Fix SwiftLint warning and error

Author: koji-1009

Lib/StudyplusSDK/Studyplus.swift

@@ -95,10 +95,10 @@ final public class Studyplus {
     /// Studyplusアプリとの連携を解除します。
     public func logout() {
 
-        let k = keychain()
+        let chain = keychain()
         do {
-            try k.remove(usernameStoreKey)
-            try k.remove(accessTokenStoreKey)
+            try chain.remove(usernameStoreKey)
+            try chain.remove(accessTokenStoreKey)
         } catch {
         }
     }
@@ -178,16 +178,23 @@ final public class Studyplus {
         })
     }
 
-    /// It is responsible for processing custom URL scheme when it came back from the authorization / login screen of Stuudyplus app.
+    /// It is responsible for processing custom URL scheme
+    /// when it came back from the authorization / login screen of Stuudyplus app.
     /// After handling openURL method in AppDelegate, pass the url parameter to this method.
     /// If the URL is passed by Studyplus application, calls the callback method of the delegate object.
     ///
     /// Studyplusアプリの認可・ログイン画面から戻ってきた時のカスタムURLスキーム処理を担当します。
     /// AppDelegateでopenURLをハンドリングしてから、このメソッドにurlを渡して委譲してください。
     /// Studyplusアプリ関連のURLであれば、delegateオブジェクトのコールバックメソッドを呼び出します。
     ///
-    /// - Parameter appDelegateUrl: The parameter of AppDelegate#openURL method. AppDelegate#openURLメソッドで受け取ったurlパラメータをそのまま渡して下さい。
-    /// - Returns: If the url is supported by StudyplusSDK, returns true. The valid URL has a __[studyplus-{consumerKey}]__ scheme, and right pathComponents and host. 渡されたurlがStudyplusSDKで対応すべきURL（スキームが __[studyplus-{consumerKey}]__ であり、host/pathComponentsが想定内であるもの）であれば true、それ以外は false を返します。
+    /// - Parameter appDelegateUrl:
+    ///     The parameter of AppDelegate#openURL method.
+    ///     AppDelegate#openURLメソッドで受け取ったurlパラメータをそのまま渡して下さい。
+    /// - Returns:
+    ///     If the url is supported by StudyplusSDK, returns true.
+    ///     The valid URL has a __[studyplus-{consumerKey}]__ scheme, and right pathComponents and host.
+    ///     渡されたurlがStudyplusSDKで対応すべきURLであれば true、それ以外は false を返します。
+    ///     __[studyplus-{consumerKey}]__と正しいpathComponentsを持つことを確認してください。
     public func handle(appDelegateUrl: URL) -> Bool {
 
         guard isAcceptableURL(url: appDelegateUrl) else {
@@ -201,10 +208,10 @@ final public class Studyplus {
             let accessToken: String = appDelegateUrl.pathComponents[2].trimmingCharacters(in: .whitespacesAndNewlines)
             let username: String = appDelegateUrl.pathComponents[3].trimmingCharacters(in: .whitespacesAndNewlines)
 
-            let k = keychain()
+            let chain = keychain()
             do {
-                try k.set(accessToken, key: accessTokenStoreKey)
-                try k.set(username, key: usernameStoreKey)
+                try chain.set(accessToken, key: accessTokenStoreKey)
+                try chain.set(username, key: usernameStoreKey)
                 delegate?.studyplusDidSuccessToLogin()
             } catch {
                 delegate?.studyplusDidFailToLogin(error: .unknownReason("Could not access Keychain."))
@@ -233,7 +240,8 @@ final public class Studyplus {
     }
 
     /// Change the consumer key and secret.
-    /// Calling this method allows you to switch to another consumer key and secret. For example, you log in to Studyplus, log out, and post a study record.
+    /// Calling this method allows you to switch to another consumer key and secret.
+    /// For example, you log in to Studyplus, log out, and post a study record.
     /// If multiple applications are connected with Studyplus, you need to call this method.
     /// If there is only one connected application, you do not need to call this method.
     /// If multiple applications are connected with Studyplus, do not forget to set up custom URL schemes.
@@ -283,7 +291,6 @@ final public class Studyplus {
     }
 
     private func keychain() -> Keychain {
-
         let serviceName: String = "Studyplus_iOS_SDK_\(consumerKey)"
         return Keychain(service: serviceName)
     }

Lib/StudyplusSDK/StudyplusAPIRequest.swift

@@ -35,7 +35,10 @@ internal struct StudyplusAPIRequest {
         self.accessToken = accessToken
     }
 
-    internal func post(path: String, params: [String: Any], success: @escaping (_ response: [AnyHashable: Any]) -> Void, failure: @escaping (_ error: StudyplusError) -> Void) {
+    internal func post(path: String,
+                       params: [String: Any],
+                       success: @escaping (_ response: [AnyHashable: Any]) -> Void,
+                       failure: @escaping (_ error: StudyplusError) -> Void) {
 
         start(path: path, method: "POST", body: params, success: { (response) in
 
@@ -57,7 +60,11 @@ internal struct StudyplusAPIRequest {
 
     // MARK: - private
 
-    private func start(path: String, method: String, body: [String: Any], success: @escaping (_ response: [AnyHashable: Any]) -> Void, failure: @escaping (_ statusCode: Int, _ response: [String: Any]?) -> Void) {
+    private func start(path: String,
+                       method: String,
+                       body: [String: Any],
+                       success: @escaping (_ response: [AnyHashable: Any]) -> Void,
+                       failure: @escaping (_ statusCode: Int, _ response: [String: Any]?) -> Void) {
 
         guard let url = buildUrl(path: path) else {
             failure(0, nil)

Lib/StudyplusSDK/StudyplusRecord.swift

@@ -27,11 +27,11 @@
 import Foundation
 
 private let formatter: DateFormatter = {
-    let f: DateFormatter = DateFormatter()
-    f.locale = Locale(identifier: "en_US_POSIX")
-    f.calendar = Calendar(identifier: .gregorian)
-    f.timeZone = NSTimeZone.system
-    return f
+    let formatter: DateFormatter = DateFormatter()
+    formatter.locale = Locale(identifier: "en_US_POSIX")
+    formatter.calendar = Calendar(identifier: .gregorian)
+    formatter.timeZone = NSTimeZone.system
+    return formatter
 }()
 
 private enum DateLocalePattern {
@@ -109,8 +109,10 @@ public struct StudyplusRecord {
     ///   - recordedAt: Time the learning is ended. 学習を終えた日時。
     ///   - amount: The amount of learning. 学習量。
     ///   - comment: Studyplus timeline comment. Studyplusのタイムライン上で表示されるコメント。
-    public init(duration: Double, recordedAt: Date = Date(), amount: StudyplusRecordAmount? = nil, comment: String? = nil) {
-
+    public init(duration: Double,
+                recordedAt: Date = Date(),
+                amount: StudyplusRecordAmount? = nil,
+                comment: String? = nil) {
         self.duration = duration
         self.recordedAt = recordedAt
         self.amount = amount