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package org.apache.james.jmap.draft.utils.quotas;

import java.util.Optional;

import org.apache.james.core.quota.QuotaLimitValue;
import org.apache.james.core.quota.QuotaUsageValue;
import org.apache.james.jmap.draft.model.Number;
import org.apache.james.jmap.draft.model.mailbox.Quotas;
import org.apache.james.mailbox.exception.MailboxException;
import org.apache.james.mailbox.model.MailboxPath;
import org.apache.james.mailbox.model.Quota;

public abstract class QuotaLoader {

    public abstract Quotas getQuotas(MailboxPath mailboxPath) throws MailboxException;

    protected <T extends QuotaLimitValue<T>, U extends QuotaUsageValue<U, T>> Quotas.Value<T, U> quotaToValue(Quota<T, U> quota) {
        return new Quotas.Value<>(
            quotaValueUsageToNumber(quota.getUsed()),
            quotaLimitValueToOptionalNumber(quota.getLimit()));
    }

    protected Number quotaValueToNumber(QuotaLimitValue<?> value) {
        return Number.BOUND_SANITIZING_FACTORY.from(value.asLong());
    }

    protected Number quotaValueUsageToNumber(QuotaUsageValue<?, ?> value) {
        return Number.BOUND_SANITIZING_FACTORY.from(value.asLong());
    }

    protected Optional<Number> quotaLimitValueToOptionalNumber(QuotaLimitValue<?> value) {
        if (value.isUnlimited()) {
            return Optional.empty();
        }
        return Optional.of(quotaValueToNumber(value));
    }
}
