sintonia/airtime_mvc/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('add-group', 'json')
                    ->addActionContext('delete-group', 'json')
                    ->addActionContext('set-fade', 'json')
                    ->addActionContext('set-cue', 'json')
                    ->addActionContext('move-item', 'json')
                    ->addActionContext('close', 'json')
                    ->addActionContext('new', 'json')
                    ->addActionContext('edit', 'json')
                    ->addActionContext('delete-active', 'json')
                    ->addActionContext('delete', 'json')
                    ->addActionContext('set-playlist-fades', 'json')
                    ->addActionContext('set-playlist-name', 'json')
                    ->addActionContext('set-playlist-description', '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)) {

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

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

		if(isset($pl_sess->id)) {

			$pl = Application_Model_Playlist::Recall($pl_sess->id);
			if($pl !== FALSE) {
				$this->closePlaylist($pl);
			}
		}

		$userInfo = Zend_Auth::getInstance()->getStorage()->read();

		$pl = Application_Model_Playlist::Recall($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()
    {
        $request = $this->getRequest();
        $baseUrl = $request->getBaseUrl();
        $baseDir = dirname($_SERVER['SCRIPT_FILENAME']);

        $this->view->headScript()->appendFile($baseUrl.'/js/airtime/library/spl.js?'.filemtime($baseDir.'/js/airtime/library/spl.js'),'text/javascript');
		$this->view->headLink()->appendStylesheet($baseUrl.'/css/playlist_builder.css?'.filemtime($baseDir.'/css/playlist_builder.css'));

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

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

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

		$this->changePlaylist($pl->getId());

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

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

		if(!is_null($pl_id)) {
			$this->changePlaylist($pl_id);
		}

		$pl = $this->getPlaylist();
        if($pl === false){
            $this->view->playlist_error = true;
            return false;
        }

		$this->view->pl = $pl;
		$this->view->pl_id = $pl->getId();
		$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 = $this->getPlaylist();
    		if($pl === false){
                $this->view->playlist_error = true;
                return false;
            }
			$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();
            $this->view->description = $pl->getDescription();

			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 = $this->getPlaylist();
        if($pl === false){
            $this->view->playlist_error = true;
            return false;
        }

		$pl->moveAudioClip($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();
        $this->view->description = $pl->getDescription();

		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 = $this->getPlaylist();
        if($pl === false){
            $this->view->playlist_error = true;
            return false;
        }

	    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();
        $this->view->description = $pl->getDescription();

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

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

        if (!is_null($ids)) {
            $pl = $this->getPlaylist();
            if ($pl === false) {
                $this->view->playlist_error = true;
                return false;
            }
            
            foreach ($ids as $key => $value) {
                $res = $pl->addAudioClip($value);
                if (PEAR::isError($res)) {
                    $this->view->message = $res->getMessage();
                    break;
                }
            }

            $this->view->pl = $pl;
            $this->view->html = $this->view->render('playlist/update.phtml');
            $this->view->name = $pl->getName();
            $this->view->length = $pl->getLength();
            $this->view->description = $pl->getDescription();
            return;
        }
        $this->view->message =  "a file is not chosen";
    }
    
    public function deleteGroupAction()
    {
        $ids = $this->_getParam('ids', null);
        
        foreach ($ids as $key => $id) {
            $pl = Application_Model_Playlist::Recall($id);

            if ($pl !== FALSE) {
                Application_Model_Playlist::Delete($id);
                $pl_sess = $this->pl_sess;
                if($pl_sess->id === $id){
                    unset($pl_sess->id);
                }
            } else {
                $this->view->playlist_error = true;
                return false;
            }
        }
        
        $this->view->ids = $ids;
        $this->view->html = $this->view->render('playlist/index.phtml');
    }
    
    public function setCueAction()
    {
		$pos = $this->_getParam('pos');
		$pl = $this->getPlaylist();
        if ($pl === false){
            $this->view->playlist_error = true;
            return false;
        }

		$cueIn = $this->_getParam('cueIn', null);
		$cueOut = $this->_getParam('cueOut', null);

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

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

		if(!isset($response["error"])) {
    		$this->view->pl = $pl;
            $this->view->html = $this->view->render('playlist/update.phtml');
            $this->view->name = $pl->getName();
            $this->view->length = $pl->getLength();
            $this->view->description = $pl->getDescription();

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

    public function setFadeAction()
    {
		$pos = $this->_getParam('pos');
		$pl = $this->getPlaylist();
        if($pl === false){
            $this->view->playlist_error = true;
            return false;
        }

		$fadeIn = $this->_getParam('fadeIn', null);
		$fadeOut = $this->_getParam('fadeOut', null);

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

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

        if(!isset($response["error"])) {
            $this->view->pl = $pl;
            $this->view->html = $this->view->render('playlist/update.phtml');
            $this->view->name = $pl->getName();
            $this->view->length = $pl->getLength();
            $this->view->description = $pl->getDescription();

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

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

		if ($pl !== FALSE) {

			Application_Model_Playlist::Delete($id);

			$pl_sess = $this->pl_sess;

			if($pl_sess->id === $id){
				unset($pl_sess->id);
			}
		}else{
            $this->view->playlist_error = true;
            return false;
        }

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

    public function deleteActiveAction()
    {
        $pl = $this->getPlaylist();
        if($pl === false){
            $this->view->playlist_error = true;
            return false;
        }
		Application_Model_Playlist::Delete($pl->getId());

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

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

    public function closeAction()
    {
        $pl = $this->getPlaylist();
        if($pl === false){
            $this->view->playlist_error = true;
            return false;
        }
		$this->closePlaylist($pl);

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

    public function setPlaylistFadesAction()
    {
        $request = $this->getRequest();
		$pl = $this->getPlaylist();
        if($pl === false){
            $this->view->playlist_error = true;
            return false;
        }

		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];
    }

    public function setPlaylistNameAction()
    {
        $name = $this->_getParam('name', 'Unknown Playlist');

        $pl = $this->getPlaylist();
        if($pl === false){
            $this->view->playlist_error = true;
            return false;
        }
        $pl->setName($name);

        $this->view->playlistName = $name;
    }

    public function setPlaylistDescriptionAction()
    {
        $description = $this->_getParam('description', false);
        $pl = $this->getPlaylist();
        if($pl === false){
            $this->view->playlist_error = true;
            return false;
        }

        if($description != false) {
            $pl->setDescription($description);
        }
        else {
            $description = $pl->getDescription();
        }

        $this->view->playlistDescription = $description;
    }
}