AppPlugin.swift

import Foundation
import Capacitor

@objc(AppPlugin)
public class AppPlugin: CAPPlugin {
    private var observers: [NSObjectProtocol] = []

    override public func load() {
        NotificationCenter.default.addObserver(self, selector: #selector(self.handleUrlOpened(notification:)), name: Notification.Name.capacitorOpenURL, object: nil)
        NotificationCenter.default.addObserver(self, selector: #selector(self.handleUniversalLink(notification:)), name: Notification.Name.capacitorOpenUniversalLink, object: nil)
        observers.append(NotificationCenter.default.addObserver(forName: UIApplication.didBecomeActiveNotification, object: nil, queue: OperationQueue.main) { [weak self] (_) in
            self?.notifyListeners("appStateChange", data: [
                "isActive": true
            ])
        })
        observers.append(NotificationCenter.default.addObserver(forName: UIApplication.willResignActiveNotification, object: nil, queue: OperationQueue.main) { [weak self] (_) in
            self?.notifyListeners("appStateChange", data: [
                "isActive": false
            ])
        })

        observers.append(NotificationCenter.default.addObserver(forName: UIApplication.didEnterBackgroundNotification, object: nil, queue: OperationQueue.main) { [weak self] (_) in
            self?.notifyListeners("pause", data: nil)
        })

        observers.append(NotificationCenter.default.addObserver(forName: UIApplication.willEnterForegroundNotification, object: nil, queue: OperationQueue.main) { [weak self] (_) in
            self?.notifyListeners("resume", data: nil)
        })

    }

    deinit {
        NotificationCenter.default.removeObserver(self)
        for observer in observers {
            NotificationCenter.default.removeObserver(observer)
        }
    }

    @objc func handleUrlOpened(notification: NSNotification) {
        guard let object = notification.object as? [String: Any?] else {
            return
        }

        notifyListeners("appUrlOpen", data: makeUrlOpenObject(object), retainUntilConsumed: true)
    }

    @objc func handleUniversalLink(notification: NSNotification) {
        guard let object = notification.object as? [String: Any?] else {
            return
        }

        notifyListeners("appUrlOpen", data: makeUrlOpenObject(object), retainUntilConsumed: true)
    }

    func makeUrlOpenObject(_ object: [String: Any?]) -> JSObject {
        guard let url = object["url"] as? NSURL else {
            return [:]
        }

        let options = object["options"] as? [String: Any?] ?? [:]
        return [
            "url": url.absoluteString ?? "",
            "iosSourceApplication": options[UIApplication.OpenURLOptionsKey.sourceApplication.rawValue] as? String ?? "",
            "iosOpenInPlace": options[UIApplication.OpenURLOptionsKey.openInPlace.rawValue] as? String ?? ""
        ]
    }

    @objc func exitApp(_ call: CAPPluginCall) {
        call.unimplemented()
    }

    @objc func getInfo(_ call: CAPPluginCall) {
        if let info = Bundle.main.infoDictionary {
            call.resolve([
                "name": info["CFBundleDisplayName"] as? String ?? "",
                "id": info["CFBundleIdentifier"] as? String ?? "",
                "build": info["CFBundleVersion"] as? String ?? "",
                "version": info["CFBundleShortVersionString"] as? String ?? ""
            ])
        } else {
            call.reject("Unable to get App Info")
        }

    }

    @objc func getLaunchUrl(_ call: CAPPluginCall) {
        if let lastUrl = ApplicationDelegateProxy.shared.lastURL {
            let urlValue = lastUrl.absoluteString
            call.resolve([
                "url": urlValue
            ])
        }
        call.resolve()
    }

    @objc func getState(_ call: CAPPluginCall) {
        DispatchQueue.main.async {
            call.resolve([
                "isActive": UIApplication.shared.applicationState == UIApplication.State.active
            ])
        }
    }

    @objc func minimizeApp(_ call: CAPPluginCall) {
        call.unimplemented()
    }

    @objc func getAppLanguageCode(_ call: CAPPluginCall) {

        // According to https://developer.apple.com/news/?id=u2cfuj88, the current
        // app language is returned by 'Bundle.main.preferredLocalizations.first'.
        // Fallback to device language if app language is not defined.

        let appLanguageWithFallbackToDeviceLanguage =
            Bundle.main.preferredLocalizations.first ?? Locale.preferredLanguages[0]
        let code = String(appLanguageWithFallbackToDeviceLanguage.prefix(2))

        call.resolve([
            "value": code
        ])
    }

    @objc func getAppLanguageTag(_ call: CAPPluginCall) {
        let tag = Bundle.main.preferredLocalizations.first ?? Locale.preferredLanguages[0]

        call.resolve([
            "value": tag
        ])
    }
}