62 lines
1.5 KiB
Swift
62 lines
1.5 KiB
Swift
//
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// FeedIconImageLoader.swift
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// NetNewsWire
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//
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// Created by Maurice Parker on 6/29/20.
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// Copyright © 2020 Ranchero Software. All rights reserved.
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//
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import SwiftUI
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import Account
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final class FeedIconImageLoader: ObservableObject {
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private var feed: Feed?
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@Published var image: IconImage?
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init() {
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NotificationCenter.default.addObserver(self, selector: #selector(faviconDidBecomeAvailable(_:)), name: .FaviconDidBecomeAvailable, object: nil)
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NotificationCenter.default.addObserver(self, selector: #selector(webFeedIconDidBecomeAvailable(_:)), name: .WebFeedIconDidBecomeAvailable, object: nil)
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}
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func loadImage(for feed: Feed) {
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guard image == nil else { return }
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self.feed = feed
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fetchImage()
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}
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}
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private extension FeedIconImageLoader {
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@objc func faviconDidBecomeAvailable(_ note: Notification) {
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fetchImage()
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}
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@objc func webFeedIconDidBecomeAvailable(_ note: Notification) {
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guard let feed = feed as? WebFeed, let noteFeed = note.userInfo?[UserInfoKey.webFeed] as? WebFeed, feed == noteFeed else {
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return
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}
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fetchImage()
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}
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func fetchImage() {
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if let webFeed = feed as? WebFeed {
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if let feedIconImage = appDelegate.webFeedIconDownloader.icon(for: webFeed) {
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image = feedIconImage
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return
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}
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if let faviconImage = appDelegate.faviconDownloader.faviconAsIcon(for: webFeed) {
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image = faviconImage
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return
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}
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}
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if let smallIconProvider = feed as? SmallIconProvider {
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image = smallIconProvider.smallIcon
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}
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}
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}
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