From 03af68924ce36ed4e198025602f54f627ca1d375 Mon Sep 17 00:00:00 2001
From: CMK <cirno.mainasuk@gmail.com>
Date: Mon, 18 Apr 2022 17:14:49 +0800
Subject: [PATCH] feat: add favicon for NewsView

---
 .../xcshareddata/swiftpm/Package.resolved     | 18 ++++++++++++
 MastodonSDK/Package.swift                     |  4 ++-
 .../View/Content/NewsView+Configuration.swift | 19 ++++++++++++
 .../MastodonUI/View/Content/NewsView.swift    | 29 +++++++++++++++++--
 4 files changed, 67 insertions(+), 3 deletions(-)

diff --git a/Mastodon.xcworkspace/xcshareddata/swiftpm/Package.resolved b/Mastodon.xcworkspace/xcshareddata/swiftpm/Package.resolved
index 8dd69150..53f6a3a4 100644
--- a/Mastodon.xcworkspace/xcshareddata/swiftpm/Package.resolved
+++ b/Mastodon.xcworkspace/xcshareddata/swiftpm/Package.resolved
@@ -55,6 +55,15 @@
           "version": "1.2.0"
         }
       },
+      {
+        "package": "FaviconFinder",
+        "repositoryURL": "https://github.com/will-lumley/FaviconFinder.git",
+        "state": {
+          "branch": null,
+          "revision": "1f74844f77f79b95c0bb0130b3a87d4f340e6d3a",
+          "version": "3.3.0"
+        }
+      },
       {
         "package": "FLAnimatedImage",
         "repositoryURL": "https://github.com/Flipboard/FLAnimatedImage.git",
@@ -172,6 +181,15 @@
           "version": "1.0.0"
         }
       },
+      {
+        "package": "SwiftSoup",
+        "repositoryURL": "https://github.com/scinfu/SwiftSoup.git",
+        "state": {
+          "branch": null,
+          "revision": "41e7c263fb8c277e980ebcb9b0b5f6031d3d4886",
+          "version": "2.4.2"
+        }
+      },
       {
         "package": "Introspect",
         "repositoryURL": "https://github.com/siteline/SwiftUI-Introspect.git",
diff --git a/MastodonSDK/Package.swift b/MastodonSDK/Package.swift
index ed4a13d5..8b007c2a 100644
--- a/MastodonSDK/Package.swift
+++ b/MastodonSDK/Package.swift
@@ -37,7 +37,8 @@ let package = Package(
         .package(url: "https://github.com/Alamofire/AlamofireImage.git", from: "4.1.0"),
         .package(name: "NukeFLAnimatedImagePlugin", url: "https://github.com/kean/Nuke-FLAnimatedImage-Plugin.git", from: "8.0.0"),
         .package(name: "UITextView+Placeholder", url: "https://github.com/MainasuK/UITextView-Placeholder.git", from: "1.4.1"),
-        .package(name: "Introspect", url: "https://github.com/siteline/SwiftUI-Introspect.git", from: "0.1.3")
+        .package(name: "Introspect", url: "https://github.com/siteline/SwiftUI-Introspect.git", from: "0.1.3"),
+        .package(name: "FaviconFinder", url: "https://github.com/will-lumley/FaviconFinder.git", from: "3.2.2"),
     ],
     targets: [
         // Targets are the basic building blocks of a package. A target can define a module or a test suite.
@@ -95,6 +96,7 @@ let package = Package(
                 .product(name: "AlamofireImage", package: "AlamofireImage"),
                 .product(name: "MetaTextKit", package: "MetaTextKit"),
                 .product(name: "FLAnimatedImage", package: "FLAnimatedImage"),
+                .product(name: "FaviconFinder", package: "FaviconFinder"),
             ]
         ),
         .testTarget(
diff --git a/MastodonSDK/Sources/MastodonUI/View/Content/NewsView+Configuration.swift b/MastodonSDK/Sources/MastodonUI/View/Content/NewsView+Configuration.swift
index e045eafe..397982aa 100644
--- a/MastodonSDK/Sources/MastodonUI/View/Content/NewsView+Configuration.swift
+++ b/MastodonSDK/Sources/MastodonUI/View/Content/NewsView+Configuration.swift
@@ -9,9 +9,28 @@ import UIKit
 import MastodonSDK
 import MastodonLocalization
 import AlamofireImage
+import FaviconFinder
 
 extension NewsView {
     public func configure(link: Mastodon.Entity.Link) {
+        let faviconPlaceholder = UIImage(systemName: "network")
+        providerFaviconImageView.image = faviconPlaceholder
+        if let url = URL(string: link.url) {
+            let token = providerFaviconImageView.tag
+            FaviconFinder(url: url).downloadFavicon { [weak self] result in
+                guard let self = self else { return }
+                switch result {
+                case .success(let favicon):
+                    DispatchQueue.main.async { [weak self] in
+                        guard let self = self else { return }
+                        guard self.providerFaviconImageView.tag == token else { return }
+                        self.providerFaviconImageView.image = favicon.image
+                    }
+                case .failure:
+                    break
+                }
+            }
+        }
         providerNameLabel.text = link.providerName
         headlineLabel.text = link.title
         footnoteLabel.text = L10n.Plural.peopleTalking(link.talkingPeopleCount ?? 0) 
diff --git a/MastodonSDK/Sources/MastodonUI/View/Content/NewsView.swift b/MastodonSDK/Sources/MastodonUI/View/Content/NewsView.swift
index ee9506a9..6d4cf3fd 100644
--- a/MastodonSDK/Sources/MastodonUI/View/Content/NewsView.swift
+++ b/MastodonSDK/Sources/MastodonUI/View/Content/NewsView.swift
@@ -12,6 +12,15 @@ public final class NewsView: UIView {
     
     let container = UIStackView()
     
+    let providerFaviconImageView: UIImageView = {
+        let imageView = UIImageView()
+        imageView.contentMode = .scaleAspectFit
+        imageView.layer.masksToBounds = true
+        imageView.layer.cornerRadius = 2
+        imageView.layer.cornerCurve = .continuous
+        return imageView
+    }()
+    
     let providerNameLabel: UILabel = {
         let label = UILabel()
         label.font = UIFontMetrics(forTextStyle: .footnote).scaledFont(for: .systemFont(ofSize: 13, weight: .semibold))
@@ -37,6 +46,7 @@ public final class NewsView: UIView {
     let imageView = MediaView()
     
     public func prepareForReuse() {
+        providerFaviconImageView.tag = (0..<Int.max).randomElement() ?? -1
         imageView.prepareForReuse()
     }
     
@@ -72,13 +82,28 @@ extension NewsView {
         textContainer.spacing = 4
         container.addArrangedSubview(textContainer)
         
-        // providerContainer: H - [ providerFavIconImageView | providerNameLabel | (spacer) ]
+        // providerContainer: H - [ providerFaviconImageView | providerNameLabel | (spacer) ]
         let providerContainer = UIStackView()
         providerContainer.axis = .horizontal
+        providerContainer.spacing = 4
         textContainer.addArrangedSubview(providerContainer)
 
+        providerFaviconImageView.translatesAutoresizingMaskIntoConstraints = false
+        providerContainer.addArrangedSubview(providerFaviconImageView)
         providerContainer.addArrangedSubview(providerNameLabel)
-        
+        NSLayoutConstraint.activate([
+            providerFaviconImageView.heightAnchor.constraint(equalTo: providerNameLabel.heightAnchor, multiplier: 1.0).priority(.required - 10),
+            providerFaviconImageView.widthAnchor.constraint(equalTo: providerNameLabel.heightAnchor, multiplier: 1.0).priority(.required - 10),
+        ])
+        // low priority for intrinsic size hugging
+        providerFaviconImageView.setContentHuggingPriority(.defaultLow - 10, for: .vertical)
+        providerFaviconImageView.setContentHuggingPriority(.defaultLow - 10, for: .horizontal)
+        // high priority but lower then layout constraint for size compression
+        providerFaviconImageView.setContentCompressionResistancePriority(.required - 11, for: .vertical)
+        providerFaviconImageView.setContentCompressionResistancePriority(.required - 11, for: .horizontal)
+        providerNameLabel.setContentCompressionResistancePriority(.required - 1, for: .vertical)
+        providerNameLabel.setContentHuggingPriority(.required - 1, for: .vertical)
+
         // headlineLabel
         textContainer.addArrangedSubview(headlineLabel)
         let spacer = UIView()