class.ilSurveyConstraintsGUI.php

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<?php
/* Copyright (c) 1998-2010 ILIAS open source, Extended GPL, see docs/LICENSE */

class ilSurveyConstraintsGUI
{
        public function __construct(ilObjSurveyGUI $a_parent_gui)
        {               
                global $ilCtrl, $lng, $tpl;
                
                $this->parent_gui = $a_parent_gui;
                $this->object = $this->parent_gui->object;
                
                $this->ctrl = $ilCtrl;
                $this->lng = $lng;
                $this->tpl = $tpl;
        }
        
        public function executeCommand()
        {
                global $ilCtrl;
                
                $cmd = $ilCtrl->getCmd("constraints");
                $cmd .= "Object";
                
                $this->$cmd();          
        }
        
        public function constraintsObject()
        {                       
                $step = 0;
                if (array_key_exists("step", $_GET))
                {
                        $step = (int)$_GET["step"];
                }
                switch ($step)
                {
                        case 1:
                                $this->constraintStep1Object();
                                return;
                                break;
                        case 2:
                                return;
                                break;
                        case 3:
                                return;
                                break;
                }
                
                $hasDatasets = ilObjSurvey::_hasDatasets($this->object->getSurveyId());
                
                include_once "Modules/Survey/classes/tables/class.SurveyConstraintsTableGUI.php";
                $tbl = new SurveyConstraintsTableGUI($this, "constraints", $this->object, $hasDatasets);
                $this->tpl->setContent($tbl->getHTML());
                
                if ($hasDatasets)
                {                                               
                        // ilUtil::sendInfo($this->lng->txt("survey_has_datasets_warning"));
                        $link = $this->ctrl->getLinkTargetByClass("ilSurveyParticipantsGUI", "maintenance");
                        $link = "<a href=\"".$link."\">".$this->lng->txt("survey_has_datasets_warning_page_view_link")."</a>";
                        ilUtil::sendInfo($this->lng->txt("survey_has_datasets_warning_page_view")." ".$link);
                }
                else
                {
                        $_SESSION["constraintstructure"] = $tbl->getStructure();                
                }
        }
        
        public function constraintsAddObject()
        {                               
                if (strlen($_POST["v"]) == 0)
                {
                        ilUtil::sendFailure($this->lng->txt("msg_enter_value_for_valid_constraint"));
                        return $this->constraintStep3Object();
                }
                $survey_questions =& $this->object->getSurveyQuestions();
                $structure =& $_SESSION["constraintstructure"];
                $include_elements = $_SESSION["includeElements"];
                foreach ($include_elements as $elementCounter)
                {
                        if (is_array($structure[$elementCounter]))
                        {
                                if (strlen($_GET["precondition"]))
                                {
                                        $this->object->updateConstraint($_GET['precondition'], $_POST["q"], $_POST["r"], $_POST["v"], $_POST['c']);
                                }
                                else
                                {
                                        $constraint_id = $this->object->addConstraint($_POST["q"], $_POST["r"], $_POST["v"], $_POST['c']);
                                        foreach ($structure[$elementCounter] as $key => $question_id)
                                        {
                                                $this->object->addConstraintToQuestion($question_id, $constraint_id);
                                        }
                                }
                                if (count($structure[$elementCounter]) > 1)
                                {
                                        $this->object->updateConjunctionForQuestions($structure[$elementCounter], $_POST['c']);
                                }
                        }
                }
                unset($_SESSION["includeElements"]);
                unset($_SESSION["constraintstructure"]);
                $this->ctrl->redirect($this, "constraints");
        }

        public function constraintStep1Object()
        {                               
                $survey_questions =& $this->object->getSurveyQuestions();
                $structure =& $_SESSION["constraintstructure"];
                $start = $_GET["start"];
                $option_questions = array();
                for ($i = 1; $i < $start; $i++)
                {
                        if (is_array($structure[$i]))
                        {
                                foreach ($structure[$i] as $key => $question_id)
                                {
                                        if ($survey_questions[$question_id]["usableForPrecondition"])
                                        {
                                                array_push($option_questions, array("question_id" => $survey_questions[$question_id]["question_id"], "title" => $survey_questions[$question_id]["title"], "type_tag" => $survey_questions[$question_id]["type_tag"]));
                                        }
                                }
                        }
                }
                if (count($option_questions) == 0)
                {
                        unset($_SESSION["includeElements"]);
                        unset($_SESSION["constraintstructure"]);
                        ilUtil::sendInfo($this->lng->txt("constraints_no_nonessay_available"), true);
                        $this->ctrl->redirect($this, "constraints");
                }
                $this->constraintForm(1, $_POST, $survey_questions, $option_questions);
        }
        
        public function constraintStep2Object()
        {
                $survey_questions =& $this->object->getSurveyQuestions();
                $option_questions = array();
                array_push($option_questions, array("question_id" => $_POST["q"], "title" => $survey_questions[$_POST["q"]]["title"], "type_tag" => $survey_questions[$_POST["q"]]["type_tag"]));
                $this->constraintForm(2, $_POST, $survey_questions, $option_questions);
        }
        
        public function constraintStep3Object()
        {
                $survey_questions =& $this->object->getSurveyQuestions();
                $option_questions = array();
                if (strlen($_GET["precondition"]))
                {       
                        if(!$this->validateConstraintForEdit($_GET["precondition"]))
                        {
                                $this->ctrl->redirect($this, "constraints");
                        }
                        
                        $pc = $this->object->getPrecondition($_GET["precondition"]);
                        $postvalues = array(
                                "c" => $pc["conjunction"],
                                "q" => $pc["question_fi"],
                                "r" => $pc["relation_id"],
                                "v" => $pc["value"]
                        );
                        array_push($option_questions, array("question_id" => $pc["question_fi"], "title" => $survey_questions[$pc["question_fi"]]["title"], "type_tag" => $survey_questions[$pc["question_fi"]]["type_tag"]));
                        $this->constraintForm(3, $postvalues, $survey_questions, $option_questions);
                }
                else
                {
                        array_push($option_questions, array("question_id" => $_POST["q"], "title" => $survey_questions[$_POST["q"]]["title"], "type_tag" => $survey_questions[$_POST["q"]]["type_tag"]));
                        $this->constraintForm(3, $_POST, $survey_questions, $option_questions);
                }
        }
        
        public function constraintForm($step, $postvalues, &$survey_questions, $questions = FALSE)
        {
                if (strlen($_GET["start"])) $this->ctrl->setParameter($this, "start", $_GET["start"]);
                $this->ctrl->saveParameter($this, "precondition");
                include_once("./Services/Form/classes/class.ilPropertyFormGUI.php");
                $form = new ilPropertyFormGUI();
                $form->setFormAction($this->ctrl->getFormAction($this));
                $form->setTableWidth("100%");
                $form->setId("constraintsForm");
                                
                // #9366
                $title = array();               
                $title_ids = $_SESSION["includeElements"];
                if(!$title_ids)
                {
                        $title_ids = array($_GET["start"]);
                }
                foreach($title_ids as $title_id)
                {
                        // question block
                        if ($survey_questions[$_SESSION["constraintstructure"][$title_id][0]]["questionblock_id"] > 0)
                        {
                                $title[] = $this->lng->txt("questionblock") . ": " . $survey_questions[$_SESSION["constraintstructure"][$title_id][0]]["questionblock_title"];
                        }
                        // question
                        else
                        {
                                $title[] = $this->lng->txt($survey_questions[$_SESSION["constraintstructure"][$title_id][0]]["type_tag"]) . ": " . 
                                        $survey_questions[$_SESSION["constraintstructure"][$title_id][0]]["title"];
                        }
                }
                $header = new ilFormSectionHeaderGUI();
                $header->setTitle(implode("<br/>", $title));
                $form->addItem($header);
                
                $fulfilled = new ilRadioGroupInputGUI($this->lng->txt("constraint_fulfilled"), "c");
                $fulfilled->addOption(new ilRadioOption($this->lng->txt("conjunction_and"), '0', ''));
                $fulfilled->addOption(new ilRadioOption($this->lng->txt("conjunction_or"), '1', ''));
                $fulfilled->setValue((strlen($postvalues['c'])) ? $postvalues['c'] : 0);
                $form->addItem($fulfilled);

                $step1 = new ilSelectInputGUI($this->lng->txt("step") . " 1: " . $this->lng->txt("select_prior_question"), "q");
                $options = array();
                if (is_array($questions))
                {
                        foreach ($questions as $question)
                        {
                                $options[$question["question_id"]] = $question["title"] . " (" . SurveyQuestion::_getQuestionTypeName($question["type_tag"]) . ")";
                        }
                }
                $step1->setOptions($options);
                $step1->setValue($postvalues["q"]);
                $form->addItem($step1);

                if ($step > 1)
                {
                        $relations = $this->object->getAllRelations();
                        $step2 = new ilSelectInputGUI($this->lng->txt("step") . " 2: " . $this->lng->txt("select_relation"), "r");
                        $options = array();
                        foreach ($relations as $rel_id => $relation)
                        {
                                if (in_array($relation["short"], $survey_questions[$postvalues["q"]]["availableRelations"]))
                                {
                                        $options[$rel_id] = $relation['short'];
                                }
                        }
                        $step2->setOptions($options);
                        $step2->setValue($postvalues["r"]);
                        $form->addItem($step2);
                }
                
                if ($step > 2)
                {
                        $variables =& $this->object->getVariables($postvalues["q"]);
                        $question_type = $survey_questions[$postvalues["q"]]["type_tag"];
                        include_once "./Modules/SurveyQuestionPool/classes/class.SurveyQuestion.php";
                        SurveyQuestion::_includeClass($question_type);
                        $question = new $question_type();
                        $question->loadFromDb($postvalues["q"]);

                        $step3 = $question->getPreconditionSelectValue($postvalues["v"], $this->lng->txt("step") . " 3: " . $this->lng->txt("select_value"), "v");
                        $form->addItem($step3);
                }

                switch ($step)
                {
                        case 1:
                                $cmd_continue = "constraintStep2";
                                $cmd_back = "constraints";
                                break;
                        case 2:
                                $cmd_continue = "constraintStep3";
                                $cmd_back = "constraintStep1";
                                break;
                        case 3:
                                $cmd_continue = "constraintsAdd";
                                $cmd_back = "constraintStep2";
                                break;
                }
                $form->addCommandButton($cmd_back, $this->lng->txt("back"));
                $form->addCommandButton($cmd_continue, $this->lng->txt("continue"));

                $this->tpl->setVariable("ADM_CONTENT", $form->getHTML());
        }
        
        protected function validateConstraintForEdit($a_id)
        {
                global $ilAccess;
                
                if(ilObjSurvey::_hasDatasets($this->object->getSurveyId()))
                {
                        return false;
                }
                if(!$ilAccess->checkAccess("write", "", $this->object->getRefId()))
                {
                        return false;
                }
                
                return true;
        }       
        
        public function confirmDeleteConstraintsObject()
        {
                $id = (int)$_REQUEST["precondition"];
                if(!$this->validateConstraintForEdit($id))      
                {       
                        $this->ctrl->redirect($this, "constraints");
                }
                
                $constraint = $this->object->getPrecondition($id);
                $questions = $this->object->getSurveyQuestions();
                $question = $questions[$constraint["question_fi"]];
                $relation = $questions[$constraint["ref_question_fi"]]; 
                $relation = $relation["title"];
                
                // see ilSurveyConstraintsTableGUI
                include_once "./Modules/SurveyQuestionPool/classes/class.SurveyQuestion.php";
                $question_type = SurveyQuestion::_getQuestionType($constraint["question_fi"]);
                SurveyQuestion::_includeClass($question_type);
                $question_obj = new $question_type();
                $question_obj->loadFromDb($constraint["question_fi"]);
                $valueoutput = $question_obj->getPreconditionValueOutput($constraint["value"]);
                
                $title = $question["title"]." ".$constraint["shortname"]." ".$valueoutput;
                
                $this->ctrl->saveParameter($this, "precondition");
                
                include_once("./Services/Utilities/classes/class.ilConfirmationGUI.php");
                $cgui = new ilConfirmationGUI();
                $cgui->setHeaderText(sprintf($this->lng->txt("survey_sure_delete_constraint"), $title, $relation));

                $cgui->setFormAction($this->ctrl->getFormAction($this, "deleteConstraints"));
                $cgui->setCancel($this->lng->txt("cancel"), "constraints");
                $cgui->setConfirm($this->lng->txt("confirm"), "deleteConstraints");
                
                $this->tpl->setContent($cgui->getHTML());
        }

        public function deleteConstraintsObject()
        {
                $id = (int)$_REQUEST["precondition"];
                if($this->validateConstraintForEdit($id))       
                {               
                        ilUtil::sendSuccess($this->lng->txt("survey_constraint_deleted"), true);
                        $this->object->deleteConstraint($id);                   
                }

                $this->ctrl->redirect($this, "constraints");
        }
        
        function createConstraintsObject()
        {
                $include_elements = $_POST["includeElements"];
                if ((!is_array($include_elements)) || (count($include_elements) == 0))
                {
                        ilUtil::sendInfo($this->lng->txt("constraints_no_questions_or_questionblocks_selected"), true);
                        $this->ctrl->redirect($this, "constraints");
                }
                else if (count($include_elements) >= 1)
                {
                        $_SESSION["includeElements"] = $include_elements;
                        sort($include_elements, SORT_NUMERIC);
                        $_GET["start"] = $include_elements[0];
                        $this->constraintStep1Object();
                }
        }
        
        function editPreconditionObject()
        {
                if(!$this->validateConstraintForEdit($_GET["precondition"]))    
                {
                        $this->ctrl->redirect($this, "constraints");
                }
                
                $_SESSION["includeElements"] = array($_GET["start"]);
                $this->ctrl->setParameter($this, "precondition", $_GET["precondition"]);
                $this->ctrl->setParameter($this, "start", $_GET["start"]);
                $this->ctrl->redirect($this, "constraintStep3");
        }
}

?>