kdan_autotest_mac/KdanAutoTest/ProcessCheckFile/Process/ProcessThumbnal.swift

//
//  ProcessThumbnal.swift
//  ProcessCheckFile
//
//  Created by 朱东勇 on 2022/12/9.
//

import Foundation

import QuickLook
import QuickLookUI
import QuickLookThumbnailing

let generator = QLThumbnailGenerator.shared

class ProcessThumbnal : NSObject {
    
    class func process(_ filePath:String, desPath:String) -> Bool {
        let kDefaultThumbnailSize = CGSizeMake(1000.0, 1000.0)
        
        return process(filePath, desPath: desPath, outputSize: kDefaultThumbnailSize)
    }
    
    class func process(_ filePath:String, desPath:String, outputSize:CGSize) -> Bool {
        var didFinished = false
        
        let semaphore = DispatchSemaphore(value: 0)
        let url = URL.init(filePath: filePath)
        generator.generateRepresentations(for: QLThumbnailGenerator.Request.init(fileAt: url, size: CGSizeMake(1024.0, 10240.0), scale: 1.0, representationTypes: QLThumbnailGenerator.Request.RepresentationTypes.thumbnail),
                                          
                                          update: { (representation, type, error) in
            let image = representation!.nsImage as NSImage
            
            if nil != image {
                didFinished = true
                
                try? image.tiffRepresentation?.write(to: URL.init(filePath: desPath))
            }
            
            semaphore.signal()
        })
        
        
        semaphore.wait()
        
        return didFinished
    }
    
}