70 lines
1.8 KiB
Go
70 lines
1.8 KiB
Go
package store
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import (
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"context"
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"errors"
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"github.com/jackc/pgconn"
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"github.com/jackc/pgerrcode"
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)
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// AddContact creates a contact relation or returns ErrDuplicate if it exists.
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func (s *Store) AddContact(ctx context.Context, ownerID, contactID int64) error {
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_, err := s.pool.Exec(ctx, `
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INSERT INTO contacts(owner_id, contact_id)
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VALUES($1, $2)
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`, ownerID, contactID)
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if err != nil {
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var pgErr *pgconn.PgError
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if errors.As(err, &pgErr) && pgErr.Code == pgerrcode.UniqueViolation {
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return ErrDuplicate
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}
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}
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return err
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}
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// RemoveContact deletes a contact relation; no error if not present.
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func (s *Store) RemoveContact(ctx context.Context, ownerID, contactID int64) error {
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_, err := s.pool.Exec(ctx, `
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DELETE FROM contacts WHERE owner_id=$1 AND contact_id=$2
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`, ownerID, contactID)
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return err
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}
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// ListContacts returns all contacts for an owner ordered by created_at descending.
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func (s *Store) ListContacts(ctx context.Context, ownerID int64) ([]Contact, error) {
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rows, err := s.pool.Query(ctx, `
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SELECT owner_id, contact_id, created_at
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FROM contacts WHERE owner_id=$1
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ORDER BY created_at DESC
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`, ownerID)
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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var list []Contact
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for rows.Next() {
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var c Contact
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if err := rows.Scan(&c.OwnerID, &c.ContactID, &c.CreatedAt); err != nil {
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return nil, err
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}
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list = append(list, c)
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}
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return list, nil
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}
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// IsContact reports whether a contact relation exists.
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func (s *Store) IsContact(ctx context.Context, ownerID, contactID int64) (bool, error) {
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var exists bool
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err := s.pool.QueryRow(ctx, `
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SELECT EXISTS(
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SELECT 1 FROM contacts WHERE owner_id=$1 AND contact_id=$2
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)
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`, ownerID, contactID).Scan(&exists)
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if err != nil {
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return false, err
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}
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return exists, nil
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}
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