Always give new files and dirs a new index if their names are taken (#3460)

* Add actual support for makeUnique parameter

* Add uniqueness logic to dirs, make text-to-cad receive unique filename

* No longer need makeUnique flag, it's always on

* fmt

* Don't show toast when name hasn't changed during a rename

* fmt

* Get "interact with many" text-to-cad test passing again

* Get "engine fails export" back to reliably green

* Maybe more stable click target for text-to-cad test

* Make "export is already going" test moderately more reliable

* Mark "export is already going" as fixme

* Undo that fixme thing I take it back

src/lib/tauriFS.ts

@@ -1,7 +1,8 @@
-import { appConfigDir } from '@tauri-apps/api/path'
+import { appConfigDir, join } from '@tauri-apps/api/path'
 import { isTauri } from './isTauri'
 import type { FileEntry } from 'lib/types'
 import {
+  FILE_EXT,
   INDEX_IDENTIFIER,
   MAX_PADDING,
   ONBOARDING_PROJECT_NAME,
@@ -15,6 +16,7 @@ import {
   readAppSettingsFile,
 } from './tauri'
 import { engineCommandManager } from './singletons'
+import { exists } from '@tauri-apps/plugin-fs'
 
 export const isHidden = (fileOrDir: FileEntry) =>
   !!fileOrDir.name?.startsWith('.')
@@ -162,3 +164,56 @@ export async function createAndOpenNewProject({
   )
   return newProject
 }
+
+/**
+ * Get the next available file name by appending a hyphen and number to the end of the name
+ * @todo move this to the equivalent of tauriFS.ts for Electron migration
+ */
+export async function getNextFileName({
+  entryName,
+  baseDir,
+}: {
+  entryName: string
+  baseDir: string
+}) {
+  // Remove any existing index from the name before adding a new one
+  let createdName = entryName.replace(FILE_EXT, '') + FILE_EXT
+  let createdPath = await join(baseDir, createdName)
+  let i = 1
+  while (await exists(createdPath)) {
+    const matchOnIndexAndExtension = new RegExp(`(-\\d+)?(${FILE_EXT})?$`)
+    createdName =
+      entryName.replace(matchOnIndexAndExtension, '') + `-${i}` + FILE_EXT
+    createdPath = await join(baseDir, createdName)
+    i++
+  }
+  return {
+    name: createdName,
+    path: createdPath,
+  }
+}
+
+/**
+ * Get the next available directory name by appending a hyphen and number to the end of the name
+ * @todo move this to the equivalent of tauriFS.ts for Electron migration
+ */
+export async function getNextDirName({
+  entryName,
+  baseDir,
+}: {
+  entryName: string
+  baseDir: string
+}) {
+  let createdName = entryName
+  let createdPath = await join(baseDir, createdName)
+  let i = 1
+  while (await exists(createdPath)) {
+    createdName = entryName.replace(/-\d+$/, '') + `-${i}`
+    createdPath = await join(baseDir, createdName)
+    i++
+  }
+  return {
+    name: createdName,
+    path: createdPath,
+  }
+}