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472//
// ViewController.swift
// T-Squared for Georgia Tech
//
// Created by Cal on 8/26/15.
// Copyright © 2015 Cal Stephens. All rights reserved.
//
import UIKit
import Foundation
var TSAuthenticatedReader: TSReader!
let TSLogoutNotification = "edu.gatech.cal.logout"
let TSDismissWebViewNotification = "edu.gatech.cal.dismissWeb"
class LoginViewController: UIViewController, UIGestureRecognizerDelegate {
@IBOutlet weak var formCenter: NSLayoutConstraint!
@IBOutlet weak var backgroundBottom: NSLayoutConstraint!
@IBOutlet weak var formBlurView: UIVisualEffectView!
@IBOutlet weak var formView: UIView!
@IBOutlet weak var usernameField: UITextField!
@IBOutlet weak var passwordField: UITextField!
@IBOutlet weak var loggingInText: UILabel!
var originalLoggingInText: NSAttributedString!
@IBOutlet weak var activityIndicator: UIActivityIndicatorView!
@IBOutlet weak var saveCredentialsSwitch: UISwitch!
@IBOutlet weak var containerLeading: NSLayoutConstraint!
@IBOutlet weak var webViewTop: NSLayoutConstraint!
@IBOutlet var tapRecognizer: UITapGestureRecognizer!
var classesViewController: ClassesViewController!
var browserViewController: TSWebView!
@IBOutlet var activityCircle: UIView!
//MARK: - Preparing the View Controller
override func viewDidLoad() {
//transition from old password scheme
let data = NSUserDefaults.standardUserDefaults()
if let savedUsername = data.stringForKey("edu.gatech.cal.username"),
let savedPassword = data.stringForKey("edu.gatech.cal.password") {
saveCredentials(username: savedUsername, password: savedPassword)
}
//nil-out the current values and close up that hole
data.setValue(nil, forKey: "edu.gatech.cal.username")
data.setValue(nil, forKey: "edu.gatech.cal.password")
}
override func viewWillAppear(animated: Bool) {
if animated { return }
if TSAuthenticatedReader != nil { return } //we're already authenticated
//double check we aren't already authenticated
let rootPage = "http://t-square.gatech.edu/portal/pda/"
let pageContents = HttpClient.contentsOfPage(rootPage, postNotificationOnError: false)?.toHTML
var validConnection = true
if let contents = pageContents {
if contents.containsString("Log Out") {
//we're still on a valid connection, but the authenticated reader doesn't exist
//recreate the reader
if let (username, password) = savedCredentials() {
TSAuthenticatedReader = TSReader(username: username, password: password, initialPage: nil)
return
}
else {
//the reader doesn't exist, but we don't have stored credentials
//clear cookies and then prompt for login again
HttpClient.clearCookies()
}
}
} else {
//there were no page contents, meaning the network is unavailable
validConnection = false
delay(0.5) { self.syncronizedNetworkErrorRecieved() }
}
self.formCenter.constant = self.view.frame.height / 2.0
self.webViewTop.constant = UIScreen.mainScreen().bounds.height
self.containerLeading.constant = UIScreen.mainScreen().bounds.width
self.view.layoutIfNeeded()
originalLoggingInText = loggingInText.attributedText!
let currentUsername = TSLaunchedUsername
usernameField.text = currentUsername
if let (savedUsername, savedPassword) = savedCredentials() where currentUsername == nil || currentUsername == "" || currentUsername == savedUsername {
usernameField.text = savedUsername
passwordField.text = savedPassword
if validConnection {
animateFormSubviewsWithDuration(0.0, hidden: true)
animateActivityIndicator(on: true)
doLogin(newLogin: false)
}
}
UIView.animateWithDuration(0.7, delay: 0.0, usingSpringWithDamping: 0.7, initialSpringVelocity: 0.0, options: [], animations: {
self.formCenter.constant = 10.0
self.view.layoutIfNeeded()
}, completion: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "showLogoutAlert", name: TSLogoutNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "dismissWebView", name: TSDismissWebViewNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardHeightChanged:", name: UIKeyboardWillChangeFrameNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "centerForm", name: UIKeyboardWillHideNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "networkErrorRecieved", name: TSNetworkErrorNotification, object: nil)
activityCircle.hidden = false
activityCircle.layer.cornerRadius = 25.0
activityCircle.layer.masksToBounds = true
activityCircle.transform = CGAffineTransformMakeScale(0.0, 0.0)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if let classes = segue.destinationViewController as? ClassesViewController {
classes.loginController = self
classesViewController = classes
}
if let browser = segue.destinationViewController as? TSWebView {
browser.loginController = self
self.browserViewController = browser
}
}
//MARK: - Animating and processing form input
func keyboardHeightChanged(notification: NSNotification) {
//ignore if the classes controller is visible
if self.containerLeading.constant == 0.0 { return }
if let userInfo = notification.userInfo,
let keyboardFrame = (userInfo[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue {
let keyboardHeight = keyboardFrame().height
let newConstant = -10 - (keyboardHeight / (is4S() ? 2.5 : 3.0))
if newConstant == formCenter.constant { return }
UIView.animateWithDuration(0.5, delay: 0.0, usingSpringWithDamping: 1.0, initialSpringVelocity: 0.0, options: [], animations: {
self.formCenter.constant = newConstant
self.backgroundBottom.constant = keyboardHeight - 100.0
self.view.layoutIfNeeded()
}, completion: nil)
}
}
func centerForm() {
UIView.animateWithDuration(0.5, delay: 0.0, usingSpringWithDamping: 1.0, initialSpringVelocity: 0.0, options: [], animations: {
self.formCenter.constant = -10.0
self.backgroundBottom.constant = 0.0
self.view.layoutIfNeeded()
}, completion: nil)
}
@IBAction func switchToPasswordInput(sender: AnyObject) {
passwordField.becomeFirstResponder()
}
@IBAction func loginPressed(sender: AnyObject) {
doLogin(newLogin: true)
}
func doLogin(newLogin newLogin: Bool) {
if usernameField.text! == "" || passwordField.text! == "" {
shakeView(formView)
self.animateFormSubviewsWithDuration(0.5, hidden: false)
self.animateActivityIndicator(on: false)
self.setSavedCredentials(correct: false)
return
}
//center the form
self.passwordField.resignFirstResponder()
self.usernameField.resignFirstResponder()
centerForm()
//easter-egg
if self.usernameField.text! == "gburdell1927" {
self.passwordField.text = ""
let alert = UIAlertController(title: "Nice Try, you trickster", message: "George Burdell, is that you???", preferredStyle: .Alert)
alert.addAction(UIAlertAction(title: "You found me out", style: .Default, handler: nil))
self.presentViewController(alert, animated: true, completion: nil)
return
}
//animate the activity indicator
animateFormSubviewsWithDuration(0.5, hidden: true)
delay(0.2) { self.animateActivityIndicator(on: true) }
//attempt to authenticate
dispatch_async(TSNetworkQueue, {
TSReader.authenticatedReader(user: self.usernameField.text!, password: self.passwordField.text!, isNewLogin: newLogin, completion: { reader in
if let reader = reader {
TSAuthenticatedReader = reader
self.animateFormSubviewsWithDuration(0.5, hidden: false)
self.animateActivityIndicator(on: false)
self.setSavedCredentials(correct: true)
self.presentClassesView(reader)
}
else {
self.passwordField.text = ""
shakeView(self.formView)
self.animateFormSubviewsWithDuration(0.5, hidden: false)
self.animateActivityIndicator(on: false)
self.setSavedCredentials(correct: false)
}
})
})
}
func networkErrorRecieved() {
sync {
self.syncronizedNetworkErrorRecieved()
}
}
func syncronizedNetworkErrorRecieved() {
self.animateFormSubviewsWithDuration(0.5, hidden: false)
self.animateActivityIndicator(on: false)
let existingUsername = self.usernameField.text
let existingPassword = self.passwordField.text
//prevent the username and password from being cleared out
delay(0.5) {
self.usernameField.text = existingUsername
self.passwordField.text = existingPassword
}
let alert = UIAlertController(title: "Couldn't connect to T-Square", message: "Are you connected to the internet?", preferredStyle: .Alert)
alert.addAction(UIAlertAction(title: "Cancel", style: .Destructive, handler: nil))
alert.addAction(UIAlertAction(title: "Settings", style: .Default, handler: { _ in openSettings() }))
self.presentViewController(alert, animated: true, completion: nil)
self.classesViewController.DISABLE_PUSHES = true
}
func setSavedCredentials(correct correct: Bool) {
if !correct || !saveCredentialsSwitch.on {
saveCredentials(username: nil, password: nil)
}
else {
saveCredentials(username: usernameField.text, password: passwordField.text)
}
}
func animateFormSubviewsWithDuration(duration: Double, hidden: Bool) {
for subview in formView.subviews {
if !(subview is UIVisualEffectView) && subview.tag != -1 {
UIView.animateWithDuration(duration) {
subview.alpha = hidden ? 0.0 : (subview.tag == 1 ? 0.3 : 1.0)
}
}
}
UIView.animateWithDuration(duration) {
self.loggingInText.alpha = hidden ? 1.0 : 0.0
}
let loggingInString = originalLoggingInText.mutableCopy() as! NSMutableAttributedString
loggingInString.replaceCharactersInRange(NSMakeRange(14, 8), withString: usernameField.text!)
self.loggingInText.attributedText = loggingInString
}
func animateActivityIndicator(on on: Bool) {
var originalIndicatorPosition: CGPoint {
return CGPointMake(CGRectGetMidX(formView.frame) - activityIndicator.frame.width / 2.0, (CGRectGetMidY(formView.frame) - activityIndicator.frame.height / 2.0) + 50.0)
}
if on {
let originalPosition = originalIndicatorPosition
let animationStart = CGPointMake(originalPosition.x, originalPosition.y + 50)
activityIndicator.frame.origin = animationStart
UIView.animateWithDuration(0.7, delay: 0.0, usingSpringWithDamping: 0.7, initialSpringVelocity: 0.0, options: [], animations: {
self.activityIndicator.frame.origin = originalPosition
self.activityIndicator.alpha = 1.0
}, completion: nil)
}
else {
let originalPosition = originalIndicatorPosition
let animationEnd = CGPointMake(originalPosition.x, originalPosition.y + 50)
UIView.animateWithDuration(0.7, delay: 0.0, usingSpringWithDamping: 0.7, initialSpringVelocity: 0.0, options: [], animations: {
self.activityIndicator.frame.origin = animationEnd
self.activityIndicator.alpha = 0.0
}, completion: nil)
}
}
@IBAction func defocusTextViews(sender: UITapGestureRecognizer) {
let touch = sender.locationInView(self.view)
let blurFrame = self.view.convertRect(formBlurView.frame, fromView: formBlurView.superview!)
if !CGRectContainsPoint(blurFrame, touch) {
usernameField.resignFirstResponder()
passwordField.resignFirstResponder()
centerForm()
}
}
func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWithGestureRecognizer otherGestureRecognizer: UIGestureRecognizer) -> Bool {
return true
}
//MARK: - Switching Views
func presentClassesView(reader: TSReader) {
tapRecognizer.enabled = false
var classes: [Class] = []
var loadAttempt = 0
while classes.count == 0 && loadAttempt < 15 && !reader.actuallyHasNoClasses {
loadAttempt++
classes = reader.getActiveClasses()
if classes.count == 0 {
reader.checkIfHasNoClasses()
}
if loadAttempt > 4 {
HttpClient.clearCookies()
}
}
if loadAttempt >= 15 {
//present an alert and then exit the app if the classes aren't loading
//this means a failed authentication looked like it passed
//AKA I have no idea what happened
let message = "This happens every now and then. Please restart T-Squared and try again. If this keeps happening, please send an email to cal@calstephens.tech"
let alert = UIAlertController(title: "There was a problem logging you in.", message: message, preferredStyle: .Alert)
alert.addAction(UIAlertAction(title: "Restart", style: .Default, handler: { _ in
//crash
let null: Int! = nil
null.threeCharacterString()
}))
self.presentViewController(alert, animated: true, completion: nil)
self.setSavedCredentials(correct: false)
return
}
classesViewController.classes = classes
classesViewController.reloadTable()
//open to the shortcut item if there is one queued
if let delegate = UIApplication.sharedApplication().delegate as? AppDelegate {
delegate.openShortcutItemIfPresent()
}
animatePresentClassesView()
classesViewController.loadAnnouncements(reloadClasses: false)
}
func animatePresentClassesView() {
UIView.animateWithDuration(0.5, delay: 0.0, usingSpringWithDamping: 1.0, initialSpringVelocity: 0.0, options: [], animations: {
self.formView.alpha = 0.0
self.formView.transform = CGAffineTransformMakeScale(0.6, 0.6)
self.containerLeading.constant = 0.0
self.view.layoutIfNeeded()
}, completion: nil)
}
func unpresentClassesView() {
unpresentClassesView(0.5)
}
func unpresentClassesView(duration: Double) {
UIView.animateWithDuration(duration, delay: 0.0, usingSpringWithDamping: 1.0, initialSpringVelocity: 0.0, options: [], animations: {
self.formView.alpha = 1.0
self.formView.transform = CGAffineTransformMakeScale(1.0, 1.0)
self.containerLeading.constant = self.view.frame.width
self.view.layoutIfNeeded()
}, completion: nil)
}
//logout from gatech login service and trash saved passwords
func showLogoutAlert() {
let alert = UIAlertController(title: nil, message: "Are you sure you want to log out?", preferredStyle: iPad() ? .Alert : .ActionSheet)
alert.addAction(UIAlertAction(title: "Log out", style: .Destructive, handler: { _ in self.logout() }))
alert.addAction(UIAlertAction(title: "Cancel", style: .Cancel, handler: nil))
self.presentViewController(alert, animated: true, completion: nil)
}
func logout() {
self.classesViewController.announcements = []
self.classesViewController.classes = nil
NSURLCache.sharedURLCache().removeAllCachedResponses()
HttpClient.clearCookies()
HttpClient.sessionID = nil
HttpClient.authFormPost = nil
HttpClient.authLTPost = nil
TSAuthenticatedReader = nil
self.usernameField.text = ""
self.passwordField.text = ""
self.setSavedCredentials(correct: false)
NSUserDefaults.standardUserDefaults().setValue(nil, forKey: TSClassOpenCountKey)
Class.updateShortcutItems()
unpresentClassesView()
}
override func viewWillTransitionToSize(size: CGSize, withTransitionCoordinator coordinator: UIViewControllerTransitionCoordinator) {
super.viewWillTransitionToSize(size, withTransitionCoordinator: coordinator)
if self.containerLeading.constant != 0 {
delay(0.01) {
self.containerLeading.constant = self.view.frame.width
self.view.layoutIfNeeded()
}
}
if self.webViewTop.constant != 0 {
delay(0.01) {
self.webViewTop.constant = self.view.frame.height
self.view.layoutIfNeeded()
}
}
}
//MARK: - Methods that shouldn't be in this View Controller
var webViewVisible = false
override func preferredStatusBarStyle() -> UIStatusBarStyle {
return webViewVisible ? .LightContent : .Default
}
func presentWebViewWithURL(URL: NSURL, title: String) {
webViewVisible = true
browserViewController.openLink("\(URL)")
presentWebViewWithTitle(title)
}
func presentWebViewWithText(text: String, title: String) {
webViewVisible = true
browserViewController.renderText(text)
presentWebViewWithTitle(title)
}
private func presentWebViewWithTitle(title: String) {
browserViewController.previousURL = nil
browserViewController.titleLabel.text = title
UIView.animateWithDuration(0.5, delay: 0.0, usingSpringWithDamping: 0.9, initialSpringVelocity: 0.0, options: [], animations: {
self.webViewTop.constant = 0.0
self.setNeedsStatusBarAppearanceUpdate()
self.view.layoutIfNeeded()
}, completion: nil)
}
func dismissWebView() {
dismissWebView(0.5)
}
func dismissWebView(duration: Double) {
webViewVisible = false
postNotification(TSPerformingNetworkActivityNotification, object: false)
UIView.animateWithDuration(duration, delay: 0.0, usingSpringWithDamping: 0.9, initialSpringVelocity: 0.0, options: [], animations: {
self.webViewTop.constant = self.view.frame.height
self.view.layoutIfNeeded()
self.setNeedsStatusBarAppearanceUpdate()
}, completion: nil)
}
}