11//
22// AsyncImageErrors.swift
3- //
3+ //
44//
55// Created by Igor on 18.02.2023.
66//
77
88import Foundation
9+ import async_http_client
910
1011@available ( iOS 15 . 0 , macOS 12 . 0 , tvOS 15 . 0 , watchOS 8 . 0 , * )
11- enum AsyncImageErrors : Error , Equatable {
12- 13- /// Error indicating that an image could not be created from a `uiImage`
14- case imageInit
15- 16- /// Error indicating that the client was not found, likely due to an invalid URL
17- case clientIsNotDefined
18- 19- /// Error indicating that the response returned no images
20- case returnedNoImages
21- 22- /// Status is not valid
23- case httpStatus( String )
12+ /// Enum representing different errors that can occur when loading images asynchronously
13+ enum AsyncImageErrors : Error {
14+ case imageInit // Error initializing an image from data
15+ case clientIsNotDefined // HTTP client is not defined
16+ case returnedNoImages // No images were returned in the response
17+ case httpStatus( String ) // HTTP status error with a message
18+ case responseError( Error ) // Generic response error
2419}
2520
2621@available ( iOS 15 . 0 , macOS 12 . 0 , tvOS 15 . 0 , watchOS 8 . 0 , * )
@@ -33,8 +28,50 @@ extension AsyncImageErrors: LocalizedError {
3328 return NSLocalizedString ( " Client not found. The URL might be invalid. " , comment: " " )
3429 case . returnedNoImages:
3530 return NSLocalizedString ( " The response did not contain any images. " , comment: " " )
36- case . httpStatus( let data) :
37- return NSLocalizedString ( " HTTP status error: \( data) . " , comment: " " )
31+ case . httpStatus( let status) :
32+ return NSLocalizedString ( " HTTP status error: \( status) . " , comment: " " )
33+ case . responseError( let error) :
34+ return error. localizedDescription
35+ }
36+ }
37+ }
38+ 39+ @available ( iOS 15 . 0 , macOS 12 . 0 , tvOS 15 . 0 , watchOS 8 . 0 , * )
40+ extension AsyncImageErrors {
41+ /// Handles errors that occur during the request
42+ /// - Parameter error: The error that occurred
43+ /// - Returns: An instance of `AsyncImageErrors`
44+ static func handleRequest( _ error: Error ) -> AsyncImageErrors {
45+ if let httpError = error as? Http . Errors ,
46+ case let . status( _, _, data) = httpError,
47+ let responseData = data {
48+ return decodeErrorResponse ( from: responseData)
3849 }
50+ return . responseError( error)
3951 }
4052}
53+ 54+ /// Decodes the error response data
55+ /// - Parameter responseData: The response data to decode
56+ /// - Returns: An instance of `AsyncImageErrors` with a decoded message
57+ fileprivate func decodeErrorResponse( from responseData: Data ) -> AsyncImageErrors {
58+ if let apiResponse = try ? JSONDecoder ( ) . decode ( ErrorResponseWrapper . self, from: responseData) {
59+ return . httpStatus( apiResponse. error. message)
60+ }
61+ 62+ let dataString = String ( data: responseData, encoding: . utf8) ?? " Unable to decode data "
63+ return . httpStatus( dataString)
64+ }
65+ 66+ /// Defines the structure for the inner "error" object in the API response
67+ fileprivate struct ErrorResponse : Decodable {
68+ let code : String ?
69+ let message : String
70+ let param : String ?
71+ let type : String
72+ }
73+ 74+ /// Defines the structure for the overall response wrapper containing the error object
75+ fileprivate struct ErrorResponseWrapper : Decodable {
76+ let error : ErrorResponse
77+ }
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