MerchantUnit.kt

/*
 * This file is part of GNU Taler
 * (C) 2026 Taler Systems S.A.
 *
 * GNU Taler is free software; you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 3, or (at your option) any later version.
 *
 * GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
 */

package net.taler.merchantlib

import kotlinx.serialization.SerialName
import kotlinx.serialization.Serializable
import java.util.Locale

@Serializable
data class MerchantUnitsResponse(val units: List<MerchantUnit>)

@Serializable
data class MerchantUnit(
    val unit: String,
    @SerialName("unit_name_short") val nameShort: String,
    @SerialName("unit_name_short_i18n") val nameShortI18n: Map<String, String>? = null,
    @SerialName("unit_precision_level") val precision: Int = 0,
) {
    fun shortLabel(locale: Locale = Locale.getDefault()): String {
        val translations = nameShortI18n.orEmpty().mapKeys { it.key.replace('_', '-').lowercase(Locale.ROOT) }
        var tag = locale.toLanguageTag().lowercase(Locale.ROOT)
        while (tag.isNotEmpty()) {
            translations[tag]?.takeIf(String::isNotBlank)?.let { return it }
            tag = tag.substringBeforeLast('-', "")
        }
        return nameShort.takeIf(String::isNotBlank) ?: unit
    }
}