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package moe.nea.shot
import org.objectweb.asm.ClassReader
import org.objectweb.asm.ClassWriter
import java.io.Serializable
import java.nio.file.Files
import java.nio.file.Path
import java.util.zip.ZipFile
import java.util.zip.ZipOutputStream
import kotlin.io.path.createDirectories
import kotlin.io.path.exists
data class Shots(
val injections: Map<ClassRef, ClassShots>,
) : Serializable {
fun processEntry(toInject: ClassShots, bytes: ByteArray): ByteArray {
val classReader = ClassReader(bytes)
val classWriter = ClassWriter(0)
val visitor = InjectionApplicator(toInject, classWriter)
classReader.accept(visitor, 0)
return classWriter.toByteArray()
}
fun processZipFile(input: ZipFile, output: ZipOutputStream) {
for (entry in input.entries()) {
val classRef = ClassRef.fromPath(entry.name)
val toInject = classRef?.let(injections::get)
output.putNextEntry(entry)
if (toInject == null) {
input.getInputStream(entry).copyTo(output)
} else {
val bytes = input.getInputStream(entry).use { it.readBytes() }
val modifiedBytes = processEntry(toInject, bytes)
output.write(modifiedBytes)
}
}
}
/**
* Run on an extracted zip, (or alternatively, a jar file systems root path)
*/
fun process(sourceFiles: Path, targetFiles: Path) {
for ((classRef, toInject) in injections.entries) {
val classSource = sourceFiles.resolve(classRef.path)
val classTarget = targetFiles.resolve(classRef.path)
if (!classSource.exists()) {
continue
}
classTarget.parent.createDirectories()
Files.write(classTarget, processEntry(toInject, Files.readAllBytes(classSource)))
}
}
}
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