feat: add desktop repo (#1071)

packages/desktop/app/javascripts/Main/Utils/Utils.ts

@@ -0,0 +1,44 @@
+import { CommandLineArgs } from '../../Shared/CommandLineArgs'
+
+export function isDev(): boolean {
+  return process.env.NODE_ENV === 'development'
+}
+
+export function isTesting(): boolean {
+  return isDev() && process.argv.includes(CommandLineArgs.Testing)
+}
+
+export function isBoolean(arg: unknown): arg is boolean {
+  return typeof arg === 'boolean'
+}
+
+export function ensureIsBoolean(arg: unknown, fallbackValue: boolean): boolean {
+  if (isBoolean(arg)) {
+    return arg
+  }
+  return fallbackValue
+}
+
+export function stringOrNull(arg: unknown): string | null {
+  if (typeof arg === 'string') {
+    return arg
+  }
+  return null
+}
+
+/** Ensures a path's drive letter is lowercase. */
+export function lowercaseDriveLetter(filePath: string): string {
+  return filePath.replace(/^\/[A-Z]:\//, (letter) => letter.toLowerCase())
+}
+
+export function timeout(ms: number): Promise<void> {
+  return new Promise((resolve) => setTimeout(resolve, ms))
+}
+
+export function removeFromArray<T>(array: T[], toRemove: T): void {
+  array.splice(array.indexOf(toRemove), 1)
+}
+
+export function last<T>(array: T[]): T | undefined {
+  return array[array.length - 1]
+}