SideStore/SideStoreApp/Sources/SideStoreAppKit/Operations/FetchTrustedSourcesOperation.swift

//
//  FetchTrustedSourcesOperation.swift
//  AltStore
//
//  Created by Riley Testut on 4/13/22.
//  Copyright © 2022 Riley Testut. All rights reserved.
//

import Foundation

private extension URL {
    #if STAGING
        static let trustedSources = URL(string: "https://raw.githubusercontent.com/SideStore/SideStore/develop/trustedapps.json")!
    #else
        static let trustedSources = URL(string: "https://raw.githubusercontent.com/SideStore/SideStore/develop/trustedapps.json")!
    #endif
}

public extension FetchTrustedSourcesOperation {
	struct TrustedSource: Decodable {
		public var identifier: String
		public var sourceURL: URL?
    }

    private struct Response: Decodable {
        var version: Int
        var sources: [FetchTrustedSourcesOperation.TrustedSource]
    }
}

public final class FetchTrustedSourcesOperation: ResultOperation<[FetchTrustedSourcesOperation.TrustedSource]> {
	public override func main() {
        super.main()

        let dataTask = URLSession.shared.dataTask(with: .trustedSources) { data, response, error in
            do {
                if let response = response as? HTTPURLResponse {
                    guard response.statusCode != 404 else {
                        self.finish(.failure(URLError(.fileDoesNotExist, userInfo: [NSURLErrorKey: URL.trustedSources])))
                        return
                    }
                }

                guard let data = data else { throw error! }

                let response = try Foundation.JSONDecoder().decode(Response.self, from: data)
                self.finish(.success(response.sources))
            } catch {
                self.finish(.failure(error))
            }
        }

        dataTask.resume()
    }
}