chore: make webfs usable

src/shell/Shell.ts

@@ -1,3 +1,4 @@
+import type { Item } from '../fs/Item'
 import type { Program } from '../program/Program'
 import type { Terminal } from '../terminal/Terminal'
 import type { EventBroadcaster } from '../utils/EventBroadcaster'
@@ -17,4 +18,5 @@ export abstract class Shell {
     abstract ExecuteProgram(name: string, args: string[]): void
     abstract Init(): Promise<void>
     abstract HandleKeyInput(key: string, isCharacter: boolean): void
+    abstract SetWorkingDirectory(directory: Item): Promise<void>
 }

src/shell/Wush.ts

@@ -21,6 +21,8 @@ import { ResetIndexedDb } from '../program/ResetIndexedDb'
 import { Cat } from '../program/Cat'
 import { Echo } from '../program/Echo'
 import { Mkdir } from '../program/Mkdir'
+import { Pwd } from '../program/Pwd'
+import { Cd } from '../program/Cd'
 
 export class Wush extends Shell {
     public readonly Version = "0.1.0"
@@ -47,7 +49,7 @@ export class Wush extends Shell {
     readonly stdout: SimpleStream<string>
 
     private programs: { [name: string]: Program } = {}
-    private workingDirectory: Item = null as unknown as Item // workdir is initialized in the Init so this should be safe
+    private workingDirectory: Item = null as unknown as Item // workdir is initialized in Init so this should be safe
 
     constructor(broadcaster: EventBroadcaster, terminal: Terminal) {
         super(broadcaster, terminal)
@@ -65,9 +67,6 @@ export class Wush extends Shell {
         // load workdir
         this.workingDirectory = await Item.Root()
 
-        if (!this.workingDirectory.Exists())
-            this.workingDirectory.Create()
-
         // load core programs
         this.programs['clear'] = new Clear()
         this.programs['eval'] = new Eval()
@@ -83,6 +82,8 @@ export class Wush extends Shell {
         this.programs['cat'] = new Cat()
         this.programs['echo'] = new Echo()
         this.programs['mkdir'] = new Mkdir()
+        this.programs['pwd'] = new Pwd()
+        this.programs['cd'] = new Cd(this)
 
         this.stdout.on(data => this.WriteEscapedString(data))
         this.Prompt()
@@ -121,7 +122,19 @@ export class Wush extends Shell {
     }
 
     Prompt() {
-        this.terminal.Write(`hi [${this.execExitCode}] -> `)
+        this.terminal.Write(`boykisser in ${this.workingDirectory.GetPath()} -> `)
+    }
+
+    /**
+     * Changes the working directory
+     * @param directory the directory to enter into
+     * @throws an error if the directory cannot be opened
+     */
+    async SetWorkingDirectory(directory: Item) {
+        if (!(await directory.Exists()) || !directory.IsDirectory())
+            throw new Error(`Directory  ${directory.GetPath()} doesn't exist`)
+
+        this.workingDirectory = directory
     }
 
     WriteStdin(data: string) {