class.ilTaxNodeAssignment.php

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<?php

/* Copyright (c) 1998-2012 ILIAS open source, Extended GPL, see docs/LICENSE */

include_once("./Services/Taxonomy/exceptions/class.ilTaxonomyException.php");

class ilTaxNodeAssignment
{
        function __construct($a_component_id, $a_item_type, $a_tax_id)
        {
                if ($a_component_id == "")
                {
                        throw new ilTaxonomyException('No component ID passed to ilTaxNodeAssignment.');
                }
                
                if ($a_item_type == "")
                {
                        throw new ilTaxonomyException('No item type passed to ilTaxNodeAssignment.');
                }

                if ((int) $a_tax_id == 0)
                {
                        throw new ilTaxonomyException('No taxonomy ID passed to ilTaxNodeAssignment.');
                }

                $this->setComponentId($a_component_id);
                $this->setItemType($a_item_type);
                $this->setTaxonomyId($a_tax_id);
        }
        
        protected function setComponentId($a_val)
        {
                $this->component_id = $a_val;
        }
        
        public function getComponentId()
        {
                return $this->component_id;
        }
        
        protected function setItemType($a_val)
        {
                $this->item_type = $a_val;
        }
        
        public function getItemType()
        {
                return $this->item_type;
        }
        
        protected function setTaxonomyId($a_val)
        {
                $this->taxonomy_id = $a_val;
        }
        
        public function getTaxonomyId()
        {
                return $this->taxonomy_id;
        }
        
        final public function getAssignmentsOfNode($a_node_id)
        {
                global $ilDB;
                
                if (is_array($a_node_id))
                {
                        $set = $ilDB->query("SELECT * FROM tax_node_assignment ".
                                " WHERE ".$ilDB->in("node_id", $a_node_id, false, "integer")
                                );
                }
                else
                {
                        $set = $ilDB->query("SELECT * FROM tax_node_assignment ".
                                " WHERE node_id = ".$ilDB->quote($a_node_id, "integer")
                                );
                }
                $ass = array();
                while ($rec  = $ilDB->fetchAssoc($set))
                {
                        $ass[] = $rec;
                }
                
                return $ass;
        }
        
        final public function getAssignmentsOfItem($a_item_id)
        {
                global $ilDB;

                $set = $ilDB->query("SELECT * FROM tax_node_assignment ".
                        " WHERE component = ".$ilDB->quote($this->getComponentId(), "text").
                        " AND item_type = ".$ilDB->quote($this->getItemType(), "text").
                        " AND item_id = ".$ilDB->quote($a_item_id, "integer")
                        );
                $ass = array();
                while ($rec  = $ilDB->fetchAssoc($set))
                {
                        $ass[] = $rec;
                }
                return $ass;
        }
        
        function addAssignment($a_node_id, $a_item_id)
        {
                global $ilDB;
                
                // nothing to do, if not both IDs are greater 0
                if ((int) $a_node_id == 0 || (int) $a_item_id == 0)
                {
                        return;
                }
                
                // sanity check: does the node belong to the given taxonomy?
                $set = $ilDB->query("SELECT tax_tree_id FROM tax_tree ".
                        " WHERE child = ".$ilDB->quote($a_node_id, "integer")
                        );
                $rec = $ilDB->fetchAssoc($set);
                if ($rec["tax_tree_id"] != $this->getTaxonomyId())
                {
                        throw new ilTaxonomyException('addAssignment: Node ID does not belong to current taxonomy.');
                }
                
                $ilDB->replace("tax_node_assignment",
                        array(
                                "node_id" => array("integer", $a_node_id),
                                "component" => array("text", $this->getComponentId()),
                                "item_type" => array("text", $this->getItemType()),
                                "item_id" => array("integer", $a_item_id)
                                ),
                        array()
                        );
        }
        
        function deleteAssignmentsOfItem($a_item_id)
        {
                global $ilDB;

                $ilDB->manipulate("DELETE FROM tax_node_assignment WHERE ".
                        " component = ".$ilDB->quote($this->getComponentId(), "text").
                        " AND item_type = ".$ilDB->quote($this->getItemType(), "text").
                        " AND item_id = ".$ilDB->quote($a_item_id, "integer")
                        );
        }

        static function deleteAssignmentsOfNode($a_node_id)
        {
                global $ilDB;

                $ilDB->manipulate("DELETE FROM tax_node_assignment WHERE ".
                        " node_id = ".$ilDB->quote($a_node_id, "integer"));
        }
        
}

?>