Kan1aSorata.AIPaint/AIPaint/extension.swift

//
//  extension.swift
//  AIPaint
//
//  Created by Fengyu He on 2022/12/2.
//
import CommonCrypto
import UIKit

extension String {
    var sha256: String {
        let utf8 = cString(using: .utf8)
        var digest = [UInt8](repeating: 0, count: Int(CC_SHA256_DIGEST_LENGTH))
        CC_SHA256(utf8, CC_LONG(utf8!.count - 1), &digest)
        return digest.reduce("") { $0 + String(format:"%02x", $1) }
    }
    
    func encodeBase64() -> String {
        if let data = self.data(using: .utf8) {
            return data.base64EncodedString()
        }
        return ""
    }
    
    func decodeBase64() -> String? {
        if let data = Data(base64Encoded: self) {
            return String(data: data, encoding: .utf8)
        }
        return nil
    }
}

extension UIImageView {
    func downloadedFrom(url: URL, contentMode mode: UIView.ContentMode = .scaleAspectFit) {
            contentMode = mode
            URLSession.shared.dataTask(with: url) { data, response, error in
                guard
                    let httpURLResponse = response as? HTTPURLResponse, httpURLResponse.statusCode == 200,
                    let mimeType = response?.mimeType, mimeType.hasPrefix("image"),
                    let data = data, error == nil,
                    let image = UIImage(data: data)
                    else { return }
                DispatchQueue.main.async() {
                    self.image = image
                }
                }.resume()
        }
    func downloadedFrom(link: String, contentMode mode: UIView.ContentMode = .scaleAspectFit) {
            guard let url = URL(string: link) else { return }
            downloadedFrom(url: url, contentMode: mode)
    }
}