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package com.walkerselby.wheelchair.client
import it.unimi.dsi.fastutil.ints.Int2ObjectMap
import net.minecraft.item.ItemStack
import net.minecraft.network.packet.Packet
import net.minecraft.text.Text
import java.lang.reflect.Field
import java.lang.reflect.Modifier
val Field.isStatic: Boolean
get() = (modifiers and Modifier.STATIC) != 0
interface Printer {
fun emitName(value: String)
fun emitValue(value: String)
fun beginObject(label: String): Printer
fun beginList(label: String): Printer
}
class AccumulatingPrinter(
val indent: Int,
val stringBuilder: StringBuilder,
val isListBuilder: Boolean,
) : Printer {
fun appendIndent() {
stringBuilder.append(" ".repeat(indent))
}
override fun emitName(value: String) {
if (isListBuilder) {
error("Cannot print name within a list")
}
appendIndent()
stringBuilder.append(value)
stringBuilder.append(": ")
}
override fun emitValue(value: String) {
if (isListBuilder)
stringBuilder.append("* ")
else
stringBuilder.append("")
stringBuilder.append(value)
stringBuilder.append("\n")
}
override fun beginObject(label: String): Printer {
if (isListBuilder) {
stringBuilder.append("* $label:\n")
} else {
stringBuilder.append("$label\n")
}
return AccumulatingPrinter(indent + 2, stringBuilder, false)
}
override fun beginList(label: String): Printer {
if (isListBuilder) {
stringBuilder.append("* $label\n")
} else {
stringBuilder.append("$label:\n")
}
return AccumulatingPrinter(indent + 2, stringBuilder, true)
}
}
fun interface Formatter<T> {
fun prettyPrint(subject: T, printer: Printer)
companion object {
private val formatters = mutableMapOf<Class<*>, Formatter<*>>()
private val dynamicFormatter = mutableListOf<(Class<*>) -> Formatter<*>?>()
private val processing = mutableSetOf<Class<*>>()
fun <V> putFormatter(clazz: Class<V>, formatter: Formatter<V>) {
formatters[clazz] = formatter
}
fun <V> putFormatter(function: (Class<in V>) -> Formatter<V>?) {
dynamicFormatter.add(function as ((Class<*>) -> Formatter<*>))
}
init {
putFormatter(
java.lang.Integer.TYPE
) { subject, printer -> printer.emitValue(subject.toString()) }
putFormatter(
java.lang.Integer::class.java
) { subject, printer -> printer.emitValue(subject.toString()) }
putFormatter(
String::class.java
) { subject, printer -> printer.emitValue(subject) }
putFormatter(
ItemStack::class.java
) { subject, printer -> printer.emitValue("${subject.count}x${subject.name.string}§r") }
putFormatter {
if (Int2ObjectMap::class.java.isAssignableFrom(it)) {
return@putFormatter object : Formatter<Int2ObjectMap<*>> {
override fun prettyPrint(subject: Int2ObjectMap<*>, printer: Printer) {
val child = printer.beginObject("Int2ObjectMap (length=${subject.size})")
subject.forEach { (k, v) ->
val valueFormatter = getPrettyPrinter(v.javaClass)
child.emitName(k.toString())
valueFormatter.prettyPrint(v, child)
}
}
}
}
return@putFormatter null
}
}
class LazyFormatter<T>(val clazz: Class<T>) : Formatter<T> {
override fun prettyPrint(subject: T, printer: Printer) {
(formatters[clazz] as Formatter<T>).prettyPrint(subject, printer)
}
}
fun prettyPrintPacket(packet: Packet<*>): Text {
val sb = StringBuilder()
getPrettyPrinter(packet.javaClass).prettyPrint(packet, AccumulatingPrinter(0, sb, false))
return Text.literal(sb.toString())
}
fun <T> getPrettyPrinter(clazz: Class<T>): Formatter<T> {
if (clazz in processing) {
return LazyFormatter(clazz)
}
if (clazz.isEnum) {
return object : Formatter<T> {
override fun prettyPrint(subject: T, printer: Printer) {
printer.emitValue(subject.toString())
}
}
}
return formatters.getOrPut(clazz) {
try {
processing.add(clazz)
val dynamic = dynamicFormatter.firstNotNullOfOrNull { dynamic -> dynamic(clazz) }
if (dynamic != null) {
return@getOrPut dynamic
}
val fields = clazz.declaredFields
.filter { !it.isStatic }
.onEach { it.isAccessible = true }
.associateWith { getPrettyPrinter(it.type) }
val name = clazz.simpleName // TODO: remapping
object : Formatter<T> {
override fun prettyPrint(subject: T, printer: Printer) {
val child = printer.beginObject(name)
fun <V> printField(value: V, formatter: Formatter<V>) {
formatter.prettyPrint(value, child)
}
for ((field, fieldFormatter) in fields) {
val value = field.get(subject)
child.emitName(field.name) // TODO: remapping
// We love `Nothing` being unable to be cast away
printField(value as Any, fieldFormatter as Formatter<Any>)
}
}
}
} finally {
processing.remove(clazz)
}
} as Formatter<T>
}
}
}
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