feat: add skip segment overrides backend

internal/db/skip_segment_overrides.go

@@ -0,0 +1,70 @@
+package db
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+)
+
+type SkipSegmentOverride struct {
+	ID        string
+	UserID    string
+	AnimeID   int64
+	Episode   int64
+	SkipType  string
+	StartTime float64
+	EndTime   float64
+}
+
+func (q *Queries) ListSkipSegmentOverrides(ctx context.Context, userID string, animeID int64, episode int64) ([]SkipSegmentOverride, error) {
+	const query = `
+SELECT id, user_id, anime_id, episode, skip_type, start_time, end_time
+FROM skip_segment_override
+WHERE user_id = ? AND anime_id = ? AND episode = ?
+ORDER BY skip_type ASC;
+`
+	rows, err := q.db.QueryContext(ctx, query, userID, animeID, episode)
+	if err != nil {
+		return nil, fmt.Errorf("list skip segment overrides: %w", err)
+	}
+	defer func() { _ = rows.Close() }()
+
+	var out []SkipSegmentOverride
+	for rows.Next() {
+		var r SkipSegmentOverride
+		if err := rows.Scan(&r.ID, &r.UserID, &r.AnimeID, &r.Episode, &r.SkipType, &r.StartTime, &r.EndTime); err != nil {
+			return nil, fmt.Errorf("scan skip segment override: %w", err)
+		}
+		out = append(out, r)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, fmt.Errorf("iterate skip segment overrides: %w", err)
+	}
+	return out, nil
+}
+
+func (q *Queries) UpsertSkipSegmentOverride(ctx context.Context, r SkipSegmentOverride) error {
+	const query = `
+INSERT INTO skip_segment_override (id, user_id, anime_id, episode, skip_type, start_time, end_time)
+VALUES (?, ?, ?, ?, ?, ?, ?)
+ON CONFLICT(user_id, anime_id, episode, skip_type) DO UPDATE SET
+  start_time = excluded.start_time,
+  end_time = excluded.end_time,
+  updated_at = CURRENT_TIMESTAMP;
+`
+	_, err := q.db.ExecContext(ctx, query, r.ID, r.UserID, r.AnimeID, r.Episode, r.SkipType, r.StartTime, r.EndTime)
+	if err != nil {
+		return fmt.Errorf("upsert skip segment override: %w", err)
+	}
+	return nil
+}
+
+func (q *Queries) HasSkipSegmentOverrideTable(ctx context.Context) (bool, error) {
+	// Defensive: in case migrations haven’t run yet in some env.
+	const query = `SELECT name FROM sqlite_master WHERE type='table' AND name='skip_segment_override' LIMIT 1;`
+	var name sql.NullString
+	if err := q.db.QueryRowContext(ctx, query).Scan(&name); err != nil {
+		return false, fmt.Errorf("check skip segment override table: %w", err)
+	}
+	return name.Valid && name.String != "", nil
+}