if err != nil {
return guestSlice, err
}
for i, g := range guestSlice {
if guestId == g.Id {
guestSlice[i].PartyList = append(g.PartyList, partyGuest)
}
}
}
return guestSlice, nil
}
func (m MemStore) Add(guest Guest) error {
statement := "insert into guest (id, first_name, last_name, attendance, email, message, party_size) values ($1, $2, $3, $4, $5, $6, $7)"
_, err := m.db.Exec(context.Background(), statement, guest.Id, guest.FirstName, guest.LastName, guest.Attendance, guest.Email, guest.Message, guest.PartySize)
if err != nil {
return err
}
statement = "insert into party (guest_id, first_name, last_name) values ($1, $2, $3)"
for _, pg := range guest.PartyList {
_, err = m.db.Exec(context.Background(), statement, guest.Id, pg.FirstName, pg.LastName)
if err != nil {
return err
}
}
return nil
}
func (m MemStore) Update(guest Guest) error {
statement := "update guest set attendance = $1, email = $2, message = $3, party_size = $4 where id = $5"
_, err := m.db.Exec(context.Background(), statement, guest.Attendance, guest.Email, guest.Message, guest.PartySize, guest.Id)
if err != nil {
return err
}
statement = "delete from party where guest_id = $1"
_, err = m.db.Exec(context.Background(), statement, guest.Id)
if err != nil {
return err
}
statement = "insert into party (guest_id, first_name, last_name) values ($1, $2, $3)"
for _, pg := range guest.PartyList {
_, err = m.db.Exec(context.Background(), statement, guest.Id, pg.FirstName, pg.LastName)
if err != nil {
return err
}
}
return nil
}
|
