ImageCompressManager.swift

//
//  ImageCompressManager.swift
//  MiniScanner
//
//  Created by Mustafa Merza on 8/12/24.
//  Copyright © 2024 AppsNectar. All rights reserved.
//

import Foundation

class ImageCompressManager {
    
    static var compressType: CompressType = .wxCompress
    
    @Inject private static var deleteScanSessionUseCase: DeleteScanSessionUseCase
    
    class func compress(image: UIImage) -> UIImage {
        
        switch compressType {
        case .wxCompress:
            wxCompress(image: image)
        }
    }
    
    class func compress(scannedItem: ScannedItem) -> ScannedItem {
        
        switch compressType {
        case .wxCompress:
            wxCompress(scannedItem: scannedItem)
        }
    }
}

extension ImageCompressManager {
    
    private class func wxCompress(image: UIImage) -> UIImage {
        image.wxCompress()
    }
    
    private class func wxCompress(scannedItem: ScannedItem) -> ScannedItem {
        
        guard let originalImage = scannedItem.newOriginalImage?.retrieveImage(),
              let renderedImage = scannedItem.newRenderedImage?.retrieveImage()
                
        else { return scannedItem }
        
        // Remove the scanned item old files
        removeScannedItemFile(scannedItem: scannedItem)
        
        let compressedOriginalImage = compress(image: originalImage)
        let compressedRenderedImage = compress(image: renderedImage)
        
        let newScannedItem = scannedItem.createItem(originalImage: compressedOriginalImage,
                                                    renderedImage: compressedRenderedImage,
                                                    type: scannedItem.type)
        
        if let imageUrl = scannedItem.newOriginalImage {
            try? FileManager.default.removeItem(at: imageUrl)
        }
        
        if let imageUrl = scannedItem.newRenderedImage {
            try? FileManager.default.removeItem(at: imageUrl)
        }
        
        return newScannedItem
    }
    
    private class func removeScannedItemFile(scannedItem: ScannedItem) {
        
        let scanSession = ScanSession(id: UUID(),