forked from shadowfacts/Tusker
448 lines
18 KiB
Swift
448 lines
18 KiB
Swift
//
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// Client.swift
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// Pachyderm
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//
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// Created by Shadowfacts on 9/8/18.
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// Copyright © 2018 Shadowfacts. All rights reserved.
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//
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import Foundation
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/**
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The base Mastodon API client.
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*/
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public class Client {
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public typealias Callback<Result: Decodable> = (Response<Result>) -> Void
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let baseURL: URL
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let session: URLSession
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public var accessToken: String?
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public var appID: String?
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public var clientID: String?
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public var clientSecret: String?
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public var timeoutInterval: TimeInterval = 60
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static let decoder: JSONDecoder = {
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let decoder = JSONDecoder()
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let formatter = DateFormatter()
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formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SZ"
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formatter.timeZone = TimeZone(abbreviation: "UTC")
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formatter.locale = Locale(identifier: "en_US_POSIX")
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let iso8601 = ISO8601DateFormatter()
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decoder.dateDecodingStrategy = .custom({ (decoder) in
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let container = try decoder.singleValueContainer()
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let str = try container.decode(String.self)
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// for the next time mastodon accidentally changes date formats >.>
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if let date = formatter.date(from: str) {
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return date
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} else if let date = iso8601.date(from: str) {
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return date
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} else {
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throw DecodingError.typeMismatch(Date.self, .init(codingPath: container.codingPath, debugDescription: "unexpected date format"))
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}
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})
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return decoder
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}()
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static let encoder: JSONEncoder = {
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let encoder = JSONEncoder()
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let formatter = DateFormatter()
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formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SZ"
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formatter.timeZone = TimeZone(abbreviation: "UTC")
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formatter.locale = Locale(identifier: "en_US_POSIX")
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encoder.dateEncodingStrategy = .formatted(formatter)
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return encoder
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}()
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public init(baseURL: URL, accessToken: String? = nil, session: URLSession = .shared) {
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self.baseURL = baseURL
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self.accessToken = accessToken
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self.session = session
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}
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@discardableResult
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public func run<Result>(_ request: Request<Result>, completion: @escaping Callback<Result>) -> URLSessionTask? {
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guard let urlRequest = createURLRequest(request: request) else {
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completion(.failure(Error(request: request, type: .invalidRequest)))
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return nil
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}
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let task = session.dataTask(with: urlRequest) { data, response, error in
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if let error = error {
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completion(.failure(Error(request: request, type: .networkError(error))))
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return
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}
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guard let data = data,
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let response = response as? HTTPURLResponse else {
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completion(.failure(Error(request: request, type: .invalidResponse)))
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return
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}
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guard response.statusCode == 200 else {
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let mastodonError = try? Client.decoder.decode(MastodonError.self, from: data)
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let type: ErrorType = mastodonError.flatMap { .mastodonError($0.description) } ?? .unexpectedStatus(response.statusCode)
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completion(.failure(Error(request: request, type: type)))
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return
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}
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let result: Result
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do {
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result = try Client.decoder.decode(Result.self, from: data)
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} catch {
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completion(.failure(Error(request: request, type: .invalidModel(error))))
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return
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}
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let pagination = response.allHeaderFields["Link"].flatMap { $0 as? String }.flatMap(Pagination.init)
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completion(.success(result, pagination))
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}
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task.resume()
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return task
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}
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func createURLRequest<Result>(request: Request<Result>) -> URLRequest? {
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guard var components = URLComponents(url: baseURL, resolvingAgainstBaseURL: true) else { return nil }
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components.path = request.endpoint.path
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components.queryItems = request.queryParameters.isEmpty ? nil : request.queryParameters.queryItems
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guard let url = components.url else { return nil }
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var urlRequest = URLRequest(url: url, timeoutInterval: timeoutInterval)
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urlRequest.httpMethod = request.method.name
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urlRequest.httpBody = request.body.data
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if let mimeType = request.body.mimeType {
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urlRequest.setValue(mimeType, forHTTPHeaderField: "Content-Type")
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}
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if let accessToken = accessToken {
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urlRequest.setValue("Bearer \(accessToken)", forHTTPHeaderField: "Authorization")
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}
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return urlRequest
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}
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// MARK: - Authorization
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public func registerApp(name: String, redirectURI: String, scopes: [Scope], website: URL? = nil, completion: @escaping Callback<RegisteredApplication>) {
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let request = Request<RegisteredApplication>(method: .post, path: "/api/v1/apps", body: ParametersBody([
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"client_name" => name,
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"redirect_uris" => redirectURI,
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"scopes" => scopes.scopeString,
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"website" => website?.absoluteString
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]))
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run(request) { result in
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defer { completion(result) }
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guard case let .success(application, _) = result else { return }
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self.appID = application.id
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self.clientID = application.clientID
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self.clientSecret = application.clientSecret
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}
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}
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public func getAccessToken(authorizationCode: String, redirectURI: String, completion: @escaping Callback<LoginSettings>) {
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let request = Request<LoginSettings>(method: .post, path: "/oauth/token", body: ParametersBody([
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"client_id" => clientID,
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"client_secret" => clientSecret,
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"grant_type" => "authorization_code",
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"code" => authorizationCode,
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"redirect_uri" => redirectURI
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]))
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run(request) { result in
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defer { completion(result) }
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guard case let .success(loginSettings, _) = result else { return }
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self.accessToken = loginSettings.accessToken
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}
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}
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public func nodeInfo(completion: @escaping Callback<NodeInfo>) {
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let wellKnown = Request<WellKnown>(method: .get, path: "/.well-known/nodeinfo")
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run(wellKnown) { result in
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switch result {
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case let .failure(error):
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completion(.failure(error))
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case let .success(wellKnown, _):
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if let url = wellKnown.links.first(where: { $0.rel == "http://nodeinfo.diaspora.software/ns/schema/2.0" }),
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let components = URLComponents(string: url.href),
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components.host == self.baseURL.host {
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let nodeInfo = Request<NodeInfo>(method: .get, path: Endpoint(stringLiteral: components.path))
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self.run(nodeInfo, completion: completion)
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}
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}
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}
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}
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// MARK: - Self
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public static func getSelfAccount() -> Request<Account> {
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return Request<Account>(method: .get, path: "/api/v1/accounts/verify_credentials")
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}
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public static func getFavourites() -> Request<[Status]> {
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return Request<[Status]>(method: .get, path: "/api/v1/favourites")
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}
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public static func getRelationships(accounts: [String]? = nil) -> Request<[Relationship]> {
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return Request<[Relationship]>(method: .get, path: "/api/v1/accounts/relationships", queryParameters: "id" => accounts)
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}
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public static func getInstance() -> Request<Instance> {
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return Request<Instance>(method: .get, path: "/api/v1/instance")
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}
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public static func getCustomEmoji() -> Request<[Emoji]> {
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return Request<[Emoji]>(method: .get, path: "/api/v1/custom_emojis")
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}
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// MARK: - Accounts
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public static func getAccount(id: String) -> Request<Account> {
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return Request<Account>(method: .get, path: "/api/v1/accounts/\(id)")
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}
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public static func searchForAccount(query: String, limit: Int? = nil, following: Bool? = nil) -> Request<[Account]> {
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return Request<[Account]>(method: .get, path: "/api/v1/accounts/search", queryParameters: [
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"q" => query,
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"limit" => limit,
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"following" => following
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])
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}
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// MARK: - Blocks
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public static func getBlocks() -> Request<[Account]> {
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return Request<[Account]>(method: .get, path: "/api/v1/blocks")
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}
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public static func getDomainBlocks() -> Request<[String]> {
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return Request<[String]>(method: .get, path: "api/v1/domain_blocks")
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}
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public static func block(domain: String) -> Request<Empty> {
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return Request<Empty>(method: .post, path: "/api/v1/domain_blocks", body: ParametersBody([
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"domain" => domain
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]))
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}
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public static func unblock(domain: String) -> Request<Empty> {
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return Request<Empty>(method: .delete, path: "/api/v1/domain_blocks", body: ParametersBody([
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"domain" => domain
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]))
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}
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// MARK: - Filters
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public static func getFilters() -> Request<[Filter]> {
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return Request<[Filter]>(method: .get, path: "/api/v1/filters")
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}
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public static func createFilter(phrase: String, context: [Filter.Context], irreversible: Bool? = nil, wholeWord: Bool? = nil, expiresAt: Date? = nil) -> Request<Filter> {
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return Request<Filter>(method: .post, path: "/api/v1/filters", body: ParametersBody([
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"phrase" => phrase,
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"irreversible" => irreversible,
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"whole_word" => wholeWord,
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"expires_at" => expiresAt
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] + "context" => context.contextStrings))
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}
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public static func getFilter(id: String) -> Request<Filter> {
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return Request<Filter>(method: .get, path: "/api/v1/filters/\(id)")
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}
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// MARK: - Follows
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public static func getFollowRequests(range: RequestRange = .default) -> Request<[Account]> {
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var request = Request<[Account]>(method: .get, path: "/api/v1/follow_requests")
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request.range = range
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return request
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}
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public static func getFollowSuggestions() -> Request<[Account]> {
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return Request<[Account]>(method: .get, path: "/api/v1/suggestions")
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}
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public static func followRemote(acct: String) -> Request<Account> {
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return Request<Account>(method: .post, path: "/api/v1/follows", body: ParametersBody(["uri" => acct]))
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}
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// MARK: - Lists
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public static func getLists() -> Request<[List]> {
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return Request<[List]>(method: .get, path: "/api/v1/lists")
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}
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public static func getList(id: String) -> Request<List> {
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return Request<List>(method: .get, path: "/api/v1/lists/\(id)")
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}
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public static func createList(title: String) -> Request<List> {
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return Request<List>(method: .post, path: "/api/v1/lists", body: ParametersBody(["title" => title]))
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}
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// MARK: - Media
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public static func upload(attachment: FormAttachment, description: String? = nil, focus: (Float, Float)? = nil) -> Request<Attachment> {
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return Request<Attachment>(method: .post, path: "/api/v1/media", body: FormDataBody([
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"description" => description,
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"focus" => focus
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], attachment))
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}
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// MARK: - Mutes
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public static func getMutes(range: RequestRange) -> Request<[Account]> {
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var request = Request<[Account]>(method: .get, path: "/api/v1/mutes")
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request.range = range
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return request
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}
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// MARK: - Notifications
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public static func getNotifications(excludeTypes: [Notification.Kind], range: RequestRange = .default) -> Request<[Notification]> {
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var request = Request<[Notification]>(method: .get, path: "/api/v1/notifications", queryParameters:
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"exclude_types" => excludeTypes.map { $0.rawValue }
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)
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request.range = range
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return request
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}
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public static func clearNotifications() -> Request<Empty> {
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return Request<Empty>(method: .post, path: "/api/v1/notifications/clear")
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}
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// MARK: - Reports
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public static func getReports() -> Request<[Report]> {
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return Request<[Report]>(method: .get, path: "/api/v1/reports")
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}
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public static func report(account: Account, statuses: [Status], comment: String) -> Request<Report> {
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return Request<Report>(method: .post, path: "/api/v1/reports", body: ParametersBody([
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"account_id" => account.id,
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"comment" => comment
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] + "status_ids" => statuses.map { $0.id }))
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}
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// MARK: - Search
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public static func search(query: String, types: [SearchResultType]? = nil, resolve: Bool? = nil, limit: Int? = nil) -> Request<SearchResults> {
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return Request<SearchResults>(method: .get, path: "/api/v2/search", queryParameters: [
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"q" => query,
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"resolve" => resolve,
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"limit" => limit,
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] + "types" => types?.map { $0.rawValue })
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}
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// MARK: - Statuses
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public static func getStatus(id: String) -> Request<Status> {
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return Request<Status>(method: .get, path: "/api/v1/statuses/\(id)")
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}
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public static func createStatus(text: String,
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contentType: StatusContentType = .plain,
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inReplyTo: String? = nil,
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media: [Attachment]? = nil,
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sensitive: Bool? = nil,
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spoilerText: String? = nil,
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visibility: Status.Visibility? = nil,
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language: String? = nil,
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pollOptions: [String]? = nil,
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pollExpiresIn: Int? = nil,
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pollMultiple: Bool? = nil,
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localOnly: Bool? = nil /* hometown only, not glitch */) -> Request<Status> {
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return Request<Status>(method: .post, path: "/api/v1/statuses", body: ParametersBody([
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"status" => text,
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"content_type" => contentType.mimeType,
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"in_reply_to_id" => inReplyTo,
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"sensitive" => sensitive,
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"spoiler_text" => spoilerText,
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"visibility" => visibility?.rawValue,
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"language" => language,
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"poll[expires_in]" => pollExpiresIn,
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"poll[multiple]" => pollMultiple,
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"local_only" => localOnly,
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] + "media_ids" => media?.map { $0.id } + "poll[options]" => pollOptions))
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}
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// MARK: - Timelines
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public static func getStatuses(timeline: Timeline, range: RequestRange = .default) -> Request<[Status]> {
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return timeline.request(range: range)
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}
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// MARK: - Bookmarks
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public static func getBookmarks(range: RequestRange = .default) -> Request<[Status]> {
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var request = Request<[Status]>(method: .get, path: "/api/v1/bookmarks")
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request.range = range
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return request
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}
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// MARK: - Instance
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public static func getTrendingHashtags(limit: Int? = nil) -> Request<[Hashtag]> {
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let parameters: [Parameter]
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if let limit = limit {
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parameters = ["limit" => limit]
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} else {
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parameters = []
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}
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return Request<[Hashtag]>(method: .get, path: "/api/v1/trends", queryParameters: parameters)
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}
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public static func getTrendingStatuses(limit: Int? = nil) -> Request<[Status]> {
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let parameters: [Parameter]
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if let limit = limit {
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parameters = ["limit" => limit]
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} else {
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parameters = []
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}
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return Request(method: .get, path: "/api/v1/trends/statuses", queryParameters: parameters)
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}
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public static func getFeaturedProfiles(local: Bool, order: DirectoryOrder, offset: Int? = nil, limit: Int? = nil) -> Request<[Account]> {
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var parameters = [
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"order" => order.rawValue,
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"local" => local,
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]
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if let offset = offset {
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parameters.append("offset" => offset)
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}
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if let limit = limit {
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parameters.append("limit" => limit)
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}
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return Request<[Account]>(method: .get, path: "/api/v1/directory", queryParameters: parameters)
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}
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}
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extension Client {
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public struct Error: LocalizedError {
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public let requestMethod: Method
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public let requestEndpoint: Endpoint
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public let type: ErrorType
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init<ResultType: Decodable>(request: Request<ResultType>, type: ErrorType) {
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self.requestMethod = request.method
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self.requestEndpoint = request.endpoint
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self.type = type
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}
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public var localizedDescription: String {
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switch type {
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case .networkError(let error):
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return "Network Error: \(error.localizedDescription)"
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// todo: support more status codes
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case .unexpectedStatus(413):
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return "HTTP 413: Payload Too Large"
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case .unexpectedStatus(let code):
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return "HTTP Code \(code)"
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case .invalidRequest:
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return "Invalid Request"
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case .invalidResponse:
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return "Invalid Response"
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case .invalidModel(_):
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return "Invalid Model"
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case .mastodonError(let error):
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return "Server Error: \(error)"
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}
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}
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}
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public enum ErrorType: LocalizedError {
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case networkError(Swift.Error)
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case unexpectedStatus(Int)
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case invalidRequest
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case invalidResponse
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case invalidModel(Swift.Error)
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case mastodonError(String)
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}
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}
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