Support JSON request bodies

Pachyderm/Client.swift

@@ -26,7 +26,7 @@ public class Client {
     
     public var timeoutInterval: TimeInterval = 60
     
-    lazy var decoder: JSONDecoder = {
+    static let decoder: JSONDecoder = {
         let decoder = JSONDecoder()
         let formatter = DateFormatter()
         formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SZ"
@@ -36,6 +36,16 @@ public class Client {
         return decoder
     }()
     
+    static let encoder: JSONEncoder = {
+        let encoder = JSONEncoder()
+        let formatter = DateFormatter()
+        formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SZ"
+        formatter.timeZone = TimeZone(abbreviation: "UTC")
+        formatter.locale = Locale(identifier: "en_US_POSIX")
+        encoder.dateEncodingStrategy = .formatted(formatter)
+        return encoder
+    }()
+    
     public init(baseURL: URL, accessToken: String? = nil, session: URLSession = .shared) {
         self.baseURL = baseURL
         self.accessToken = accessToken
@@ -59,12 +69,12 @@ public class Client {
                     return
             }
             guard response.statusCode == 200 else {
-                let mastodonError = try? self.decoder.decode(MastodonError.self, from: data)
+                let mastodonError = try? Client.decoder.decode(MastodonError.self, from: data)
                 let error: Error = mastodonError.flatMap { .mastodonError($0.description) } ?? .unexpectedStatus(response.statusCode)
                 completion(.failure(error))
                 return
             }
-            guard let result = try? self.decoder.decode(Result.self, from: data) else {
+            guard let result = try? Client.decoder.decode(Result.self, from: data) else {
                 completion(.failure(.invalidModel))
                 return
             }
@@ -92,7 +102,7 @@ public class Client {
     
     // MARK: - Authorization
     public func registerApp(name: String, redirectURI: String, scopes: [Scope], website: URL? = nil, completion: @escaping Callback<RegisteredApplication>) {
-        let request = Request<RegisteredApplication>(method: .post, path: "/api/v1/apps", body: .parameters([
+        let request = Request<RegisteredApplication>(method: .post, path: "/api/v1/apps", body: ParametersBody([
                 "client_name" => name,
                 "redirect_uris" => redirectURI,
                 "scopes" => scopes.scopeString,
@@ -109,7 +119,7 @@ public class Client {
     }
     
     public func getAccessToken(authorizationCode: String, redirectURI: String, completion: @escaping Callback<LoginSettings>) {
-        let request = Request<LoginSettings>(method: .post, path: "/oauth/token", body: .parameters([
+        let request = Request<LoginSettings>(method: .post, path: "/oauth/token", body: ParametersBody([
                 "client_id" => clientID,
                 "client_secret" => clientSecret,
                 "grant_type" => "authorization_code",
@@ -168,13 +178,13 @@ public class Client {
     }
     
     public static func block(domain: String) -> Request<Empty> {
-        return Request<Empty>(method: .post, path: "/api/v1/domain_blocks", body: .parameters([
+        return Request<Empty>(method: .post, path: "/api/v1/domain_blocks", body: ParametersBody([
                 "domain" => domain
             ]))
     }
     
     public static func unblock(domain: String) -> Request<Empty> {
-        return Request<Empty>(method: .delete, path: "/api/v1/domain_blocks", body: .parameters([
+        return Request<Empty>(method: .delete, path: "/api/v1/domain_blocks", body: ParametersBody([
                 "domain" => domain
             ]))
     }
@@ -185,7 +195,7 @@ public class Client {
     }
     
     public static func createFilter(phrase: String, context: [Filter.Context], irreversible: Bool? = nil, wholeWord: Bool? = nil, expiresAt: Date? = nil) -> Request<Filter> {
-        return Request<Filter>(method: .post, path: "/api/v1/filters", body: .parameters([
+        return Request<Filter>(method: .post, path: "/api/v1/filters", body: ParametersBody([
                 "phrase" => phrase,
                 "irreversible" => irreversible,
                 "whole_word" => wholeWord,
@@ -209,7 +219,7 @@ public class Client {
     }
     
     public static func followRemote(acct: String) -> Request<Account> {
-        return Request<Account>(method: .post, path: "/api/v1/follows", body: .parameters(["uri" => acct]))
+        return Request<Account>(method: .post, path: "/api/v1/follows", body: ParametersBody(["uri" => acct]))
     }
     
     // MARK: - Lists
@@ -222,12 +232,12 @@ public class Client {
     }
     
     public static func createList(title: String) -> Request<List> {
-        return Request<List>(method: .post, path: "/api/v1/lists", body: .parameters(["title" => title]))
+        return Request<List>(method: .post, path: "/api/v1/lists", body: ParametersBody(["title" => title]))
     }
     
     // MARK: - Media
     public static func upload(attachment: FormAttachment, description: String? = nil, focus: (Float, Float)? = nil) -> Request<Attachment> {
-        return Request<Attachment>(method: .post, path: "/api/v1/media", body: .formData([
+        return Request<Attachment>(method: .post, path: "/api/v1/media", body: FormDataBody([
                 "description" => description,
                 "focus" => focus
             ], attachment))
@@ -259,7 +269,7 @@ public class Client {
     }
     
     public static func report(account: Account, statuses: [Status], comment: String) -> Request<Report> {
-        return Request<Report>(method: .post, path: "/api/v1/reports", body: .parameters([
+        return Request<Report>(method: .post, path: "/api/v1/reports", body: ParametersBody([
                 "account_id" => account.id,
                 "comment" => comment
             ] + "status_ids" => statuses.map { $0.id }))
@@ -287,7 +297,7 @@ public class Client {
                                     spoilerText: String? = nil,
                                     visibility: Status.Visibility? = nil,
                                     language: String? = nil) -> Request<Status> {
-        return Request<Status>(method: .post, path: "/api/v1/statuses", body: .parameters([
+        return Request<Status>(method: .post, path: "/api/v1/statuses", body: ParametersBody([
                 "status" => text,
                 "content_type" => contentType.mimeType,
                 "in_reply_to_id" => inReplyTo,

Pachyderm/Model/Account.swift

@@ -115,7 +115,7 @@ public final class Account: AccountProtocol, Decodable {
     }
     
     public static func mute(_ account: Account, notifications: Bool? = nil) -> Request<Relationship> {
-        return Request<Relationship>(method: .post, path: "/api/v1/accounts/\(account.id)/mute", body: .parameters([
+        return Request<Relationship>(method: .post, path: "/api/v1/accounts/\(account.id)/mute", body: ParametersBody([
                 "notifications" => notifications
             ]))
     }

Pachyderm/Model/Attachment.swift

@@ -20,7 +20,7 @@ public class Attachment: Codable {
     public let blurHash: String?
     
     public static func update(_ attachment: Attachment, focus: (Float, Float)?, description: String?) -> Request<Attachment> {
-        return Request<Attachment>(method: .put, path: "/api/v1/media/\(attachment.id)", body: .formData([
+        return Request<Attachment>(method: .put, path: "/api/v1/media/\(attachment.id)", body: FormDataBody([
                 "description" => (description ?? attachment.description),
                 "focus" => focus
             ], nil))

Pachyderm/Model/Filter.swift

@@ -23,7 +23,7 @@ public class Filter: Decodable {
     }
     
     public static func update(_ filter: Filter, phrase: String? = nil, context: [Context]? = nil, irreversible: Bool? = nil, wholeWord: Bool? = nil, expiresAt: Date? = nil) -> Request<Filter> {
-        return Request<Filter>(method: .put, path: "/api/v1/filters/\(filter.id)", body: .parameters([
+        return Request<Filter>(method: .put, path: "/api/v1/filters/\(filter.id)", body: ParametersBody([
             "phrase" => (phrase ?? filter.phrase),
             "irreversible" => (irreversible ?? filter.irreversible),
             "whole_word" => (wholeWord ?? filter.wholeWord),

Pachyderm/Model/List.swift

@@ -31,7 +31,7 @@ public class List: Decodable, Equatable, Hashable {
     }
     
     public static func update(_ list: List, title: String) -> Request<List> {
-        return Request<List>(method: .put, path: "/api/v1/lists/\(list.id)", body: .parameters(["title" => title]))
+        return Request<List>(method: .put, path: "/api/v1/lists/\(list.id)", body: ParametersBody(["title" => title]))
     }
     
     public static func delete(_ list: List) -> Request<Empty> {
@@ -39,13 +39,13 @@ public class List: Decodable, Equatable, Hashable {
     }
     
     public static func add(_ list: List, accounts accountIDs: [String]) -> Request<Empty> {
-        return Request<Empty>(method: .post, path: "/api/v1/lists/\(list.id)/accounts", body: .parameters(
+        return Request<Empty>(method: .post, path: "/api/v1/lists/\(list.id)/accounts", body: ParametersBody(
                 "account_ids" => accountIDs
             ))
     }
     
     public static func remove(_ list: List, accounts accountIDs: [String]) -> Request<Empty> {
-        return Request<Empty>(method: .delete, path: "/api/v1/lists/\(list.id)/accounts", body: .parameters(
+        return Request<Empty>(method: .delete, path: "/api/v1/lists/\(list.id)/accounts", body: ParametersBody(
                 "account_ids" => accountIDs
             ))
     }

Pachyderm/Model/Notification.swift

@@ -34,7 +34,7 @@ public class Notification: Decodable {
     }
 
     public static func dismiss(id notificationID: String) -> Request<Empty> {
-        return Request<Empty>(method: .post, path: "/api/v1/notifications/dismiss", body: .parameters([
+        return Request<Empty>(method: .post, path: "/api/v1/notifications/dismiss", body: ParametersBody([
                 "id" => notificationID
             ]))
     }

Pachyderm/Request/Body.swift

@@ -8,56 +8,82 @@
 
 import Foundation
 
-enum Body {
+protocol Body {
-    case parameters([Parameter]?)
+    var mimeType: String? { get }
-    case formData([Parameter]?, FormAttachment?)
+    var data: Data? { get }
-    case empty
 }
 
-extension Body {
+struct EmptyBody: Body {
-    private static let boundary: String = "PachydermBoundary"
+    var mimeType: String? { nil }
+    var data: Data? { nil }
+}
+
+struct ParametersBody: Body {
+    let parameters: [Parameter]?
+    
+    init(_ parmaeters: [Parameter]?) {
+        self.parameters = parmaeters
+    }
+    
+    var mimeType: String? {
+        if parameters == nil || parameters!.isEmpty {
+            return nil
+        }
+        return "application/x-www-form-urlencoded; charset=utf-8"
+    }
     
     var data: Data? {
-        switch self {
-        case let .parameters(parameters):
         return parameters?.urlEncoded.data(using: .utf8)
-        case let .formData(parameters, attachment):
+    }
+}
+
+struct FormDataBody: Body {
+    private static let boundary = "PachydermBoundary"
+    
+    let parameters: [Parameter]?
+    let attachment: FormAttachment?
+    
+    init(_ parameters: [Parameter]?, _ attachment: FormAttachment?) {
+        self.parameters = parameters
+        self.attachment = attachment
+    }
+    
+    var mimeType: String? {
+        if parameters == nil && attachment == nil {
+            return nil
+        }
+        return "multipart/form-data; boundary=\(FormDataBody.boundary)"
+    }
+    
+    var data: Data? {
         var data = Data()
         parameters?.forEach { param in
             guard let value = param.value else { return }
-                data.append("--\(Body.boundary)\r\n")
+            data.append("--\(FormDataBody.boundary)\r\n")
             data.append("Content-Disposition: form-data; name=\"\(param.name)\"\r\n\r\n")
             data.append("\(value)\r\n")
         }
         if let attachment = attachment {
-                data.append("--\(Body.boundary)\r\n")
+            data.append("--\(FormDataBody.boundary)\r\n")
             data.append("Content-Disposition: form-data; name=\"file\"; filename=\"\(attachment.fileName)\"\r\n")
             data.append("Content-Type: \(attachment.mimeType)\r\n\r\n")
             data.append(attachment.data)
             data.append("\r\n")
         }
 
-            data.append("--\(Body.boundary)--\r\n")
+        data.append("--\(FormDataBody.boundary)--\r\n")
         return data
-        case .empty:
-            return nil
-        }
-    }
-    
-    var mimeType: String? {
-        switch self {
-        case let .parameters(parameters):
-            if parameters == nil {
-                return nil
-            }
-            return "application/x-www-form-urlencoded; charset=utf-8"
-        case let .formData(parameters, attachment):
-            if parameters == nil && attachment == nil {
-                return nil
-            }
-            return "multipart/form-data; boundary=\(Body.boundary)"
-        case .empty:
-            return nil
-        }
     }
 }
+
+struct JsonBody<T: Encodable>: Body {
+    let value: T
+    
+    init(_ value: T) {
+        self.value = value
+    }
+    
+    var mimeType: String? { "application/json" }
+    
+    var data: Data? { try? Client.encoder.encode(value) }
+}

Pachyderm/Request/Request.swift

@@ -14,7 +14,7 @@ public struct Request<ResultType: Decodable> {
     let body: Body
     var queryParameters: [Parameter]
     
-    init(method: Method, path: String, body: Body = .empty, queryParameters: [Parameter] = []) {
+    init(method: Method, path: String, body: Body = EmptyBody(), queryParameters: [Parameter] = []) {
         self.method = method
         self.path = path
         self.body = body