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<?php
/*
* This file is part of PhpSpec, A php toolset to drive emergent
* design by specification.
*
* (c) Marcello Duarte <marcello.duarte@gmail.com>
* (c) Konstantin Kudryashov <ever.zet@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace PhpSpec\Util;
use PhpSpec\Exception\Generator\NamedMethodNotFoundException;
use PhpSpec\Exception\Generator\NoMethodFoundInClass;
final class ClassFileAnalyser
{
private $tokenLists = array();
/**
* @param string $class
* @return int
*/
public function getStartLineOfFirstMethod($class)
{
$tokens = $this->getTokensForClass($class);
$index = $this->offsetForDocblock($tokens, $this->findIndexOfFirstMethod($tokens));
return $tokens[$index][2];
}
/**
* @param string $class
* @return int
*/
public function getEndLineOfLastMethod($class)
{
$tokens = $this->getTokensForClass($class);
$index = $this->findEndOfLastMethod($tokens, $this->findIndexOfClassEnd($tokens));
return $tokens[$index][2];
}
/**
* @param string $class
* @return bool
*/
public function classHasMethods($class)
{
foreach ($this->getTokensForClass($class) as $token) {
if (!is_array($token)) {
continue;
}
if ($token[0] === T_FUNCTION) {
return true;
}
}
return false;
}
/**
* @param string $class
* @param string $methodName
* @return int
*/
public function getEndLineOfNamedMethod($class, $methodName)
{
$tokens = $this->getTokensForClass($class);
$index = $this->findIndexOfNamedMethodEnd($tokens, $methodName);
return $tokens[$index][2];
}
/**
* @param array $tokens
* @return int
*/
private function findIndexOfFirstMethod(array $tokens)
{
for ($i = 0, $max = count($tokens); $i < $max; $i++) {
if ($this->tokenIsFunction($tokens[$i])) {
return $i;
}
}
}
/**
* @param array $tokens
* @param int $index
* @return int
*/
private function offsetForDocblock(array $tokens, $index)
{
$allowedTokens = array(
T_FINAL,
T_ABSTRACT,
T_PUBLIC,
T_PRIVATE,
T_PROTECTED,
T_STATIC,
T_WHITESPACE
);
for ($i = $index - 1; $i >= 0; $i--) {
$token = $tokens[$i];
if (!is_array($token)) {
return $index;
}
if (in_array($token[0], $allowedTokens)) {
continue;
}
if ($token[0] === T_DOC_COMMENT) {
return $i;
}
return $index;
}
}
/**
* @param $class
* @return array
*/
private function getTokensForClass($class)
{
$hash = md5($class);
if (!in_array($hash, $this->tokenLists)) {
$this->tokenLists[$hash] = token_get_all($class);
}
return $this->tokenLists[$hash];
}
/**
* @param array $tokens
* @param string $methodName
* @return int
*/
private function findIndexOfNamedMethodEnd(array $tokens, $methodName)
{
$index = $this->findIndexOfNamedMethod($tokens, $methodName);
return $this->findIndexOfMethodOrClassEnd($tokens, $index);
}
/**
* @param array $tokens
* @param string $methodName
* @return int
* @throws NamedMethodNotFoundException
*/
private function findIndexOfNamedMethod(array $tokens, $methodName)
{
$searching = false;
for ($i = 0, $max = count($tokens); $i < $max; $i++) {
$token = $tokens[$i];
if (!is_array($token)) {
continue;
}
if ($token[0] === T_FUNCTION) {
$searching = true;
}
if (!$searching) {
continue;
}
if ($token[0] === T_STRING) {
if ($token[1] === $methodName) {
return $i;
}
$searching = false;
}
}
throw new NamedMethodNotFoundException('Target method not found');
}
/**
* @param array $tokens
* @param int $index
* @return int
*/
private function findIndexOfMethodOrClassEnd(array $tokens, $index)
{
$braceCount = 0;
for ($i = $index, $max = count($tokens); $i < $max; $i++) {
$token = $tokens[$i];
if ('{' === $token || $this->isSpecialBraceToken($token)) {
$braceCount++;
continue;
}
if ('}' === $token) {
$braceCount--;
if ($braceCount === 0) {
return $i + 1;
}
}
}
}
private function isSpecialBraceToken($token)
{
if (!is_array($token)) {
return false;
}
return $token[1] === "{";
}
/**
* @param mixed $token
* @return bool
*/
private function tokenIsFunction($token)
{
return is_array($token) && $token[0] === T_FUNCTION;
}
/**
* @param array $tokens
* @return int
*/
private function findIndexOfClassEnd(array $tokens)
{
$classTokens = array_filter($tokens, function ($token) {
return is_array($token) && $token[0] === T_CLASS;
});
$classTokenIndex = key($classTokens);
return $this->findIndexOfMethodOrClassEnd($tokens, $classTokenIndex) - 1;
}
/**
* @param array $tokens
* @param int $index
* @return int
*/
public function findEndOfLastMethod(array $tokens, $index)
{
for ($i = $index - 1; $i > 0; $i--) {
if ($tokens[$i] == "}") {
return $i + 1;
}
}
throw new NoMethodFoundInClass();
}
}