67 lines
1.8 KiB
Swift
67 lines
1.8 KiB
Swift
|
//
|
||
|
|
// SeekingFavicon.swift
|
||
|
|
// Evergreen
|
||
|
|
//
|
||
|
|
// Created by Brent Simmons on 11/23/17.
|
||
|
|
// Copyright © 2017 Ranchero Software. All rights reserved.
|
||
|
|
//
|
||
|
|
|
||
|
|
import Foundation
|
||
|
|
|
||
|
|
extension Notification.Name {
|
||
|
|
|
||
|
|
static let SeekingFaviconDidFindFaviconURL = Notification.Name("SeekingFaviconDidFindFaviconURLNotification")
|
||
|
|
static let SeekingFaviconDidNotFindFaviconURL = Notification.Name("SeekingFaviconDidNotFindFaviconURLNotification")
|
||
|
|
}
|
||
|
|
|
||
|
|
final class SeekingFavicon {
|
||
|
|
|
||
|
|
// At first, when looking for a favicon, we only know the homePageURL.
|
||
|
|
// The faviconURL may be specified by metadata in the home page,
|
||
|
|
// or it might be at /favicon.ico,
|
||
|
|
// or it might not exist (or be unfindable, which is the same thing).
|
||
|
|
|
||
|
|
let homePageURL: String
|
||
|
|
let defaultFaviconURL: String // /favicon.ico
|
||
|
|
var didAttemptToLookAtHomePageMetadata = false
|
||
|
|
var foundFaviconURL: String?
|
||
|
|
|
||
|
|
var shouldUseDefaultFaviconURL: Bool {
|
||
|
|
|
||
|
|
return didAttemptToLookAtHomePageMetadata && foundFaviconURL == nil
|
||
|
|
}
|
||
|
|
|
||
|
|
private static let localeForLowercasing = Locale(identifier: "en_US")
|
||
|
|
|
||
|
|
init?(homePageURL: String) {
|
||
|
|
|
||
|
|
guard let url = URL(string: homePageURL), let scheme = url.scheme, let host = url.host else {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
self.homePageURL = homePageURL
|
||
|
|
self.defaultFaviconURL = "\(scheme)://\(host)/favicon.ico".lowercased(with: SeekingFavicon.localeForLowercasing)
|
||
|
|
|
||
|
|
findFaviconURL()
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private extension SeekingFavicon {
|
||
|
|
|
||
|
|
func findFaviconURL() {
|
||
|
|
|
||
|
|
FaviconURLFinder.findFaviconURL(homePageURL) { (faviconURL) in
|
||
|
|
|
||
|
|
self.didAttemptToLookAtHomePageMetadata = true
|
||
|
|
self.foundFaviconURL = faviconURL
|
||
|
|
|
||
|
|
if let _ = faviconURL {
|
||
|
|
NotificationCenter.default.post(name: .SeekingFaviconDidFindFaviconURL, object: self)
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
NotificationCenter.default.post(name: .SeekingFaviconDidNotFindFaviconURL, object: self)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|