From 0b01c52d980445e2ed0a6e5a17f96d6872f6c77f Mon Sep 17 00:00:00 2001
From: Kijin Sung <kijin@kijinsung.com>
Date: Fri, 4 Nov 2016 14:40:17 +0900
Subject: [PATCH] Implement delayed sending of SMS

---
 common/framework/drivers/sms/coolsms.php | 11 ++++++-
 common/framework/sms.php                 | 38 ++++++++++++++++++++++++
 2 files changed, 48 insertions(+), 1 deletion(-)

diff --git a/common/framework/drivers/sms/coolsms.php b/common/framework/drivers/sms/coolsms.php
index 6dd7442e0..4b289ffc1 100644
--- a/common/framework/drivers/sms/coolsms.php
+++ b/common/framework/drivers/sms/coolsms.php
@@ -67,9 +67,18 @@ class CoolSMS extends Base implements \Rhymix\Framework\Drivers\SMSInterface
 					$options->from = $message->getFrom();
 					$options->to = $recipient_number;
 					$options->charset = 'utf8';
-					$content_full = $message->getContent();
+					
+					// Determine when to send this message.
+					if ($datetime = $message->getDelay())
+					{
+						if ($datetime > time())
+						{
+							$options->datetime = gmdate('YmdHis', $datetime + (3600 * 9));
+						}
+					}
 					
 					// Determine the message type based on the length.
+					$content_full = $message->getContent();
 					$detected_type = $message->checkLength($content_full, $this->_maxlength_sms) ? 'SMS' : 'LMS';
 					$options->type = $detected_type;
 					
diff --git a/common/framework/sms.php b/common/framework/sms.php
index 1396946d1..26ae2b8e0 100644
--- a/common/framework/sms.php
+++ b/common/framework/sms.php
@@ -17,6 +17,7 @@ class SMS
 	protected $subject = '';
 	protected $content = '';
 	protected $attachments = array();
+	protected $delay_timestamp = 0;
 	protected $force_sms = false;
 	protected $allow_split_sms = true;
 	protected $allow_split_lms = true;
@@ -313,6 +314,43 @@ class SMS
 		return $this->attachments;
 	}
 	
+	/**
+	 * Delay sending the message.
+	 * 
+	 * Delays (in seconds) less than 1 year will be treated as relative to the
+	 * current time. Greater values will be interpreted as a Unix timestamp.
+	 * 
+	 * This feature may not be implemented by all drivers.
+	 * 
+	 * @param int $when Unix timestamp
+	 * @return bool
+	 */
+	public function setDelay($when)
+	{
+		if ($when <= (86400 * 365))
+		{
+			$when = time() + $when;
+		}
+		
+		$this->delay_timestamp = intval($when);
+		return true;
+	}
+	
+	/**
+	 * Get the Unix timestamp of when to send the message.
+	 * 
+	 * This method always returns a Unix timestamp, even if the original value
+	 * was given as a relative delay.
+	 * 
+	 * This feature may not be implemented by all drivers.
+	 * 
+	 * @return int
+	 */
+	public function getDelay()
+	{
+		return $this->delay_timestamp;
+	}
+	
 	/**
 	 * Force this message to use SMS (not LMS or MMS).
 	 *