CC-2436: Save pulldown settings

For week and day views under Calendar page, save the change to pref db table when
user updates the interval dropdown. Same thing goes for the "show XXX entries"
dropdown found under Playlist Builder page.

When visiting these pages, we retrieves the entry from database for current user
and use those values. Defaults to 30m for interval and 10 entries for "show xxx entries"
if values were never set.

airtime_mvc/application/controllers/ApiController.php

@@ -25,6 +25,7 @@ class ApiController extends Zend_Controller_Action
                 ->addActionContext('register-component', 'json')
                 ->addActionContext('update-liquidsoap-error', 'json')
                 ->addActionContext('update-liquidsoap-connection', 'json')
+                ->addActionContext('library-init', 'json')
                 ->initContext();
     }
 
@@ -77,9 +78,10 @@ class ApiController extends Zend_Controller_Action
         }
         
     	$this->view->calendarInit = array(
-        	"timestamp"=>time(), 
-        	"timezoneOffset"=> date("Z"), 
-        	"timeScale"=>Application_Model_Preference::GetCalendarTimeScale()
+        	"timestamp" => time(), 
+        	"timezoneOffset" => date("Z"), 
+        	"timeScale" => Application_Model_Preference::GetCalendarTimeScale(),
+    		"timeInterval" => Application_Model_Preference::GetCalendarTimeInterval()
         );
     	
     }
@@ -731,5 +733,25 @@ class ApiController extends Zend_Controller_Action
         // setting error_msg as "" when there is no error_msg
         Application_Model_StreamSetting::setLiquidsoapError($stream_id, "");
     }
+    
+    /**
+     * Sets up and send init values used in the Library.
+     * This is being used by library.js
+     */
+    public function libraryInitAction(){
+    	$this->view->layout()->disableLayout();
+        $this->_helper->viewRenderer->setNoRender(true);
+        
+        if(is_null(Zend_Auth::getInstance()->getStorage()->read())) {
+            header('HTTP/1.0 401 Unauthorized');
+            print 'You are not allowed to access this resource.';
+            return;
+        }
+        
+    	$this->view->libraryInit = array(
+        	"numEntries"=>Application_Model_Preference::GetLibraryNumEntries()
+        );
+    	
+    }
 }