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package moe.nea89.website
import kotlinx.browser.window
import kotlinx.browser.document
import kotlinx.dom.addClass
import kotlinx.html.InputType
import kotlinx.html.dom.append
import kotlinx.html.dom.create
import kotlinx.html.js.input
import kotlinx.html.js.p
import kotlinx.html.js.pre
import kotlinx.html.js.span
import org.w3c.dom.HTMLElement
import org.w3c.dom.HTMLInputElement
import org.w3c.dom.HTMLParagraphElement
import org.w3c.dom.HTMLPreElement
import org.w3c.dom.events.EventType
import org.w3c.dom.events.KeyboardEvent
import org.w3c.dom.events.addEventHandler
import styled.injectGlobal
import kotlin.collections.set
class KConsole(
val root: HTMLElement,
val text: HTMLPreElement,
val prompt: HTMLElement,
fileSystem: KFileSystem?,
) {
private lateinit var uninjectKeyHandler: () -> Unit
val fileAccessor = fileSystem?.let { FileAccessor(it) }
var PS1: KConsole.() -> String = { "$" }
private lateinit var mobileInput: HTMLInputElement
companion object {
init {
injectGlobal(Styles.global)
}
val shlexRegex =
""""([^"\\]+|\\.)+"|([^ "'\\]+|\\.)+|'([^'\\]+|\\.)+'""".toRegex()
fun createFor(element: HTMLElement, fileSystem: KFileSystem? = null): KConsole {
val text = element.append.pre()
val prompt = text.append.p()
prompt.addClass(Styles.promptClass)
element.classList.add(Styles.consoleClass)
val console = KConsole(element, text, prompt, fileSystem)
console.uninjectKeyHandler =
document.body!!.addEventHandler(EventType("keydown"), console::keydown)
console.rerender()
return console
}
}
enum class ConsoleState {
SHELLPROMPT,
IN_PROGRAM
}
var state = ConsoleState.SHELLPROMPT
var input: String = ""
var justHandledInput = false
fun openMobileKeyboardOnTap() {
uninjectKeyHandler()
mobileInput = this.root.append.input(InputType.text)
mobileInput.classList.add(Styles.mobileFocusInput)
mobileInput.onkeyup = this::keydown
mobileInput.oninput = {
input += it.data
mobileInput.value = ""
justHandledInput = true
rerender()
scrollDown()
}
root.onclick = {
mobileInput.focus()
}
}
fun addLines(newLines: List<String>) {
newLines.forEach { addLine(it) }
}
fun addMultilineText(text: String) {
addLines(text.split("\n"))
}
fun addLine(vararg elements: Any) {
addLine(document.create.p().apply {
elements.forEach {
when (it) {
is HTMLElement -> append(it)
is ColoredElement -> append(document.create.span().also { el ->
el.style.color = it.color.color.toString()
el.append(it.text)
})
is String -> append(it)
else -> throw RuntimeException("Unknown element")
}
}
})
}
private fun addLine(element: HTMLParagraphElement) {
text.insertBefore(element, prompt)
}
fun rerender() {
if (state == KConsole.ConsoleState.SHELLPROMPT) {
prompt.innerText = "${PS1.invoke(this)} $input"
} else {
prompt.innerText = ""
}
}
fun scrollDown() {
text.lastElementChild?.scrollIntoView()
}
fun registerCommand(command: Command) {
command.aliases.forEach {
commands[it] = command
}
commands[command.name] = command
}
val commands = mutableMapOf<String, Command>()
fun executeCommand(commandLine: String) {
val parts = shlex(commandLine)
if (parts == null) {
addLine("Syntax Error")
return
}
if (parts.isEmpty()) {
return
}
val command = parts[0]
println("Running command: $command")
val arguments = parts.drop(1)
val commandThing = commands[command]
if (commandThing == null) {
addLine("Unknown command")
return
}
ShellExecutionContext.run(this, commandThing, command, arguments)
scrollDown()
}
fun shlex(command: String): List<String>? {
var i = 0
val parts = mutableListOf<String>()
while (i < command.length) {
val match = shlexRegex.matchAt(command, i)
if (match == null) {
println("Could not shlex: $command")
return null
}
// TODO: Proper string unescaping
parts.add(match.groupValues.drop(1).firstOrNull { it != "" } ?: "")
i += match.value.length
while (command[i] == ' ' && i < command.length)
i++
}
return parts
}
fun handleSubmit() {
val toExecute = input
addLine("${PS1.invoke(this)} $toExecute")
input = ""
executeCommand(toExecute)
}
fun keydown(event: KeyboardEvent) {
if (event.altKey || event.metaKey) return
if (event.ctrlKey) {
handleControlDown(event); return
}
if (event.isComposing) return
if (state != ConsoleState.SHELLPROMPT) return
if (justHandledInput) {
justHandledInput = false
return
}
val toHandle = if (event.keyCode == 229) {
val x = (mobileInput.selectionStart ?: 1) - 1
val v = mobileInput.value
addLine("X: $x, V: $v")
if (x < 0 || x >= v.length)
return
mobileInput.value = ""
v[x]
} else event.key
when (toHandle) {
"Enter" -> {
handleSubmit()
}
"Backspace" -> input = input.substring(0, input.length - 1)
else ->
if (event.key.length == 1 || event.key.any { it !in 'a'..'z' && it !in 'A'..'Z' })
input += event.key
}
event.preventDefault()
rerender()
scrollDown()
}
}
fun handleControlDown(event: KeyboardEvent){
if (event.key == "v"){
window.navigator.clipboard.readText().then{
input += it
event.preventDefault()
rerender()
scrollDown()
}
}
}
}
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