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<?php
/**
* Functionality for the navigation tree in the left frame
*/
declare(strict_types=1);
namespace PhpMyAdmin\Navigation\Nodes;
use PhpMyAdmin\DatabaseInterface;
use PhpMyAdmin\Html\Generator;
use PhpMyAdmin\Relation;
use PhpMyAdmin\Util;
use function array_keys;
use function array_reverse;
use function array_slice;
use function base64_encode;
use function count;
use function implode;
use function in_array;
use function is_string;
use function preg_match;
use function sort;
use function strlen;
use function strpos;
use function strstr;
/**
* The Node is the building block for the collapsible navigation tree
*/
class Node
{
public const CONTAINER = 0;
public 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 $realName = '';
/** @var int May be one of CONTAINER or OBJECT */
public $type = self::OBJECT;
/**
* @var bool Whether this object has been created while grouping nodes
* Only relevant if the node is of type CONTAINER
*/
public $isGroup;
/**
* @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 = [];
/**
* @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 $separatorDepth = 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;
/** @var Relation */
protected $relation;
/** @var string $displayName display name for the navigation tree */
public $displayName;
/**
* 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 $isGroup Whether this object has been created
* while grouping nodes
*/
public function __construct($name, $type = self::OBJECT, $isGroup = false)
{
global $dbi;
if (strlen((string) $name)) {
$this->name = $name;
$this->realName = $name;
}
if ($type === self::CONTAINER) {
$this->type = self::CONTAINER;
}
$this->isGroup = (bool) $isGroup;
$this->relation = new Relation($dbi);
}
/**
* Adds a child node to this node
*
* @param Node $child A child node
*/
public function addChild($child): void
{
$this->children[] = $child;
$child->parent = $this;
}
/**
* Returns a child node given it's name
*
* @param string $name The name of requested child
* @param bool $realName Whether to use the "realName"
* instead of "name" in comparisons
*
* @return Node|null The requested child node or null,
* if the requested node cannot be found
*/
public function getChild($name, $realName = false): ?Node
{
if ($realName) {
foreach ($this->children as $child) {
if ($child->realName == $name) {
return $child;
}
}
} else {
foreach ($this->children as $child) {
if ($child->name == $name && $child->isNew === false) {
return $child;
}
}
}
return null;
}
/**
* Removes a child node from this node
*
* @param string $name The name of child to be removed
*/
public function removeChild($name): void
{
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 $group == true
*
* @return Node[] An array of parent Nodes
*/
public function parents($self = false, $containers = false, $groups = false): array
{
$parents = [];
if ($self
&& ($this->type != self::CONTAINER || $containers)
&& (! $this->isGroup || $groups)
) {
$parents[] = $this;
}
$parent = $this->parent;
while ($parent !== null) {
if (($parent->type != self::CONTAINER || $containers)
&& (! $parent->isGroup || $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 $countEmptyContainers Whether to count empty child
* containers as valid children
*
* @return bool Whether the node has child nodes
*/
public function hasChildren($countEmptyContainers = true): bool
{
$retval = false;
if ($countEmptyContainers) {
if (count($this->children)) {
$retval = true;
}
} else {
foreach ($this->children as $child) {
if ($child->type == self::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
*/
public function hasSiblings(): bool
{
$retval = false;
$paths = $this->getPaths();
if (count($paths['aPath_clean']) > 3) {
return true;
}
foreach ($this->parent->children as $child) {
if ($child !== $this
&& ($child->type == self::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(): int
{
$retval = 0;
foreach ($this->children as $child) {
if ($child->type == self::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(): array
{
$aPath = [];
$aPathClean = [];
foreach ($this->parents(true, true, false) as $parent) {
$aPath[] = base64_encode($parent->realName);
$aPathClean[] = $parent->realName;
}
$aPath = implode('.', array_reverse($aPath));
$aPathClean = array_reverse($aPathClean);
$vPath = [];
$vPathClean = [];
foreach ($this->parents(true, true, true) as $parent) {
$vPath[] = base64_encode((string) $parent->name);
$vPathClean[] = $parent->name;
}
$vPath = implode('.', array_reverse($vPath));
$vPathClean = array_reverse($vPathClean);
return [
'aPath' => $aPath,
'aPath_clean' => $aPathClean,
'vPath' => $vPath,
'vPath_clean' => $vPathClean,
];
}
/**
* Returns the names of children of type $type present inside this container
* This method is overridden by the PhpMyAdmin\Navigation\Nodes\NodeDatabase
* and PhpMyAdmin\Navigation\Nodes\NodeTable 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 = '')
{
/** @var DatabaseInterface $dbi */
global $dbi;
$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;
return $dbi->fetchResult($query);
}
if ($GLOBALS['dbs_to_test'] === false) {
$retval = [];
$query = 'SHOW DATABASES ';
$query .= $this->getWhereClause('Database', $searchClause);
$handle = $dbi->tryQuery($query);
if ($handle === false) {
return $retval;
}
$count = 0;
if (! $dbi->dataSeek($handle, $pos)) {
return $retval;
}
while ($arr = $dbi->fetchArray($handle)) {
if ($count >= $maxItems) {
break;
}
$retval[] = $arr[0];
$count++;
}
return $retval;
}
$retval = [];
$count = 0;
foreach ($this->getDatabasesToSearch($searchClause) as $db) {
$query = "SHOW DATABASES LIKE '" . $db . "'";
$handle = $dbi->tryQuery($query);
if ($handle === false) {
continue;
}
while ($arr = $dbi->fetchArray($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 .= "'" . $dbi->escapeString($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 .= $this->getWhereClause('SCHEMA_NAME', $searchClause);
$query .= 'AND 1 = LOCATE(CONCAT(DB_first_level, ';
$query .= "'" . $dbi->escapeString($dbSeparator) . "'), ";
$query .= 'CONCAT(SCHEMA_NAME, ';
$query .= "'" . $dbi->escapeString($dbSeparator) . "')) ";
$query .= 'ORDER BY SCHEMA_NAME ASC';
return $dbi->fetchResult($query);
}
if ($GLOBALS['dbs_to_test'] === false) {
$query = 'SHOW DATABASES ';
$query .= $this->getWhereClause('Database', $searchClause);
$handle = $dbi->tryQuery($query);
$prefixes = [];
if ($handle !== false) {
$prefixMap = [];
$total = $pos + $maxItems;
while ($arr = $dbi->fetchArray($handle)) {
$prefix = strstr($arr[0], $dbSeparator, true);
if ($prefix === false) {
$prefix = $arr[0];
}
$prefixMap[$prefix] = 1;
if (count($prefixMap) == $total) {
break;
}
}
$prefixes = array_slice(array_keys($prefixMap), (int) $pos);
}
$query = 'SHOW DATABASES ';
$query .= $this->getWhereClause('Database', $searchClause);
$query .= 'AND (';
$subClauses = [];
foreach ($prefixes as $prefix) {
$subClauses[] = " LOCATE('"
. $dbi->escapeString((string) $prefix) . $dbSeparator
. "', "
. "CONCAT(`Database`, '" . $dbSeparator . "')) = 1 ";
}
$query .= implode('OR', $subClauses) . ')';
return $dbi->fetchResult($query);
}
$retval = [];
$prefixMap = [];
$total = $pos + $maxItems;
foreach ($this->getDatabasesToSearch($searchClause) as $db) {
$query = "SHOW DATABASES LIKE '" . $db . "'";
$handle = $dbi->tryQuery($query);
if ($handle === false) {
continue;
}
while ($arr = $dbi->fetchArray($handle)) {
if ($this->isHideDb($arr[0])) {
continue;
}
$prefix = strstr($arr[0], $dbSeparator, true);
if ($prefix === false) {
$prefix = $arr[0];
}
$prefixMap[$prefix] = 1;
if (count($prefixMap) == $total) {
break 2;
}
}
}
$prefixes = array_slice(array_keys($prefixMap), $pos);
foreach ($this->getDatabasesToSearch($searchClause) as $db) {
$query = "SHOW DATABASES LIKE '" . $db . "'";
$handle = $dbi->tryQuery($query);
if ($handle === false) {
continue;
}
while ($arr = $dbi->fetchArray($handle)) {
if ($this->isHideDb($arr[0])) {
continue;
}
if (in_array($arr[0], $retval)) {
continue;
}
foreach ($prefixes as $prefix) {
$startsWith = strpos(
$arr[0] . $dbSeparator,
$prefix . $dbSeparator
) === 0;
if ($startsWith) {
$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 PhpMyAdmin\Navigation\Nodes\NodeDatabase
* and PhpMyAdmin\Navigation\Nodes\NodeTable 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 = '')
{
/** @var DatabaseInterface $dbi */
global $dbi;
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);
return (int) $dbi->fetchValue($query);
}
if ($GLOBALS['dbs_to_test'] === false) {
$query = 'SHOW DATABASES ';
$query .= $this->getWhereClause('Database', $searchClause);
return $dbi->numRows(
$dbi->tryQuery($query)
);
}
$retval = 0;
foreach ($this->getDatabasesToSearch($searchClause) as $db) {
$query = "SHOW DATABASES LIKE '" . $db . "'";
$retval += $dbi->numRows(
$dbi->tryQuery($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 ';
return (int) $dbi->fetchValue($query);
}
if ($GLOBALS['dbs_to_test'] !== false) {
$prefixMap = [];
foreach ($this->getDatabasesToSearch($searchClause) as $db) {
$query = "SHOW DATABASES LIKE '" . $db . "'";
$handle = $dbi->tryQuery($query);
if ($handle === false) {
continue;
}
while ($arr = $dbi->fetchArray($handle)) {
if ($this->isHideDb($arr[0])) {
continue;
}
$prefix = strstr($arr[0], $dbSeparator, true);
if ($prefix === false) {
$prefix = $arr[0];
}
$prefixMap[$prefix] = 1;
}
}
return count($prefixMap);
}
$prefixMap = [];
$query = 'SHOW DATABASES ';
$query .= $this->getWhereClause('Database', $searchClause);
$handle = $dbi->tryQuery($query);
if ($handle !== false) {
while ($arr = $dbi->fetchArray($handle)) {
$prefix = strstr($arr[0], $dbSeparator, true);
if ($prefix === false) {
$prefix = $arr[0];
}
$prefixMap[$prefix] = 1;
}
}
return count($prefixMap);
}
/**
* Detemines whether a given database should be hidden according to 'hide_db'
*
* @param string $db database name
*
* @return bool whether to hide
*/
private function isHideDb($db)
{
return ! empty($GLOBALS['cfg']['Server']['hide_db'])
&& preg_match('/' . $GLOBALS['cfg']['Server']['hide_db'] . '/', $db);
}
/**
* 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)
{
/** @var DatabaseInterface $dbi */
global $dbi;
$databases = [];
if (! empty($searchClause)) {
$databases = [
'%' . $dbi->escapeString($searchClause) . '%',
];
} 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 = '')
{
/** @var DatabaseInterface $dbi */
global $dbi;
$whereClause = 'WHERE TRUE ';
if (! empty($searchClause)) {
$whereClause .= 'AND ' . Util::backquote($columnName)
. " LIKE '%";
$whereClause .= $dbi->escapeString($searchClause);
$whereClause .= "%' ";
}
if (! empty($GLOBALS['cfg']['Server']['hide_db'])) {
$whereClause .= 'AND ' . Util::backquote($columnName)
. " NOT REGEXP '"
. $dbi->escapeString($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'] = [
$GLOBALS['cfg']['Server']['only_db'],
];
}
$whereClause .= 'AND (';
$subClauses = [];
foreach ($GLOBALS['cfg']['Server']['only_db'] as $eachOnlyDb) {
$subClauses[] = ' ' . Util::backquote($columnName)
. " LIKE '"
. $dbi->escapeString($eachOnlyDb) . "' ";
}
$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(): string
{
return '';
}
/**
* Returns CSS classes for a node
*
* @param bool $match Whether the node matched loaded tree
*
* @return string with html classes.
*/
public function getCssClasses($match): string
{
if (! $GLOBALS['cfg']['NavigationTreeEnableExpansion']
) {
return '';
}
$result = ['expander'];
if ($this->isGroup || $match) {
$result[] = 'loaded';
}
if ($this->type == self::CONTAINER) {
$result[] = 'container';
}
return implode(' ', $result);
}
/**
* Returns icon for the node
*
* @param bool $match Whether the node matched loaded tree
*
* @return string with image name
*/
public function getIcon($match): string
{
if (! $GLOBALS['cfg']['NavigationTreeEnableExpansion']
) {
return '';
}
if ($match) {
$this->visible = true;
return Generator::getImage('b_minus');
}
return Generator::getImage('b_plus', __('Expand/Collapse'));
}
/**
* Gets the count of hidden elements for each database
*
* @return array|null array containing the count of hidden elements for each database
*/
public function getNavigationHidingData()
{
/** @var DatabaseInterface $dbi */
global $dbi;
$cfgRelation = $this->relation->getRelationsParam();
if ($cfgRelation['navwork']) {
$navTable = Util::backquote($cfgRelation['db'])
. '.' . Util::backquote(
$cfgRelation['navigationhiding']
);
$sqlQuery = 'SELECT `db_name`, COUNT(*) AS `count` FROM ' . $navTable
. " WHERE `username`='"
. $dbi->escapeString(
$GLOBALS['cfg']['Server']['user']
) . "'"
. ' GROUP BY `db_name`';
return $dbi->fetchResult(
$sqlQuery,
'db_name',
'count',
DatabaseInterface::CONNECT_CONTROL
);
}
return null;
}
}
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