CC-2755: Displaying trial ending information

- it only displays about remaining date when the plan level is 'trial'

airtime_mvc/application/layouts/scripts/layout.phtml

@@ -10,7 +10,7 @@
 
 <div id="Panel">
     <div class="logo"></div>
-    <?php echo $this->partial('partialviews/header.phtml', array("user" => $this->loggedInAs(), "trial_remain"=> $this->trialRemaining())) ?>
+    <?php echo $this->partial('partialviews/header.phtml', array("user" => $this->loggedInAs(), "is_trial"=>$this->isTrial(), "trial_remain"=> $this->trialRemaining())) ?>
 
 <?php 	$partial = array('menu.phtml', 'default');
 		$this->navigation()->menu()->setPartial($partial); ?>

airtime_mvc/application/layouts/scripts/library.phtml

@@ -10,7 +10,7 @@
 
 <div id="Panel">
     <div class="logo"></div>
-    <?php echo $this->partial('partialviews/header.phtml', array("user" => $this->loggedInAs(), "trial_remain"=> $this->trialRemaining())) ?>
+    <?php echo $this->partial('partialviews/header.phtml', array("user" => $this->loggedInAs(), "is_trial"=>$this->isTrial(), "trial_remain"=> $this->trialRemaining())) ?>
 
 <?php 	$partial = array('menu.phtml', 'default');
 		$this->navigation()->menu()->setPartial($partial); ?>

airtime_mvc/application/views/helpers/IsTrial.php

@@ -0,0 +1,12 @@
+<?php
+
+class Airtime_View_Helper_IsTrial extends Zend_View_Helper_Abstract{
+    public function isTrial(){
+        $plan = Application_Model_Preference::GetPlanLevel();
+        if($plan == 'trial'){
+            return true;
+        }else{
+            return false;
+        }
+    }
+}

airtime_mvc/application/views/helpers/TrialRemaining.php

@@ -0,0 +1,16 @@
+<?php
+
+class Airtime_View_Helper_TrialRemaining extends Zend_View_Helper_Abstract
+{
+    public function trialRemaining()
+    {
+        $ending_date = Application_Model_Preference::GetTrialEndingDate();
+        $datetime1 = new DateTime();
+        $datetime2 = new DateTime($ending_date);
+        $interval = $datetime1->diff($datetime2);
+        if($interval->format('%R') == '-'){
+            return "Trial expired.";
+        }
+        return $interval->format('%a days');
+    }
+}

airtime_mvc/application/views/scripts/partialviews/header.phtml

@@ -30,12 +30,14 @@
       <li class="time-zone"><span id="time-zone"></span></li>
     </ul>
   </div>
+  <?php if($this->is_trial){?>
   <div class="trial-info-block">
     <ul>
       <li>Trial remaining</li>
       <li><?php echo $this->trial_remain?></li>
     </ul>
   </div>
+  <?php }?>
   <div class="personal-block">
     <ul>
       <li><a id="about-link" href="#">About</a></li>