/*
* Sone - L10nFilter.kt - Copyright © 2010–2020 David Roden
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see .
*/
package net.pterodactylus.sone.freenet
import net.pterodactylus.util.template.*
import java.text.*
/**
* [Filter] implementation replaces [String] values with their
* translated equivalents.
*/
class L10nFilter(private val translation: Translation) : Filter {
override fun format(templateContext: TemplateContext?, data: Any?, parameters: Map?): String {
val parameterValues = getParameters(data, parameters)
val text = getText(data)
return if (parameterValues.isEmpty()) {
translation.translate(text)
} else
MessageFormat(translation.translate(text), translation.currentLocale).format(parameterValues.toTypedArray())
}
private fun getText(data: Any?) = (data as? L10nText)?.text ?: data.toString()
private fun getParameters(data: Any?, parameters: Map?) =
if (data is L10nText)
data.parameters
else
(parameters ?: emptyMap()).let { params ->
generateSequence(0) { it + 1 }
.takeWhile { it.toString() in params }
.map { params[it.toString()] }
.toList()
}
}