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<?php
/*
* This file is part of Psy Shell.
*
* (c) 2012-2015 Justin Hileman
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Psy\Formatter;
use Psy\Reflection\ReflectionConstant;
use Psy\Util\Json;
use Symfony\Component\Console\Formatter\OutputFormatter;
/**
* An abstract representation of a function, class or property signature.
*/
class SignatureFormatter implements Formatter
{
/**
* Format a signature for the given reflector.
*
* Defers to subclasses to do the actual formatting.
*
* @param \Reflector $reflector
*
* @return string Formatted signature.
*/
public static function format(\Reflector $reflector)
{
switch (true) {
case $reflector instanceof \ReflectionFunction:
return self::formatFunction($reflector);
// this case also covers \ReflectionObject:
case $reflector instanceof \ReflectionClass:
return self::formatClass($reflector);
case $reflector instanceof ReflectionConstant:
return self::formatConstant($reflector);
case $reflector instanceof \ReflectionMethod:
return self::formatMethod($reflector);
case $reflector instanceof \ReflectionProperty:
return self::formatProperty($reflector);
default:
throw new \InvalidArgumentException('Unexpected Reflector class: ' . get_class($reflector));
}
}
/**
* Print the signature name.
*
* @param \Reflector $reflector
*
* @return string Formatted name.
*/
public static function formatName(\Reflector $reflector)
{
return $reflector->getName();
}
/**
* Print the method, property or class modifiers.
*
* Technically this should be a trait. Can't wait for 5.4 :)
*
* @param \Reflector $reflector
*
* @return string Formatted modifiers.
*/
private static function formatModifiers(\Reflector $reflector)
{
return implode(' ', array_map(function ($modifier) {
return sprintf('<keyword>%s</keyword>', $modifier);
}, \Reflection::getModifierNames($reflector->getModifiers())));
}
/**
* Format a class signature.
*
* @param \ReflectionClass $reflector
*
* @return string Formatted signature.
*/
private static function formatClass(\ReflectionClass $reflector)
{
$chunks = array();
if ($modifiers = self::formatModifiers($reflector)) {
$chunks[] = $modifiers;
}
if (version_compare(PHP_VERSION, '5.4', '>=') && $reflector->isTrait()) {
$chunks[] = 'trait';
} else {
$chunks[] = $reflector->isInterface() ? 'interface' : 'class';
}
$chunks[] = sprintf('<class>%s</class>', self::formatName($reflector));
if ($parent = $reflector->getParentClass()) {
$chunks[] = 'extends';
$chunks[] = sprintf('<class>%s</class>', $parent->getName());
}
$interfaces = $reflector->getInterfaceNames();
if (!empty($interfaces)) {
sort($interfaces);
$chunks[] = 'implements';
$chunks[] = implode(', ', array_map(function ($name) {
return sprintf('<class>%s</class>', $name);
}, $interfaces));
}
return implode(' ', $chunks);
}
/**
* Format a constant signature.
*
* @param ReflectionConstant $reflector
*
* @return string Formatted signature.
*/
private static function formatConstant(ReflectionConstant $reflector)
{
$value = $reflector->getValue();
$style = self::getTypeStyle($value);
return sprintf(
'<keyword>const</keyword> <const>%s</const> = <%s>%s</%s>',
self::formatName($reflector),
$style,
OutputFormatter::escape(Json::encode($value)),
$style
);
}
/**
* Helper for getting output style for a given value's type.
*
* @param mixed $value
*
* @return string
*/
private static function getTypeStyle($value)
{
if (is_int($value) || is_float($value)) {
return 'number';
} elseif (is_string($value)) {
return 'string';
} elseif (is_bool($value) || is_null($value)) {
return 'bool';
} else {
return 'strong';
}
}
/**
* Format a property signature.
*
* @param \ReflectionProperty $reflector
*
* @return string Formatted signature.
*/
private static function formatProperty(\ReflectionProperty $reflector)
{
return sprintf(
'%s <strong>$%s</strong>',
self::formatModifiers($reflector),
$reflector->getName()
);
}
/**
* Format a function signature.
*
* @param \ReflectionFunction $reflector
*
* @return string Formatted signature.
*/
private static function formatFunction(\ReflectionFunctionAbstract $reflector)
{
return sprintf(
'<keyword>function</keyword> %s<function>%s</function>(%s)',
$reflector->returnsReference() ? '&' : '',
self::formatName($reflector),
implode(', ', self::formatFunctionParams($reflector))
);
}
/**
* Format a method signature.
*
* @param \ReflectionMethod $reflector
*
* @return string Formatted signature.
*/
private static function formatMethod(\ReflectionMethod $reflector)
{
return sprintf(
'%s %s',
self::formatModifiers($reflector),
self::formatFunction($reflector)
);
}
/**
* Print the function params.
*
* @param \ReflectionFunctionAbstract $reflector
*
* @return string
*/
private static function formatFunctionParams(\ReflectionFunctionAbstract $reflector)
{
$params = array();
foreach ($reflector->getParameters() as $param) {
$hint = '';
try {
if ($param->isArray()) {
$hint = '<keyword>array</keyword> ';
} elseif ($class = $param->getClass()) {
$hint = sprintf('<class>%s</class> ', $class->getName());
}
} catch (\Exception $e) {
// sometimes we just don't know...
// bad class names, or autoloaded classes that haven't been loaded yet, or whathaveyou.
// come to think of it, the only time I've seen this is with the intl extension.
// Hax: we'll try to extract it :P
$chunks = explode('$' . $param->getName(), (string) $param);
$chunks = explode(' ', trim($chunks[0]));
$guess = end($chunks);
$hint = sprintf('<urgent>%s</urgent> ', $guess);
}
if ($param->isOptional()) {
if (!$param->isDefaultValueAvailable()) {
$value = 'unknown';
$typeStyle = 'urgent';
} else {
$value = $param->getDefaultValue();
$typeStyle = self::getTypeStyle($value);
$value = is_array($value) ? 'array()' : is_null($value) ? 'null' : var_export($value, true);
}
$default = sprintf(' = <%s>%s</%s>', $typeStyle, OutputFormatter::escape($value), $typeStyle);
} else {
$default = '';
}
$params[] = sprintf(
'%s%s<strong>$%s</strong>%s',
$param->isPassedByReference() ? '&' : '',
$hint,
$param->getName(),
$default
);
}
return $params;
}
}