Fetch sender name when creating media gallery items

Signal/src/ViewControllers/MediaGallery/MediaGallery.swift

@@ -4,6 +4,7 @@
 //
 
 import Foundation
+import SignalMessaging
 import SignalServiceKit
 
 public enum GalleryDirection {
@@ -30,15 +31,27 @@ class MediaGalleryAlbum {
 }
 
 public class MediaGalleryItem: Equatable, Hashable, MediaGallerySectionItem {
+    struct Sender {
+        let name: String
+        let abbreviatedName: String
+    }
+
     let message: TSMessage
+    let sender: Sender?
     let attachmentStream: TSAttachmentStream
+
     let galleryDate: GalleryDate
     let captionForDisplay: String?
     let albumIndex: Int
     let orderingKey: MediaGalleryItemOrderingKey
 
-    init(message: TSMessage, attachmentStream: TSAttachmentStream) {
+    init(
+        message: TSMessage,
+        sender: Sender?,
+        attachmentStream: TSAttachmentStream
+    ) {
         self.message = message
+        self.sender = sender
         self.attachmentStream = attachmentStream
         self.galleryDate = GalleryDate(message: message)
         self.albumIndex = message.attachmentIds.firstIndex(of: attachmentStream.uniqueId) ?? 0
@@ -387,7 +400,44 @@ class MediaGallery: Dependencies {
             return nil
         }
 
-        return MediaGalleryItem(message: message, attachmentStream: attachmentStream)
+        let sender: MediaGalleryItem.Sender? = {
+            let senderAddress: SignalServiceAddress? = {
+                if let incomingMessage = message as? TSIncomingMessage {
+                    return incomingMessage.authorAddress
+                }
+
+                return tsAccountManager.localAddress(with: transaction)
+            }()
+
+            if let senderAddress {
+                let senderName = contactsManager.nameForAddress(
+                    senderAddress,
+                    localUserDisplayMode: .asLocalUser,
+                    short: false,
+                    transaction: transaction
+                )
+
+                let senderAbbreviatedName = contactsManager.nameForAddress(
+                    senderAddress,
+                    localUserDisplayMode: .asLocalUser,
+                    short: true,
+                    transaction: transaction
+                )
+
+                return MediaGalleryItem.Sender(
+                    name: senderName.string,
+                    abbreviatedName: senderAbbreviatedName.string
+                )
+            }
+
+            return nil
+        }()
+
+        return MediaGalleryItem(
+            message: message,
+            sender: sender,
+            attachmentStream: attachmentStream
+        )
     }
 
     internal func album(for item: MediaGalleryItem) -> MediaGalleryAlbum {

Signal/src/ViewControllers/MediaGallery/MediaTileViewController.swift

@@ -1085,37 +1085,18 @@ class GalleryGridCellItem: PhotoGridItem {
     }
 
     lazy var photoMetadata: PhotoMetadata? = {
-        let authorAddress: SignalServiceAddress
-        if let incomingMessage = galleryItem.message as? TSIncomingMessage {
-            authorAddress = incomingMessage.authorAddress
-        } else if let localAddress = TSAccountManager.shared.localAddress {
-            authorAddress = localAddress
-        } else {
-            owsFailDebug("Local address lookup failed unexpectedly")
+        guard let sender = galleryItem.sender else {
+            owsFailDebug("Missing sender!")
             return nil
         }
+
         let filename = galleryItem.attachmentStream.originalFilePath.map {
             ($0 as NSString).lastPathComponent as String
         }
-        let (sender, abbreviatedSender) =
-        SDSDatabaseStorage.shared.read { transaction in
-            let contactsManager = SSKEnvironment.shared.contactsManager
-            return (
-                contactsManager.nameForAddress(
-                    authorAddress,
-                    localUserDisplayMode: .asLocalUser,
-                    short: false,
-                    transaction: transaction),
 
-                contactsManager.nameForAddress(
-                    authorAddress,
-                    localUserDisplayMode: .asLocalUser,
-                    short: true,
-                    transaction: transaction))
-        }
         return PhotoMetadata(
-            sender: sender.string,
-            abbreviatedSender: abbreviatedSender.string,
+            sender: sender.name,
+            abbreviatedSender: sender.abbreviatedName,
             filename: filename,
             byteSize: Int(galleryItem.attachmentStream.byteCount),
             creationDate: galleryItem.attachmentStream.creationTimestamp)