class.ilExcCriteria.php

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<?php

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

abstract class ilExcCriteria
{
        protected $id; // [int]
        protected $parent; // [int]
        protected $title; // [string]
        protected $desc; // [string]
        protected $required; // [bool]
        protected $pos; // [int]        
        protected $def; // [string]
        
        protected $form; // [ilPropertyFormGUI]
        protected $ass; // [ilExAssignment]
        protected $giver_id; // [int]
        protected $peer_id; // [int]
        
        protected function __construct()
        {       
                
        }
        
        public static function getInstanceById($a_id)                   
        {
                global $ilDB;
                
                $set = $ilDB->query("SELECT *".
                        " FROM exc_crit".
                        " WHERE id = ".$ilDB->quote($a_id, "integer"));
                if($ilDB->numRows($set))
                {
                        $row = $ilDB->fetchAssoc($set);
                        $obj = self::getInstanceByType($row["type"]);
                        $obj->importFromDB($row);
                        return $obj;
                }
        }               
        
        public static function getInstancesByParentId($a_parent_id)
        {
                global $ilDB;
                
                $res = array();
                
                $set = $ilDB->query("SELECT *".
                        " FROM exc_crit".
                        " WHERE parent = ".$ilDB->quote($a_parent_id, "integer").
                        " ORDER BY pos");
                while($row = $ilDB->fetchAssoc($set))
                {
                        $obj = self::getInstanceByType($row["type"]);
                        $obj->importFromDB($row);
                        $res[$obj->getId()] = $obj;
                }       
                
                return $res;
        }
        
        
        //
        // type(s)
        // 
        
        public static function getTypesMap()
        {
                global $lng;
                
                return array(
                        "bool" => $lng->txt("exc_criteria_type_bool")
                        ,"rating" => $lng->txt("exc_criteria_type_rating")
                        ,"text" => $lng->txt("exc_criteria_type_text")
                        ,"file" => $lng->txt("exc_criteria_type_file")                  
                );
        }
        
        public function getTranslatedType()
        {
                $map = $this->getTypesMap();
                return $map[$this->getType()];
        }
        
        public static function getInstanceByType($a_type)                       
        {
                $class = "ilExcCriteria".ucfirst($a_type);
                include_once "Modules/Exercise/classes/class.".$class.".php";
                return new $class;
        }
        
        
        //
        // properties
        // 
        
        public function getId()
        {
                return $this->id;
        }
        
        protected function setId($a_id)
        {
                $this->id = (int)$a_id;
        }
        
        abstract public function getType();
        
        public function setParent($a_value)
        {
                $this->parent = ($a_value !== null)
                        ? (int)$a_value
                        : null;
        }
        
        public function getParent()
        {
                return $this->parent;
        }
        
        public function setTitle($a_value)
        {
                $this->title = ($a_value !== null)
                        ? trim($a_value)
                        : null;
        }
        
        public function getTitle()
        {
                return $this->title;
        }
        
        public function setDescription($a_value)
        {
                $this->desc = ($a_value !== null)
                        ? trim($a_value)
                        : null;
        }
        
        public function getDescription()
        {
                return $this->desc;
        }
        
        public function setRequired($a_value)
        {
                $this->required = (bool)$a_value;
        }
        
        public function isRequired()
        {
                return $this->required;
        }

        public function setPosition($a_value)
        {
                $this->pos = (int)$a_value;
        }
        
        public function getPosition()
        {
                return $this->pos;
        }
        
        protected function setDefinition(array $a_value = null)
        {
                $this->def = $a_value;
        }
        
        protected function getDefinition()
        {
                return $this->def;
        }
        
        public function importDefinition($a_def)
        {
                if($a_def)
                {
                        $a_def = @unserialize($a_def);
                        if(is_array($a_def))
                        {
                                $this->setDefinition($a_def);
                        }
                }               
        }
        
        
        //
        // CRUD
        //
        
        protected function importFromDB(array $a_row)
        {               
                $this->setId($a_row["id"]);
                $this->setParent($a_row["parent"]);
                $this->setTitle($a_row["title"]);
                $this->setDescription($a_row["descr"]);
                $this->setRequired($a_row["required"]);
                $this->setPosition($a_row["pos"]);
                $this->setDefinition($a_row["def"] 
                                ? unserialize($a_row["def"]) 
                                : null);
        }
        
        protected function getDBProperties()
        {
                return array(
                        "type" => array("text", $this->getType())
                        ,"title" => array("text", $this->getTitle())
                        ,"descr" => array("text", $this->getDescription())
                        ,"required" => array("integer", $this->isRequired())
                        ,"pos" => array("integer", $this->getPosition())
                        ,"def" => array("text", is_array($this->getDefinition())
                                ? serialize($this->getDefinition())
                                : null)
                );              
        }
        protected function getLastPosition()
        {
                global $ilDB;
                
                if(!$this->getParent())
                {
                        return;
                }
                
                $set = $ilDB->query("SELECT MAX(pos) pos".
                        " FROM exc_crit".
                        " WHERE parent = ".$ilDB->quote($this->getParent(), "integer"));
                $row = $ilDB->fetchAssoc($set);         
                return (int)$row["pos"];
        }
        
        public function save()
        {
                global $ilDB;
                
                if($this->id)
                {
                        return $this->update();
                }
                
                $this->id = $ilDB->nextId("exc_crit");
                
                $fields = $this->getDBProperties();             
                
                $fields["id"] = array("integer", $this->id);
                $fields["type"] = array("text", $this->getType());
                $fields["parent"] = array("integer", $this->getParent());
                $fields["pos"] = array("integer", $this->getLastPosition()+10);
                
                $ilDB->insert("exc_crit", $fields);
        }
        
        public function update()
        {
                global $ilDB;
                
                if(!$this->id)
                {
                        return $this->save();
                }
                
                $primary = array("id"=>array("integer", $this->id));            
                $ilDB->update("exc_crit", $this->getDBProperties(), $primary);
        }
        
        public function delete()
        {
                global $ilDB;
                
                if(!$this->id)
                {
                        return;
                }
                                
                $ilDB->manipulate("DELETE FROM exc_crit".
                        " WHERE id = ".$ilDB->quote($this->id, "integer"));
        }
        
        public static function deleteByParent($a_parent_id)
        {
                global $ilDB;
                
                if(!(int)$a_parent_id)
                {
                        return;
                }
                
                $ilDB->manipulate("DELETE FROM exc_crit".
                        " WHERE parent = ".$ilDB->quote($a_parent_id, "integer"));      
        }
        
        public function cloneObject($a_target_parent_id)
        {
                $new_obj = ilExcCriteria::getInstanceByType($this->getType());
                $new_obj->setParent($a_target_parent_id);
                $new_obj->setTitle($this->getTitle());
                $new_obj->setDescription($this->getDescription());
                $new_obj->setRequired($this->isRequired());
                $new_obj->setPosition($this->getPosition());
                $new_obj->setDefinition($this->getDefinition());
                $new_obj->save();       
                
                return $new_obj->getId();
        }
        
        
        //
        // ASSIGNMENT EDITOR
        // 
        
        public function initCustomForm(ilPropertyFormGUI $a_form)
        {
                // type-specific
        }
        
        public function exportCustomForm(ilPropertyFormGUI $a_form)
        {
                // type-specific
        }
        
        public function importCustomForm(ilPropertyFormGUI $a_form)
        {
                // type-specific
        }       
        
        
        // PEER REVIEW
        
        public function setPeerReviewContext(ilExAssignment $a_ass, $a_giver_id, $a_peer_id, ilPropertyFormGUI $a_form = null)
        {
                $this->form = $a_form;
                $this->ass = $a_ass;
                $this->giver_id = $a_giver_id;
                $this->peer_id = $a_peer_id;
        }
        
        abstract public function addToPeerReviewForm($a_value = null);
        
        abstract public function importFromPeerReviewForm();
        
        public function updateFromAjax()
        {
                // type-specific
        }               
        
        public function validate($a_value)
        {
                return true;
        }
        
        abstract public function hasValue($a_value);    
        
        abstract public function getHTML($a_value);
                
        public function resetReview()
        {
                // type-specific (only needed for data not kept in exc_assignment_peer)
        }
        
}