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<?php
namespace ipl\Web\Filter;
use InvalidArgumentException;
use ipl\Stdlib\Filter;
final class QueryString
{
/** @var string Emitted for every completely parsed condition */
const ON_CONDITION = Parser::ON_CONDITION;
/** @var string Emitted for every completely parsed chain */
const ON_CHAIN = Parser::ON_CHAIN;
/**
* This class is only a factory / helper
*/
private function __construct()
{
}
/**
* Derive a rule from the given query string
*
* @param string $string
*
* @return Parser
*/
public static function fromString($string)
{
return new Parser($string);
}
/**
* Derive a rule from the given query string
*
* @param string $string
*
* @return Filter\Rule
*/
public static function parse($string)
{
return (new Parser($string))->parse();
}
/**
* Assemble a query string for the given rule
*
* @param Filter\Rule $rule
*
* @return string
*/
public static function render(Filter\Rule $rule)
{
return (new Renderer($rule))->render();
}
/**
* Get the symbol associated with the given rule
*
* @param Filter\Rule $rule
*
* @return string
*/
public static function getRuleSymbol(Filter\Rule $rule)
{
switch (true) {
case $rule instanceof Filter\Unlike:
return '!~';
case $rule instanceof Filter\Unequal:
return '!=';
case $rule instanceof Filter\Like:
return '~';
case $rule instanceof Filter\Equal:
return '=';
case $rule instanceof Filter\GreaterThan:
return '>';
case $rule instanceof Filter\LessThan:
return '<';
case $rule instanceof Filter\GreaterThanOrEqual:
return '>=';
case $rule instanceof Filter\LessThanOrEqual:
return '<=';
case $rule instanceof Filter\All:
return '&';
case $rule instanceof Filter\Any:
case $rule instanceof Filter\None:
return '|';
default:
throw new InvalidArgumentException('Unknown rule type provided');
}
}
}
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