feat(ComposeMessage): Preview attachment on click

Mail/Views/Attachment/AttachmentPreview.swift

@@ -37,8 +37,11 @@ struct AttachmentPreview: View {
     var body: some View {
         NavigationView {
             Group {
-                if let url = attachment.localUrl, FileManager.default.fileExists(atPath: url.path) {
-                    PreviewController(url: url)
+                if FileManager.default.fileExists(atPath: attachment.localUrl.path) {
+                    PreviewController(url: attachment.localUrl)
+                } else if let temporaryLocalUrl = attachment.temporaryLocalUrl,
+                          FileManager.default.fileExists(atPath: temporaryLocalUrl) {
+                    PreviewController(url: URL(fileURLWithPath: temporaryLocalUrl))
                 } else {
                     ProgressView()
                 }
@@ -51,9 +54,8 @@ struct AttachmentPreview: View {
 
                 ToolbarItemGroup(placement: .bottomBar) {
                     Button {
-                        guard let attachmentURL = attachment.localUrl else { return }
                         matomo.track(eventWithCategory: .message, name: "download")
-                        downloadedAttachmentURL = IdentifiableURL(url: attachmentURL)
+                        downloadedAttachmentURL = IdentifiableURL(url: attachment.localUrl)
                     } label: {
                         Label {
                             Text(MailResourcesStrings.Localizable.buttonDownload)

Mail/Views/New Message/Attachments/AttachmentUploadCell.swift

@@ -23,28 +23,32 @@ import MailResources
 import SwiftUI
 
 struct AttachmentUploadCell: View {
-    private let detachedAttachment: Attachment
+    @EnvironmentObject private var mailboxManager: MailboxManager
+
+    private let attachment: Attachment
     private let attachmentRemoved: ((Attachment) -> Void)?
 
     @ObservedObject var uploadTask: AttachmentUploadTask
 
+    @State private var previewedAttachment: Attachment?
+
     init(uploadTask: AttachmentUploadTask, attachment: Attachment, attachmentRemoved: ((Attachment) -> Void)?) {
         self.uploadTask = uploadTask
-        detachedAttachment = attachment.detached()
+        self.attachment = attachment
         self.attachmentRemoved = attachmentRemoved
     }
 
     var body: some View {
         AttachmentView(
-            attachment: detachedAttachment,
-            subtitle: uploadTask.error != nil ? (uploadTask.error!.errorDescription ?? "") : detachedAttachment.size
+            attachment: attachment.detached(),
+            subtitle: uploadTask.error != nil ? (uploadTask.error!.errorDescription ?? "") : attachment.size
                 .formatted(.defaultByteCount)
         ) {
             Button {
                 if let attachmentRemoved {
                     @InjectService var matomo: MatomoUtils
                     matomo.track(eventWithCategory: .attachmentActions, name: "delete")
-                    attachmentRemoved(detachedAttachment)
+                    attachmentRemoved(attachment)
                 }
             } label: {
                 IKIcon(MailResourcesAsset.close, size: .small)
@@ -56,6 +60,22 @@ struct AttachmentUploadCell: View {
             IndeterminateProgressView(indeterminate: uploadTask.progress == 0, progress: uploadTask.progress)
                 .opacity(uploadTask.progress == 1 ? 0 : 1)
         }
+        .onTapGesture {
+            showAttachmentPreview()
+        }
+        .sheet(item: $previewedAttachment) { previewedAttachment in
+            AttachmentPreview(attachment: previewedAttachment)
+        }
+    }
+
+    private func showAttachmentPreview() {
+        guard let attachment = attachment.thaw()?.freezeIfNeeded() else { return }
+        previewedAttachment = attachment
+        if !FileManager.default.fileExists(atPath: attachment.localUrl.path) {
+            Task {
+                await mailboxManager.saveAttachmentLocally(attachment: attachment)
+            }
+        }
     }
 }
 

Mail/Views/Thread/Message/Attachment/AttachmentsView.swift

@@ -48,7 +48,7 @@ struct AttachmentsView: View {
                         Button {
                             matomo.track(eventWithCategory: .attachmentActions, name: "open")
                             previewedAttachment = attachment
-                            if !FileManager.default.fileExists(atPath: attachment.localUrl?.path ?? "") {
+                            if !FileManager.default.fileExists(atPath: attachment.localUrl.path) {
                                 Task {
                                     await mailboxManager.saveAttachmentLocally(attachment: attachment)
                                 }

MailCore/Cache/AttachmentsManagerWorker/AttachmentsManagerWorker.swift

@@ -253,6 +253,7 @@ public final class AttachmentsManagerWorker {
                 self.updateAttachmentUploadTaskProgress(attachment, progress: progress)
             }
         }
+        remoteAttachment.temporaryLocalUrl = url.path
         await updateAttachment(oldAttachment: localAttachment, newAttachment: remoteAttachment)
         return remoteAttachment
     }
@@ -308,7 +309,11 @@ extension AttachmentsManagerWorker: AttachmentsManagerWorkable {
         guard let liveDraft else {
             return []
         }
-        return liveDraft.attachments.filter { $0.contentId == nil && !$0.isInvalidated }.toArray()
+        return liveDraft.attachments.filter { attachment in
+            guard !attachment.isInvalidated else { return false }
+            guard let contentId = attachment.contentId else { return true }
+            return contentId.isEmpty
+        }.toArray()
     }
 
     public var allAttachmentsUploaded: Bool {

MailCore/Cache/MailboxManager/MailboxManager+Message.swift

@@ -314,13 +314,12 @@ public extension MailboxManager {
     func saveAttachmentLocally(attachment: Attachment) async {
         do {
             let data = try await attachmentData(attachment)
-            if let url = attachment.localUrl {
-                let parentFolder = url.deletingLastPathComponent()
-                if !FileManager.default.fileExists(atPath: parentFolder.path) {
-                    try FileManager.default.createDirectory(at: parentFolder, withIntermediateDirectories: true)
-                }
-                try data.write(to: url)
+            let url = attachment.localUrl
+            let parentFolder = url.deletingLastPathComponent()
+            if !FileManager.default.fileExists(atPath: parentFolder.path) {
+                try FileManager.default.createDirectory(at: parentFolder, withIntermediateDirectories: true)
             }
+            try data.write(to: url)
         } catch {
             // Handle error
             print("Failed to save attachment: \(error)")

MailCore/Cache/MailboxManager/MailboxManager.swift

@@ -73,7 +73,7 @@ public final class MailboxManager: ObservableObject, MailboxManageable, RealmAcc
         let realmName = "\(mailbox.userId)-\(mailbox.mailboxId).realm"
         realmConfiguration = Realm.Configuration(
             fileURL: MailboxManager.constants.rootDocumentsURL.appendingPathComponent(realmName),
-            schemaVersion: 23,
+            schemaVersion: 24,
             migrationBlock: { migration, oldSchemaVersion in
                 // No migration needed from 0 to 16
                 if oldSchemaVersion < 17 {

MailCore/Models/Attachment.swift

@@ -37,14 +37,14 @@ public class Attachment: /* Hashable, */ EmbeddedObject, Codable, Identifiable {
     @Persisted public var driveUrl: String?
     @Persisted(originProperty: "attachments") var parentLink: LinkingObjects<Message>
     @Persisted public var saved = false
+    @Persisted public var temporaryLocalUrl: String?
 
     public var parent: Message? {
         return parentLink.first
     }
 
-    public var localUrl: URL? {
-        guard let message = parent else { return nil }
-        return FileManager.default.temporaryDirectory.appendingPathComponent("\(message.uid)_\(partId)/\(name)")
+    public var localUrl: URL {
+        return FileManager.default.temporaryDirectory.appendingPathComponent("\(uuid)_\(partId)/\(name)")
     }
 
     public var uti: UTType? {
@@ -159,6 +159,7 @@ public class Attachment: /* Hashable, */ EmbeddedObject, Codable, Identifiable {
         contentId = remoteAttachment.contentId
         resource = remoteAttachment.resource
         driveUrl = remoteAttachment.driveUrl
+        temporaryLocalUrl = remoteAttachment.temporaryLocalUrl
     }
 }