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<?php
/**********************************************************\
| This script converts the categories table to the new |
| format. |
\***********************************************************/
function rebuild_tree($parent, $left, $pr) {
global $db;
// the right value of this node is the left value + 1
$right = $left+1;
// get all children of this node
$result = $db->query('SELECT category_id FROM {list_category} WHERE parent_id = ? AND project_id = ?', array($parent, $pr));
while ($row = $db->fetchRow($result)) {
// recursive execution of this function for each
// child of this node
// $right is the current right value, which is
// incremented by the rebuild_tree function
$right = rebuild_tree($row['category_id'], $right, $pr);
}
// we've got the left value, and now that we've processed
// the children of this node we also know the right value
$db->query('UPDATE {list_category} SET lft= ?, rgt= ? WHERE category_id = ?', array($left, $right, $parent));
$sql = $db->query('SELECT * FROM {list_category} WHERE category_id = ? OR project_id=? AND parent_id=-1', array($parent, $pr));
if (!$db->countRows($sql)) {
$db->query('INSERT INTO {list_category} (project_id, lft, rgt, category_name, parent_id) VALUES(?,?,?,?,-1)',
array($pr,$left,$right,'root'));
}
// return the right value of this node + 1
return $right+1;
}
$projects = $db->query('SELECT project_id FROM {projects}');
// Global project
rebuild_tree(0, 1, 0);
while ($pr = $db->fetchRow($projects)) {
rebuild_tree(0, 1, $pr['project_id']);
}
?>
|
