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Convert FeedIconDownloader to async await.

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This commit is contained in:
Brent Simmons 2024-04-16 23:10:55 -07:00
parent d4c923a3d6
commit f0be57b77c
1 changed files with 37 additions and 42 deletions
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79
Images/Sources/Images/FeedIconDownloader.swift
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@ -18,7 +18,7 @@ public extension Notification.Name {
static let FeedIconDidBecomeAvailable = Notification.Name("FeedIconDidBecomeAvailableNotification") // UserInfoKey.feed
}
public protocol FeedIconDownloaderDelegate {
public protocol FeedIconDownloaderDelegate: Sendable {
var appIconImage: IconImage? { get }
@ -96,42 +96,40 @@ public protocol FeedIconDownloaderDelegate {
guard let homePageURL = feed.homePageURL else {
return
}
icon(forHomePageURL: homePageURL, feed: feed) { (image) in
Task { @MainActor in
if let image {
self.postFeedIconDidBecomeAvailableNotification(feed)
self.cache[feed] = IconImage(image)
}
Task { @MainActor in
if let image = await icon(forHomePageURL: homePageURL, feed: feed) {
postFeedIconDidBecomeAvailableNotification(feed)
cache[feed] = IconImage(image)
}
}
}
func checkFeedIconURL() {
if let iconURL = feed.iconURL {
icon(forURL: iconURL, feed: feed) { (image) in
Task { @MainActor in
if let image {
self.postFeedIconDidBecomeAvailableNotification(feed)
self.cache[feed] = IconImage(image)
} else {
checkHomePageURL()
}
}
}
} else {
guard let iconURL = feed.iconURL else {
checkHomePageURL()
return
}
Task { @MainActor in
if let image = await icon(forURL: iconURL, feed: feed) {
postFeedIconDidBecomeAvailableNotification(feed)
cache[feed] = IconImage(image)
} else {
checkHomePageURL()
}
}
}
if let feedProviderURL = feedURLToIconURLCache[feed.url] {
self.icon(forURL: feedProviderURL, feed: feed) { (image) in
Task { @MainActor in
if let image = image {
self.postFeedIconDidBecomeAvailableNotification(feed)
self.cache[feed] = IconImage(image)
}
Task { @MainActor in
if let image = await icon(forURL: feedProviderURL, feed: feed) {
postFeedIconDidBecomeAvailableNotification(feed)
cache[feed] = IconImage(image)
}
}
return nil
}
@ -170,32 +168,29 @@ public protocol FeedIconDownloaderDelegate {
private extension FeedIconDownloader {
func icon(forHomePageURL homePageURL: String, feed: Feed, _ imageResultBlock: @Sendable @escaping (RSImage?) -> Void) {
func icon(forHomePageURL homePageURL: String, feed: Feed) async -> RSImage? {
if homePagesWithNoIconURLCache.contains(homePageURL) || homePagesWithUglyIcons.contains(homePageURL) {
imageResultBlock(nil)
return
return nil
}
if let iconURL = cachedIconURL(for: homePageURL) {
icon(forURL: iconURL, feed: feed, imageResultBlock)
return
return await icon(forURL: iconURL, feed: feed)
}
findIconURLForHomePageURL(homePageURL, feed: feed, downloadMetadata: delegate!.downloadMetadata(_:))
return nil
}
func icon(forURL url: String, feed: Feed, _ imageResultBlock: @Sendable @escaping (RSImage?) -> Void) {
waitingForFeedURLs[url] = feed
guard let imageData = imageDownloader.image(for: url) else {
imageResultBlock(nil)
return
}
func icon(forURL url: String, feed: Feed) async -> RSImage? {
Task {
let image = await RSImage.scaledForIcon(imageData)
imageResultBlock(image)
waitingForFeedURLs[url] = feed
guard let imageData = imageDownloader.image(for: url) else {
return nil
}
return await RSImage.scaledForIcon(imageData)
}
func postFeedIconDidBecomeAvailableNotification(_ feed: Feed) {
@ -241,7 +236,8 @@ private extension FeedIconDownloader {
if let url = metadata.bestWebsiteIconURL() {
cacheIconURL(for: homePageURL, url)
icon(forURL: url, feed: feed) { (image) in
Task { @MainActor in
await icon(forURL: url, feed: feed)
}
return
}
@ -331,5 +327,4 @@ private extension FeedIconDownloader {
assertionFailure(error.localizedDescription)
}
}
}