/
tier.go
93 lines (70 loc) · 1.82 KB
/
tier.go
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package postgres
import (
"database/sql"
"errors"
tournament "github.com/ejacobg/tourney-tracker"
)
// TierService represents a service for managing tiers.
type TierService struct {
DB *sql.DB
}
func (ts TierService) GetTiers() (tiers []tournament.Tier, err error) {
query := `
SELECT id, name, multiplier
FROM tiers`
rows, err := ts.DB.Query(query)
if err != nil {
return
}
defer rows.Close()
for rows.Next() {
var tier tournament.Tier
err = rows.Scan(&tier.ID, &tier.Name, &tier.Multiplier)
if err != nil {
return
}
tiers = append(tiers, tier)
}
return tiers, rows.Err()
}
func (ts TierService) GetTier(id int64) (tier tournament.Tier, err error) {
query := `
SELECT id, name, multiplier
FROM tiers
WHERE id = $1`
err = ts.DB.QueryRow(query, id).Scan(&tier.ID, &tier.Name, &tier.Multiplier)
if err != nil && errors.Is(err, sql.ErrNoRows) {
err = ErrRecordNotFound
}
return
}
func (ts TierService) GetTournamentTier(tournamentID int64) (tier tournament.Tier, _ error) {
query := `
SELECT tiers.id, tiers.name, multiplier
FROM tournaments
INNER JOIN tiers on tournaments.tier_id = tiers.id
WHERE tournaments.id = $1`
return tier, ts.DB.QueryRow(query, tournamentID).Scan(&tier.ID, &tier.Name, &tier.Multiplier)
}
func (ts TierService) CreateTier(tier *tournament.Tier) error {
query := `
INSERT INTO tiers (name, multiplier)
VALUES ($1, $2)
RETURNING id`
err := ts.DB.QueryRow(query, tier.Name, tier.Multiplier).Scan(&tier.ID)
return err
}
func (ts TierService) UpdateTier(tier *tournament.Tier) error {
query := `UPDATE tiers
SET name = $2, multiplier = $3
WHERE id = $1`
_, err := ts.DB.Exec(query, tier.ID, tier.Name, tier.Multiplier)
return err
}
func (ts TierService) DeleteTier(id int64) error {
query := `
DELETE FROM tiers
WHERE id = $1`
_, err := ts.DB.Exec(query, id)
return err
}