public ActionResult Notify()
{
傳送訊息DemoControl control = new 傳送訊息DemoControl(); // new a control object.
NotifyType notifytype; // declare enumernation type reference.
SenderType sendertype;
Message message = new Message(); // Data Transfer Object.
// 判斷選擇哪一種通知類型
if (Request.Form["NotifyType"].Equals("SystemNotify"))
notifytype = NotifyType.System;
else
notifytype = NotifyType.User;
// 判斷選擇哪一種傳送方式
if (Request.Form["SenderType"].Equals("EmailSender"))
sendertype = SenderType.Email;
else
sendertype = SenderType.Line;
// 組裝 Message 物件的內容
message.Recipient = Request.Form["txtRecipient"];
message.Subject = Request.Form["txtSubject"];
message.Body = Request.Form["txtBody"];
// 交由 control 委派處理
string procResult = control.Notify(notifytype, sendertype, message);
ViewData["result"] = procResult;
return View();
}
/// <summary>
/// 處理傳遞訊息的控制邏輯
/// </summary>
/// <param name="notifytype">enum: System, User</param>
/// <param name="sendertype">enum: Email, Line</param>
/// <param name="message">訊息物件</param>
/// <returns></returns>
public string Notify(NotifyType notifytype, SenderType sendertype, Message message)
{
string procResult = "";
// 判斷需產出哪一個 RefinedAbstraction 的子類別物件
switch (notifytype)
{
case NotifyType.System :
notifier = new SystemNotifier();
break;
case NotifyType.User :
notifier = new UserNotifier();
break;
}
// 判斷需哪個實作 MessageSender 介面的實作物件來服務
// 實務上會設計如 List or Hastable 集合儲存這些實作物件，並透過 Key 來取得相對應的實作物件
switch (sendertype)
{
case SenderType.Email :
notifier.sender = mailSender;
break;
case SenderType.Line :
notifier.sender = lineSender;
break;
}
// 回傳執行結果，藉此觀察使用哪一個 Notifier 子類別物件與 MessengSender 物件
procResult = notifier.Notify(message);
return procResult;
}
// 實務上，需實作呼叫 Line 系統的 API
// 將訊息傳入至 Line 系統
public string SendMessage(Message msg)
{
string result;
result = "交由 Line Sender 傳送：\n\n"
+ "收件人：" + msg.Recipient + "\n"
+ "主旨 ：" + msg.Subject + "\n"
+ "內容 ：" + msg.Body;
return result;
}
/// <summary>
/// 實現 Notify 處理的程序
/// </summary>
/// <param name="message">Message 物件</param>
/// <returns>處理結果</returns>
public override string Notify(Message message)
{
string procResult; // 處理結果
// 1. 將訊息傳送給所指定的收件人
procResult = sender.SendMessage(message);
return procResult;
}
/// <summary>
/// 實現 Notify 處理的程序
/// </summary>
/// <param name="message">Message 物件</param>
/// <returns>處理結果</returns>
public override string Notify(Message message)
{
string procResult; // 處理結果
// 1. 寫入到 System Event Log
procResult = "程序：訊息內容寫入到 System Event Log\n\n";
// 2.1 將訊息內容編碼
procResult = procResult + "執行編碼程序：\n";
message.Body = sender.編碼(message.Body);
// 2.2 將訊息傳送給所指定的收件人
procResult = procResult + sender.SendMessage(message);
return procResult;
}
// 定義為抽象方法，交由子類別來實作 public abstract string Notify(Message message);