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| 1 | +// |
| 2 | +// TimeZone+ItemProvider.swift |
| 3 | +// TimeZone+ItemProvider |
| 4 | +// |
| 5 | +// Created by David on 11/09/2021. |
| 6 | +// |
| 7 | + |
| 8 | +import Foundation |
| 9 | +import UniformTypeIdentifiers |
| 10 | + |
| 11 | +let jsonEncoder = JSONEncoder() |
| 12 | + |
| 13 | +extension TimeZone { |
| 14 | + class ItemProvider: NSObject, NSItemProviderWriting, Codable { |
| 15 | + let identifier: String |
| 16 | + let name: String? |
| 17 | + let abbreviation: String? |
| 18 | + let flag: String |
| 19 | + |
| 20 | + var resolvedName: String { |
| 21 | + "\(self.flag) \(self.name ?? self.identifier)" |
| 22 | + } |
| 23 | + |
| 24 | + init(from timezone: TimeZone) { |
| 25 | + self.identifier = timezone.identifier |
| 26 | + self.name = timezone.localizedName(for: .standard, locale: .current) |
| 27 | + self.abbreviation = timezone.abbreviation() |
| 28 | + self.flag = flagForTimeZone(timezone) |
| 29 | + } |
| 30 | + |
| 31 | + static var writableTypeIdentifiersForItemProvider: [String] = [ |
| 32 | + UTType.json.identifier, |
| 33 | + UTType.text.identifier, UTType.utf8PlainText.identifier, UTType.plainText.identifier |
| 34 | + ] |
| 35 | + |
| 36 | + func loadData(withTypeIdentifier typeIdentifier: String, forItemProviderCompletionHandler completionHandler: @escaping (Data?, Error?) -> Void) -> Progress? { |
| 37 | + switch typeIdentifier { |
| 38 | + case UTType.json.identifier: |
| 39 | + return self.loadJson(forItemProviderCompletionHandler: completionHandler) |
| 40 | + case UTType.text.identifier, |
| 41 | + UTType.utf8PlainText.identifier, |
| 42 | + UTType.plainText.identifier: |
| 43 | + return self.loadUtf8String(forItemProviderCompletionHandler: completionHandler) |
| 44 | + default: |
| 45 | + completionHandler(nil, ItemProviderError.unrecognisedType(identifier: typeIdentifier)) |
| 46 | + return nil |
| 47 | + } |
| 48 | + } |
| 49 | + |
| 50 | + func loadJson(forItemProviderCompletionHandler completionHandler: @escaping (Data?, Error?) -> Void) -> Progress? { |
| 51 | + do { |
| 52 | + completionHandler(try jsonEncoder.encode(self), nil) |
| 53 | + } catch { |
| 54 | + completionHandler(nil, error) |
| 55 | + } |
| 56 | + return nil |
| 57 | + } |
| 58 | + |
| 59 | + func loadUtf8String(forItemProviderCompletionHandler completionHandler: @escaping (Data?, Error?) -> Void) -> Progress? { |
| 60 | + completionHandler(Data(self.resolvedName.utf8), nil) |
| 61 | + return nil |
| 62 | + } |
| 63 | + } |
| 64 | + |
| 65 | + var itemProvider: ItemProvider { |
| 66 | + TimeZone.ItemProvider(from: self) |
| 67 | + } |
| 68 | +} |
| 69 | + |
| 70 | +enum ItemProviderError: LocalizedError { |
| 71 | + case unrecognisedType(identifier: String) |
| 72 | + |
| 73 | + var errorDescription: String? { |
| 74 | + return String.localizedStringWithFormat(NSLocalizedString("ItemProvidingFailed: %@", tableName: "Errors", comment: ""), failureReason!) |
| 75 | + } |
| 76 | + |
| 77 | + var failureReason: String? { |
| 78 | + switch self { |
| 79 | + case .unrecognisedType(let identifier): |
| 80 | + return String.localizedStringWithFormat(NSLocalizedString("UnrecognisedUTI: %@", tableName: "Errors", comment: ""), identifier) |
| 81 | + } |
| 82 | + } |
| 83 | + |
| 84 | + var recoverySuggestion: String? { |
| 85 | + "Please contact support" |
| 86 | + } |
| 87 | +} |
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