iTunes-validator.ts

import * as path from "path";
import { IFileSystem, IHostInfo } from "../declarations";
import { injector } from "../yok";

export class ITunesValidator implements Mobile.IiTunesValidator {
	private static NOT_INSTALLED_iTUNES_ERROR_MESSAGE =
		"iTunes is not installed. Install it on your system and run this command again.";
	private static BITNESS_MISMATCH_ERROR_MESSAGE =
		"The bitness of Node.js and iTunes must match. Verify that both Node.js and iTunes are 32-bit or 64-bit and try again.";
	private static UNSUPPORTED_OS_ERROR_MESSAGE =
		"iTunes is not available for this operating system. You will not be able to work with connected iOS devices.";

	constructor(private $fs: IFileSystem, private $hostInfo: IHostInfo) {}

	public getError(): string {
		if (this.$hostInfo.isWindows) {
			let commonProgramFiles = "";
			const isNode64 = process.arch === "x64";

			if (isNode64) {
				//x64-windows
				commonProgramFiles = process.env.CommonProgramFiles;
				if (
					this.isiTunesInstalledOnWindows(
						process.env["CommonProgramFiles(x86)"]
					) &&
					!this.isiTunesInstalledOnWindows(commonProgramFiles)
				) {
					return ITunesValidator.BITNESS_MISMATCH_ERROR_MESSAGE;
				}
			} else {
				if (this.$hostInfo.isWindows32) {
					// x86-node, x86-windows
					commonProgramFiles = process.env.CommonProgramFiles;
				} else {
					// x86-node, x64-windows
					// check for x64-iTunes
					commonProgramFiles = process.env["CommonProgramFiles(x86)"];

					if (
						this.isiTunesInstalledOnWindows(process.env.CommonProgramFiles) &&
						!this.isiTunesInstalledOnWindows(commonProgramFiles)
					) {
						return ITunesValidator.BITNESS_MISMATCH_ERROR_MESSAGE;
					}
				}
			}

			if (!this.isiTunesInstalledOnWindows(commonProgramFiles)) {
				return ITunesValidator.NOT_INSTALLED_iTUNES_ERROR_MESSAGE;
			}

			return null;
		} else if (this.$hostInfo.isDarwin) {
			// Commented out check to get macOS Big Sur working
			// by the looks of it - iTunes is no longer used by the CLI
			// so we likely want to remove any legacy code related to it
			// this is currently in progress
			// TODO: remove this comment when no longer relevant.
			return null;
			// const coreFoundationDir =
			// 	"/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation";
			// const mobileDeviceDir =
			// 	"/System/Library/PrivateFrameworks/MobileDevice.framework/MobileDevice";
			//
			// if (!this.isiTunesInstalledCore(coreFoundationDir, mobileDeviceDir)) {
			// 	return ITunesValidator.NOT_INSTALLED_iTUNES_ERROR_MESSAGE;
			// }
			//
			// return null;
		}

		return ITunesValidator.UNSUPPORTED_OS_ERROR_MESSAGE;
	}

	private isiTunesInstalledOnWindows(commonProgramFiles: string): boolean {
		const coreFoundationDir = path.join(
			commonProgramFiles,
			"Apple",
			"Apple Application Support"
		);
		const mobileDeviceDir = path.join(
			commonProgramFiles,
			"Apple",
			"Mobile Device Support"
		);

		return this.isiTunesInstalledCore(coreFoundationDir, mobileDeviceDir);
	}

	private isiTunesInstalledCore(
		coreFoundationDir: string,
		mobileDeviceDir: string
	): boolean {
		return (
			this.$fs.exists(coreFoundationDir) && this.$fs.exists(mobileDeviceDir)
		);
	}
}
injector.register("iTunesValidator", ITunesValidator);