2 * Sone - L10nFilter.kt - Copyright © 2010–2020 David Roden
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 3 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 package net.pterodactylus.sone.freenet
20 import net.pterodactylus.util.template.*
24 * [Filter] implementation replaces [String] values with their
25 * translated equivalents.
27 class L10nFilter(private val translation: Translation) : Filter {
29 override fun format(templateContext: TemplateContext?, data: Any?, parameters: Map<String, Any>?): String {
30 val parameterValues = getParameters(data, parameters)
31 val text = getText(data)
32 return if (parameterValues.isEmpty()) {
33 translation.translate(text)
35 MessageFormat(translation.translate(text), translation.currentLocale).format(parameterValues.toTypedArray())
38 private fun getText(data: Any?) = (data as? L10nText)?.text ?: data.toString()
40 private fun getParameters(data: Any?, parameters: Map<String, Any>?) =
44 (parameters ?: emptyMap()).let { params ->
45 generateSequence(0) { it + 1 }
46 .takeWhile { it.toString() in params }
47 .map { params[it.toString()] }