74 lines
1.9 KiB
Go
74 lines
1.9 KiB
Go
package repository
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import (
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"context"
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"fmt"
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)
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// ReorderPrograms sets sort_order to 1..n in the given order (transactional).
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func (s *Store) ReorderPrograms(ctx context.Context, orderedIDs []int64) error {
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tx, err := s.conn.Begin(ctx)
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if err != nil {
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return err
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}
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defer func() { _ = tx.Rollback(ctx) }()
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for i, id := range orderedIDs {
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tag, err := tx.Exec(ctx, `UPDATE programs SET sort_order = $1, updated_at = CURRENT_TIMESTAMP WHERE id = $2`, int32(i+1), id)
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if err != nil {
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return err
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}
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if tag.RowsAffected() == 0 {
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return fmt.Errorf("program id %d not found", id)
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}
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}
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return tx.Commit(ctx)
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}
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// ReorderCoursesInProgram sets sort_order for courses under programID (transactional).
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func (s *Store) ReorderCoursesInProgram(ctx context.Context, programID int64, orderedIDs []int64) error {
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tx, err := s.conn.Begin(ctx)
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if err != nil {
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return err
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}
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defer func() { _ = tx.Rollback(ctx) }()
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for i, id := range orderedIDs {
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tag, err := tx.Exec(ctx, `
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UPDATE courses
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SET sort_order = $1,
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updated_at = CURRENT_TIMESTAMP
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WHERE id = $2
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AND program_id = $3`, int32(i+1), id, programID)
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if err != nil {
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return err
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}
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if tag.RowsAffected() == 0 {
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return fmt.Errorf("course id %d not in program %d", id, programID)
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}
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}
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return tx.Commit(ctx)
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}
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// ReorderModulesInCourse sets sort_order for modules under courseID (transactional).
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func (s *Store) ReorderModulesInCourse(ctx context.Context, courseID int64, orderedIDs []int64) error {
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tx, err := s.conn.Begin(ctx)
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if err != nil {
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return err
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}
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defer func() { _ = tx.Rollback(ctx) }()
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for i, id := range orderedIDs {
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tag, err := tx.Exec(ctx, `
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UPDATE modules
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SET sort_order = $1,
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updated_at = CURRENT_TIMESTAMP
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WHERE id = $2
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AND course_id = $3`, int32(i+1), id, courseID)
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if err != nil {
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return err
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}
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if tag.RowsAffected() == 0 {
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return fmt.Errorf("module id %d not in course %d", id, courseID)
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}
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}
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return tx.Commit(ctx)
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}
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