feat: rps commands

internal/db/repos/rpsrepo/repo.go

@@ -0,0 +1,76 @@
+package rpsrepo
+
+import (
+	"context"
+	"database/sql"
+)
+
+type Repo struct {
+	db *sql.DB
+}
+
+func NewRepo(db *sql.DB) *Repo {
+	return &Repo{db: db}
+}
+
+func (r *Repo) GetScore(ctx context.Context, guildID int64, userID int64) (int, bool, error) {
+	var score int
+	err := r.db.QueryRowContext(ctx, `
+		SELECT score
+		FROM rps
+		WHERE guild_id = $1 AND user_id = $2
+	`, guildID, userID).Scan(&score)
+	if err == sql.ErrNoRows {
+		return 0, false, nil
+	}
+	if err != nil {
+		return 0, false, err
+	}
+	return score, true, nil
+}
+
+func (r *Repo) SetScore(ctx context.Context, guildID int64, userID int64, score int) error {
+	_, err := r.db.ExecContext(ctx, `
+		INSERT INTO rps (guild_id, user_id, score)
+		VALUES ($1, $2, $3)
+		ON CONFLICT (guild_id, user_id)
+		DO UPDATE SET score = EXCLUDED.score
+	`, guildID, userID, score)
+	return err
+}
+
+type ScoreEntry struct {
+	UserID int64
+	Score  int
+}
+
+func (r *Repo) TopScores(ctx context.Context, guildID int64, limit int) ([]ScoreEntry, error) {
+	if limit <= 0 {
+		limit = 10
+	}
+	rows, err := r.db.QueryContext(ctx, `
+		SELECT user_id, score
+		FROM rps
+		WHERE guild_id = $1
+		ORDER BY score DESC, user_id ASC
+		LIMIT $2
+	`, guildID, limit)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	out := make([]ScoreEntry, 0, limit)
+	for rows.Next() {
+		var e ScoreEntry
+		if err := rows.Scan(&e.UserID, &e.Score); err != nil {
+			return nil, err
+		}
+		out = append(out, e)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+