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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* Functionality for the navigation tree in the left frame
*
* @package PhpMyAdmin-Navigation
*/
if (! defined('PHPMYADMIN')) {
exit;
}
/**
* The Node is the building block for the collapsible navigation tree
*
* @package PhpMyAdmin-Navigation
*/
class Node
{
/**
* @var int Defines a possible node type
*/
const CONTAINER = 0;
/**
* @var int Defines a possible node type
*/
const OBJECT = 1;
/**
* @var string A non-unique identifier for the node
* This may be trimmed when grouping nodes
*/
public $name = "";
/**
* @var string A non-unique identifier for the node
* This will never change after being assigned
*/
public $real_name = "";
/**
* @var int May be one of CONTAINER or OBJECT
*/
public $type = Node::OBJECT;
/**
* @var bool Whether this object has been created while grouping nodes
* Only relevant if the node is of type CONTAINER
*/
public $is_group;
/**
* @var bool Whether to add a "display: none;" CSS
* rule to the node when rendering it
*/
public $visible = false;
/**
* @var Node A reference to the parent object of
* this node, NULL for the root node.
*/
public $parent;
/**
* @var Node[] An array of Node objects that are
* direct children of this node
*/
public $children = array();
/**
* @var Mixed A string used to group nodes, or an array of strings
* Only relevant if the node is of type CONTAINER
*/
public $separator = '';
/**
* @var int How many time to recursively apply the grouping function
* Only relevant if the node is of type CONTAINER
*/
public $separator_depth = 1;
/**
* @var string An IMG tag, used when rendering the node
*/
public $icon;
/**
* @var Array An array of A tags, used when rendering the node
* The indexes in the array may be 'icon' and 'text'
*/
public $links;
/**
* @var string HTML title
*/
public $title;
/**
* @var string Extra CSS classes for the node
*/
public $classes = '';
/**
* @var bool Whether this node is a link for creating new objects
*/
public $isNew = false;
/**
* @var int The position for the pagination of
* the branch at the second level of the tree
*/
public $pos2 = 0;
/**
* @var int The position for the pagination of
* the branch at the third level of the tree
*/
public $pos3 = 0;
/**
* Initialises the class by setting the mandatory variables
*
* @param string $name An identifier for the new node
* @param int $type Type of node, may be one of CONTAINER or OBJECT
* @param bool $is_group Whether this object has been created
* while grouping nodes
*/
public function __construct($name, $type = Node::OBJECT, $is_group = false)
{
if (! empty($name)) {
$this->name = $name;
$this->real_name = $name;
}
if ($type === Node::CONTAINER) {
$this->type = Node::CONTAINER;
}
$this->is_group = (bool)$is_group;
}
/**
* Adds a child node to this node
*
* @param Node $child A child node
*
* @return void
*/
public function addChild($child)
{
$this->children[] = $child;
$child->parent = $this;
}
/**
* Returns a child node given it's name
*
* @param string $name The name of requested child
* @param bool $real_name Whether to use the "real_name"
* instead of "name" in comparisons
*
* @return false|Node The requested child node or false,
* if the requested node cannot be found
*/
public function getChild($name, $real_name = false)
{
if ($real_name) {
foreach ($this->children as $child) {
if ($child->real_name == $name) {
return $child;
}
}
} else {
foreach ($this->children as $child) {
if ($child->name == $name) {
return $child;
}
}
}
return false;
}
/**
* Removes a child node from this node
*
* @param string $name The name of child to be removed
*
* @return void
*/
public function removeChild($name)
{
foreach ($this->children as $key => $child) {
if ($child->name == $name) {
unset($this->children[$key]);
break;
}
}
}
/**
* Retrieves the parents for a node
*
* @param bool $self Whether to include the Node itself in the results
* @param bool $containers Whether to include nodes of type CONTAINER
* @param bool $groups Whether to include nodes which have $group == true
*
* @return array An array of parent Nodes
*/
public function parents($self = false, $containers = false, $groups = false)
{
$parents = array();
if ($self
&& ($this->type != Node::CONTAINER || $containers)
&& (!$this->is_group || $groups)
) {
$parents[] = $this;
}
$parent = $this->parent;
while (isset($parent)) {
if (($parent->type != Node::CONTAINER || $containers)
&& (!$parent->is_group || $groups)
) {
$parents[] = $parent;
}
$parent = $parent->parent;
}
return $parents;
}
/**
* Returns the actual parent of a node. If used twice on an index or columns
* node, it will return the table and database nodes. The names of the returned
* nodes can be used in SQL queries, etc...
*
* @return Node|false
*/
public function realParent()
{
$retval = $this->parents();
if (count($retval) <= 0) {
return false;
}
return $retval[0];
}
/**
* This function checks if the node has children nodes associated with it
*
* @param bool $count_empty_containers Whether to count empty child
* containers as valid children
*
* @return bool Whether the node has child nodes
*/
public function hasChildren($count_empty_containers = true)
{
$retval = false;
if ($count_empty_containers) {
if (count($this->children)) {
$retval = true;
}
} else {
foreach ($this->children as $child) {
if ($child->type == Node::OBJECT || $child->hasChildren(false)) {
$retval = true;
break;
}
}
}
return $retval;
}
/**
* Returns true if the node has some siblings (other nodes on the same tree
* level, in the same branch), false otherwise.
* The only exception is for nodes on
* the third level of the tree (columns and indexes), for which the function
* always returns true. This is because we want to render the containers
* for these nodes
*
* @return bool
*/
public function hasSiblings()
{
$retval = false;
$paths = $this->getPaths();
if (count($paths['aPath_clean']) > 3) {
$retval = true;
return $retval;
}
foreach ($this->parent->children as $child) {
if ($child !== $this
&& ($child->type == Node::OBJECT || $child->hasChildren(false))
) {
$retval = true;
break;
}
}
return $retval;
}
/**
* Returns the number of child nodes that a node has associated with it
*
* @return int The number of children nodes
*/
public function numChildren()
{
$retval = 0;
foreach ($this->children as $child) {
if ($child->type == Node::OBJECT) {
$retval++;
} else {
$retval += $child->numChildren();
}
}
return $retval;
}
/**
* Returns the actual path and the virtual paths for a node
* both as clean arrays and base64 encoded strings
*
* @return array
*/
public function getPaths()
{
$aPath = array();
$aPath_clean = array();
foreach ($this->parents(true, true, false) as $parent) {
$aPath[] = base64_encode($parent->real_name);
$aPath_clean[] = $parent->real_name;
}
$aPath = implode('.', array_reverse($aPath));
$aPath_clean = array_reverse($aPath_clean);
$vPath = array();
$vPath_clean = array();
foreach ($this->parents(true, true, true) as $parent) {
$vPath[] = base64_encode($parent->name);
$vPath_clean[] = $parent->name;
}
$vPath = implode('.', array_reverse($vPath));
$vPath_clean = array_reverse($vPath_clean);
return array(
'aPath' => $aPath,
'aPath_clean' => $aPath_clean,
'vPath' => $vPath,
'vPath_clean' => $vPath_clean
);
}
/**
* Returns the names of children of type $type present inside this container
* This method is overridden by the Node_Database and Node_Table classes
*
* @param string $type The type of item we are looking for
* ('tables', 'views', etc)
* @param int $pos The offset of the list within the results
* @param string $searchClause A string used to filter the results of the query
*
* @return array
*/
public function getData($type, $pos, $searchClause = '')
{
$maxItems = $GLOBALS['cfg']['FirstLevelNavigationItems'];
if (!$GLOBALS['cfg']['NavigationTreeEnableGrouping']
|| !$GLOBALS['cfg']['ShowDatabasesNavigationAsTree']
) {
if (isset($GLOBALS['cfg']['Server']['DisableIS'])
&& ! $GLOBALS['cfg']['Server']['DisableIS']
) {
$query = "SELECT `SCHEMA_NAME` ";
$query .= "FROM `INFORMATION_SCHEMA`.`SCHEMATA` ";
$query .= $this->_getWhereClause('SCHEMA_NAME', $searchClause);
$query .= "ORDER BY `SCHEMA_NAME` ";
$query .= "LIMIT $pos, $maxItems";
$retval = $GLOBALS['dbi']->fetchResult($query);
return $retval;
}
if ($GLOBALS['dbs_to_test'] === false) {
$retval = array();
$query = "SHOW DATABASES ";
$query .= $this->_getWhereClause('Database', $searchClause);
$handle = $GLOBALS['dbi']->tryQuery($query);
if ($handle === false) {
return $retval;
}
$count = 0;
if (!$GLOBALS['dbi']->dataSeek($handle, $pos)) {
return $retval;
}
while ($arr = $GLOBALS['dbi']->fetchArray($handle)) {
if ($count < $maxItems) {
$retval[] = $arr[0];
$count++;
} else {
break;
}
}
return $retval;
}
$retval = array();
$count = 0;
foreach ($this->_getDatabasesToSearch($searchClause) as $db) {
$query = "SHOW DATABASES LIKE '" . $db . "'";
$handle = $GLOBALS['dbi']->tryQuery($query);
if ($handle === false) {
continue;
}
while ($arr = $GLOBALS['dbi']->fetchArray($handle)) {
if ($this->_isHideDb($arr[0])) {
continue;
}
if (in_array($arr[0], $retval)) {
continue;
}
if ($pos <= 0 && $count < $maxItems) {
$retval[] = $arr[0];
$count++;
}
$pos--;
}
}
sort($retval);
return $retval;
}
$dbSeparator = $GLOBALS['cfg']['NavigationTreeDbSeparator'];
if (isset($GLOBALS['cfg']['Server']['DisableIS'])
&& ! $GLOBALS['cfg']['Server']['DisableIS']
) {
$query = "SELECT `SCHEMA_NAME` ";
$query .= "FROM `INFORMATION_SCHEMA`.`SCHEMATA`, ";
$query .= "(";
$query .= "SELECT DB_first_level ";
$query .= "FROM ( ";
$query .= "SELECT DISTINCT SUBSTRING_INDEX(SCHEMA_NAME, ";
$query .= "'$dbSeparator', 1) ";
$query .= "DB_first_level ";
$query .= "FROM INFORMATION_SCHEMA.SCHEMATA ";
$query .= $this->_getWhereClause('SCHEMA_NAME', $searchClause);
$query .= ") t ";
$query .= "ORDER BY DB_first_level ASC ";
$query .= "LIMIT $pos, $maxItems";
$query .= ") t2 ";
$query .= "WHERE 1 = LOCATE(CONCAT(DB_first_level, ";
$query .= "'$dbSeparator'), ";
$query .= "CONCAT(SCHEMA_NAME, ";
$query .= "'$dbSeparator')) ";
$query .= "ORDER BY SCHEMA_NAME ASC";
$retval = $GLOBALS['dbi']->fetchResult($query);
return $retval;
}
if ($GLOBALS['dbs_to_test'] === false) {
$query = "SHOW DATABASES ";
$query .= $this->_getWhereClause('Database', $searchClause);
$handle = $GLOBALS['dbi']->tryQuery($query);
$prefixes = array();
if ($handle !== false) {
$prefixMap = array();
$total = $pos + $maxItems;
while ($arr = $GLOBALS['dbi']->fetchArray($handle)) {
$prefix = strstr($arr[0], $dbSeparator, true);
if ($prefix === false) {
$prefix = $arr[0];
}
$prefixMap[$prefix] = 1;
if (sizeof($prefixMap) == $total) {
break;
}
}
$prefixes = array_slice(array_keys($prefixMap), $pos);
}
$query = "SHOW DATABASES ";
$query .= $this->_getWhereClause('Database', '');
$query .= " AND (";
$subClauses = array();
foreach ($prefixes as $prefix) {
$subClauses[] = " LOCATE('"
. PMA_Util::sqlAddSlashes($prefix) . $dbSeparator . "', "
. "CONCAT(`Database`, '" . $dbSeparator . "')) = 1 ";
}
$query .= implode("OR", $subClauses) . ")";
$retval = $GLOBALS['dbi']->fetchResult($query);
return $retval;
}
$retval = array();
$prefixMap = array();
$total = $pos + $maxItems;
foreach ($this->_getDatabasesToSearch($searchClause) as $db) {
$query = "SHOW DATABASES LIKE '" . $db . "'";
$handle = $GLOBALS['dbi']->tryQuery($query);
if ($handle === false) {
continue;
}
while ($arr = $GLOBALS['dbi']->fetchArray($handle)) {
if ($this->_isHideDb($arr[0])) {
continue;
}
$prefix = strstr($arr[0], $dbSeparator, true);
if ($prefix === false) {
$prefix = $arr[0];
}
$prefixMap[$prefix] = 1;
if (sizeof($prefixMap) == $total) {
break 2;
}
}
}
$prefixes = array_slice(array_keys($prefixMap), $pos);
foreach ($this->_getDatabasesToSearch($searchClause) as $db) {
$query = "SHOW DATABASES LIKE '" . $db . "'";
$handle = $GLOBALS['dbi']->tryQuery($query);
if ($handle === false) {
continue;
}
while ($arr = $GLOBALS['dbi']->fetchArray($handle)) {
if ($this->_isHideDb($arr[0])) {
continue;
}
if (in_array($arr[0], $retval)) {
continue;
}
foreach ($prefixes as $prefix) {
$starts_with = strpos(
$arr[0] . $dbSeparator,
$prefix . $dbSeparator
) === 0;
if ($starts_with) {
$retval[] = $arr[0];
break;
}
}
}
}
sort($retval);
return $retval;
}
/**
* Returns the number of children of type $type present inside this container
* This method is overridden by the Node_Database and Node_Table classes
*
* @param string $type The type of item we are looking for
* ('tables', 'views', etc)
* @param string $searchClause A string used to filter the results of the query
*
* @return int
*/
public function getPresence($type = '', $searchClause = '')
{
if (!$GLOBALS['cfg']['NavigationTreeEnableGrouping']
|| !$GLOBALS['cfg']['ShowDatabasesNavigationAsTree']
) {
if (isset($GLOBALS['cfg']['Server']['DisableIS'])
&& ! $GLOBALS['cfg']['Server']['DisableIS']
) {
$query = "SELECT COUNT(*) ";
$query .= "FROM INFORMATION_SCHEMA.SCHEMATA ";
$query .= $this->_getWhereClause('SCHEMA_NAME', $searchClause);
$retval = (int)$GLOBALS['dbi']->fetchValue($query);
return $retval;
}
if ($GLOBALS['dbs_to_test'] === false) {
$query = "SHOW DATABASES ";
$query .= $this->_getWhereClause('Database', $searchClause);
$retval = $GLOBALS['dbi']->numRows(
$GLOBALS['dbi']->tryQuery($query)
);
return $retval;
}
$retval = 0;
foreach ($this->_getDatabasesToSearch($searchClause) as $db) {
$query = "SHOW DATABASES LIKE '" . $db . "'";
$retval += $GLOBALS['dbi']->numRows(
$GLOBALS['dbi']->tryQuery($query)
);
}
return $retval;
}
$dbSeparator = $GLOBALS['cfg']['NavigationTreeDbSeparator'];
if (! $GLOBALS['cfg']['Server']['DisableIS']) {
$query = "SELECT COUNT(*) ";
$query .= "FROM ( ";
$query .= "SELECT DISTINCT SUBSTRING_INDEX(SCHEMA_NAME, ";
$query .= "'$dbSeparator', 1) ";
$query .= "DB_first_level ";
$query .= "FROM INFORMATION_SCHEMA.SCHEMATA ";
$query .= $this->_getWhereClause('SCHEMA_NAME', $searchClause);
$query .= ") t ";
$retval = (int)$GLOBALS['dbi']->fetchValue($query);
return $retval;
}
if ($GLOBALS['dbs_to_test'] !== false) {
$prefixMap = array();
foreach ($this->_getDatabasesToSearch($searchClause) as $db) {
$query = "SHOW DATABASES LIKE '" . $db . "'";
$handle = $GLOBALS['dbi']->tryQuery($query);
if ($handle === false) {
continue;
}
while ($arr = $GLOBALS['dbi']->fetchArray($handle)) {
if ($this->_isHideDb($arr[0])) {
continue;
}
$prefix = strstr($arr[0], $dbSeparator, true);
if ($prefix === false) {
$prefix = $arr[0];
}
$prefixMap[$prefix] = 1;
}
}
$retval = count($prefixMap);
return $retval;
}
$prefixMap = array();
$query = "SHOW DATABASES ";
$query .= $this->_getWhereClause('Database', $searchClause);
$handle = $GLOBALS['dbi']->tryQuery($query);
if ($handle !== false) {
while ($arr = $GLOBALS['dbi']->fetchArray($handle)) {
$prefix = strstr($arr[0], $dbSeparator, true);
if ($prefix === false) {
$prefix = $arr[0];
}
$prefixMap[$prefix] = 1;
}
}
$retval = count($prefixMap);
return $retval;
}
/**
* Detemines whether a given database should be hidden according to 'hide_db'
*
* @param string $db database name
*
* @return boolean whether to hide
*/
private function _isHideDb($db)
{
if (! empty($GLOBALS['cfg']['Server']['hide_db'])
&& preg_match('/' . $GLOBALS['cfg']['Server']['hide_db'] . '/', $db)
) {
return true;
}
return false;
}
/**
* Get the list of databases for 'SHOW DATABASES LIKE' queries.
* If a search clause is set it gets the highest priority while only_db gets
* the next priority. In case both are empty list of databases determined by
* GRANTs are used
*
* @param string $searchClause search clause
*
* @return array array of databases
*/
private function _getDatabasesToSearch($searchClause)
{
if (! empty($searchClause)) {
$databases = array(
"%" . PMA_Util::sqlAddSlashes($searchClause, true) . "%"
);
} elseif (! empty($GLOBALS['cfg']['Server']['only_db'])) {
$databases = $GLOBALS['cfg']['Server']['only_db'];
} elseif (! empty($GLOBALS['dbs_to_test'])) {
$databases = $GLOBALS['dbs_to_test'];
}
sort($databases);
return $databases;
}
/**
* Returns the WHERE clause depending on the $searchClause parameter
* and the hide_db directive
*
* @param string $columnName Column name of the column having database names
* @param string $searchClause A string used to filter the results of the query
*
* @return string
*/
private function _getWhereClause($columnName, $searchClause = '')
{
$whereClause = "WHERE TRUE ";
if (! empty($searchClause)) {
$whereClause .= "AND " . PMA_Util::backquote($columnName) . " LIKE '%";
$whereClause .= PMA_Util::sqlAddSlashes(
$searchClause, true
);
$whereClause .= "%' ";
}
if (! empty($GLOBALS['cfg']['Server']['hide_db'])) {
$whereClause .= "AND " . PMA_Util::backquote($columnName)
. " NOT REGEXP '" . $GLOBALS['cfg']['Server']['hide_db'] . "' ";
}
if (! empty($GLOBALS['cfg']['Server']['only_db'])) {
if (is_string($GLOBALS['cfg']['Server']['only_db'])) {
$GLOBALS['cfg']['Server']['only_db'] = array(
$GLOBALS['cfg']['Server']['only_db']
);
}
$whereClause .= "AND (";
$subClauses = array();
foreach ($GLOBALS['cfg']['Server']['only_db'] as $each_only_db) {
$subClauses[] = " " . PMA_Util::backquote($columnName) . " LIKE '"
. $each_only_db . "' ";
}
$whereClause .= implode("OR", $subClauses) . ")";
}
return $whereClause;
}
/**
* Returns HTML for control buttons displayed infront of a node
*
* @return String HTML for control buttons
*/
public function getHtmlForControlButtons()
{
return '';
}
/**
* Returns CSS classes for a node
*
* @param boolean $match Whether the node matched loaded tree
*
* @return String with html classes.
*/
public function getCssClasses($match)
{
if (! $GLOBALS['cfg']['NavigationTreeEnableExpansion']
) {
return '';
}
$result = array('expander');
if ($this->is_group || $match) {
$result[] = 'loaded';
}
if ($this->type == Node::CONTAINER) {
$result[] = 'container';
}
return implode(' ', $result);
}
/**
* Returns icon for the node
*
* @param boolean $match Whether the node matched loaded tree
*
* @return String with image name
*/
public function getIcon($match)
{
if (! $GLOBALS['cfg']['NavigationTreeEnableExpansion']
) {
return '';
} elseif ($match && ! $this->is_group) {
$this->visible = true;
return PMA_Util::getImage('b_minus.png');
} else {
return PMA_Util::getImage('b_plus.png', __('Expand/Collapse'));
}
}
/**
* Gets the count of hidden elements for each database
*
* @return array array containing the count of hidden elements for each database
*/
public function getNavigationHidingData()
{
$cfgRelation = PMA_getRelationsParam();
if ($cfgRelation['navwork']) {
$navTable = PMA_Util::backquote($cfgRelation['db'])
. "." . PMA_Util::backquote($cfgRelation['navigationhiding']);
$sqlQuery = "SELECT `db_name`, COUNT(*) AS `count` FROM " . $navTable
. " WHERE `username`='"
. PMA_Util::sqlAddSlashes($GLOBALS['cfg']['Server']['user']) . "'"
. " GROUP BY `db_name`";
$counts = $GLOBALS['dbi']->fetchResult(
$sqlQuery, 'db_name', 'count', $GLOBALS['controllink']
);
return $counts;
}
return null;
}
}
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