NetNewsWire/Shared/Extensions/URL-Extensions.swift

54 lines
1.7 KiB
Swift

//
// URL-Extensions.swift
// NetNewsWire
//
// Created by Stuart Breckenridge on 03/05/2020.
// Copyright © 2020 Ranchero Software. All rights reserved.
//
import Foundation
extension URL {
/// Extracts email address from a `URL` with a `mailto` scheme, otherwise `nil`.
var emailAddress: String? {
scheme == "mailto" ? URLComponents(url: self, resolvingAgainstBaseURL: false)?.path : nil
}
/// Percent encoded `mailto` URL for use with `canOpenUrl`. If the URL doesn't contain the `mailto` scheme, this is `nil`.
var percentEncodedEmailAddress: URL? {
guard scheme == "mailto" else {
return nil
}
guard let urlString = absoluteString.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed) else {
return nil
}
return URL(string: urlString)
}
/// Reverse chronological list of release notes.
static let releaseNotes = URL(string: "https://github.com/Ranchero-Software/NetNewsWire/releases/")!
func valueFor(_ parameter: String) -> String? {
guard let components = URLComponents(url: self, resolvingAgainstBaseURL: false),
let queryItems = components.queryItems,
let value = queryItems.first(where: { $0.name == parameter })?.value else {
return nil
}
return value
}
static func repairingIfRequired(_ link: String?) -> URL? {
// If required, we replace any space characters to handle malformed links that are otherwise percent
// encoded but contain spaces. For performance reasons, only try this if initial URL init fails.
guard let link = link, !link.isEmpty else { return nil }
if let url = URL(string: link) {
return url
} else {
return URL(string: link.replacingOccurrences(of: " ", with: "%20"))
}
}
}