Open iOS system apps.

SystemAppType.swift

//
//  SystemAppType.swift
//  REIWA
//
//  Created by Neil Jain on 19/03/18.
//  Copyright © 2018 NeilsUltimateLab. All rights reserved.
//

import Foundation

enum SystemAppType {
    /// **Example** :
    ///
    ///     tel:1-408-555-5555
    ///
    /// **Reference**: https://developer.apple.com/library/content/featuredarticles/iPhoneURLScheme_Reference/PhoneLinks/PhoneLinks.html#//apple_ref/doc/uid/TP40007899-CH6-SW1
    case telephone(String)
    
    /// **Example**:
    ///
    ///     facetime:user@example.com
    ///     facetime://user@example.com
    /// **Reference**: https://developer.apple.com/library/content/featuredarticles/iPhoneURLScheme_Reference/FacetimeLinks/FacetimeLinks.html#//apple_ref/doc/uid/TP40007899-CH2-SW1
    case facetime(String)
    
    /// **Example**:
    ///
    ///     facetime-audio:user@example.com
    ///     facetime-audio://user@example.com
    /// **Reference**: https://developer.apple.com/library/content/featuredarticles/iPhoneURLScheme_Reference/FacetimeLinks/FacetimeLinks.html#//apple_ref/doc/uid/TP40007899-CH2-SW1
    case facetimeAudio(String)
    
    /// **Example**:
    ///
    ///     sms:1-408-555-1212
    /// **Reference**: https://developer.apple.com/library/content/featuredarticles/iPhoneURLScheme_Reference/SMSLinks/SMSLinks.html#//apple_ref/doc/uid/TP40007899-CH7-SW1
    case sms(String)
    
    /// **Example** :
    ///
    ///     mailto:frank@wwdcdemo.example.com
    ///
    /// **Reference** : https://developer.apple.com/library/content/featuredarticles/iPhoneURLScheme_Reference/MailLinks/MailLinks.html#//apple_ref/doc/uid/TP40007899-CH4-SW1
    case mail(String)
    
    case url(String?)
}

extension SystemAppType {
    var url: URL? {
        switch self {
        case .telephone(let telNumber):
            return URL(string: "tel://\(telNumber)")
        case .facetime(let fId):
            return URL(string: "facetime://\(fId)")
        case .facetimeAudio(let fId):
            return URL(string: "facetime-audio://\(fId)")
        case .sms(let number):
            return URL(string: "sms://\(number)")
        case .mail(let email):
            return URL(string: "mailto:\(email)")
        case .url(let str):
            guard let urlString = str else { return nil }
            return URL(string: urlString)
        }
    }
}

extension UIApplication {
    func open(_ systemApp: SystemAppType) {
        guard let url = systemApp.url else {
            return
        }
        if canOpenURL(url) {
            openURL(url)
        } else {
            print("Application can not open app: \(systemApp)")
        }
    }
}