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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 {
GetAllFavouritesForUser(id int32) (*[]sqlc.Favourite, error)
GetFavouritesForUserConference(id int32, conference int32) (*[]sqlc.Favourite, error)
CreateFavouriteForUser(id int32, eventGUID pgtype.UUID, eventID *int32, conferenceID int32) (*sqlc.Favourite, error)
DeleteFavouriteForUserByEventDetails(id int32, eventGUID pgtype.UUID, eventID *int32, conferenceID 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(userID int32, eventGUID pgtype.UUID, eventID *int32, conferenceID 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: userID,
EventGuid: eventGUID,
EventID: pgEventID,
ConferenceID: conferenceID,
})
if err != nil {
return nil, fmt.Errorf("could not create favourite: %w", err)
}
return &favourite, nil
}
func (s *service) GetAllFavouritesForUser(userID int32) (*[]sqlc.Favourite, error) {
queries := sqlc.New(s.pool)
favourites, err := queries.GetFavouritesForUser(context.Background(), userID)
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) GetFavouritesForUserConference(userID int32, conferenceID int32) (*[]sqlc.Favourite, error) {
queries := sqlc.New(s.pool)
favourites, err := queries.GetFavouritesForUserConference(context.Background(), sqlc.GetFavouritesForUserConferenceParams{
UserID: userID,
ConferenceID: conferenceID,
})
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, conferenceID 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,
ConferenceID: conferenceID,
})
if err != nil {
return fmt.Errorf("could not delete favourite: %w", err)
}
if rowsAffected == 0 {
return ErrNotFound
}
return nil
}
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