STOPSHIP nea geht schlafen

1 files changed, 55 insertions, 0 deletions

diff --git a/src/main/kotlin/WebOS.kt b/src/main/kotlin/WebOS.kt
index 2ff0b62..d1b0d81 100644
--- a/src/main/kotlin/WebOS.kt
+++ b/src/main/kotlin/WebOS.kt
@@ -58,7 +58,62 @@ class Console(val os: WebOS, val renderElement: Element?) {
 class WebOS {
 	private val _consoles = mutableListOf<Console>()
 	val consoles get() = _consoles.toList()
+	val fileSystem = FileSystem()
 	fun registerConsole(element: Element) {
 		_consoles.add(Console(this, element))
 	}
 }
+
+interface User {
+	val name: String
+	val homeDirectory: Path
+}
+
+data class Path private constructor(val parts: List<String>) {
+	companion object {
+		fun of(text: String) =
+			Path(text.split("/"))
+		fun of(vararg parts: String): Path {
+			if(parts.any { it.contains("/") })
+				throw IllegalArgumentException("Path parts cannot contain forward slashes")
+			return Path(parts.toList())
+		}
+	}
+}
+
+class FileSystem {
+	val mounts = mutableMapOf<Path, Mount>()
+	fun mount(path: Path, mount:Mount) {
+		mounts[path] = mount
+	}
+	fun <T>findMountFor(path: Path, operation: Mount.(relativePath: Path) -> T) :T{
+		val (mountPath, mount) = mounts.filterKeys {
+			// path.startsWith(it)
+			true
+		}.maxByOrNull { it.key.parts.size} ?: throw IllegalStateException("No mount present")
+		return mount.operation(mountPath.relativize(path))
+	}
+
+	fun read(path: Path): ReadResult = findMountFor(path) { read(it) }
+	fun write(path: Path, data: ByteArray): Unit = TODO()
+	fun stat(path: Path): Unit = TODO()
+}
+
+sealed class ReadResult {
+	class Success(val text: String) : ReadResult()
+	object NotFound
+	object NoAccess
+}
+interface Mount {
+	fun read(relativePath: Path): ReadResult = TODO()
+	fun write(path: Path, data: ByteArray): Unit = TODO()
+	fun stat(path: Path): Unit = TODO()
+}
+
+data class Stat(
+	val exists: Boolean,
+	var owner: User,
+	val created: Long,
+	val edited: Long,
+	val size: Long
+)