redo StudyplusRecord duration property type, remove added Initializer

Author: Maika Akedo

Demo/ViewController.swift

@@ -67,7 +67,7 @@ class ViewController: UIViewController, StudyplusLoginDelegate {
         self.resultLabel.text = ""
 
         let recordAmount: StudyplusRecordAmount = StudyplusRecordAmount(amount: 10)
-        let record: StudyplusRecord = StudyplusRecord(duration: Int(duration), recordedAt: Date(), amount: recordAmount, comment: "Today, I studied like anything.")
+        let record: StudyplusRecord = StudyplusRecord(duration: duration, recordedAt: Date(), amount: recordAmount, comment: "Today, I studied like anything.")
 
         Studyplus.shared.post(studyRecord: record, success: { 
 

StudyplusSDK/Studyplus.swift

@@ -152,7 +152,7 @@ final public class Studyplus {
     ///   - failure: callback when failure to post the studyRecord
     public func post(studyRecord: StudyplusRecord, success: @escaping () -> Void, failure: @escaping (_ error: StudyplusError) -> Void) {
 
-        guard StudyplusRecord.durationRange ~= studyRecord.duration else {
+        guard StudyplusRecord.durationRange ~= Int(studyRecord.duration) else {
             failure(.postRecordFailed)
             return
         }

StudyplusSDK/StudyplusRecord.swift

@@ -76,7 +76,7 @@ public struct StudyplusRecord {
      The seconds of the learning.
      勉強した時間（秒数）です。
      */
-    public let duration: Int
+    public let duration: Double
 
     /**
      The date and time of learning.
@@ -109,28 +109,8 @@ 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。
-    @available(*, deprecated, message: "Use Int type duration initializer instead")
     public init(duration: Double, recordedAt: Date = Date(), amount: StudyplusRecordAmount? = nil, comment: String? = nil) {
 
-        self.duration = Int(duration)
-        self.recordedAt = recordedAt
-        self.amount = amount
-        self.comment = comment
-    }
-    
-    /// Initialize StudyplusRecord object.
-    ///
-    /// 勉強記録オブジェクトを作成します。
-    ///
-    /// - Parameters:
-    ///   - duration: Specify the seconds of the learning. 勉強した時間（秒数）を指定してください。
-    ///     - min: 0
-    ///     - max: 86400 (24h)
-    ///   - 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: Int, recordedAt: Date = Date(), amount: StudyplusRecordAmount? = nil, comment: String? = nil) {
-        
         self.duration = duration
         self.recordedAt = recordedAt
         self.amount = amount