Add support for editing posts

Closes #321

Packages/ComposeUI/Sources/ComposeUI/API/PostService.swift

@@ -15,16 +15,14 @@ class PostService: ObservableObject {
     private let mastodonController: ComposeMastodonContext
     private let config: ComposeUIConfig
     private let draft: Draft
-    let totalSteps: Int
     
     @Published var currentStep = 1
+    @Published private(set) var totalSteps = 2
     
     init(mastodonController: ComposeMastodonContext, config: ComposeUIConfig, draft: Draft) {
         self.mastodonController = mastodonController
         self.config = config
         self.draft = draft
-        // 2 steps (request data, then upload) for each attachment
-        self.totalSteps = 2 + (draft.attachments.count * 2)
     }
     
     func post() async throws {
@@ -40,32 +38,73 @@ class PostService: ObservableObject {
         let contentWarning = draft.contentWarningEnabled ? draft.contentWarning : nil
         let sensitive = contentWarning != nil
         
-        let request = Client.createStatus(
+        let request: Request<Status>
-            text: textForPosting(),
+        
-            contentType: config.contentType,
+        if let editedStatusID = draft.editedStatusID {
-            inReplyTo: draft.inReplyToID,
+            if mastodonController.instanceFeatures.needsEditAttachmentsInSeparateRequest {
-            media: uploadedAttachments,
+                await updateEditedAttachments()
-            sensitive: sensitive,
+            }
-            spoilerText: contentWarning,
+            
-            visibility: draft.visibility,
+            request = Client.editStatus(
-            language: mastodonController.instanceFeatures.createStatusWithLanguage ? draft.language : nil,
+                id: editedStatusID,
-            pollOptions: draft.poll?.pollOptions.map(\.text),
+                text: textForPosting(),
-            pollExpiresIn: draft.poll == nil ? nil : Int(draft.poll!.duration),
+                contentType: config.contentType,
-            pollMultiple: draft.poll?.multiple,
+                spoilerText: contentWarning,
-            localOnly: mastodonController.instanceFeatures.localOnlyPosts ? draft.localOnly : nil
+                sensitive: sensitive,
-        )
+                language: mastodonController.instanceFeatures.createStatusWithLanguage ? draft.language : nil,
+                mediaIDs: uploadedAttachments,
+                mediaAttributes: draft.draftAttachments.compactMap {
+                    if let id = $0.editedAttachmentID {
+                        return EditStatusMediaAttributes(id: id, description: $0.attachmentDescription, focus: nil)
+                    } else {
+                        return nil
+                    }
+                },
+                poll: draft.poll.map {
+                    EditPollParameters(options: $0.pollOptions.map(\.text), expiresIn: Int($0.duration), multiple: $0.multiple)
+                }
+            )
+        } else {
+            request = Client.createStatus(
+                text: textForPosting(),
+                contentType: config.contentType,
+                inReplyTo: draft.inReplyToID,
+                mediaIDs: uploadedAttachments,
+                sensitive: sensitive,
+                spoilerText: contentWarning,
+                visibility: draft.visibility,
+                language: mastodonController.instanceFeatures.createStatusWithLanguage ? draft.language : nil,
+                pollOptions: draft.poll?.pollOptions.map(\.text),
+                pollExpiresIn: draft.poll == nil ? nil : Int(draft.poll!.duration),
+                pollMultiple: draft.poll?.multiple,
+                localOnly: mastodonController.instanceFeatures.localOnlyPosts ? draft.localOnly : nil
+            )
+        }
+        
         do {
-            let (_, _) = try await mastodonController.run(request)
+            let (status, _) = try await mastodonController.run(request)
             currentStep += 1
+            mastodonController.storeCreatedStatus(status)
         } catch let error as Client.Error {
             throw Error.posting(error)
         }
     }
     
-    private func uploadAttachments() async throws -> [Attachment] {
+    private func uploadAttachments() async throws -> [String] {
-        var attachments: [Attachment] = []
+        // 2 steps (request data, then upload) for each attachment
+        self.totalSteps += 2 * draft.attachments.count
+        
+        var attachments: [String] = []
         attachments.reserveCapacity(draft.attachments.count)
         for (index, attachment) in draft.draftAttachments.enumerated() {
+            // if this attachment already exists and is being edited, we don't do anything
+            // edits to the description are handled as part of the edit status request
+            if let editedAttachmentID = attachment.editedAttachmentID {
+                attachments.append(editedAttachmentID)
+                currentStep += 2
+                continue
+            }
+            
             let data: Data
             let utType: UTType
             do {
@@ -76,7 +115,7 @@ class PostService: ObservableObject {
             }
             do {
                 let uploaded = try await uploadAttachment(data: data, utType: utType, description: attachment.attachmentDescription)
-                attachments.append(uploaded)
+                attachments.append(uploaded.id)
                 currentStep += 1
             } catch let error as Client.Error {
                 throw Error.attachmentUpload(index: index, cause: error)
@@ -117,6 +156,17 @@ class PostService: ObservableObject {
         return text
     }
     
+    // only needed for akkoma, not used on regular mastodon
+    private func updateEditedAttachments() async {
+        for attachment in draft.draftAttachments {
+            guard let id = attachment.editedAttachmentID else {
+                continue
+            }
+            let req = Client.updateAttachment(id: id, description: attachment.attachmentDescription, focus: nil)
+            _ = try? await mastodonController.run(req)
+        }
+    }
+    
     enum Error: Swift.Error, LocalizedError {
         case attachmentData(index: Int, cause: AttachmentData.Error)
         case attachmentUpload(index: Int, cause: Client.Error)

Packages/ComposeUI/Sources/ComposeUI/ComposeMastodonContext.swift

@@ -23,4 +23,6 @@ public protocol ComposeMastodonContext {
     func cachedRelationship(for accountID: String) -> RelationshipProtocol?
     @MainActor
     func searchCachedHashtags(query: String) -> [Hashtag]
+    
+    func storeCreatedStatus(_ status: Status)
 }

Packages/ComposeUI/Sources/ComposeUI/Controllers/AttachmentRowController.swift

@@ -25,7 +25,7 @@ class AttachmentRowController: ViewController {
     init(parent: ComposeController, attachment: DraftAttachment) {
         self.parent = parent
         self.attachment = attachment
-        self.thumbnailController = AttachmentThumbnailController(attachment: attachment)
+        self.thumbnailController = AttachmentThumbnailController(attachment: attachment, parent: parent)
         
         descriptionObservation = attachment.observe(\.attachmentDescription, changeHandler: { [unowned self] _, _ in
             // the faultingState is non-zero for objects that are being cascade deleted when the draft is deleted

Packages/ComposeUI/Sources/ComposeUI/Controllers/AttachmentThumbnailController.swift

@@ -11,14 +11,16 @@ import Photos
 import TuskerComponents
 
 class AttachmentThumbnailController: ViewController {
+    unowned let parent: ComposeController
     let attachment: DraftAttachment
     
     @Published private var image: UIImage?
     @Published private var gifController: GIFController?
     @Published private var fullSize: Bool = false
     
-    init(attachment: DraftAttachment) {
+    init(attachment: DraftAttachment, parent: ComposeController) {
         self.attachment = attachment
+        self.parent = parent
     }
     
     func loadImageIfNecessary(fullSize: Bool) {
@@ -28,6 +30,24 @@ class AttachmentThumbnailController: ViewController {
         self.fullSize = fullSize
         
         switch attachment.data {
+        case .editing(_, let kind, let url):
+            switch kind {
+            case .image:
+                Task { @MainActor in
+                    self.image = await parent.fetchAttachment(url)
+                }
+                
+            case .video, .gifv:
+                let asset = AVURLAsset(url: url)
+                let imageGenerator = AVAssetImageGenerator(asset: asset)
+                if let cgImage = try? imageGenerator.copyCGImage(at: .zero, actualTime: nil) {
+                    self.image = UIImage(cgImage: cgImage)
+                }
+
+            case .audio, .unknown:
+                break
+            }
+            
         case .asset(let id):
             guard let asset = PHAsset.fetchAssets(withLocalIdentifiers: [id], options: nil).firstObject else {
                 return

Packages/ComposeUI/Sources/ComposeUI/Controllers/ComposeController.swift

@@ -12,6 +12,7 @@ import TuskerComponents
 import MatchedGeometryPresentation
 
 public final class ComposeController: ViewController {
+    public typealias FetchAttachment = (URL) async  -> UIImage?
     public typealias FetchStatus = (String) -> (any StatusProtocol)?
     public typealias DisplayNameLabel = (any AccountProtocol, Font.TextStyle, CGFloat) -> AnyView
     public typealias CurrentAccountContainerView = (AnyView) -> AnyView
@@ -22,6 +23,7 @@ public final class ComposeController: ViewController {
     @Published public var config: ComposeUIConfig
     @Published public var mastodonController: ComposeMastodonContext
     let fetchAvatar: AvatarImageView.FetchAvatar
+    let fetchAttachment: FetchAttachment
     let fetchStatus: FetchStatus
     let displayNameLabel: DisplayNameLabel
     let currentAccountContainerView: CurrentAccountContainerView
@@ -64,11 +66,12 @@ public final class ComposeController: ViewController {
     }
     
     var postButtonEnabled: Bool {
-        draft.hasContent
+        draft.editedStatusID != nil ||
-            && charactersRemaining >= 0
+            (draft.hasContent
-            && !isPosting
+                && charactersRemaining >= 0
-            && attachmentsListController.isValid
+                && !isPosting
-            && isPollValid
+                && attachmentsListController.isValid
+                && isPollValid)
     }
     
     private var isPollValid: Bool {
@@ -79,6 +82,8 @@ public final class ComposeController: ViewController {
         if let id = draft.inReplyToID,
            let status = fetchStatus(id) {
             return "Reply to @\(status.account.acct)"
+        } else if draft.editedStatusID != nil {
+            return "Edit Post"
         } else {
             return "New Post"
         }
@@ -89,6 +94,7 @@ public final class ComposeController: ViewController {
         config: ComposeUIConfig,
         mastodonController: ComposeMastodonContext,
         fetchAvatar: @escaping AvatarImageView.FetchAvatar,
+        fetchAttachment: @escaping FetchAttachment,
         fetchStatus: @escaping FetchStatus,
         displayNameLabel: @escaping DisplayNameLabel,
         currentAccountContainerView: @escaping CurrentAccountContainerView = { $0 },
@@ -99,6 +105,7 @@ public final class ComposeController: ViewController {
         self.config = config
         self.mastodonController = mastodonController
         self.fetchAvatar = fetchAvatar
+        self.fetchAttachment = fetchAttachment
         self.fetchStatus = fetchStatus
         self.displayNameLabel = displayNameLabel
         self.currentAccountContainerView = currentAccountContainerView
@@ -170,7 +177,7 @@ public final class ComposeController: ViewController {
     
     func postStatus() {
         guard !isPosting,
-              draft.hasContent else {
+              draft.editedStatusID != nil || draft.hasContent else {
             return
         }
         
@@ -396,20 +403,27 @@ public final class ComposeController: ViewController {
                     .font(.system(size: 17, weight: .regular))
             }
             .confirmationDialog("Are you sure?", isPresented: $controller.isShowingSaveDraftSheet) {
-                Button(action: { controller.cancel(deleteDraft: false) }) {
+                // edit drafts can't be saved
-                    Text("Save Draft")
+                if draft.editedStatusID == nil {
-                }
+                    Button(action: { controller.cancel(deleteDraft: false) }) {
-                Button(role: .destructive, action: { controller.cancel(deleteDraft: true) }) {
+                        Text("Save Draft")
-                    Text("Delete Draft")
+                    }
+                    Button(role: .destructive, action: { controller.cancel(deleteDraft: true) }) {
+                        Text("Delete Draft")
+                    }
+                } else {
+                    Button(role: .destructive, action: { controller.cancel(deleteDraft: true) }) {
+                        Text("Cancel Edit")
+                    }
                 }
             }
         }
         
         @ViewBuilder
         private var postButton: some View {
-            if draft.hasContent || !controller.config.allowSwitchingDrafts {
+            if draft.hasContent || draft.editedStatusID != nil || !controller.config.allowSwitchingDrafts {
                 Button(action: controller.postStatus) {
-                    Text("Post")
+                    Text(draft.editedStatusID == nil ? "Post" : "Edit")
                 }
                 .keyboardShortcut(.return, modifiers: .command)
                 .disabled(!controller.postButtonEnabled)

Packages/ComposeUI/Sources/ComposeUI/Controllers/DraftsController.swift

@@ -119,10 +119,18 @@ class DraftsController: ViewController {
 
 private struct DraftRow: View {
     @ObservedObject var draft: Draft
+    @EnvironmentObject private var controller: DraftsController
     
     var body: some View {
         HStack {
             VStack(alignment: .leading) {
+                if draft.editedStatusID != nil {
+                    // shouldn't happen unless the app crashed/was killed during an edit
+                    Text("Edit")
+                        .font(.body.bold())
+                        .foregroundColor(.orange)
+                }
+                
                 if draft.contentWarningEnabled {
                     Text(draft.contentWarning)
                         .font(.body.bold())
@@ -134,7 +142,7 @@ private struct DraftRow: View {
                 
                 HStack(spacing: 8) {
                     ForEach(draft.draftAttachments) { attachment in
-                        ControllerView(controller: { AttachmentThumbnailController(attachment: attachment) })
+                        ControllerView(controller: { AttachmentThumbnailController(attachment: attachment, parent: controller.parent) })
                             .aspectRatio(contentMode: .fit)
                             .clipShape(RoundedRectangle(cornerRadius: 5))
                             .frame(height: 50)

Packages/ComposeUI/Sources/ComposeUI/Controllers/ToolbarController.swift

@@ -59,10 +59,12 @@ class ToolbarController: ViewController {
                     MenuPicker(selection: $draft.visibility, options: ToolbarController.visibilityOptions, buttonStyle: .iconOnly)
                     // the button has a bunch of extra space by default, but combined with what we add it's too much
                         .padding(.horizontal, -8)
+                        .disabled(draft.editedStatusID != nil)
                     
                     if composeController.mastodonController.instanceFeatures.localOnlyPosts {
                         localOnlyPicker
                             .padding(.horizontal, -8)
+                            .disabled(draft.editedStatusID != nil)
                     }
                     
                     if let currentInput = composeController.currentInput,

Packages/ComposeUI/Sources/ComposeUI/CoreData/Draft.swift

@@ -23,6 +23,7 @@ public class Draft: NSManagedObject, Identifiable {
     @NSManaged public var accountID: String
     @NSManaged public var contentWarning: String
     @NSManaged public var contentWarningEnabled: Bool
+    @NSManaged public var editedStatusID: String?
     @NSManaged public var id: UUID
     @NSManaged public var initialText: String
     @NSManaged public var inReplyToID: String?

Packages/ComposeUI/Sources/ComposeUI/CoreData/DraftAttachment.swift

@@ -10,6 +10,7 @@ import PencilKit
 import UniformTypeIdentifiers
 import Photos
 import InstanceFeatures
+import Pachyderm
 
 private let decoder = PropertyListDecoder()
 private let encoder = PropertyListEncoder()
@@ -20,6 +21,9 @@ public final class DraftAttachment: NSManagedObject, Identifiable {
     @NSManaged internal var assetID: String?
     @NSManaged public var attachmentDescription: String
     @NSManaged internal private(set) var drawingData: Data?
+    @NSManaged public var editedAttachmentID: String?
+    @NSManaged private var editedAttachmentKindString: String?
+    @NSManaged public var editedAttachmentURL: URL?
     @NSManaged public var fileURL: URL?
     @NSManaged internal var fileType: String?
     @NSManaged public var id: UUID
@@ -41,7 +45,9 @@ public final class DraftAttachment: NSManagedObject, Identifiable {
     }
     
     public var data: AttachmentData {
-        if let assetID {
+        if let editedAttachmentID {
+            return .editing(editedAttachmentID, editedAttachmentKind!, editedAttachmentURL!)
+        } else if let assetID {
             return .asset(assetID)
         } else if let drawing {
             return .drawing(drawing)
@@ -52,10 +58,20 @@ public final class DraftAttachment: NSManagedObject, Identifiable {
         }
     }
     
+    public var editedAttachmentKind: Attachment.Kind? {
+        get {
+            editedAttachmentKindString.flatMap(Attachment.Kind.init(rawValue:))
+        }
+        set {
+            editedAttachmentKindString = newValue?.rawValue
+        }
+    }
+    
     public enum AttachmentData {
         case asset(String)
         case drawing(PKDrawing)
         case file(URL, UTType)
+        case editing(String, Attachment.Kind, URL)
     }
     
     public override func prepareForDeletion() {
@@ -69,7 +85,18 @@ public final class DraftAttachment: NSManagedObject, Identifiable {
 
 extension DraftAttachment {
     var type: AttachmentType {
-        if let assetID {
+        if let editedAttachmentKind {
+            switch editedAttachmentKind {
+            case .image:
+                return .image
+            case .video:
+                return .video
+            case .gifv:
+                return .video
+            case .audio, .unknown:
+                return .unknown
+            }
+        } else if let assetID {
             guard let asset = PHAsset.fetchAssets(withLocalIdentifiers: [assetID], options: nil).firstObject else {
                 return .unknown
             }

Packages/ComposeUI/Sources/ComposeUI/CoreData/Drafts.xcdatamodeld/Drafts.xcdatamodel/contents

@@ -4,6 +4,7 @@
         <attribute name="accountID" attributeType="String"/>
         <attribute name="contentWarning" attributeType="String" defaultValueString=""/>
         <attribute name="contentWarningEnabled" attributeType="Boolean" defaultValueString="NO" usesScalarValueType="YES"/>
+        <attribute name="editedStatusID" optional="YES" attributeType="String"/>
         <attribute name="id" attributeType="UUID" usesScalarValueType="NO"/>
         <attribute name="initialText" attributeType="String"/>
         <attribute name="inReplyToID" optional="YES" attributeType="String"/>
@@ -19,6 +20,9 @@
         <attribute name="assetID" optional="YES" attributeType="String"/>
         <attribute name="attachmentDescription" attributeType="String" defaultValueString=""/>
         <attribute name="drawingData" optional="YES" attributeType="Binary"/>
+        <attribute name="editedAttachmentID" optional="YES" attributeType="String"/>
+        <attribute name="editedAttachmentKindString" optional="YES" attributeType="String"/>
+        <attribute name="editedAttachmentURL" optional="YES" attributeType="URI"/>
         <attribute name="fileType" optional="YES" attributeType="String"/>
         <attribute name="fileURL" optional="YES" attributeType="URI"/>
         <attribute name="id" attributeType="UUID" usesScalarValueType="NO"/>

Packages/ComposeUI/Sources/ComposeUI/CoreData/DraftsPersistentContainer.swift

@@ -96,6 +96,67 @@ public class DraftsPersistentContainer: NSPersistentContainer {
         return draft
     }
     
+    public func createEditDraft(
+        accountID: String,
+        source: StatusSource,
+        inReplyToID: String?,
+        visibility: Visibility,
+        localOnly: Bool,
+        attachments: [Attachment],
+        poll: Pachyderm.Poll?
+    ) -> Draft {
+        let draft = Draft(context: viewContext)
+        draft.accountID = accountID
+        draft.editedStatusID = source.id
+        draft.text = source.text
+        draft.initialText = source.text
+        draft.contentWarning = source.spoilerText
+        draft.contentWarningEnabled = !source.spoilerText.isEmpty
+        draft.inReplyToID = inReplyToID
+        draft.visibility = visibility
+        draft.localOnly = localOnly
+        for attachment in attachments {
+            createEditDraftAttachment(attachment, in: draft)
+        }
+        if let existingPoll = poll {
+            let poll = Poll(context: viewContext)
+            poll.draft = draft
+            draft.poll = poll
+            if let expiresAt = existingPoll.expiresAt,
+               !existingPoll.effectiveExpired {
+                poll.duration = PollController.Duration.allCases.max(by: {
+                    (expiresAt.timeIntervalSinceNow - $0.timeInterval) < (expiresAt.timeIntervalSinceNow - $1.timeInterval)
+                })!.timeInterval
+            } else {
+                poll.duration = PollController.Duration.oneDay.timeInterval
+            }
+            poll.multiple = existingPoll.multiple
+            // rmeove default empty options
+            for opt in poll.pollOptions {
+                viewContext.delete(opt)
+            }
+            for existingOpt in existingPoll.options {
+                let opt = PollOption(context: viewContext)
+                opt.poll = poll
+                poll.options.add(opt)
+                opt.text = existingOpt.title
+            }
+        }
+        save()
+        return draft
+    }
+    
+    private func createEditDraftAttachment(_ attachment: Attachment, in draft: Draft) {
+        let draftAttachment = DraftAttachment(context: viewContext)
+        draftAttachment.id = UUID()
+        draftAttachment.attachmentDescription = attachment.description ?? ""
+        draftAttachment.editedAttachmentID = attachment.id
+        draftAttachment.editedAttachmentKind = attachment.kind
+        draftAttachment.editedAttachmentURL = attachment.url
+        draftAttachment.draft = draft
+        draft.attachments.add(draftAttachment)
+    }
+    
     @objc private func remoteChanges(_ notification: Foundation.Notification) {
         guard let newHistoryToken = notification.userInfo?[NSPersistentHistoryTokenKey] as? NSPersistentHistoryToken else {
             return

Packages/InstanceFeatures/Sources/InstanceFeatures/InstanceFeatures.swift

@@ -115,6 +115,15 @@ public class InstanceFeatures: ObservableObject {
         instanceType.isMastodon || instanceType.isPleroma(.akkoma(nil))
     }
     
+    public var editStatuses: Bool {
+        // todo: does this require a particular akkoma version?
+        hasMastodonVersion(3, 5, 0) || instanceType.isPleroma(.akkoma(nil))
+    }
+    
+    public var needsEditAttachmentsInSeparateRequest: Bool {
+        instanceType.isPleroma(.akkoma(nil))
+    }
+    
     public init() {
     }
     

Packages/Pachyderm/Sources/Pachyderm/Client.swift

@@ -315,6 +315,13 @@ public class Client {
             ], attachment))
     }
     
+    public static func updateAttachment(id: String, description: String?, focus: (Float, Float)?) -> Request<Attachment> {
+        return Request(method: .put, path: "/api/v1/media/\(id)", body: FormDataBody([
+            "description" => description,
+            "focus" => focus
+        ], nil))
+    }
+    
     // MARK: - Mutes
     public static func getMutes(range: RequestRange) -> Request<[Account]> {
         var request = Request<[Account]>(method: .get, path: "/api/v1/mutes")
@@ -382,7 +389,7 @@ public class Client {
     public static func createStatus(text: String,
                                     contentType: StatusContentType = .plain,
                                     inReplyTo: String? = nil,
-                                    media: [Attachment]? = nil,
+                                    mediaIDs: [String]? = nil,
                                     sensitive: Bool? = nil,
                                     spoilerText: String? = nil,
                                     visibility: Visibility? = nil,
@@ -402,7 +409,32 @@ public class Client {
                 "poll[expires_in]" => pollExpiresIn,
                 "poll[multiple]" => pollMultiple,
                 "local_only" => localOnly,
-            ] + "media_ids" => media?.map { $0.id } + "poll[options]" => pollOptions))
+            ] + "media_ids" => mediaIDs + "poll[options]" => pollOptions))
+    }
+    
+    public static func editStatus(
+        id: String,
+        text: String,
+        contentType: StatusContentType = .plain,
+        spoilerText: String?,
+        sensitive: Bool,
+        language: String?,
+        mediaIDs: [String],
+        mediaAttributes: [EditStatusMediaAttributes],
+        poll: EditPollParameters?
+    ) -> Request<Status> {
+        let params = EditStatusParameters(
+            id: id,
+            text: text,
+            contentType: contentType,
+            spoilerText: spoilerText,
+            sensitive: sensitive,
+            language: language,
+            mediaIDs: mediaIDs,
+            mediaAttributes: mediaAttributes,
+            poll: poll
+        )
+        return Request(method: .put, path: "/api/v1/statuses/\(id)", body: JsonBody(params))
     }
     
     // MARK: - Timelines

Packages/Pachyderm/Sources/Pachyderm/Model/EditStatusParameters.swift

@@ -0,0 +1,97 @@
+//
+//  EditStatusParameters.swift
+//  Pachyderm
+//
+//  Created by Shadowfacts on 5/10/23.
+//
+
+import Foundation
+
+struct EditStatusParameters: Encodable, Sendable {
+    let id: String
+    let text: String
+    let contentType: StatusContentType
+    let spoilerText: String?
+    let sensitive: Bool
+    let language: String?
+    let mediaIDs: [String]
+    let mediaAttributes: [EditStatusMediaAttributes]
+    let poll: EditPollParameters?
+    
+    func encode(to encoder: Encoder) throws {
+        var container = encoder.container(keyedBy: CodingKeys.self)
+        try container.encode(self.id, forKey: .id)
+        try container.encode(self.text, forKey: .text)
+        try container.encode(self.contentType, forKey: .contentType)
+        try container.encodeIfPresent(self.spoilerText, forKey: .spoilerText)
+        try container.encode(self.sensitive, forKey: .sensitive)
+        try container.encodeIfPresent(self.language, forKey: .language)
+        try container.encode(self.mediaIDs, forKey: .mediaIDs)
+        try container.encode(self.mediaAttributes, forKey: .mediaAttributes)
+        try container.encodeIfPresent(self.poll, forKey: .poll)
+    }
+    
+    enum CodingKeys: String, CodingKey {
+        case id
+        case text = "status"
+        case contentType = "content_type"
+        case spoilerText = "spoiler_text"
+        case sensitive
+        case language
+        case mediaIDs = "media_ids"
+        case mediaAttributes = "media_attributes"
+        case poll
+    }
+}
+
+public struct EditPollParameters: Encodable, Sendable {
+    let options: [String]
+    let expiresIn: Int
+    let multiple: Bool
+    
+    public init(options: [String], expiresIn: Int, multiple: Bool) {
+        self.options = options
+        self.expiresIn = expiresIn
+        self.multiple = multiple
+    }
+    
+    public func encode(to encoder: Encoder) throws {
+        var container = encoder.container(keyedBy: CodingKeys.self)
+        try container.encode(self.options, forKey: .options)
+        try container.encode(self.expiresIn, forKey: .expiresIn)
+        try container.encode(self.multiple, forKey: .multiple)
+    }
+    
+    enum CodingKeys: String, CodingKey {
+        case options
+        case expiresIn = "expires_in"
+        case multiple
+    }
+}
+
+public struct EditStatusMediaAttributes: Encodable, Sendable {
+    let id: String
+    let description: String
+    let focus: (Float, Float)?
+    
+    public init(id: String, description: String, focus: (Float, Float)?) {
+        self.id = id
+        self.description = description
+        self.focus = focus
+    }
+    
+    public func encode(to encoder: Encoder) throws {
+        var container = encoder.container(keyedBy: CodingKeys.self)
+        try container.encode(id, forKey: .id)
+        try container.encode(description, forKey: .description)
+        if let focus {
+            try container.encode("\(focus.0),\(focus.1)", forKey: .focus)
+        }
+    }
+    
+    enum CodingKeys: String, CodingKey {
+        case id
+        case description
+        case focus
+    }
+}

Packages/Pachyderm/Sources/Pachyderm/Model/Status.swift

@@ -163,6 +163,10 @@ public final class Status: StatusProtocol, Decodable, Sendable {
         return Request<Status>(method: .post, path: "/api/v1/statuses/\(statusID)/unmute")
     }
     
+    public static func source(_ statusID: String) -> Request<StatusSource> {
+        return Request(method: .get, path: "/api/v1/statuses/\(statusID)/source")
+    }
+    
     private enum CodingKeys: String, CodingKey {
         case id
         case uri

Packages/Pachyderm/Sources/Pachyderm/Model/StatusSource.swift

@@ -0,0 +1,20 @@
+//
+//  StatusSource.swift
+//  Pachyderm
+//
+//  Created by Shadowfacts on 5/10/23.
+//
+
+import Foundation
+
+public struct StatusSource: Decodable {
+    public let id: String
+    public let text: String
+    public let spoilerText: String
+    
+    enum CodingKeys: String, CodingKey {
+        case id
+        case text
+        case spoilerText = "spoiler_text"
+    }
+}

ShareExtension/ShareHostingController.swift

@@ -36,6 +36,7 @@ class ShareHostingController: UIHostingController<ShareHostingController.View> {
             config: ComposeUIConfig(),
             mastodonController: mastodonContext,
             fetchAvatar: Self.fetchAvatar,
+            fetchAttachment: { _ in fatalError("edits aren't allowed in share sheet, can't fetch existing attachment") },
             fetchStatus: { _ in fatalError("replies aren't allowed in share sheet") },
             displayNameLabel: { account, style, _ in AnyView(Text(account.displayName).font(.system(style))) },
             currentAccountContainerView: { AnyView(SwitchAccountContainerView(content: $0, mastodonContextPublisher: mastodonContextPublisher)) },

ShareExtension/ShareMastodonContext.swift

@@ -89,4 +89,7 @@ class ShareMastodonContext: ComposeMastodonContext, ObservableObject {
     func searchCachedHashtags(query: String) -> [Hashtag] {
         return []
     }
+    
+    func storeCreatedStatus(_ status: Status) {
+    }
 }

Tusker.xcodeproj/project.pbxproj

@@ -296,6 +296,7 @@
 		D6D4DDF0212518A200E1C4BB /* TuskerUITests.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6D4DDEF212518A200E1C4BB /* TuskerUITests.swift */; };
 		D6D706A029466649000827ED /* ScrollingSegmentedControl.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6D7069F29466649000827ED /* ScrollingSegmentedControl.swift */; };
 		D6D706A72948D4D0000827ED /* TimlineState.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6D706A62948D4D0000827ED /* TimlineState.swift */; };
+		D6D79F262A0C8D2700AB2315 /* FetchStatusSourceService.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6D79F252A0C8D2700AB2315 /* FetchStatusSourceService.swift */; };
 		D6D94955298963A900C59229 /* Colors.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6D94954298963A900C59229 /* Colors.swift */; };
 		D6D9498D298CBB4000C59229 /* TrendingStatusCollectionViewCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6D9498C298CBB4000C59229 /* TrendingStatusCollectionViewCell.swift */; };
 		D6D9498F298EB79400C59229 /* CopyableLable.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6D9498E298EB79400C59229 /* CopyableLable.swift */; };
@@ -690,6 +691,7 @@
 		D6D7069F29466649000827ED /* ScrollingSegmentedControl.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ScrollingSegmentedControl.swift; sourceTree = "<group>"; };
 		D6D706A62948D4D0000827ED /* TimlineState.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TimlineState.swift; sourceTree = "<group>"; };
 		D6D706A829498C82000827ED /* Tusker.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = Tusker.xcconfig; sourceTree = "<group>"; };
+		D6D79F252A0C8D2700AB2315 /* FetchStatusSourceService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FetchStatusSourceService.swift; sourceTree = "<group>"; };
 		D6D94954298963A900C59229 /* Colors.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Colors.swift; sourceTree = "<group>"; };
 		D6D9498C298CBB4000C59229 /* TrendingStatusCollectionViewCell.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TrendingStatusCollectionViewCell.swift; sourceTree = "<group>"; };
 		D6D9498E298EB79400C59229 /* CopyableLable.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CopyableLable.swift; sourceTree = "<group>"; };
@@ -1596,6 +1598,7 @@
 				D65B4B6129771A3F00DABDFB /* FetchStatusService.swift */,
 				D65B4B6529773AE600DABDFB /* DeleteStatusService.swift */,
 				D6DD8FFC298495A8002AD3FD /* LogoutService.swift */,
+				D6D79F252A0C8D2700AB2315 /* FetchStatusSourceService.swift */,
 			);
 			path = API;
 			sourceTree = "<group>";
@@ -2040,6 +2043,7 @@
 				D6EBF01523C55C0900AE061B /* UIApplication+Scenes.swift in Sources */,
 				D6538945214D6D7500E3CEFC /* TableViewSwipeActionProvider.swift in Sources */,
 				D6F0B17524A3A1AA001E48C3 /* MainSidebarViewController.swift in Sources */,
+				D6D79F262A0C8D2700AB2315 /* FetchStatusSourceService.swift in Sources */,
 				D62E9985279CA23900C26176 /* URLSession+Development.swift in Sources */,
 				D61F75B7293C119700C0B37F /* Filterer.swift in Sources */,
 				D64AAE9526C88C5000FC57FB /* ToastableViewController.swift in Sources */,

Tusker/API/FetchStatusSourceService.swift

@@ -0,0 +1,26 @@
+//
+//  FetchStatusSourceService.swift
+//  Tusker
+//
+//  Created by Shadowfacts on 5/10/23.
+//  Copyright © 2023 Shadowfacts. All rights reserved.
+//
+
+import Foundation
+import Pachyderm
+
+@MainActor
+class FetchStatusSourceService {
+    let statusID: String
+    let delegate: TuskerNavigationDelegate
+    
+    init(statusID: String, delegate: TuskerNavigationDelegate) {
+        self.statusID = statusID
+        self.delegate = delegate
+    }
+    
+    func run() async throws -> StatusSource {
+        // todo: show loading indicator if this takes longer than a certain time
+        return try await delegate.apiController.run(Status.source(statusID)).0
+    }
+}

Tusker/API/MastodonController.swift

@@ -506,6 +506,20 @@ class MastodonController: ObservableObject {
         )
     }
     
+    func createDraft(editing status: StatusMO, source: StatusSource) -> Draft {
+        precondition(status.id == source.id)
+        let draft = DraftsPersistentContainer.shared.createEditDraft(
+            accountID: accountInfo!.id,
+            source: source,
+            inReplyToID: status.inReplyToID,
+            visibility: status.visibility,
+            localOnly: status.localOnly,
+            attachments: status.attachments,
+            poll: status.poll
+        )
+        return draft
+    }
+    
 }
 
 private func setInstanceBreadcrumb(instance: Instance, nodeInfo: NodeInfo?) {

Tusker/CoreData/Tusker.xcdatamodeld/Tusker.xcdatamodel/contents

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
-<model type="com.apple.IDECoreDataModeler.DataModel" documentVersion="1.0" lastSavedToolsVersion="21513" systemVersion="22C65" minimumToolsVersion="Automatic" sourceLanguage="Swift" userDefinedModelVersionIdentifier="">
+<model type="com.apple.IDECoreDataModeler.DataModel" documentVersion="1.0" lastSavedToolsVersion="21754" systemVersion="22D49" minimumToolsVersion="Automatic" sourceLanguage="Swift" userDefinedModelVersionIdentifier="">
     <entity name="Account" representedClassName="AccountMO" syncable="YES">
         <attribute name="acct" attributeType="String"/>
         <attribute name="avatar" optional="YES" attributeType="URI"/>
@@ -97,7 +97,7 @@
         <attribute name="inReplyToAccountID" optional="YES" attributeType="String"/>
         <attribute name="inReplyToID" optional="YES" attributeType="String"/>
         <attribute name="lastFetchedAt" optional="YES" attributeType="Date" usesScalarValueType="NO"/>
-        <attribute name="localOnly" optional="YES" attributeType="Boolean" usesScalarValueType="YES"/>
+        <attribute name="localOnly" attributeType="Boolean" defaultValueString="NO" usesScalarValueType="YES"/>
         <attribute name="mentionsData" attributeType="Binary"/>
         <attribute name="muted" optional="YES" attributeType="Boolean" usesScalarValueType="YES"/>
         <attribute name="pinnedInternal" optional="YES" attributeType="Boolean" usesScalarValueType="YES"/>

Tusker/Screens/Compose/ComposeHostingController.swift

@@ -39,6 +39,7 @@ class ComposeHostingController: UIHostingController<ComposeHostingController.Vie
             config: ComposeUIConfig(),
             mastodonController: mastodonController,
             fetchAvatar: { @MainActor in await ImageCache.avatars.get($0).1 },
+            fetchAttachment: { @MainActor in await ImageCache.attachments.get($0).1 },
             fetchStatus: { mastodonController.persistentContainer.status(for: $0) },
             displayNameLabel: { AnyView(AccountDisplayNameLabel(account: $0, textStyle: $1, emojiSize: $2)) },
             replyContentView: { AnyView(ComposeReplyContentView(status: $0, mastodonController: mastodonController, heightChanged: $1)) },
@@ -210,6 +211,10 @@ extension MastodonController: ComposeMastodonContext {
         }
         return results
     }
+    
+    func storeCreatedStatus(_ status: Status) {
+        persistentContainer.addOrUpdate(status: status)
+    }
 }
 
 extension ComposeHostingController: PHPickerViewControllerDelegate {

Tusker/Screens/Utilities/Previewing.swift

@@ -300,6 +300,41 @@ extension MenuActionProvider {
                 }))
             }
             
+            if mastodonController.instanceFeatures.editStatuses {
+                actionsSection.append(UIAction(title: "Edit Post", image: UIImage(systemName: "pencil"), handler: { [weak self] _ in
+                    guard let navigationDelegate = self?.navigationDelegate else {
+                        return
+                    }
+                    @MainActor func doEdit() async {
+                        let source: StatusSource
+                        do {
+                            source = try await FetchStatusSourceService(statusID: status.id, delegate: navigationDelegate).run()
+                        } catch let error as Client.Error {
+                            self?.handleError(error, title: "Error Fetching Source")
+                            return
+                        } catch {
+                            return
+                        }
+                        let draft = navigationDelegate.apiController.createDraft(editing: status, source: source)
+                        navigationDelegate.compose(editing: draft)
+                    }
+                    if status.poll != nil {
+                        let alert = UIAlertController(title: "Edit Post with Poll?", message: "This will remove any votes that have already been placed.", preferredStyle: .alert)
+                        alert.addAction(UIAlertAction(title: "Cancel", style: .cancel))
+                        alert.addAction(UIAlertAction(title: "Edit", style: .default, handler: { _ in
+                            Task {
+                                await doEdit()
+                            }
+                        }))
+                        navigationDelegate.present(alert, animated: true)
+                    } else {
+                        Task {
+                            await doEdit()
+                        }
+                    }
+                }))
+            }
+            
             actionsSection.append(UIMenu(title: "Delete Post", image: UIImage(systemName: "trash"), children: [
                 UIAction(title: "Cancel", handler: { _ in }),
                 UIAction(title: "Delete Post", image: UIImage(systemName: "trash"), attributes: .destructive, handler: { [weak self] _ in

Tusker/Views/Attachments/AttachmentsContainerView.swift

@@ -15,7 +15,7 @@ class AttachmentsContainerView: UIView {
     
     weak var delegate: AttachmentViewDelegate?
     
-    var statusID: String!
+    private var attachmentTokens: [AttachmentToken] = []
     var attachments: [Attachment]!
     
     let attachmentViews: NSHashTable<AttachmentView> = .weakObjects()
@@ -61,12 +61,15 @@ class AttachmentsContainerView: UIView {
     // MARK: - User Interaface
     
     func updateUI(status: StatusMO) {
-        guard self.statusID != status.id else {
+        let showableAttachments = status.attachments.filter { AttachmentsContainerView.supportedAttachmentTypes.contains($0.kind) }
+        let newTokens = showableAttachments.map { AttachmentToken(attachment: $0) }
+        
+        guard self.attachmentTokens != newTokens else {
             return
         }
         
-        self.statusID = status.id
+        self.attachments = showableAttachments
-        attachments = status.attachments.filter { AttachmentsContainerView.supportedAttachmentTypes.contains($0.kind) }
+        self.attachmentTokens = newTokens
         
         attachmentViews.allObjects.forEach { $0.removeFromSuperview() }
         attachmentViews.removeAllObjects()
@@ -461,3 +464,15 @@ fileprivate extension UIView {
         return heightAnchor.constraint(equalTo: superview!.heightAnchor, multiplier: 0.5, constant: -spacing / 2)
     }
 }
+
+// A token that represents properties of attachments that the container needs to take into account when deciding whether to update
+fileprivate struct AttachmentToken: Equatable {
+    let url: URL
+    // to show the alt badge or not
+    let hasDescription: Bool
+    
+    init(attachment: Attachment) {
+        self.url = attachment.url
+        self.hasDescription = attachment.description != nil
+    }
+}

Tusker/Views/Status/StatusCollectionViewCell.swift

@@ -58,11 +58,8 @@ extension StatusCollectionViewCell {
         mastodonController.persistentContainer.statusSubject
             .receive(on: DispatchQueue.main)
             .filter { [unowned self] in $0 == self.statusID }
-            .sink { [unowned self] in
+            .sink { [unowned self] _ in
-                if let mastodonController = self.mastodonController,
+                self.delegate?.statusCellNeedsReconfigure(self, animated: true, completion: nil)
-                   let status = mastodonController.persistentContainer.status(for: $0) {
-                    self.updateStatusState(status: status)
-                }
             }
             .store(in: &cancellables)