2022-12-25 05:55:33 +00:00
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import SwiftUI
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import DesignSystem
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2022-12-25 07:17:16 +00:00
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import Models
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import Network
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2022-12-25 18:15:35 +00:00
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import PhotosUI
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@MainActor
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public class StatusEditorViewModel: ObservableObject {
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struct ImageContainer: Identifiable {
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let id = UUID().uuidString
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let image: UIImage?
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let mediaAttachement: MediaAttachement?
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let error: Error?
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}
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var mode: Mode
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let generator = UINotificationFeedbackGenerator()
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var client: Client?
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@Published var statusText = NSMutableAttributedString(string: "") {
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didSet {
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highlightMeta()
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checkEmbed()
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}
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}
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@Published var selectedRange: NSRange = .init(location: 0, length: 0)
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@Published var isPosting: Bool = false
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@Published var selectedMedias: [PhotosPickerItem] = [] {
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didSet {
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if selectedMedias.count > 4 {
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selectedMedias = selectedMedias.prefix(4).map{ $0 }
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}
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inflateSelectedMedias()
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}
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}
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@Published var mediasImages: [ImageContainer] = []
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@Published var embededStatus: Status?
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@Published var visibility: Models.Visibility = .pub
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private var uploadTask: Task<Void, Never>?
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init(mode: Mode) {
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self.mode = mode
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}
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func insertStatusText(text: String) {
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let string = statusText
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string.mutableString.insert(text, at: selectedRange.location)
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statusText = string
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selectedRange = NSRange(location: selectedRange.location + text.utf16.count, length: 0)
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}
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func postStatus() async -> Status? {
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guard let client else { return nil }
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do {
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isPosting = true
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let postStatus: Status?
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switch mode {
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case .new, .replyTo, .quote:
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postStatus = try await client.post(endpoint: Statuses.postStatus(status: statusText.string,
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inReplyTo: mode.replyToStatus?.id,
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mediaIds: mediasImages.compactMap{ $0.mediaAttachement?.id },
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spoilerText: nil,
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visibility: visibility))
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case let .edit(status):
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postStatus = try await client.put(endpoint: Statuses.editStatus(id: status.id,
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status: statusText.string,
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mediaIds: mediasImages.compactMap{ $0.mediaAttachement?.id },
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spoilerText: nil,
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visibility: visibility))
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}
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generator.notificationOccurred(.success)
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isPosting = false
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return postStatus
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} catch {
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isPosting = false
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generator.notificationOccurred(.error)
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return nil
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}
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}
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func prepareStatusText() {
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switch mode {
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case let .replyTo(status):
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statusText = .init(string: "@\(status.reblog?.account.acct ?? status.account.acct) ")
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selectedRange = .init(location: statusText.string.utf16.count, length: 0)
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case let .edit(status):
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statusText = .init(status.content.asSafeAttributedString)
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selectedRange = .init(location: 0, length: 0)
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case let .quote(status):
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self.embededStatus = status
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if let url = status.reblog?.url ?? status.url {
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statusText = .init(string: "\n\nFrom: @\(status.reblog?.account.acct ?? status.account.acct)\n\(url)")
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selectedRange = .init(location: 0, length: 0)
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}
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default:
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break
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}
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}
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private func highlightMeta() {
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statusText.addAttributes([.foregroundColor: UIColor(Color.label)],
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range: NSMakeRange(0, statusText.string.utf16.count))
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let hashtagPattern = "(#+[a-zA-Z0-9(_)]{1,})"
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let mentionPattern = "(@+[a-zA-Z0-9(_).]{1,})"
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let urlPattern = "(?i)https?://(?:www\\.)?\\S+(?:/|\\b)"
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do {
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let hashtagRegex = try NSRegularExpression(pattern: hashtagPattern, options: [])
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let mentionRegex = try NSRegularExpression(pattern: mentionPattern, options: [])
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let urlRegex = try NSRegularExpression(pattern: urlPattern, options: [])
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var ranges = hashtagRegex.matches(in: statusText.string,
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options: [],
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range: NSMakeRange(0, statusText.string.utf16.count)).map { $0.range }
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ranges.append(contentsOf: mentionRegex.matches(in: statusText.string,
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options: [],
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range: NSMakeRange(0, statusText.string.utf16.count)).map {$0.range})
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let urlRanges = urlRegex.matches(in: statusText.string,
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options: [],
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range: NSMakeRange(0, statusText.string.utf16.count)).map { $0.range }
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for range in ranges {
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statusText.addAttributes([.foregroundColor: UIColor(Color.brand)],
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range: NSRange(location: range.location, length: range.length))
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}
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for range in urlRanges {
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statusText.addAttributes([.foregroundColor: UIColor(Color.brand),
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.underlineStyle: NSUnderlineStyle.single,
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.underlineColor: UIColor(Color.brand)],
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range: NSRange(location: range.location, length: range.length))
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}
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} catch {
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}
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}
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private func checkEmbed() {
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if let embededStatus, !statusText.string.contains(embededStatus.reblog?.id ?? embededStatus.id) {
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self.embededStatus = nil
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self.mode = .new
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}
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}
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// MARK: - Media related function
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private func indexOf(container: ImageContainer) -> Int? {
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mediasImages.firstIndex(where: { $0.id == container.id })
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}
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func inflateSelectedMedias() {
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self.mediasImages = []
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Task {
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var medias: [ImageContainer] = []
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for media in selectedMedias {
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do {
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if let data = try await media.loadTransferable(type: Data.self),
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let image = UIImage(data: data) {
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medias.append(.init(image: image, mediaAttachement: nil, error: nil))
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}
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} catch {
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medias.append(.init(image: nil, mediaAttachement: nil, error: error))
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}
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}
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DispatchQueue.main.async { [weak self] in
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self?.mediasImages = medias
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self?.processUpload()
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}
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}
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}
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private func processUpload() {
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uploadTask?.cancel()
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let mediasCopy = mediasImages
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uploadTask = Task {
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for media in mediasCopy {
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if !Task.isCancelled {
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await upload(container: media)
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}
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}
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}
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}
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func upload(container: ImageContainer) async {
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if let index = indexOf(container: container) {
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let originalContainer = mediasImages[index]
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let newContainer = ImageContainer(image: originalContainer.image, mediaAttachement: nil, error: nil)
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mediasImages[index] = newContainer
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do {
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if let data = originalContainer.image?.jpegData(compressionQuality: 0.90) {
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let uploadedMedia = try await uploadMedia(data: data)
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if let index = indexOf(container: newContainer) {
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mediasImages[index] = .init(image: nil, mediaAttachement: uploadedMedia, error: nil)
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}
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}
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} catch {
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if let index = indexOf(container: newContainer) {
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mediasImages[index] = .init(image: originalContainer.image, mediaAttachement: nil, error: error)
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}
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}
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}
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}
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private func uploadMedia(data: Data) async throws -> MediaAttachement? {
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guard let client else { return nil }
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return try await client.mediaUpload(mimeType: "image/jpeg", data: data)
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}
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}
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