package org.openrs2.archive.key

import org.openrs2.crypto.SymmetricKey
import java.io.InputStream

public object TextKeyReader : KeyReader {
    override fun read(input: InputStream): Sequence<SymmetricKey> {
        val reader = input.bufferedReader()

        val k0 = reader.readLine()?.toIntOrNull() ?: return emptySequence()
        val k1 = reader.readLine()?.toIntOrNull() ?: return emptySequence()
        val k2 = reader.readLine()?.toIntOrNull() ?: return emptySequence()
        val k3 = reader.readLine()?.toIntOrNull() ?: return emptySequence()

        return sequenceOf(SymmetricKey(k0, k1, k2, k3))
    }
}