63 lines
1.6 KiB
Swift
63 lines
1.6 KiB
Swift
//
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// PDFUtils.swift
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//
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//
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// Created by Jackson Harper on 6/3/22.
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//
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import CoreImage
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import Foundation
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import QuickLookThumbnailing
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import UIKit
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public enum PDFUtils {
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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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let scale = await UIScreen.main.scale
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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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