NetNewsWire/Frameworks/Account/Feedly/Operations/FeedlyRefreshAccessTokenOpe...

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//
// FeedlyRefreshAccessTokenOperation.swift
// Account
//
// Created by Kiel Gillard on 4/11/19.
// Copyright © 2019 Ranchero Software, LLC. All rights reserved.
//
import Foundation
import os.log
import RSWeb
final class FeedlyRefreshAccessTokenOperation: FeedlyOperation {
let service: OAuthAccessTokenRefreshing
let oauthClient: OAuthAuthorizationClient
let account: Account
let log: OSLog
init(account: Account, service: OAuthAccessTokenRefreshing, oauthClient: OAuthAuthorizationClient, log: OSLog) {
self.oauthClient = oauthClient
self.service = service
self.account = account
self.log = log
}
override func run() {
let refreshToken: Credentials
do {
guard let credentials = try account.retrieveCredentials(type: .oauthRefreshToken) else {
os_log(.debug, log: log, "Could not find a refresh token in the keychain. Check the refresh token is added to the Keychain, remove the account and add it again.")
throw TransportError.httpError(status: 403)
}
refreshToken = credentials
} catch {
didFinish(with: error)
return
}
os_log(.debug, log: log, "Refreshing access token.")
// Ignore cancellation after the request is resumed otherwise we may continue storing a potentially invalid token!
service.refreshAccessToken(with: refreshToken.secret, client: oauthClient) { result in
self.didRefreshAccessToken(result)
}
}
private func didRefreshAccessToken(_ result: Result<OAuthAuthorizationGrant, Error>) {
assert(Thread.isMainThread)
switch result {
case .success(let grant):
do {
os_log(.debug, log: log, "Storing refresh token.")
// Store the refresh token first because it sends this token to the account delegate.
if let token = grant.refreshToken {
try account.storeCredentials(token)
}
os_log(.debug, log: log, "Storing access token.")
// Now store the access token because we want the account delegate to use it.
try account.storeCredentials(grant.accessToken)
didFinish()
} catch {
didFinish(with: error)
}
case .failure(let error):
didFinish(with: error)
}
}
}