prevent illegal scene names in windows

fixes #213

src/view/explorer/NewSceneField.svelte

@@ -1,6 +1,7 @@
 <script lang="ts">
   import { getContext } from "svelte";
   import { selectedDraft } from "src/model/stores";
+  import { invalidFilenameCharacters, isValidFilename } from "../utils";
 
   let newSceneName: string = "";
   let newSceneInput: HTMLElement;
@@ -16,8 +17,8 @@
       error = null;
     } else if (sceneNames.contains(newSceneName)) {
       error = "A scene with this name already exists in this draft.";
-    } else if (newSceneName.match(/[\/\\:]/g)) {
-      error = "A scene name cannot contain the characters: \\ / :";
+    } else if (!isValidFilename(newSceneName)) {
+      error = `A scene name cannot contain the characters: ${invalidFilenameCharacters()}`;
     } else {
       error = null;
     }

src/view/utils.ts

@@ -1,7 +1,26 @@
+import { Platform } from "obsidian";
+
 export function selectElementContents(el: HTMLElement) {
   const range = document.createRange();
   range.selectNodeContents(el);
   const sel = window.getSelection();
   sel.removeAllRanges();
   sel.addRange(range);
 }
+
+export function invalidFilenameCharacters(): string {
+  if (Platform.isWin) {
+    return '* " \\ / : < > | ?';
+  }
+  return "\\ / :";
+}
+
+export function isValidFilename(name: string): boolean {
+  if (Platform.isWin && name.match(/[\*"\\\/:<>|\?]*/g)) {
+    return false;
+  }
+  if (name.match(/[\/\\:]/g)) {
+    return false;
+  }
+  return true;
+}