swift4/ShaarliOS/SettingsVC.swift

   1 //
   2 //  SettingsVC.swift
   3 //  ShaarliOS
   4 //
   5 //  Created by Marcus Rohrmoser on 21.02.20.
   6 //  Copyright © 2020-2022 Marcus Rohrmoser mobile Software http://mro.name/me. All rights reserved.
   7 //
   8 //  This program is free software: you can redistribute it and/or modify
   9 //  it under the terms of the GNU General Public License as published by
  10 //  the Free Software Foundation, either version 3 of the License, or
  11 //  (at your option) any later version.
  12 //
  13 //  This program is distributed in the hope that it will be useful,
  14 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 //  GNU General Public License for more details.
  17 //
  18 //  You should have received a copy of the GNU General Public License
  19 //  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 //
  21
  22 import UIKit
  23 import WebKit
  24
  25 internal func endpoints(_ base : String?, _ uid : String?, _ pwd : String?) -> ArraySlice<URL> {
  26     var urls = ArraySlice<URL>()
  27     guard let base = base?.trimmingCharacters(in:.whitespacesAndNewlines)
  28         else { return urls }
  29     let base_ = base.hasPrefix(HTTP_HTTPS + "://")
  30     ? String(base.dropFirst(HTTP_HTTPS.count+"://".count))
  31     : base.hasPrefix(HTTP_HTTP + "://")
  32     ? String(base.dropFirst(HTTP_HTTP.count+"://".count))
  33     : base.hasPrefix("//")
  34     ? String(base.dropFirst("//".count))
  35     : base
  36
  37     guard var ep = URLComponents(string:"//\(base_)")
  38         else { return urls }
  39     ep.user = uid
  40     ep.password = pwd
  41
  42     ep.scheme = HTTP_HTTPS; urls.append(ep.url!)
  43     ep.scheme = HTTP_HTTP;  urls.append(ep.url!)
  44
  45     let php = "/index.php"
  46     let pa = ep.path.dropLast(ep.path.hasSuffix(php)
  47         ? php.count
  48         : ep.path.hasSuffix("/")
  49         ? 1
  50         : 0)
  51
  52     ep.path = pa + php
  53     ep.scheme = HTTP_HTTPS; urls.append(ep.url!)
  54     ep.scheme = HTTP_HTTP;  urls.append(ep.url!)
  55
  56     return urls
  57 }
  58
  59
  60 class SettingsVC: UITableViewController, UITextFieldDelegate, WKNavigationDelegate {
  61     @IBOutlet private var txtEndpoint       : UITextField!
  62     @IBOutlet private var sldTimeout        : UISlider!
  63     @IBOutlet private var txtTimeout        : UITextField!
  64     @IBOutlet private var swiSecure         : UISwitch!
  65     @IBOutlet private var txtUserName       : UITextField!
  66     @IBOutlet private var txtPassWord       : UITextField!
  67     @IBOutlet private var txtBasicUid       : UITextField!
  68     @IBOutlet private var txtBasicPwd       : UITextField!
  69     @IBOutlet private var lblTitle          : UILabel!
  70     @IBOutlet private var txtTags           : UITextField!
  71     @IBOutlet private var spiLogin          : UIActivityIndicatorView!
  72     @IBOutlet private var cellAbout         : UITableViewCell!
  73
  74     private let wwwAbout                    = WKWebView()
  75     var current                             : BlogM?
  76
  77     // MARK: - Lifecycle
  78
  79     // https://www.objc.io/blog/2018/04/24/bindings-with-kvo-and-keypaths/
  80     override func viewDidLoad() {
  81         super.viewDidLoad()
  82
  83         title = NSLocalizedString("Settings", comment:"SettingsVC")
  84         navigationItem.leftBarButtonItem = UIBarButtonItem.init(barButtonSystemItem: UIBarButtonItem.SystemItem.cancel, target:self, action:#selector(SettingsVC.actionCancel(_:)))
  85         navigationItem.rightBarButtonItem = UIBarButtonItem.init(barButtonSystemItem: UIBarButtonItem.SystemItem.done, target:self, action:#selector(SettingsVC.actionSignIn(_:)))
  86
  87         view.addSubview(spiLogin)
  88         spiLogin.backgroundColor = .clear
  89         txtTimeout.placeholder = NSLocalizedString("sec", comment:"SettingsVC")
  90         sldTimeout.minimumValue = Float(timeoutMinimumValue)
  91         sldTimeout.maximumValue = Float(timeoutMaximumValue)
  92         sldTimeout.value = Float(timeoutDefaultValue)
  93
  94         [txtEndpoint, txtBasicUid, txtBasicPwd, txtTimeout, txtUserName, txtPassWord, txtTags].forEach {
  95             $0.setValue($0.textColor?.withAlphaComponent(0.4), forKeyPath:"placeholderLabel.textColor")
  96         }
  97
  98         guard let url = Bundle(for:type(of:self)).url(forResource:"about", withExtension:"html") else { return }
  99         cellAbout.contentView.addSubview(wwwAbout)
 100         wwwAbout.navigationDelegate = self
 101         wwwAbout.frame = cellAbout!.contentView.bounds.insetBy(dx: 8, dy: 8)
 102         wwwAbout.autoresizingMask = [.flexibleWidth, .flexibleHeight]
 103         wwwAbout.contentScaleFactor = 1.0
 104         wwwAbout.scrollView.isScrollEnabled = false
 105         wwwAbout.scrollView.bounces = false
 106         wwwAbout.isOpaque = false // avoid white flash https://stackoverflow.com/a/15670274
 107         wwwAbout.backgroundColor = .black
 108         wwwAbout.customUserAgent = SHAARLI_COMPANION_APP_URL
 109         wwwAbout.loadFileURL(url, allowingReadAccessTo: url.deletingLastPathComponent())
 110     }
 111
 112     override func viewWillAppear(_ animated: Bool) {
 113         super.viewWillAppear(animated)
 114         spiLogin.stopAnimating()
 115         navigationItem.rightBarButtonItem?.isEnabled = true
 116         txtEndpoint.becomeFirstResponder()
 117         togui(current)
 118     }
 119
 120     override func viewDidAppear(_ animated: Bool) {
 121         super.viewDidAppear(animated)
 122
 123         spiLogin.translatesAutoresizingMaskIntoConstraints = false
 124         let horizontalConstraint = spiLogin.centerXAnchor.constraint(equalTo: lblTitle.centerXAnchor)
 125         let verticalConstraint = spiLogin.centerYAnchor.constraint(equalTo: lblTitle.centerYAnchor)
 126         NSLayoutConstraint.activate([horizontalConstraint, verticalConstraint])
 127
 128         guard let url = UIPasteboard.general.url else {
 129             return
 130         }
 131         let alert = UIAlertController(
 132             title:NSLocalizedString("Use URL form Clipboard", comment: "SettingsVC"),
 133             message:String(format:NSLocalizedString("do you want to use the URL\n'%@'\nas shaarli endpoint?", comment:"SettingsVC"), url.description),
 134             preferredStyle:.alert
 135         )
 136         alert.addAction(UIAlertAction(
 137             title:NSLocalizedString("Cancel", comment:"SettingsVC"),
 138             style:.cancel,
 139             handler:nil))
 140         alert.addAction(UIAlertAction(
 141             title: NSLocalizedString("Yes", comment:"SettingsVC"),
 142             style:.default,
 143             handler:{(_) in self.togui(url)}))
 144         present(alert, animated:true, completion:nil)
 145     }
 146
 147     private func togui(_ ur : URL?) {
 148         txtEndpoint.text        = nil
 149         txtUserName.text        = nil
 150         txtPassWord.text        = nil
 151         swiSecure.isOn          = false
 152         guard let ur = ur else { return }
 153         guard var uc = URLComponents(url:ur, resolvingAgainstBaseURL:true) else { return }
 154         txtUserName.text        = uc.user
 155         txtPassWord.text        = uc.password
 156         swiSecure.isOn          = HTTP_HTTPS == uc.scheme
 157         uc.password             = nil
 158         uc.user                 = nil
 159         uc.scheme               = nil
 160         guard let s = uc.url?.absoluteString else { return }
 161         let su = s.suffix(from:.init(utf16Offset:2, in:s))
 162         txtEndpoint.text        = String(su)
 163     }
 164
 165     private func togui(_ b : BlogM?) {
 166         guard let b = b else {
 167             lblTitle.text = NSLocalizedString("No Shaarli yet.", comment:"SettingsVC")
 168             lblTitle.textColor = .red
 169             return
 170         }
 171
 172         lblTitle.textColor      = ShaarliM.labelColor
 173         lblTitle.text           = b.title;
 174         txtBasicUid.text        = nil
 175         txtBasicPwd.text        = nil
 176         if let cred = b.credential {
 177             if cred.hasPassword {
 178                 txtBasicUid.text  = cred.user
 179                 txtBasicPwd.text  = cred.password
 180             }
 181         }
 182         togui(b.endpoint)
 183         sldTimeout.value        = Float(b.timeout)
 184         sldTimeoutChanged(self)
 185         txtTags.text            = b.tagsDefault
 186     }
 187
 188     // MARK: - Navigation
 189
 190     override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
 191         guard let vc = segue.destination as? MainVC else {return}
 192         vc.current = current
 193     }
 194
 195     // MARK: - Actions
 196
 197     @IBAction func sldTimeoutChanged(_ sender: Any) {
 198         txtTimeout.text = String(format:"%.1f", sldTimeout.value)
 199     }
 200
 201     @IBAction func actionCancel(_ sender: Any) {
 202         print("actionCancel \(type(of: self))")
 203         guard let navigationController = navigationController else { return }
 204         navigationController.popViewController(animated:true)
 205     }
 206
 207     @IBAction func actionSignIn(_ sender: Any) {
 208         print("actionSignIn \(type(of: self))")
 209
 210         lblTitle.textColor = ShaarliM.labelColor
 211         lblTitle.text = NSLocalizedString("", comment:"SettingsVC")// … probing server …
 212         spiLogin.startAnimating()
 213
 214         let cli = ShaarliHtmlClient(AppDelegate.shared.semver)
 215         let tim = TimeInterval(sldTimeout.value)
 216         let cre = URLCredential(user:txtBasicUid.text ?? "",
 217                             password:txtBasicPwd.text ?? "",
 218                             persistence:.forSession)
 219         func recurse(_ urls:ArraySlice<URL>) {
 220             guard let cur = urls.first else {
 221                 self.failure("Oops, something went utterly wrong.")
 222                 return
 223             }
 224             cli.probe(cur, cre, tim) { (ur, ti, pride, tizo, er) in
 225                 guard !ShaarliHtmlClient.isOk(er) else {
 226                     self.success(ur, cre, ti, pride, tizo, tim)
 227                     return
 228                 }
 229                 let res = urls.dropFirst()
 230                 let tryNext = !res.isEmpty // todo: and not banned
 231                 guard tryNext else {
 232                     self.failure(er)
 233                     return
 234                 }
 235                 recurse(res)
 236             }
 237         }
 238
 239         let urls = endpoints(txtEndpoint.text, txtUserName.text, txtPassWord.text)
 240         spiLogin.startAnimating()
 241         navigationItem.rightBarButtonItem?.isEnabled = false
 242         recurse(urls)
 243     }
 244
 245     // MARK: - Controller Logic
 246
 247     private func success(_ ur:URL, _ cre:URLCredential?, _ ti:String, _ pride:Bool, _ tizo:TimeZone?, _ tim:TimeInterval) {
 248         let ad = ShaarliM.shared
 249         DispatchQueue.main.sync {
 250             ad.saveBlog(ad.defaults, BlogM(
 251                 endpoint:ur,
 252                 credential:cre,
 253                 title:ti,
 254                 timeout:tim,
 255                 privateDefault:pride,
 256                 timezone:tizo,
 257                 tagsDefault:txtTags.text ?? ""
 258             ))
 259             navigationController?.popViewController(animated:true)
 260         }
 261     }
 262
 263     private func failure(_ er:String) {
 264         DispatchQueue.main.sync {
 265             spiLogin.stopAnimating()
 266             navigationItem.rightBarButtonItem?.isEnabled = true
 267             self.lblTitle.textColor = .red
 268             self.lblTitle.text = er
 269         }
 270     }
 271
 272     // MARK: - UITextFieldDelegate
 273
 274     func textFieldShouldReturn(_ textField: UITextField) -> Bool {
 275         print("textFieldShouldReturn \(type(of: self))")
 276         switch textField {
 277         case txtEndpoint:   txtUserName.becomeFirstResponder()
 278         case txtUserName:   txtPassWord.becomeFirstResponder()
 279         case txtPassWord:   txtTags.becomeFirstResponder()
 280         case txtTags:       txtTimeout.becomeFirstResponder()
 281         case txtTimeout:    txtBasicUid.becomeFirstResponder()
 282         case txtBasicUid:   txtBasicPwd.becomeFirstResponder()
 283         case txtBasicPwd:   textField.resignFirstResponder()
 284             actionSignIn(textField) // keyboard doesn't show 'Done', but just in case... dispatch async?
 285         default: return false
 286         }
 287         return true
 288     }
 289
 290     func textFieldDidEndEditing(_ textField: UITextField) {
 291         print("textFieldDidEndEditing \(type(of: self))")
 292         switch textField {
 293         case txtTimeout:
 294                         guard let va = Float(txtTimeout.text ?? "") else {
 295                             sldTimeout.value = Float(timeoutDefaultValue)
 296                             sldTimeoutChanged(self)
 297                             return
 298                         }
 299                         sldTimeout.value = Float(timeoutFromDouble(Double(va)))
 300                         sldTimeoutChanged(self)
 301         default: break
 302         }
 303     }
 304
 305     // MARK: - WKWebViewDelegate
 306
 307     func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
 308         guard let url = navigationAction.request.url else {return}
 309         if "file" == url.scheme {
 310             decisionHandler(.allow)
 311             return
 312         }
 313
 314         let app = UIApplication.shared
 315         if #available(iOS 10.0, *) {
 316             app.open(url)
 317         } else {
 318             app.openURL(url)
 319         }
 320         decisionHandler(.cancel)
 321     }
 322
 323     func webView(_ sender:WKWebView, didFinish:WKNavigation!) {
 324         // even this late gives a flash sometimes: view.isOpaque = true
 325         let semv = AppDelegate.shared.semver
 326         let js = "injectVersion('\(semv)');"
 327         wwwAbout.evaluateJavaScript(js) { res,err in print(err as Any) }
 328         let s = wwwAbout.scrollView.contentSize
 329         cellAbout.contentView.bounds = CGRect(origin: .zero, size: s)
 330     }
 331 }