Hinduja-LMS/LMS/View Model/PdfReaderViewModel.swift

//
//  PdfReaderViewModel.swift
//  LMS
//
//  Created by Suraj Kumar Mandal on 07/09/22.
//

import Foundation
import Alamofire

class PdfReaderViewModel {
    
    var delegate: PdfReaderProtocol?
    
    func getPdfData(fileId:String) {
        if let delegate = delegate {
            delegate.startLoader()
            let accessToken = UserDefaults.standard.value(forKey: "accessToken") as! String

            let url = ApiURL.DownloadBase64 + "/\(fileId)"
            print(url)
            
            let headers: HTTPHeaders = [
                "Authorization": "Bearer \(accessToken)",
                "Accept": "application/json",
                "Content-Type": "application/json"
            ]
            print(headers)
            
            AF.request(url, 
                       method: .get,
                       encoding: URLEncoding.httpBody,
                       headers: headers)
            .responseString { response in
                if response.response?.statusCode == 200 {
                    switch response.result {
                    case .success(_):
                        delegate.stopLoader()
                        let stringData = response.description.components(separatedBy: ",")
                        delegate.pdfBase64(base64: stringData[1])
                        break
                    case .failure(let error):
                        delegate.stopLoader()
                        print(error.localizedDescription)
                        delegate.showError(error: error.localizedDescription)
                        break
                    }
                } else {
                    print("Server error")
                }
            }
        }
    }

}

protocol PdfReaderProtocol {
    func startLoader()
    func stopLoader()
    func showError(error:String)
    func pdfBase64(base64:String)
}