load.go

func LoadAllPrintings(allPrintingsPath string) error {
	allPrintingsReader, err := os.Open(allPrintingsPath)
	if err != nil {
		return err
	}
	defer allPrintingsReader.Close()

	dec := json.NewDecoder(allPrintingsReader)
	_, err = dec.Token()
	if err != nil {
		return err
	}

	for dec.More() {
		val, err := dec.Token()
		if err != nil {
			return err
		}

		set, ok := val.(string)
		if ok {
			var edition struct {
				Name  string      `json:"name"`
				Cards []CardEntry `json:"cards"`
			}
			err = dec.Decode(&edition)
			if err != nil {
				return err
			}

			AllPrintingsDB[set] = edition.Cards
			SetNameToCode[edition.Name] = set
		}
	}

	return nil
}