Adds logic for making folders

lib/pages/opensim/Inventory.dart

@@ -1,3 +1,11 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:libac_flutter/utils/uuid/UUID.dart';
+import 'package:zontreck/Constants.dart';
+import 'package:zontreck/Packets.dart';
+import 'package:zontreck/Settings.dart';
+
 enum InventoryFolder {
   Texture(id: 0, name: "Textures"),
   Sound(id: 1, name: "Sounds"),
@@ -32,3 +40,105 @@ enum InventoryFolder {
   final String name;
   const InventoryFolder({required this.id, required this.name});
 }
+
+class CreateInventoryPopup extends StatefulWidget {
+  @override
+  State<StatefulWidget> createState() => CreateInventoryState();
+}
+
+class CreateInventoryState extends State<CreateInventoryPopup> {
+  double getProgress() {
+    double percent = (value * 100 / total);
+    return percent / 100;
+  }
+
+  int value = 0;
+  int total = 100;
+
+  @override
+  void didChangeDependencies() {
+    startProcessing();
+  }
+
+  Future<void> startProcessing() async {
+    total = InventoryFolder.values.length;
+    await Future.delayed(Duration(seconds: 5));
+
+    UUID rootFolder = UUID.generate(4);
+
+    Settings settings = Settings();
+    Future<void> createFolder(Timer timer) async {
+      if (getProgress() >= 1) {
+        timer.cancel();
+        Navigator.pop(context);
+
+        ScaffoldMessenger.of(context).showSnackBar(SnackBar(
+            content: Text(
+                "Inventory successfully created. Your account is now active")));
+        return;
+      }
+
+      UUID parent = rootFolder;
+      UUID id = UUID.generate(4);
+      UUID owner = settings.currentUser!.ID;
+      int type = InventoryFolder.values[value].id;
+      String name = InventoryFolder.values[value].name;
+
+      if (type == InventoryFolder.ROOT.id) {
+        parent = UUID.ZERO;
+        id = rootFolder;
+      }
+
+      C2SCreateFolderPacket makeFolder = C2SCreateFolderPacket(
+          ParentFolder: parent,
+          ID: id,
+          Name: name,
+          Type: type,
+          Owner: owner,
+          client: Constants.CLIENTPSK);
+
+      var reply = await settings.sendPacketToEndpoint(
+          APIEndpoint.MakeFolder, makeFolder) as S2CSimpleReplyPacket;
+      if (!reply.done) {
+        timer.cancel();
+        Navigator.pop(context);
+        showDialog(
+            context: context,
+            builder: (V) {
+              return AlertDialog(
+                title: Text("FATAL ERROR"),
+                content: Text(
+                    "For an unknown reason, we failed to create the inventory folders. Some may have been created, but there was an error while processing: ${makeFolder.encodeSafe()}"),
+              );
+            });
+      }
+
+      value++;
+
+      setState(() {});
+    }
+
+    Timer.periodic(Duration(milliseconds: 500), createFolder);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return AlertDialog(
+        icon: Icon(Icons.folder_copy),
+        title: Text("Please Wait... Activating Account"),
+        content: SizedBox(
+          height: 75,
+          child: Column(
+            children: [
+              Text("Creating necessary Inventory Folders"),
+              Divider(),
+              LinearProgressIndicator(
+                value: getProgress(),
+                color: Constants.PORTFOLIO_CARD_COLOR,
+                minHeight: 10,
+              )
+            ],
+          ),
+        ));
+  }
+}