passepartout-apple/Passepartout/Sources/Utils.swift

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2018-10-11 07:13:19 +00:00
//
// Utils.swift
// Passepartout
//
// Created by Davide De Rosa on 6/16/18.
// Copyright (c) 2018 Davide De Rosa. All rights reserved.
//
// https://github.com/keeshux
//
// This file is part of Passepartout.
//
// Passepartout is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Passepartout is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Passepartout. If not, see <http://www.gnu.org/licenses/>.
//
import Foundation
#if os(iOS)
import SystemConfiguration.CaptiveNetwork
#else
import CoreWLAN
#endif
import SwiftyBeaver
private let log = SwiftyBeaver.self
class Utils {
fileprivate static let timestampFormatter: DateFormatter = {
let fmt = DateFormatter()
fmt.dateStyle = .medium
fmt.timeStyle = .medium
return fmt
}()
fileprivate static let componentsFormatter: DateComponentsFormatter = {
let fmt = DateComponentsFormatter()
fmt.unitsStyle = .full
return fmt
}()
static func versionString() -> String {
let info = Bundle.main.infoDictionary
guard let version = info?["CFBundleShortVersionString"] else {
fatalError("No bundle version?")
}
guard let build = info?["CFBundleVersion"] else {
fatalError("No bundle build number?")
}
return "\(version) (\(build))"
}
#if targetEnvironment(simulator)
static func hasCellularData() -> Bool {
return true
}
#else
static func hasCellularData() -> Bool {
var addrs: UnsafeMutablePointer<ifaddrs>?
guard getifaddrs(&addrs) == 0 else {
return false
}
var isFound = false
var cursor = addrs?.pointee
while let ifa = cursor {
let name = String(cString: ifa.ifa_name)
if name == "pdp_ip0" {
isFound = true
break
}
cursor = ifa.ifa_next?.pointee
}
freeifaddrs(addrs)
return isFound
}
#endif
#if targetEnvironment(simulator)
static func currentWifiNetworkName() -> String? {
// return nil
return ["FOO", "BAR", "WIFI"].customRandomElement()
}
#else
static func currentWifiNetworkName() -> String? {
#if os(iOS)
guard let interfaceNames = CNCopySupportedInterfaces() as? [CFString] else {
return nil
}
for name in interfaceNames {
guard let iface = CNCopyCurrentNetworkInfo(name) as? [String: Any] else {
continue
}
if let ssid = iface["SSID"] as? String {
return ssid
}
}
return nil
#else
return CWWiFiClient.shared().interface()?.ssid()
#endif
}
#endif
static func regex(_ pattern: String) -> NSRegularExpression {
return try! NSRegularExpression(pattern: pattern, options: [])
}
static func checkConnectivityURL(_ url: URL, timeout: TimeInterval, completionHandler: @escaping (Bool) -> Void) {
let session = URLSession(configuration: .ephemeral)
let request = URLRequest(url: url, cachePolicy: .reloadIgnoringLocalAndRemoteCacheData, timeoutInterval: timeout)
log.info("Check connectivity via \(url)")
session.dataTask(with: request) { (_, response, error) in
if let response = response as? HTTPURLResponse {
log.debug("Response code: \(response.statusCode)")
}
if let error = error {
log.error("Connectivity failed: \(error)")
} else {
log.info("Connectivity succeeded!")
}
DispatchQueue.main.async {
completionHandler(error == nil)
}
}.resume()
}
private init() {
}
}
extension FileManager {
func userURL(for searchPath: SearchPathDirectory, appending: String?) -> URL {
let paths = urls(for: .documentDirectory, in: .userDomainMask)
var directory = paths[0]
if let appending = appending {
directory.appendPathComponent(appending)
}
return directory
}
func modificationDate(of path: String) -> Date? {
guard let attrs = try? attributesOfItem(atPath: path) else {
return nil
}
return attrs[.modificationDate] as? Date
}
}
extension Date {
var timestamp: String {
return Utils.timestampFormatter.string(from: self)
}
}
extension TimeInterval {
var localized: String {
guard let str = Utils.componentsFormatter.string(from: self) else {
fatalError("Could not format a TimeInterval?")
}
return str
}
}
extension Sequence {
func stableSorted(by areInIncreasingOrder: (Element, Element) throws -> Bool) rethrows -> [Element] {
return try enumerated().sorted {
return try areInIncreasingOrder($0.element, $1.element) ||
($0.offset < $1.offset && !areInIncreasingOrder($1.element, $0.element))
}.map { $0.element }
}
}
extension Array {
func customRandomElement() -> Element {
let i = Int(arc4random() % UInt32(count))
return self[i]
}
}
extension StringProtocol where Index == String.Index {
func nsRange(from range: Range<Index>) -> NSRange {
return NSRange(range, in: self)
}
}
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extension String {
func trimmedLines() -> [String] {
return components(separatedBy: .newlines).map {
$0.trimmingCharacters(in: .whitespacesAndNewlines)
}.filter {
!$0.isEmpty
}
}
}
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extension CharacterSet {
static let filename: CharacterSet = {
var chars: CharacterSet = .decimalDigits
let english = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
let symbols = "-_"
chars.formUnion(CharacterSet(charactersIn: english))
chars.formUnion(CharacterSet(charactersIn: english.lowercased()))
chars.formUnion(CharacterSet(charactersIn: symbols))
return chars
}()
}
extension URL {
private static let illegalCharacterFallback = "_"
var normalizedFilename: String {
let filename = deletingPathExtension().lastPathComponent
return filename.components(separatedBy: CharacterSet.filename.inverted).joined(separator: URL.illegalCharacterFallback)
}
}