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/*
* This file is part of LibEuFin.
* Copyright (C) 2024 Taler Systems S.A.
* LibEuFin is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation; either version 3, or
* (at your option) any later version.
* LibEuFin 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 Affero General
* Public License for more details.
* You should have received a copy of the GNU Affero General Public
* License along with LibEuFin; see the file COPYING. If not, see
* <http://www.gnu.org/licenses/>
*/
package tech.libeufin.common
import java.math.BigInteger
import java.util.*
import java.util.zip.DeflaterInputStream
import java.util.zip.InflaterInputStream
import java.util.zip.ZipInputStream
import java.io.FilterInputStream
import java.io.InputStream
import java.io.ByteArrayOutputStream
import kotlin.random.Random
/* ----- String ----- */
fun String.decodeBase64(): ByteArray = Base64.getDecoder().decode(this)
fun String.decodeUpHex(): ByteArray = HexFormat.of().withUpperCase().parseHex(this)
fun String.splitOnce(pat: String): Pair<String, String>? {
val split = split(pat, limit=2)
if (split.size != 2) return null
return Pair(split[0], split[1])
}
/* ----- BigInteger -----*/
fun BigInteger.encodeHex(): String = this.toByteArray().encodeHex()
fun BigInteger.encodeBase64(): String = this.toByteArray().encodeBase64()
/* ----- ByteArray ----- */
fun ByteArray.rand(): ByteArray {
Random.nextBytes(this)
return this
}
fun ByteArray.encodeHex(): String = HexFormat.of().formatHex(this)
fun ByteArray.encodeUpHex(): String = HexFormat.of().withUpperCase().formatHex(this)
fun ByteArray.encodeBase64(): String = Base64.getEncoder().encodeToString(this)
/* ----- InputStream ----- */
/** Unzip an input stream and run [lambda] over each entry */
inline fun InputStream.unzipEach(lambda: (String, InputStream) -> Unit) {
ZipInputStream(this).use { zip ->
while (true) {
val entry = zip.getNextEntry()
if (entry == null) break
val entryStream = object: FilterInputStream(zip) {
override fun close() {
zip.closeEntry()
}
}
lambda(entry.name, entryStream)
}
}
}
/** Decode a base64 an input stream */
fun InputStream.decodeBase64(): InputStream
= Base64.getDecoder().wrap(this)
/** Decode a base64 an input stream */
fun InputStream.encodeBase64(): String {
val w = ByteArrayOutputStream()
val encoded = Base64.getEncoder().wrap(w)
transferTo(encoded)
encoded.close()
return w.toString(Charsets.UTF_8)
}
/** Deflate an input stream */
fun InputStream.deflate(): DeflaterInputStream
= DeflaterInputStream(this)
/** Inflate an input stream */
fun InputStream.inflate(): InflaterInputStream
= InflaterInputStream(this)
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