Implement link previews for text messages using Apple's LinkPreview framework (#4520)

2026-11-02 21:33:26 +00:00 · 2025-09-19 15:48:09 +03:00
parent 94db3adf3a
commit bfaca7cff9
48 changed files with 347 additions and 31 deletions
@@ -0,0 +1,58 @@
+//
+// Copyright 2023, 2024 New Vector Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+// Please see LICENSE files in the repository root for full details.
+//
+
+import LinkPresentation
+import SwiftUI
+
+struct LinkPreviewView: UIViewRepresentable {
+    let url: URL
+    let metadata: LPLinkMetadata?
+    
+    func makeUIView(context: Context) -> LPLinkView {
+        let preview = LPLinkView(url: url)
+        
+        if let metadata {
+            preview.metadata = metadata
+        }
+        
+        return preview
+    }
+    
+    func updateUIView(_ uiView: LPLinkView, context: Context) {
+        if let metadata {
+            uiView.metadata = metadata
+        }
+    }
+    
+    func sizeThatFits(_ proposal: ProposedViewSize, uiView: LPLinkView, context: Context) -> CGSize? {
+        let width = proposal.width ?? uiView.intrinsicContentSize.width
+        let bestFit = uiView.sizeThatFits(CGSize(width: width, height: .greatestFiniteMagnitude))
+        
+        return CGSize(width: width, height: bestFit.height)
+    }
+}
+
+struct LinkPreviewView_Previews: PreviewProvider {
+    static var previews: some View {
+        if let url = URL(string: "https://www.lunch.club") {
+            LinkPreviewView(url: url, metadata: appleMetadata)
+                .previewLayout(.sizeThatFits)
+        }
+    }
+    
+    private static var appleMetadata: LPLinkMetadata {
+        let metadata = LPLinkMetadata()
+        metadata.title = "Lunch club"
+        
+        if let url = Bundle.main.url(forResource: "preview_avatar_room", withExtension: "jpg") {
+            metadata.url = url
+            metadata.imageProvider = NSItemProvider(contentsOf: url)
+        }
+        
+        return metadata
+    }
+}