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package favourites
import (
"context"
"errors"
"fmt"
"github.com/LMBishop/confplanner/pkg/database/sqlc"
"github.com/jackc/pgx/v5"
"github.com/jackc/pgx/v5/pgtype"
"github.com/jackc/pgx/v5/pgxpool"
)
type Service interface {
GetFavouritesForUser(id int32) (*[]sqlc.Favourite, error)
CreateFavouriteForUser(id int32, eventGuid pgtype.UUID, eventId *int32) (*sqlc.Favourite, error)
DeleteFavouriteForUserByEventDetails(id int32, eventGuid pgtype.UUID, eventId *int32) error
}
var (
ErrImproperType = errors.New("improper type")
ErrNotFound = errors.New("not found")
)
type service struct {
pool *pgxpool.Pool
}
func NewService(pool *pgxpool.Pool) Service {
return &service{
pool: pool,
}
}
func (s *service) CreateFavouriteForUser(id int32, eventGuid pgtype.UUID, eventId *int32) (*sqlc.Favourite, error) {
queries := sqlc.New(s.pool)
var pgEventId pgtype.Int4
if eventId != nil {
pgEventId = pgtype.Int4{
Int32: *eventId,
Valid: true,
}
}
favourite, err := queries.CreateFavourite(context.Background(), sqlc.CreateFavouriteParams{
UserID: id,
EventGuid: eventGuid,
EventID: pgEventId,
})
if err != nil {
return nil, fmt.Errorf("could not create favourite: %w", err)
}
return &favourite, nil
}
func (s *service) GetFavouritesForUser(id int32) (*[]sqlc.Favourite, error) {
queries := sqlc.New(s.pool)
favourites, err := queries.GetFavouritesForUser(context.Background(), id)
if err != nil {
if errors.Is(err, pgx.ErrNoRows) {
empty := make([]sqlc.Favourite, 0)
return &empty, nil
}
return nil, fmt.Errorf("could not fetch user: %w", err)
}
return &favourites, nil
}
func (s *service) DeleteFavouriteForUserByEventDetails(id int32, eventGuid pgtype.UUID, eventId *int32) error {
queries := sqlc.New(s.pool)
var pgEventId pgtype.Int4
if eventId != nil {
pgEventId = pgtype.Int4{
Int32: *eventId,
Valid: true,
}
}
rowsAffected, err := queries.DeleteFavouriteByEventDetails(context.Background(), sqlc.DeleteFavouriteByEventDetailsParams{
EventGuid: eventGuid,
EventID: pgEventId,
UserID: id,
})
if err != nil {
return fmt.Errorf("could not delete favourite: %w", err)
}
if rowsAffected == 0 {
return ErrNotFound
}
return nil
}
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