course/classes/class.ilCourseRegisterGUI.php

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<?php
/*
        +-----------------------------------------------------------------------------+
        | ILIAS open source                                                           |
        +-----------------------------------------------------------------------------+
        | Copyright (c) 1998-2001 ILIAS open source, University of Cologne            |
        |                                                                             |
        | This program is free software; you can redistribute it and/or               |
        | modify it under the terms of the GNU General Public License                 |
        | as published by the Free Software Foundation; either version 2              |
        | of the License, or (at your option) any later version.                      |
        |                                                                             |
        | This program is distributed in the hope that it will be useful,             |
        | but WITHOUT ANY WARRANTY; without even the implied warranty of              |
        | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               |
        | GNU General Public License for more details.                                |
        |                                                                             |
        | You should have received a copy of the GNU General Public License           |
        | along with this program; if not, write to the Free Software                 |
        | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. |
        +-----------------------------------------------------------------------------+
*/


class ilCourseRegisterGUI
{
        var $ctrl;
        var $ilias;
        var $tree;
        var $ilErr;
        var $lng;
        var $tpl;

        var $course_obj;
        var $course_id;
        var $user_id;
        
        function ilCourseRegisterGUI($a_course_id)
        {
                global $ilCtrl,$lng,$ilErr,$ilias,$tpl,$tree;

                $this->ctrl =& $ilCtrl;
                $this->ctrl->saveParameter($this,array("ref_id"));

                $this->ilErr =& $ilErr;
                $this->lng =& $lng;
                $this->tpl =& $tpl;
                $this->tree =& $tree;

                $this->user_id = $ilias->account->getId();

                $this->course_id = $a_course_id;
                $this->__initCourseObject();
        }

        function &executeCommand()
        {
                switch($cmd = $this->ctrl->getCmd())
                {
                        case 'archive':
                        case '':
                                $cmd = "showRegistrationForm";
                                break;
                }
                $this->$cmd();
        }

        function cancel()
        {
                sendInfo($this->lng->txt("action_aborted"),true);

                $this->ctrl->setParameterByClass("ilRepositoryGUI","ref_id",$this->tree->getParentId($this->course_id));
                $this->ctrl->redirectByClass("ilRepositoryGUI","ShowList");
                
        }

        function subscribe()
        {
                switch($this->course_obj->getSubscriptionType())
                {
                        case $this->course_obj->SUBSCRIPTION_DEACTIVATED:
                                $this->ilErr->raiseError($this->lng->txt("err_unknown_error"),$this->ilErr->MESSAGE);
                                exit;

                        case $this->course_obj->SUBSCRIPTION_DIRECT:
                                
                                $tmp_obj =& ilObjectFactory::getInstanceByObjId($this->user_id);

                                if($this->course_obj->members_obj->add($tmp_obj,$this->course_obj->members_obj->ROLE_MEMBER))
                                {
                                        $this->course_obj->members_obj->sendNotification($this->course_obj->members_obj->NOTIFY_ADMINS,$this->user_id);
                                        ilObjUser::updateActiveRoles($this->user_id);
                                        sendInfo($this->lng->txt("crs_subscription_successful"),true);
                                        $this->ctrl->returnToParent($this);
                                }
                                else
                                {
                                        sendInfo("err_unknown_error");
                                        $this->showRegistrationForm();
                                }
                                break;

                        case $this->course_obj->SUBSCRIPTION_CONFIRMATION:

                                if($this->course_obj->members_obj->addSubscriber($this->user_id))
                                {
                                        $this->course_obj->members_obj->sendNotification($this->course_obj->members_obj->NOTIFY_ADMINS,$this->user_id);
                                        sendInfo($this->lng->txt("crs_subscription_successful"),true);
                                        $this->ctrl->setParameterByClass("ilRepositoryGUI","ref_id",$this->tree->getParentId($this->course_id));
                                        $this->ctrl->redirectByClass("ilRepositoryGUI","ShowList");
                                }
                                else
                                {
                                        sendInfo("err_unknown_error");
                                        $this->showRegistrationForm();
                                }
                                break;

                        case $this->course_obj->SUBSCRIPTION_PASSWORD:

                                $tmp_obj =& ilObjectFactory::getInstanceByObjId($this->user_id);

                                if($this->course_obj->getSubscriptionPassword() != $_POST["password"])
                                {
                                        sendInfo($this->lng->txt("crs_password_not_valid"),true);
                                        $this->showRegistrationForm();
                                }
                                else if($this->course_obj->members_obj->add($tmp_obj,$this->course_obj->members_obj->ROLE_MEMBER))
                                {
                                        $this->course_obj->members_obj->sendNotification($this->course_obj->members_obj->NOTIFY_ADMINS,$this->user_id);
                                        ilObjUser::updateActiveRoles($this->user_id);
                                        sendInfo($this->lng->txt("crs_subscription_successful"),true);
                                        $this->ctrl->returnToParent($this);
                                }
                                else
                                {
                                        sendInfo("err_unknown_error");
                                        $this->showRegistrationForm();
                                }
                                break;
                }
        }

        function showRegistrationForm()
        {
                $really_submit = $this->__validateStatus();

                if($this->course_obj->getMessage())
                {
                        sendInfo($this->course_obj->getMessage());
                }

                $this->tpl->addBlockFile("ADM_CONTENT", "adm_content", "tpl.crs_subscription.html","course");
                $this->tpl->setVariable("FORMACTION",$this->ctrl->getFormActionByClass("ilObjCourseGUI"));
                
                $this->tpl->setVariable("TYPE_IMG",ilUtil::getImagePath("icon_crs.gif"));
                $this->tpl->setVariable("ALT_IMG",$this->lng->txt("obj_crs"));
                $this->tpl->setVariable("TITLE",$this->lng->txt("crs_registration"));

                $this->tpl->setVariable("TXT_SYLLABUS",$this->lng->txt("crs_syllabus"));
                $this->tpl->setVariable("SYLLABUS",nl2br($this->course_obj->getSyllabus()));

                $this->tpl->setVariable("TXT_INFO_REG",$this->lng->txt("crs_info_reg"));

                if($courses = $this->__getGroupingCourses())
                {
                        $this->tpl->setVariable("INFO_REG_PRE",$this->lng->txt('crs_grp_info_reg').$courses.'<br>');
                }

                switch($this->course_obj->getSubscriptionType())
                {
                        case $this->course_obj->SUBSCRIPTION_DEACTIVATED:
                                $this->tpl->setVariable("INFO_REG",$this->lng->txt("crs_info_reg_deactivated"));
                                break;
                        case $this->course_obj->SUBSCRIPTION_CONFIRMATION:
                                $this->tpl->setVariable("INFO_REG",$this->lng->txt("crs_info_reg_confirmation"));
                                break;
                        case $this->course_obj->SUBSCRIPTION_DIRECT:
                                $this->tpl->setVariable("INFO_REG",$this->lng->txt("crs_info_reg_direct"));
                                break;
                        case $this->course_obj->SUBSCRIPTION_PASSWORD:
                                $this->tpl->setVariable("INFO_REG",$this->lng->txt("crs_info_reg_password"));
                                break;
                }

                if($this->course_obj->getSubscriptionType() != $this->course_obj->SUBSCRIPTION_DEACTIVATED)
                {
                        $this->tpl->setCurrentBlock("reg_until");
                        $this->tpl->setVariable("TXT_REG_UNTIL",$this->lng->txt("crs_reg_until"));

                        if($this->course_obj->getSubscriptionUnlimitedStatus())
                        {
                                $this->tpl->setVariable("REG_UNTIL",$this->lng->txt("crs_unlimited"));
                        }
                        else if($this->course_obj->getSubscriptionStart() < time())
                        {
                                $this->tpl->setVariable("FROM",$this->lng->txt("crs_to"));
                                $this->tpl->setVariable("REG_UNTIL",strftime("%c",$this->course_obj->getSubscriptionEnd()));
                        }
                        else if($this->course_obj->getSubscriptionStart() > time())
                        {
                                $this->tpl->setVariable("FROM",$this->lng->txt("crs_from"));
                                $this->tpl->setVariable("REG_UNTIL",strftime("%c",$this->course_obj->getSubscriptionStart()));
                        }
                        $this->tpl->parseCurrentBlock();
                }

                if($this->course_obj->getSubscriptionType() == $this->course_obj->SUBSCRIPTION_PASSWORD and
                   $this->course_obj->inSubscriptionTime())
                {
                        $this->tpl->setCurrentBlock("pass");
                        $this->tpl->setVariable("TXT_PASSWORD",$this->lng->txt("crs_access_password"));
                        $this->tpl->parseCurrentBlock();
                }

                $this->tpl->setVariable("TXT_CANCEL",$this->lng->txt("cancel"));

                if($really_submit)
                {
                        $this->tpl->setCurrentBlock("go");
                        $this->tpl->setVariable("CMD_SUBMIT","subscribe");
                        $this->tpl->setVariable("TXT_SUBMIT",$this->lng->txt("register"));
                        $this->tpl->parseCurrentBlock();
                }
                        

                return true;
        }


        // PRIVATE
        function __initCourseObject()
        {
                if(!$this->course_obj =& ilObjectFactory::getInstanceByRefId($this->course_id,false))
                {
                        $this->ilErr->raiseError("ilCourseRegisterGUI: cannot create course object",$this->ilErr->MESSAGE);
                        exit;
                }
                $this->course_obj->initCourseMemberObject();

                return true;
        }

        function __validateStatus()
        {
                $this->course_obj->setMessage('');

                if($this->course_obj->members_obj->isAssigned($this->user_id))
                {
                        $this->course_obj->appendMessage($this->lng->txt("crs_reg_user_already_assigned"));
                }
                if($this->course_obj->members_obj->isBlocked($this->user_id))
                {
                        $this->course_obj->appendMessage($this->lng->txt("crs_reg_user_blocked"));
                }
                if($this->course_obj->members_obj->isSubscriber($this->user_id))
                {
                        $this->course_obj->appendMessage($this->lng->txt("crs_reg_user_already_subscribed"));
                }
                if($this->course_obj->getSubscriptionType() == $this->course_obj->SUBSCRIPTION_DEACTIVATED)
                {
                        $this->course_obj->appendMessage($this->lng->txt("crs_reg_subscription_deactivated"));
                }
                if(!$this->course_obj->getSubscriptionUnlimitedStatus() and
                   ( time() < $this->course_obj->getSubscriptionStart()))
                {
                        $this->course_obj->appendMessage($this->lng->txt("crs_reg_subscription_start_later"));
                }
                if(!$this->course_obj->getSubscriptionUnlimitedStatus() and
                   ( time() > $this->course_obj->getSubscriptionEnd()))
                {
                        $this->course_obj->appendMessage($this->lng->txt("crs_reg_subscription_end_earlier"));
                }
                if($this->course_obj->getSubscriptionMaxMembers() and 
                   ($this->course_obj->members_obj->getCountMembers() >= $this->course_obj->getSubscriptionMaxMembers()))
                {
                        $this->course_obj->appendMessage($this->lng->txt("crs_reg_subscription_max_members_reached"));
                }
                $this->__checkGroupingDependencies();

                return $this->course_obj->getMessage() ? false : true;
        }
        function __checkGroupingDependencies()
        {
                global $ilUser;

                include_once './classes/class.ilConditionHandler.php';
                include_once './course/classes/class.ilCourseMembers.php';

                $trigger_ids = array();
                foreach(ilConditionHandler::_getConditionsOfTarget($this->course_obj->getId(),'crs') as $condition)
                {
                        if($condition['operator'] == 'not_member')
                        {
                                $trigger_ids[] = $condition['trigger_obj_id'];
                                break;
                        }
                }
                if(!count($trigger_ids))
                {
                        return false;
                }

                foreach($trigger_ids as $trigger_id)
                {
                        foreach(ilConditionHandler::_getConditionsOfTrigger('crsg',$trigger_id) as $condition)
                        {
                                if($condition['operator'] == 'not_member')
                                {
                                        switch($condition['value'])
                                        {
                                                case 'matriculation':
                                                        if(!strlen($ilUser->getMatriculation()))
                                                        {
                                                                if(!$matriculation_message)
                                                                {
                                                                        $matriculation_message = $this->lng->txt('crs_grp_matriculation_required');
                                                                }
                                                        }
                                        }
                                        if(ilCourseMembers::_isMember($ilUser->getId(),$condition['target_obj_id'],$condition['value']))
                                        {
                                                if(!$assigned_message)
                                                {
                                                        $assigned_message = $this->lng->txt('crs_grp_already_assigned');
                                                }
                                        }
                                }
                        }
                }
                if($matriculation_message)
                {
                        $this->course_obj->appendMessage($matriculation_message);
                }
                elseif($assigned_message)
                {
                        $this->course_obj->appendMessage($assigned_message);
                }
                return false;
        }
        function __getGroupingCourses()
        {
                global $tree;

                include_once './classes/class.ilConditionHandler.php';
                include_once './course/classes/class.ilCourseMembers.php';

                $trigger_ids = array();
                foreach(ilConditionHandler::_getConditionsOfTarget($this->course_obj->getId(),'crs') as $condition)
                {
                        if($condition['operator'] == 'not_member')
                        {
                                $trigger_ids[] = $condition['trigger_obj_id'];
                        }
                }
                if(!count($trigger_ids))
                {
                        return false;
                }
                foreach($trigger_ids as $trigger_id)
                {
                        foreach(ilConditionHandler::_getConditionsOfTrigger('crsg',$trigger_id) as $condition)
                        {
                                if($condition['operator'] == 'not_member')
                                {
                                        if(!$hash_table[$condition['target_ref_id']])
                                        {
                                                $tmp_obj =& ilObjectFactory::getInstanceByRefId($condition['target_ref_id']);
                                                $courses .= (' <br/>'.$this->__formatPath($tree->getPathFull($tmp_obj->getRefId())));
                                        }
                                        $hash_table[$condition['target_ref_id']] = true;
                                }
                        }
                }
                return $courses;
        }

        function __formatPath($a_path_arr)
        {
                $counter = 0;
                foreach($a_path_arr as $data)
                {
                        if($counter++)
                        {
                                $path .= " -> ";
                        }
                        $path .= $data['title'];
                }

                if(strlen($path) > 40)
                {
                        return '...'.substr($path,-40);
                }
                return $path;
        }
}
?>