548 lines
18 KiB
Swift
548 lines
18 KiB
Swift
//
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// FeedbinAPICaller.swift
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// Account
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//
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// Created by Maurice Parker on 5/2/19.
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// Copyright © 2019 Ranchero Software, LLC. All rights reserved.
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//
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// Feedbin currently has a maximum of 250 requests per second. If you begin to receive
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// HTTP Response Codes of 403, you have exceeded this limit. Wait 5 minutes and your
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// IP address will become unblocked and you can use the service again.
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import Foundation
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import RSWeb
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enum CreateSubscriptionResult {
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case created(FeedbinSubscription)
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case multipleChoice([FeedbinSubscriptionChoice])
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case alreadySubscribed
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case notFound
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}
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final class FeedbinAPICaller: NSObject {
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struct ConditionalGetKeys {
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static let subscriptions = "subscriptions"
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static let tags = "tags"
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static let taggings = "taggings"
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static let icons = "icons"
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static let unreadEntries = "unreadEntries"
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static let starredEntries = "starredEntries"
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}
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private let feedbinBaseURL = URL(string: "https://api.feedbin.com/v2/")!
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private var transport: Transport!
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var credentials: Credentials?
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weak var accountMetadata: AccountMetadata?
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init(transport: Transport) {
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super.init()
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self.transport = transport
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}
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func validateCredentials(completion: @escaping (Result<Credentials?, Error>) -> Void) {
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let callURL = feedbinBaseURL.appendingPathComponent("authentication.json")
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let request = URLRequest(url: callURL, credentials: credentials)
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transport.send(request: request) { result in
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switch result {
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case .success:
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completion(.success(self.credentials))
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case .failure(let error):
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switch error {
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case TransportError.httpError(let status):
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if status == 401 {
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completion(.success(self.credentials))
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} else {
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completion(.failure(error))
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}
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default:
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completion(.failure(error))
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}
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}
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}
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}
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func importOPML(opmlData: Data, completion: @escaping (Result<FeedbinImportResult, Error>) -> Void) {
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let callURL = feedbinBaseURL.appendingPathComponent("imports.json")
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var request = URLRequest(url: callURL, credentials: credentials)
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request.addValue("text/xml; charset=utf-8", forHTTPHeaderField: HTTPRequestHeader.contentType)
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transport.send(request: request, method: HTTPMethod.post, payload: opmlData) { result in
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switch result {
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case .success(let (_, data)):
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guard let resultData = data else {
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completion(.failure(TransportError.noData))
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break
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}
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do {
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let result = try JSONDecoder().decode(FeedbinImportResult.self, from: resultData)
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completion(.success(result))
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} catch {
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completion(.failure(error))
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}
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case .failure(let error):
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completion(.failure(error))
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}
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}
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}
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func retrieveOPMLImportResult(importID: Int, completion: @escaping (Result<FeedbinImportResult?, Error>) -> Void) {
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let callURL = feedbinBaseURL.appendingPathComponent("imports/\(importID).json")
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let request = URLRequest(url: callURL, credentials: credentials)
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transport.send(request: request, resultType: FeedbinImportResult.self) { result in
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switch result {
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case .success(let (_, importResult)):
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completion(.success(importResult))
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case .failure(let error):
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completion(.failure(error))
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}
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}
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}
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func retrieveTags(completion: @escaping (Result<[FeedbinTag]?, Error>) -> Void) {
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let callURL = feedbinBaseURL.appendingPathComponent("tags.json")
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let conditionalGet = accountMetadata?.conditionalGetInfo[ConditionalGetKeys.tags]
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let request = URLRequest(url: callURL, credentials: credentials, conditionalGet: conditionalGet)
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transport.send(request: request, resultType: [FeedbinTag].self) { result in
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switch result {
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case .success(let (response, tags)):
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self.storeConditionalGet(key: ConditionalGetKeys.tags, headers: response.allHeaderFields)
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completion(.success(tags))
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case .failure(let error):
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completion(.failure(error))
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}
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}
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}
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func renameTag(oldName: String, newName: String, completion: @escaping (Result<Void, Error>) -> Void) {
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let callURL = feedbinBaseURL.appendingPathComponent("tags.json")
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let request = URLRequest(url: callURL, credentials: credentials)
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let payload = FeedbinRenameTag(oldName: oldName, newName: newName)
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transport.send(request: request, method: HTTPMethod.post, payload: payload, completion: completion)
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}
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func retrieveSubscriptions(completion: @escaping (Result<[FeedbinSubscription]?, Error>) -> Void) {
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let callURL = feedbinBaseURL.appendingPathComponent("subscriptions.json")
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let conditionalGet = accountMetadata?.conditionalGetInfo[ConditionalGetKeys.subscriptions]
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let request = URLRequest(url: callURL, credentials: credentials, conditionalGet: conditionalGet)
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transport.send(request: request, resultType: [FeedbinSubscription].self) { result in
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switch result {
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case .success(let (response, subscriptions)):
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self.storeConditionalGet(key: ConditionalGetKeys.subscriptions, headers: response.allHeaderFields)
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completion(.success(subscriptions))
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case .failure(let error):
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completion(.failure(error))
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}
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}
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}
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func createSubscription(url: String, completion: @escaping (Result<CreateSubscriptionResult, Error>) -> Void) {
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let callURL = feedbinBaseURL.appendingPathComponent("subscriptions.json")
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var request = URLRequest(url: callURL, credentials: credentials)
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request.addValue("application/json; charset=utf-8", forHTTPHeaderField: HTTPRequestHeader.contentType)
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let payload: Data
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do {
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payload = try JSONEncoder().encode(FeedbinCreateSubscription(feedURL: url))
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} catch {
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completion(.failure(error))
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return
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}
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transport.send(request: request, method: HTTPMethod.post, payload: payload) { result in
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switch result {
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case .success(let (response, data)):
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switch response.forcedStatusCode {
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case 201:
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guard let subData = data else {
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completion(.failure(TransportError.noData))
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break
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}
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do {
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let subscription = try JSONDecoder().decode(FeedbinSubscription.self, from: subData)
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completion(.success(.created(subscription)))
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} catch {
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completion(.failure(error))
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}
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case 300:
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guard let subData = data else {
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completion(.failure(TransportError.noData))
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break
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}
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do {
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let subscriptions = try JSONDecoder().decode([FeedbinSubscriptionChoice].self, from: subData)
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completion(.success(.multipleChoice(subscriptions)))
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} catch {
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completion(.failure(error))
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}
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case 302:
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completion(.success(.alreadySubscribed))
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default:
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completion(.failure(TransportError.httpError(status: response.forcedStatusCode)))
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}
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case .failure(let error):
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switch error {
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case TransportError.httpError(let status):
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switch status {
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case 401:
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// I don't know why we get 401's here. This looks like a Feedbin bug, but it only happens
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// when you are already subscribed to the feed.
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completion(.success(.alreadySubscribed))
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case 404:
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completion(.success(.notFound))
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default:
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completion(.failure(error))
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}
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default:
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completion(.failure(error))
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}
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}
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}
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}
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func renameSubscription(subscriptionID: String, newName: String, completion: @escaping (Result<Void, Error>) -> Void) {
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let callURL = feedbinBaseURL.appendingPathComponent("subscriptions/\(subscriptionID)/update.json")
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let request = URLRequest(url: callURL, credentials: credentials)
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let payload = FeedbinUpdateSubscription(title: newName)
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transport.send(request: request, method: HTTPMethod.post, payload: payload, completion: completion)
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}
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func deleteSubscription(subscriptionID: String, completion: @escaping (Result<Void, Error>) -> Void) {
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let callURL = feedbinBaseURL.appendingPathComponent("subscriptions/\(subscriptionID).json")
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let request = URLRequest(url: callURL, credentials: credentials)
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transport.send(request: request, method: HTTPMethod.delete, completion: completion)
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}
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func retrieveTaggings(completion: @escaping (Result<[FeedbinTagging]?, Error>) -> Void) {
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let callURL = feedbinBaseURL.appendingPathComponent("taggings.json")
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let conditionalGet = accountMetadata?.conditionalGetInfo[ConditionalGetKeys.taggings]
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let request = URLRequest(url: callURL, credentials: credentials, conditionalGet: conditionalGet)
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transport.send(request: request, resultType: [FeedbinTagging].self) { result in
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switch result {
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case .success(let (response, taggings)):
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self.storeConditionalGet(key: ConditionalGetKeys.taggings, headers: response.allHeaderFields)
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completion(.success(taggings))
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case .failure(let error):
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completion(.failure(error))
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}
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}
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}
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func createTagging(feedID: Int, name: String, completion: @escaping (Result<Int, Error>) -> Void) {
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let callURL = feedbinBaseURL.appendingPathComponent("taggings.json")
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var request = URLRequest(url: callURL, credentials: credentials)
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request.addValue("application/json; charset=utf-8", forHTTPHeaderField: HTTPRequestHeader.contentType)
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let payload: Data
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do {
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payload = try JSONEncoder().encode(FeedbinCreateTagging(feedID: feedID, name: name))
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} catch {
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completion(.failure(error))
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return
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}
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transport.send(request: request, method: HTTPMethod.post, payload:payload) { result in
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switch result {
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case .success(let (response, _)):
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if let taggingLocation = response.valueForHTTPHeaderField(HTTPResponseHeader.location),
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let lowerBound = taggingLocation.range(of: "v2/taggings/")?.upperBound,
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let upperBound = taggingLocation.range(of: ".json")?.lowerBound,
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let taggingID = Int(taggingLocation[lowerBound..<upperBound]) {
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completion(.success(taggingID))
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} else {
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completion(.failure(TransportError.noData))
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}
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case .failure(let error):
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completion(.failure(error))
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}
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}
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}
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func deleteTagging(taggingID: String, completion: @escaping (Result<Void, Error>) -> Void) {
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let callURL = feedbinBaseURL.appendingPathComponent("taggings/\(taggingID).json")
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var request = URLRequest(url: callURL, credentials: credentials)
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request.addValue("application/json; charset=utf-8", forHTTPHeaderField: HTTPRequestHeader.contentType)
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transport.send(request: request, method: HTTPMethod.delete, completion: completion)
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}
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func retrieveIcons(completion: @escaping (Result<[FeedbinIcon]?, Error>) -> Void) {
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let callURL = feedbinBaseURL.appendingPathComponent("icons.json")
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let conditionalGet = accountMetadata?.conditionalGetInfo[ConditionalGetKeys.icons]
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let request = URLRequest(url: callURL, credentials: credentials, conditionalGet: conditionalGet)
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transport.send(request: request, resultType: [FeedbinIcon].self) { result in
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switch result {
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case .success(let (response, icons)):
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self.storeConditionalGet(key: ConditionalGetKeys.icons, headers: response.allHeaderFields)
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completion(.success(icons))
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case .failure(let error):
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completion(.failure(error))
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}
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}
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}
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func retrieveEntries(articleIDs: [String], completion: @escaping (Result<([FeedbinEntry]?), Error>) -> Void) {
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guard !articleIDs.isEmpty else {
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completion(.success(([FeedbinEntry]())))
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return
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}
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let concatIDs = articleIDs.reduce("") { param, articleID in return param + ",\(articleID)" }
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let paramIDs = String(concatIDs.dropFirst())
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var callComponents = URLComponents(url: feedbinBaseURL.appendingPathComponent("entries.json"), resolvingAgainstBaseURL: false)!
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callComponents.queryItems = [URLQueryItem(name: "ids", value: paramIDs), URLQueryItem(name: "mode", value: "extended")]
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let request = URLRequest(url: callComponents.url!, credentials: credentials)
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transport.send(request: request, resultType: [FeedbinEntry].self) { result in
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switch result {
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case .success(let (_, entries)):
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completion(.success((entries)))
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case .failure(let error):
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completion(.failure(error))
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}
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}
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}
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func retrieveEntries(feedID: String, completion: @escaping (Result<([FeedbinEntry]?, String?), Error>) -> Void) {
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let since = Calendar.current.date(byAdding: .month, value: -3, to: Date()) ?? Date()
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let sinceString = FeedbinDate.formatter.string(from: since)
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var callComponents = URLComponents(url: feedbinBaseURL.appendingPathComponent("feeds/\(feedID)/entries.json"), resolvingAgainstBaseURL: false)!
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callComponents.queryItems = [URLQueryItem(name: "since", value: sinceString), URLQueryItem(name: "per_page", value: "100"), URLQueryItem(name: "mode", value: "extended")]
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let request = URLRequest(url: callComponents.url!, credentials: credentials)
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transport.send(request: request, resultType: [FeedbinEntry].self) { result in
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switch result {
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case .success(let (response, entries)):
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let pagingInfo = HTTPLinkPagingInfo(urlResponse: response)
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completion(.success((entries, pagingInfo.nextPage)))
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case .failure(let error):
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completion(.failure(error))
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}
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}
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}
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func retrieveEntries(completion: @escaping (Result<([FeedbinEntry]?, String?, Int?), Error>) -> Void) {
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let since: Date = {
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if let lastArticleFetch = accountMetadata?.lastArticleFetch {
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return lastArticleFetch
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} else {
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return Calendar.current.date(byAdding: .month, value: -3, to: Date()) ?? Date()
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}
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}()
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let sinceString = FeedbinDate.formatter.string(from: since)
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var callComponents = URLComponents(url: feedbinBaseURL.appendingPathComponent("entries.json"), resolvingAgainstBaseURL: false)!
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callComponents.queryItems = [URLQueryItem(name: "since", value: sinceString), URLQueryItem(name: "per_page", value: "100"), URLQueryItem(name: "mode", value: "extended")]
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let request = URLRequest(url: callComponents.url!, credentials: credentials)
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transport.send(request: request, resultType: [FeedbinEntry].self) { result in
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switch result {
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case .success(let (response, entries)):
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let dateInfo = HTTPDateInfo(urlResponse: response)
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self.accountMetadata?.lastArticleFetch = dateInfo?.date
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let pagingInfo = HTTPLinkPagingInfo(urlResponse: response)
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let lastPageNumber = self.extractPageNumber(link: pagingInfo.lastPage)
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completion(.success((entries, pagingInfo.nextPage, lastPageNumber)))
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case .failure(let error):
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self.accountMetadata?.lastArticleFetch = nil
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completion(.failure(error))
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}
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}
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}
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func retrieveEntries(page: String, completion: @escaping (Result<([FeedbinEntry]?, String?), Error>) -> Void) {
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guard let url = URL(string: page) else {
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completion(.success((nil, nil)))
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return
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}
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let request = URLRequest(url: url, credentials: credentials)
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transport.send(request: request, resultType: [FeedbinEntry].self) { result in
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switch result {
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case .success(let (response, entries)):
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let pagingInfo = HTTPLinkPagingInfo(urlResponse: response)
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completion(.success((entries, pagingInfo.nextPage)))
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case .failure(let error):
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self.accountMetadata?.lastArticleFetch = nil
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completion(.failure(error))
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}
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}
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}
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func retrieveUnreadEntries(completion: @escaping (Result<[Int]?, Error>) -> Void) {
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let callURL = feedbinBaseURL.appendingPathComponent("unread_entries.json")
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let conditionalGet = accountMetadata?.conditionalGetInfo[ConditionalGetKeys.unreadEntries]
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let request = URLRequest(url: callURL, credentials: credentials, conditionalGet: conditionalGet)
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transport.send(request: request, resultType: [Int].self) { result in
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switch result {
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case .success(let (response, unreadEntries)):
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self.storeConditionalGet(key: ConditionalGetKeys.unreadEntries, headers: response.allHeaderFields)
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completion(.success(unreadEntries))
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case .failure(let error):
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completion(.failure(error))
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}
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}
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}
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func createUnreadEntries(entries: [Int], completion: @escaping (Result<Void, Error>) -> Void) {
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let callURL = feedbinBaseURL.appendingPathComponent("unread_entries.json")
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let request = URLRequest(url: callURL, credentials: credentials)
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let payload = FeedbinUnreadEntry(unreadEntries: entries)
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transport.send(request: request, method: HTTPMethod.post, payload: payload, completion: completion)
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}
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func deleteUnreadEntries(entries: [Int], completion: @escaping (Result<Void, Error>) -> Void) {
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let callURL = feedbinBaseURL.appendingPathComponent("unread_entries.json")
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let request = URLRequest(url: callURL, credentials: credentials)
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let payload = FeedbinUnreadEntry(unreadEntries: entries)
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transport.send(request: request, method: HTTPMethod.delete, payload: payload, completion: completion)
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}
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func retrieveStarredEntries(completion: @escaping (Result<[Int]?, Error>) -> Void) {
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let callURL = feedbinBaseURL.appendingPathComponent("starred_entries.json")
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let conditionalGet = accountMetadata?.conditionalGetInfo[ConditionalGetKeys.starredEntries]
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let request = URLRequest(url: callURL, credentials: credentials, conditionalGet: conditionalGet)
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transport.send(request: request, resultType: [Int].self) { result in
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switch result {
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case .success(let (response, starredEntries)):
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self.storeConditionalGet(key: ConditionalGetKeys.starredEntries, headers: response.allHeaderFields)
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completion(.success(starredEntries))
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case .failure(let error):
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completion(.failure(error))
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}
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}
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}
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func createStarredEntries(entries: [Int], completion: @escaping (Result<Void, Error>) -> Void) {
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let callURL = feedbinBaseURL.appendingPathComponent("starred_entries.json")
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let request = URLRequest(url: callURL, credentials: credentials)
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let payload = FeedbinStarredEntry(starredEntries: entries)
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transport.send(request: request, method: HTTPMethod.post, payload: payload, completion: completion)
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}
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func deleteStarredEntries(entries: [Int], completion: @escaping (Result<Void, Error>) -> Void) {
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let callURL = feedbinBaseURL.appendingPathComponent("starred_entries.json")
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let request = URLRequest(url: callURL, credentials: credentials)
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let payload = FeedbinStarredEntry(starredEntries: entries)
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transport.send(request: request, method: HTTPMethod.delete, payload: payload, completion: completion)
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}
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}
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// MARK: Private
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extension FeedbinAPICaller {
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func storeConditionalGet(key: String, headers: [AnyHashable : Any]) {
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if var conditionalGet = accountMetadata?.conditionalGetInfo {
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conditionalGet[key] = HTTPConditionalGetInfo(headers: headers)
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accountMetadata?.conditionalGetInfo = conditionalGet
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}
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}
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func extractPageNumber(link: String?) -> Int? {
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guard let link = link else {
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return nil
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}
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if let lowerBound = link.range(of: "page=")?.upperBound {
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let partialLink = link[lowerBound..<link.endIndex]
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if let upperBound = partialLink.range(of: "&")?.lowerBound {
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return Int(link[lowerBound..<upperBound])
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}
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if let upperBound = partialLink.range(of: ">")?.lowerBound {
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return Int(link[lowerBound..<upperBound])
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}
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}
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return nil
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}
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}
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