sintonia/application/controllers/PlaylistController.php

<?php

class PlaylistController extends Zend_Controller_Action
{

    protected $pl_sess = null;

    public function init()
    {
        $ajaxContext = $this->_helper->getHelper('AjaxContext');
        $ajaxContext->addActionContext('add-item', 'json')
					->addActionContext('delete-item', 'json')
					->addActionContext('set-fade', 'json')
					->addActionContext('set-cue', 'json')
					->addActionContext('move-item', 'json')
					->addActionContext('close', 'json')
					->addActionContext('new', 'json')
					->addActionContext('metadata', 'json')
					->addActionContext('edit', 'json')
					->addActionContext('delete-active', 'json')
					->addActionContext('delete', 'json')
                    ->addActionContext('set-playlist-fades', 'json')
                    ->initContext();

        $this->pl_sess = new Zend_Session_Namespace(UI_PLAYLIST_SESSNAME);
    }

    private function getPlaylist()
    {
        $pl_sess = $this->pl_sess;
                                
		if(isset($pl_sess->id)) {

			$pl = Playlist::Recall($pl_sess->id);
			if($pl === FALSE) {
				unset($pl_sess->id);
				return;
			}
			return $pl;
        }
    }

    private function changePlaylist($pl_id)
    {
        $pl_sess = $this->pl_sess;
        
		if(isset($pl_sess->id)) {

			$pl = Playlist::Recall($pl_sess->id);
			if($pl !== FALSE) {
				$this->closePlaylist($pl);
			}
		}
	
		$userInfo = Zend_Auth::getInstance()->getStorage()->read();

		$pl = Playlist::Recall($pl_id);
		if($pl === FALSE) {
			return FALSE;
		}		
		$pl->lock($userInfo->id);
		$pl_sess->id = $pl_id;
    }

    private function closePlaylist($pl)
    {
        $userInfo = Zend_Auth::getInstance()->getStorage()->read();
        $res = $pl->unlock($userInfo->id);

		$pl_sess = $this->pl_sess;
		unset($pl_sess->id);

        return $res;
    }

    public function indexAction()
    {
        $this->view->headScript()->appendFile('/js/airtime/library/spl.js','text/javascript');
		$this->view->headLink()->appendStylesheet('/css/playlist_builder.css');

		$this->_helper->viewRenderer->setResponseSegment('spl'); 
		$this->view->pl = $this->getPlaylist();
    }

    public function newAction()
    {
        $pl_sess = $this->pl_sess;
		$userInfo = Zend_Auth::getInstance()->getStorage()->read();

        $pl = new Playlist();
        $pl_id = $pl->create("Untitled Playlist");
		$pl->setPLMetaData('dc:creator', $userInfo->login);

		$this->changePlaylist($pl_id);
		$form = new Application_Form_PlaylistMetadata();
		$this->view->fieldset = $form;
        $this->view->form = $this->view->render('playlist/new.phtml');
    }

    public function metadataAction()
    {
        $request = $this->getRequest();
        $form = new Application_Form_PlaylistMetadata();

		$pl_id = $this->_getParam('id', null);
		//not a new playlist
		if(!is_null($pl_id)) {
			$this->changePlaylist($pl_id); 
 
			$pl = $this->getPlaylist();
			$title = $pl->getPLMetaData(UI_MDATA_KEY_TITLE);
			$desc = $pl->getPLMetaData(UI_MDATA_KEY_DESCRIPTION);

			$data = array( 'title' => $title, 'description' => $desc);  
			$form->populate($data);  
		}
 
        if ($request->isPost()) {
            $title = $this->_getParam('title', null);
            $description = $this->_getParam('description', null);

			$pl = $this->getPlaylist();
            
            if($title)
			    $pl->setName($title);
			
			if(isset($description)) {
				$pl->setPLMetaData(UI_MDATA_KEY_DESCRIPTION, $description);
			}

			$this->view->pl = $pl;
			$this->view->html = $this->view->render('playlist/index.phtml');
			unset($this->view->pl);
        }
 
        $this->view->fieldset = $form;
        $this->view->form = $this->view->render('playlist/new.phtml');
    }

    public function editAction()
    {
        $pl_id = $this->_getParam('id', null);
        	
		if(!is_null($pl_id)) {
			$this->changePlaylist($pl_id);      
		}
		                      
		$pl = $this->getPlaylist();
		
		$this->view->pl = $pl;
		$this->view->html = $this->view->render('playlist/index.phtml');
		unset($this->view->pl);
    }

    public function addItemAction()
    {
        $id = $this->_getParam('id');
		$pos = $this->_getParam('pos', null);

		if (!is_null($id)) {
			
			$pl = $this->getPlaylist();
			$res = $pl->addAudioClip($id, $pos);

			if (PEAR::isError($res)) {
				$this->view->message = $res->getMessage();
			}

			$this->view->pl = $pl;
			$this->view->html = $this->view->render('playlist/update.phtml');
			$this->view->name = $pl->getName();
			$this->view->length = $pl->getLength();

			unset($this->view->pl);
			return;
		}
		$this->view->message =  "a file is not chosen";
    }

    public function moveItemAction()
    {
        $oldPos = $this->_getParam('oldPos');
		$newPos = $this->_getParam('newPos');
		
		$pl = $this->getPlaylist();

		$pl->moveAudioClip($oldPos, $newPos);

		$this->view->pl = $pl;
		$this->view->html = $this->view->render('playlist/update.phtml');
		$this->view->name = $pl->getName();
		$this->view->length = $pl->getLength();

		unset($this->view->pl);
    }

    public function deleteItemAction()
    {
        $positions = $this->_getParam('pos', array());
        		
		if (!is_array($positions))
	        $positions = array($positions);

	    //so the automatic updating of playlist positioning doesn't affect removal.
	    sort($positions);
	    $positions = array_reverse($positions);

		$pl = $this->getPlaylist();

	    foreach ($positions as $pos) {
	    	$pl->delAudioClip($pos);        
	    }

		$this->view->pl = $pl;
		$this->view->html = $this->view->render('playlist/update.phtml');
		$this->view->name = $pl->getName();
		$this->view->length = $pl->getLength();

		unset($this->view->pl);
    }

    public function setCueAction()
    {
        $request = $this->getRequest();
		$pos = $this->_getParam('pos');
		$pl = $this->getPlaylist();

		if($request->isPost()) {
			$cueIn = $this->_getParam('cueIn', null);
			$cueOut = $this->_getParam('cueOut', null);

			$response = $pl->changeClipLength($pos, $cueIn, $cueOut);

			$this->view->response = $response;
			return;
		}

		$cues = $pl->getCueInfo($pos);

		$this->view->pos = $pos;
		$this->view->cueIn = $cues[0];
		$this->view->cueOut = $cues[1];
        $this->view->origLength = $cues[2];
		$this->view->html = $this->view->render('playlist/set-cue.phtml');
    }

    public function setFadeAction()
    {
        $request = $this->getRequest();
		$pos = $this->_getParam('pos');
		$pl = $this->getPlaylist();

		if($request->isPost()) {
			$fadeIn = $this->_getParam('fadeIn', null);
			$fadeOut = $this->_getParam('fadeOut', null);

			$response = $pl->changeFadeInfo($pos, $fadeIn, $fadeOut);

			$this->view->response = $response;
			return;
		}

		$this->view->pos = intval($pos);

		$fades = $pl->getFadeInfo($pos+1);
		$this->view->fadeIn = $fades[0];

		$fades = $pl->getFadeInfo($pos);
		$this->view->fadeOut = $fades[1];
		$this->view->html = $this->view->render('playlist/set-fade.phtml');
    }

    public function deleteAction()
    {
        $id = $this->_getParam('id', null);
		$pl = Playlist::Recall($id);
                
		if ($pl !== FALSE) {

			Playlist::Delete($id);

			$pl_sess = $this->pl_sess;

			if($pl_sess->id === $id){
				unset($pl_sess->id);
			}
		}

		$this->view->id = $id;
    }

    public function deleteActiveAction()
    {
        $pl = $this->getPlaylist();	
		Playlist::Delete($pl->getId());

		$pl_sess = $this->pl_sess;
		unset($pl_sess->id);

		$this->view->html = $this->view->render('playlist/index.phtml');
    }

    public function closeAction()
    {
        $pl = $this->getPlaylist();
		$this->closePlaylist($pl);
		
		$this->view->html = $this->view->render('playlist/index.phtml');
    }

    public function setPlaylistFadesAction()
    {
        $request = $this->getRequest();
		$pl = $this->getPlaylist();

		if($request->isPost()) {
			$fadeIn = $this->_getParam('fadeIn', null);
			$fadeOut = $this->_getParam('fadeOut', null);

            if($fadeIn)
			    $response = $pl->changeFadeInfo(0, $fadeIn, $fadeOut);
            else if($fadeOut)
                 $response = $pl->changeFadeInfo($pl->getSize(), $fadeIn, $fadeOut);

			$this->view->response = $response;
			return;
		}

		$fades = $pl->getFadeInfo(0);
		$this->view->fadeIn = $fades[0];

		$fades = $pl->getFadeInfo($pl->getSize());
		$this->view->fadeOut = $fades[1];
    }


}