class.ilExcCriteriaCatalogue.php

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<?php

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

class ilExcCriteriaCatalogue
{
    protected $db;

    protected $id; // [int]
    protected $parent; // [int]
    protected $title; // [string]
    protected $pos; // [int]
    
    public function __construct($a_id = null)
    {
        global $DIC;

        $this->db = $DIC->database();
        $this->read($a_id);
    }
    
    public static function getInstancesByParentId($a_parent_id)
    {
        global $DIC;

        $ilDB = $DIC->database();
        
        $res = array();
        
        $set = $ilDB->query("SELECT *" .
            " FROM exc_crit_cat" .
            " WHERE parent = " . $ilDB->quote($a_parent_id, "integer") .
            " ORDER BY pos");
        while ($row = $ilDB->fetchAssoc($set)) {
            $obj = new self();
            $obj->importFromDB($row);
            $res[$obj->getId()] = $obj;
        }
        
        return $res;
    }
    
    
    //
    // properties
    //
    
    public function getId()
    {
        return $this->id;
    }
    
    protected function setId($a_id)
    {
        $this->id = (int) $a_id;
    }
    
    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 setPosition($a_value)
    {
        $this->pos = (int) $a_value;
    }
    
    public function getPosition()
    {
        return $this->pos;
    }
    
    
    //
    // CRUD
    //
    
    protected function importFromDB(array $a_row)
    {
        $this->setId($a_row["id"]);
        $this->setParent($a_row["parent"]);
        $this->setTitle($a_row["title"]);
        $this->setPosition($a_row["pos"]);
    }
    
    protected function getDBProperties()
    {
        return array(
            "title" => array("text", $this->getTitle())
            ,"pos" => array("integer", $this->getPosition())
        );
    }
    protected function getLastPosition()
    {
        $ilDB = $this->db;
        
        if (!$this->getParent()) {
            return;
        }
        
        $set = $ilDB->query("SELECT MAX(pos) pos" .
            " FROM exc_crit_cat" .
            " WHERE parent = " . $ilDB->quote($this->getParent(), "integer"));
        $row = $ilDB->fetchAssoc($set);
        return (int) $row["pos"];
    }
    
    protected function read($a_id)
    {
        $ilDB = $this->db;
        
        $a_id = (int) $a_id;
        if ($a_id) {
            $set = $ilDB->query("SELECT *" .
                " FROM exc_crit_cat" .
                " WHERE id = " . $ilDB->quote($a_id, "integer"));
            if ($ilDB->numRows($set)) {
                $row = $ilDB->fetchAssoc($set);
                $this->importFromDB($row);
            }
        }
    }
    
    public function save()
    {
        $ilDB = $this->db;
        
        if ($this->id) {
            return $this->update();
        }
        
        $this->id = $ilDB->nextId("exc_crit_cat");
        
        $fields = $this->getDBProperties();
        $fields["parent"] = array("integer", $this->getParent());
        $fields["pos"] = array("integer", $this->getLastPosition() + 10);
        $fields["id"] = array("integer", $this->id);
        
        $ilDB->insert("exc_crit_cat", $fields);
    }
    
    public function update()
    {
        $ilDB = $this->db;
        
        if (!$this->id) {
            return $this->save();
        }
        
        $primary = array("id" => array("integer", $this->id));
        $ilDB->update("exc_crit_cat", $this->getDBProperties(), $primary);
    }
    
    public function delete()
    {
        $ilDB = $this->db;
        
        if (!$this->id) {
            return;
        }
        
        include_once "Modules/Exercise/classes/class.ilExcCriteria.php";
        ilExcCriteria::deleteByParent($this->id);
                
        $ilDB->manipulate("DELETE FROM exc_crit_cat" .
            " WHERE id = " . $ilDB->quote($this->id, "integer"));
    }
    
    public static function deleteByParent($a_parent_id)
    {
        global $DIC;

        $ilDB = $DIC->database();
        
        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 = new self();
        $new_obj->setParent($a_target_parent_id);
        $new_obj->setTitle($this->getTitle());
        $new_obj->setPosition($this->getPosition());
        $new_obj->save();
        
        include_once "Modules/Exercise/classes/class.ilExcCriteria.php";
        foreach (ilExcCriteria::getInstancesByParentId($this->getId()) as $crit) {
            $crit->cloneObject($new_obj->getId());
        }
        
        return $new_obj->getId();
    }
}