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<?php
/* base class with rudimentary SQL generation abilities.
* WARNING: argument is escaped, but $column and $operator are passed unfiltered into SQL */
class Filter
{
/**
* Delimiter for js_selectize filters
*/
const DELIMITER = '~,~';
public $column;
public $operator;
public $argument;
private static $keyCounter = 0;
public static function getNewKey($colname)
{
return $colname . '_' . (self::$keyCounter++);
}
public function __construct($column, $operator, $argument = null)
{
$this->column = trim($column);
$this->operator = trim($operator);
$this->argument = is_array($argument) ? $argument : trim($argument);
}
/* returns a where clause and adds needed operators to the passed array */
public function whereClause(&$args, &$joins)
{
$key = Filter::getNewKey($this->column);
$addendum = '';
/* check if we have to do some parsing*/
if (Page_Statistics::$columns[$this->column]['type'] === 'date') {
$args[$key] = strtotime($this->argument);
} else {
$args[$key] = $this->argument;
if ($this->operator === '~' || $this->operator === '!~') {
$args[$key] = str_replace(array('=', '_', '%', '*', '?'), array('==', '=_', '=%', '%', '_'), $args[$key]);
$addendum = " ESCAPE '='";
}
}
$op = $this->operator;
if ($this->operator == '~') {
$op = 'LIKE';
} elseif ($this->operator == '!~') {
$op = 'NOT LIKE';
}
return $this->column . ' ' . $op . ' :' . $key . $addendum;
}
/* parse a query into an array of filters */
public static function parseQuery($query)
{
$operators = ['<=', '>=', '!=', '!~', '=', '~', '<', '>'];
$filters = [];
if (empty($query))
return $filters;
foreach (explode(self::DELIMITER, $query) as $q) {
$q = trim($q);
if (empty($q))
continue;
// Special case: User pasted UUID, turn into filter
if (preg_match('/^\w{8}-\w{4}-\w{4}-\w{4}-\w{12}$/', $q)) {
$filters[] = new Filter('machineuuid', '=', $q);
continue;
}
// Special case: User pasted IP, turn into filter
if (preg_match('/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/', $q)) {
$filters[] = new Filter('clientip', '=', $q);
continue;
}
/* find position of first operator */
$pos = 10000;
$operator = false;
foreach ($operators as $op) {
$newpos = strpos($q, $op);
if ($newpos > -1 && ($newpos < $pos)) {
$pos = $newpos;
$operator = $op;
}
}
if ($pos == 10000) {
error_log("couldn't find operator in segment " . $q);
/* TODO */
continue;
}
$lhs = trim(substr($q, 0, $pos));
$rhs = trim(substr($q, $pos + strlen($operator)));
if ($lhs === 'gbram') {
$filters[] = new RamGbFilter($operator, $rhs);
} elseif ($lhs === 'runtime') {
$filters[] = new RuntimeFilter($operator, $rhs);
} elseif ($lhs === 'state') {
$filters[] = new StateFilter($operator, $rhs);
} elseif ($lhs === 'hddgb') {
$filters[] = new Id44Filter($operator, $rhs);
} elseif ($lhs === 'location') {
$filters[] = new LocationFilter($operator, $rhs);
} elseif ($lhs === 'subnet') {
$filters[] = new SubnetFilter($operator, $rhs);
} else {
if (array_key_exists($lhs, Page_Statistics::$columns) && Page_Statistics::$columns[$lhs]['column']) {
$filters[] = new Filter($lhs, $operator, $rhs);
} else {
Message::addError('invalid-filter-key', $lhs);
}
}
}
return $filters;
}
}
class RamGbFilter extends Filter
{
public function __construct($operator, $argument)
{
parent::__construct('mbram', $operator, $argument);
}
public function whereClause(&$args, &$joins)
{
global $SIZE_RAM;
$lower = floor(Page_Statistics::findBestValue($SIZE_RAM, (int)$this->argument, false) * 1024 - 100);
$upper = ceil(Page_Statistics::findBestValue($SIZE_RAM, (int)$this->argument, true) * 1024 + 100);
if ($this->operator == '=') {
return " mbram BETWEEN $lower AND $upper";
} elseif ($this->operator == '<') {
return " mbram < $lower";
} elseif ($this->operator == '<=') {
return " mbram <= $upper";
} elseif ($this->operator == '>') {
return " mbram > $upper";
} elseif ($this->operator == '>=') {
return " mbram >= $lower";
} elseif ($this->operator == '!=') {
return " (mbram < $lower OR mbram > $upper)";
} else {
error_log("unimplemented operator in RamGbFilter: $this->operator");
return ' 1';
}
}
}
class RuntimeFilter extends Filter
{
public function __construct($operator, $argument)
{
parent::__construct('lastboot', $operator, $argument);
}
public function whereClause(&$args, &$joins)
{
global $SIZE_RAM;
$upper = time() - (int)$this->argument * 3600;
$lower = $upper - 3600;
$common = "state IN ('OCCUPIED', 'IDLE', 'STANDBY') AND";
if ($this->operator == '=') {
return "$common ({$this->column} BETWEEN $lower AND $upper)";
} elseif ($this->operator == '<') {
return "$common {$this->column} > $upper";
} elseif ($this->operator == '<=') {
return "$common {$this->column} > $lower";
} elseif ($this->operator == '>') {
return "$common {$this->column} < $lower";
} elseif ($this->operator == '>=') {
return "$common {$this->column} < $upper";
} elseif ($this->operator == '!=') {
return "$common ({$this->column} < $lower OR {$this->column} > $upper)";
} else {
error_log("unimplemented operator in RuntimeFilter: $this->operator");
return ' 1';
}
}
}
class Id44Filter extends Filter
{
public function __construct($operator, $argument)
{
parent::__construct('id44mb', $operator, $argument);
}
public function whereClause(&$args, &$joins)
{
global $SIZE_ID44;
if ($this->operator === '=' || $this->operator === '!=') {
$lower = floor(Page_Statistics::findBestValue($SIZE_ID44, $this->argument, false) * 1024 - 100);
$upper = ceil(Page_Statistics::findBestValue($SIZE_ID44, $this->argument, true) * 1024 + 100);
} else {
$lower = $upper = round($this->argument * 1024);
}
if ($this->operator === '=') {
return " id44mb BETWEEN $lower AND $upper";
} elseif ($this->operator === '!=') {
return " id44mb < $lower OR id44mb > $upper";
} elseif ($this->operator === '<=') {
return " id44mb <= $upper";
} elseif ($this->operator === '>=') {
return " id44mb >= $lower";
} elseif ($this->operator === '<') {
return " id44mb < $lower";
} elseif ($this->operator === '>') {
return " id44mb > $upper";
} else {
error_log("unimplemented operator in Id44Filter: $this->operator");
return ' 1';
}
}
}
class StateFilter extends Filter
{
public function __construct($operator, $argument)
{
parent::__construct(null, $operator, $argument);
}
public function whereClause(&$args, &$joins)
{
$map = [ 'on' => ['IDLE', 'OCCUPIED'], 'off' => ['OFFLINE'], 'idle' => ['IDLE'], 'occupied' => ['OCCUPIED'], 'standby' => ['STANDBY'] ];
$neg = $this->operator == '!=' ? 'NOT ' : '';
if (array_key_exists($this->argument, $map)) {
$key = Filter::getNewKey($this->column);
$args[$key] = $map[$this->argument];
return " machine.state $neg IN ( :$key ) ";
} else {
Message::addError('invalid-filter-argument', 'state', $this->argument);
return ' 1';
}
}
}
class LocationFilter extends Filter
{
public function __construct($operator, $argument)
{
parent::__construct('locationid', $operator, $argument);
}
public function whereClause(&$args, &$joins)
{
$recursive = (substr($this->operator, -1) === '~');
$this->operator = str_replace('~', '=', $this->operator);
if (is_array($this->argument)) {
if ($recursive)
Util::traceError('Cannot use ~ operator for location with array');
} else {
settype($this->argument, 'int');
}
$neg = $this->operator === '=' ? '' : 'NOT';
if ($this->argument === 0) {
return "machine.locationid IS $neg NULL";
} else {
$key = Filter::getNewKey($this->column);
if ($recursive) {
$args[$key] = array_keys(Location::getRecursiveFlat($this->argument));
} else {
$args[$key] = $this->argument;
}
return "machine.locationid $neg IN (:$key)";
}
}
}
class SubnetFilter extends Filter
{
public function __construct($operator, $argument)
{
parent::__construct(null, $operator, $argument);
}
public function whereClause(&$args, &$joins)
{
$argument = preg_replace('/[^0-9\.:]/', '', $this->argument);
return " clientip LIKE '$argument%'";
}
}
class IsClientFilter extends Filter
{
public function __construct($argument)
{
parent::__construct(null, null, $argument);
}
public function whereClause(&$args, &$joins)
{
if ($this->argument) {
$joins[] = ' LEFT JOIN runmode USING (machineuuid)';
return "(runmode.isclient <> 0 OR runmode.isclient IS NULL)";
}
$joins[] = ' INNER JOIN runmode USING (machineuuid)';
return "runmode.isclient = 0";
}
}
|
