100 lines
2.8 KiB
Swift
100 lines
2.8 KiB
Swift
import CoreImage
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import Foundation
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import QuickLookThumbnailing
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#if os(iOS)
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import UIKit
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#else
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import AppKit
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#endif
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public enum PDFUtils {
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public static func copyToLocal(url: URL) throws -> String {
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let subPath = UUID().uuidString + ".pdf"
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let dest = FileManager.default
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.urls(for: .documentDirectory, in: .userDomainMask)[0]
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.appendingPathComponent(subPath)
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try FileManager.default.copyItem(at: url, to: dest)
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return subPath
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}
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public static func moveToLocal(url: URL) throws -> String {
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let subPath = UUID().uuidString + ".pdf"
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let dest = FileManager.default
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.urls(for: .documentDirectory, in: .userDomainMask)[0]
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.appendingPathComponent(subPath)
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try FileManager.default.moveItem(at: url, to: dest)
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return subPath
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}
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public static func localPdfURL(filename: String) -> URL? {
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let url = FileManager.default
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.urls(for: .documentDirectory, in: .userDomainMask)[0]
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.appendingPathComponent(filename)
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return url
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}
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public static func exists(filename: String?) -> Bool {
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if let filename = filename, let localPdfURL = localPdfURL(filename: filename) {
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let result = FileManager.default.fileExists(atPath: localPdfURL.path)
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return result
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}
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return false
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}
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public static func titleFromPdfFile(_ urlStr: String) -> String {
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let url = URL(string: urlStr)
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if let url = url {
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return url.lastPathComponent
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}
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return urlStr
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}
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public static func titleFromUrl(_ urlStr: String) -> String {
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let url = URL(string: urlStr)
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if let url = url {
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return url.lastPathComponent
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}
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return urlStr
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}
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public static func thumbnailUrl(localUrl: URL) -> URL {
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var thumbnailUrl = localUrl
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thumbnailUrl.appendPathExtension(".jpg")
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return thumbnailUrl
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}
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public static func createThumbnailFor(inputUrl: URL) async throws -> URL? {
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let size = CGSize(width: 80, height: 80)
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#if os(iOS)
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let scale = await UIScreen.main.scale
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#else
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let scale = NSScreen.main?.backingScaleFactor ?? 1
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#endif
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let outputUrl = thumbnailUrl(localUrl: inputUrl)
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// Create the thumbnail request.
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let request =
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QLThumbnailGenerator.Request(
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fileAt: inputUrl,
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size: size,
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scale: scale,
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representationTypes: .all
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)
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// Retrieve the singleton instance of the thumbnail generator and generate the thumbnails.
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let generator = QLThumbnailGenerator.shared
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return try await withCheckedThrowingContinuation { continuation in
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generator.saveBestRepresentation(for: request, to: outputUrl, contentType: UTType.jpeg.identifier) { error in
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if let error = error {
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continuation.resume(throwing: error)
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return
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}
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continuation.resume(returning: outputUrl)
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}
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}
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}
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}
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