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Diffstat (limited to 'taler-kotlin-common/src/main/java/net/taler/common/TalerUtils.kt')
-rw-r--r-- | taler-kotlin-common/src/main/java/net/taler/common/TalerUtils.kt | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/taler-kotlin-common/src/main/java/net/taler/common/TalerUtils.kt b/taler-kotlin-common/src/main/java/net/taler/common/TalerUtils.kt new file mode 100644 index 0000000..cb1622e --- /dev/null +++ b/taler-kotlin-common/src/main/java/net/taler/common/TalerUtils.kt @@ -0,0 +1,51 @@ +/* + * This file is part of GNU Taler + * (C) 2020 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.common + +import androidx.annotation.RequiresApi +import androidx.core.os.LocaleListCompat +import java.util.* +import kotlin.collections.ArrayList + +object TalerUtils { + + @RequiresApi(26) + fun getLocalizedString(map: Map<String, String>?, default: String): String { + // just return the default, if it is the only element + if (map == null) return default + // create a priority list of language ranges from system locales + val locales = LocaleListCompat.getDefault() + val priorityList = ArrayList<Locale.LanguageRange>(locales.size()) + for (i in 0 until locales.size()) { + priorityList.add(Locale.LanguageRange(locales[i].toLanguageTag())) + } + // create a list of locales available in the given map + val availableLocales = map.keys.mapNotNull { + if (it == "_") return@mapNotNull null + val list = it.split("_") + when (list.size) { + 1 -> Locale(list[0]) + 2 -> Locale(list[0], list[1]) + 3 -> Locale(list[0], list[1], list[2]) + else -> null + } + } + val match = Locale.lookup(priorityList, availableLocales) + return match?.toString()?.let { map[it] } ?: default + } + +} |