ViewController.php

<?php

class Courses_ViewController extends App_Controller_Action
{
    public function indexAction()
    {
    	$requestId = $this->getRequest()->getParam('id');
        $myRequestSession = new Zend_Session_Namespace('My Requests');
    	if ($requestId == 'session') {
    		$session = new Zend_Session_Namespace('Edit Request');
    		$request = $session->request;
    		$course = $session->course;
    		$parentCourse = $session->parentCourse;
    		if ($request->getId()) {
    			$initialRequest = false;
    		} else {
    			$initialRequest = true;
    		}
    		$preview = true;
    	} else {
            $request = Requests_RequestModel::find($requestId);
            $course = Courses_CourseModel::findLatestOfRequest($request);

	        $parentCourse = null;
	        if (in_array($request->getType(), array('ChangeCourse', 'AddISToCourse', 'AddACEAndChangeCourse'))) {
	            $parentCourse = Courses_CourseModel::findParentOfRequest($request);
	        }
	        $initialRequest = false;
	        $preview = false;
	        
	        // if we can know our role, we can create next and prev links.
            $roleId = $myRequestSession->lastRoleId;
            $list = $myRequestSession->lastList;
	        if ($roleId) {
	        	$requestOrder = $myRequestSession->requestOrder[$roleId][$list];
	        	$listPosition = array_search($request->getId(), $requestOrder);
	        	if ($listPosition == 0) {
	        		$prevRequestId = $requestOrder[count($requestOrder) - 1];
	        	} else {
	        		$prevRequestId = $requestOrder[$listPosition - 1];
	        	}
	        	if ($listPosition == count($requestOrder) - 1) {
	        		$nextRequestId = $requestOrder[0];
	        	} else {
	        		$nextRequestId = $requestOrder[$listPosition + 1];
	        	}
	        }
    	}

    	$comments = Requests_CommentsModel::findByRequest($request);
    	$user = Auth_UserModel::findCurrentUser();

        $action = null;
        $canEdit = false;
    	if ($request->getId()) {
        	$possibleAction = Requests_ApprovalActionModel::findByRequest($request);
        	if ($possibleAction instanceof Requests_ApprovalActionSubmitterApprovalModel && $request->getOwner() == $user->getId()) {
        	    $action = $possibleAction;
        	}
        	
            $userRoles = Requests_ApprovalRoleModel::findByUser($user);
            
        	$allowedRoles = array_intersect(array(1) + $possibleAction->getParticipatingRoleIds(), $userRoles->getId());
        	if (count($allowedRoles) > 0) {
        	    $action = $possibleAction;
        	}
        	$editAllowedRoles = array_intersect(array(1) + $possibleAction->getEditingRoleIds(), $userRoles->getId());
        	if (count($editAllowedRoles) > 0) {
        	    $canEdit = true;
        	}