Michael Schwarz
98 lines
2.8 KiB
Swift
98 lines
2.8 KiB
Swift
//
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// ViewController.swift
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// Demo iOS
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//
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// Created by Hannes Oud on 04.09.17.
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// Copyright © 2017 IdeasOnCanvas GmbH. All rights reserved.
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//
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import AppReceiptValidator
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import UIKit
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/// Displays two textfields. One to paste a receipt into as base64 string, the other displaying the parsed receipt.
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/// A device identifier for validation is not supported, have a look at the mac demo instead.
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class ViewController: UIViewController, UITextViewDelegate {
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@IBOutlet private var inputTextView: UITextView!
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@IBOutlet private var outputTextView: UITextView!
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// MARK: - Lifecycle
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override func viewDidLoad() {
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super.viewDidLoad()
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self.inputTextView.delegate = self
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self.inputTextView.text = ""
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self.outputTextView.text = "Parsed Receipt will be shown here"
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NotificationCenter.default.addObserver(self, selector: #selector(triggerAutoPaste), name: UIApplication.willEnterForegroundNotification, object: nil)
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NotificationCenter.default.addObserver(self, selector: #selector(triggerAutoPaste), name: UIPasteboard.changedNotification, object: nil)
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}
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override func viewDidAppear(_ animated: Bool) {
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super.viewDidAppear(animated)
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if self.autoPaste() {
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return
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} else {
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self.inputTextView.becomeFirstResponder()
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}
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}
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// MARK: - UITextViewDelegate
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func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {
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DispatchQueue.main.async {
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self.update(base64String: self.inputTextView.text)
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}
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return true
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}
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}
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// MARK: - Private
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private extension ViewController {
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// MARK: Actions
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@objc
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func triggerAutoPaste() {
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self.autoPaste()
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}
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@IBAction func clear() {
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self.inputTextView.text = ""
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}
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@IBAction func copyOutput() {
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UIPasteboard.general.string = self.outputTextView.text
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}
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// MARK: Updating
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/// pastes from clipboard if it is base64 decodable
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@discardableResult
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func autoPaste() -> Bool {
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guard let string = UIPasteboard.general.string,
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Data(base64Encoded: string, options: []) != nil else { return false }
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self.inputTextView.text = string
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self.update(base64String: string)
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return true
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}
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func update(base64String: String) {
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guard let data = Data(base64Encoded: base64String, options: []) else {
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self.render(string: "Base64 decoding failed.")
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return
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}
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do {
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let result = try AppReceiptValidator().parseUnofficialReceipt(origin: .data(data))
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render(string: "\(result.receipt)\n\(result.unofficialReceipt)")
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} catch {
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self.render(string: "\(error)")
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}
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}
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func render(string: String) {
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self.outputTextView.text = string
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}
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}
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