55 lines
1.7 KiB
Go
55 lines
1.7 KiB
Go
package analytics
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import (
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"context"
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"errors"
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"fmt"
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)
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var ErrUnknownTerminal = errors.New("analytics: unknown terminal")
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type Terminal struct {
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TerminalID string `json:"terminalId"`
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DisplayName string `json:"displayName"`
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SessionCount int64 `json:"sessionCount"`
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IsDefault bool `json:"isDefault"`
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}
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func (s *Service) Terminals(ctx context.Context, merchantID int64) ([]Terminal, error) {
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rows, err := s.pool.Query(ctx, `SELECT t.source_key,count(ps.id) FROM terminals t
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LEFT JOIN payment_sessions ps ON ps.terminal_id=t.id
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WHERE t.merchant_id=$1 GROUP BY t.id ORDER BY count(ps.id) DESC,t.source_key`, merchantID)
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if err != nil {
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return nil, fmt.Errorf("querying merchant terminals: %w", err)
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}
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defer rows.Close()
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terminals := make([]Terminal, 0, 8)
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for rows.Next() {
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var terminal Terminal
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if err := rows.Scan(&terminal.TerminalID, &terminal.SessionCount); err != nil {
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return nil, fmt.Errorf("scanning merchant terminal: %w", err)
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}
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terminal.DisplayName = terminalDisplayName(terminal.TerminalID)
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terminal.IsDefault = len(terminals) == 0
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terminals = append(terminals, terminal)
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}
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if err := rows.Err(); err != nil {
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return nil, fmt.Errorf("iterating merchant terminals: %w", err)
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}
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return terminals, nil
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}
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func (s *Service) validateTerminal(ctx context.Context, merchantID int64, terminalID string) error {
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if terminalID == "" {
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return nil
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}
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var exists bool
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if err := s.pool.QueryRow(ctx, `SELECT EXISTS(SELECT 1 FROM terminals WHERE merchant_id=$1 AND source_key=$2)`, merchantID, terminalID).Scan(&exists); err != nil {
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return fmt.Errorf("validating merchant terminal: %w", err)
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}
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if !exists {
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return ErrUnknownTerminal
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}
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return nil
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}
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