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Current File : /var/www/ecommerce/vendor/friendsofphp/php-cs-fixer/src/Fixer/Whitespace/NoExtraBlankLinesFixer.php
<?php

declare(strict_types=1);

/*
 * This file is part of PHP CS Fixer.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *     Dariusz Rumiński <dariusz.ruminski@gmail.com>
 *
 * This source file is subject to the MIT license that is bundled
 * with this source code in the file LICENSE.
 */

namespace PhpCsFixer\Fixer\Whitespace;

use PhpCsFixer\AbstractFixer;
use PhpCsFixer\Fixer\ConfigurableFixerInterface;
use PhpCsFixer\Fixer\WhitespacesAwareFixerInterface;
use PhpCsFixer\FixerConfiguration\AllowedValueSubset;
use PhpCsFixer\FixerConfiguration\FixerConfigurationResolver;
use PhpCsFixer\FixerConfiguration\FixerConfigurationResolverInterface;
use PhpCsFixer\FixerConfiguration\FixerOptionBuilder;
use PhpCsFixer\FixerDefinition\CodeSample;
use PhpCsFixer\FixerDefinition\FixerDefinition;
use PhpCsFixer\FixerDefinition\FixerDefinitionInterface;
use PhpCsFixer\Preg;
use PhpCsFixer\Tokenizer\CT;
use PhpCsFixer\Tokenizer\Token;
use PhpCsFixer\Tokenizer\Tokens;
use PhpCsFixer\Tokenizer\TokensAnalyzer;
use PhpCsFixer\Utils;

/**
 * @author Dariusz Rumiński <dariusz.ruminski@gmail.com>
 */
final class NoExtraBlankLinesFixer extends AbstractFixer implements ConfigurableFixerInterface, WhitespacesAwareFixerInterface
{
    /**
     * @var string[]
     */
    private static $availableTokens = [
        'break',
        'case',
        'continue',
        'curly_brace_block',
        'default',
        'extra',
        'parenthesis_brace_block',
        'return',
        'square_brace_block',
        'switch',
        'throw',
        'use',
        'use_trait',
    ];

    /**
     * @var array<int, string> key is token id, value is name of callback
     */
    private $tokenKindCallbackMap;

    /**
     * @var array<string, string> token prototype, value is name of callback
     */
    private $tokenEqualsMap;

    /**
     * @var Tokens
     */
    private $tokens;

    /**
     * @var TokensAnalyzer
     */
    private $tokensAnalyzer;

    /**
     * {@inheritdoc}
     */
    public function configure(array $configuration): void
    {
        if (isset($configuration['tokens']) && \in_array('use_trait', $configuration['tokens'], true)) {
            Utils::triggerDeprecation(new \RuntimeException('Option "tokens: use_trait" used in `no_extra_blank_lines` rule is deprecated, use the rule `class_attributes_separation` with `elements: trait_import` instead.'));
        }

        parent::configure($configuration);

        static $reprToTokenMap = [
            'break' => T_BREAK,
            'case' => T_CASE,
            'continue' => T_CONTINUE,
            'curly_brace_block' => '{',
            'default' => T_DEFAULT,
            'extra' => T_WHITESPACE,
            'parenthesis_brace_block' => '(',
            'return' => T_RETURN,
            'square_brace_block' => CT::T_ARRAY_SQUARE_BRACE_OPEN,
            'switch' => T_SWITCH,
            'throw' => T_THROW,
            'use' => T_USE,
            'use_trait' => CT::T_USE_TRAIT,
        ];

        static $tokenKindCallbackMap = [
            T_BREAK => 'fixAfterToken',
            T_CASE => 'fixAfterToken',
            T_CONTINUE => 'fixAfterToken',
            T_DEFAULT => 'fixAfterToken',
            T_RETURN => 'fixAfterToken',
            T_SWITCH => 'fixAfterToken',
            T_THROW => 'fixAfterThrowToken',
            T_USE => 'removeBetweenUse',
            T_WHITESPACE => 'removeMultipleBlankLines',
            CT::T_USE_TRAIT => 'removeBetweenUse',
            CT::T_ARRAY_SQUARE_BRACE_OPEN => 'fixStructureOpenCloseIfMultiLine', // typeless '[' tokens should not be fixed (too rare)
        ];

        static $tokenEqualsMap = [
            '{' => 'fixStructureOpenCloseIfMultiLine', // i.e. not: CT::T_ARRAY_INDEX_CURLY_BRACE_OPEN
            '(' => 'fixStructureOpenCloseIfMultiLine', // i.e. not: CT::T_BRACE_CLASS_INSTANTIATION_OPEN
        ];

        $tokensAssoc = array_flip(array_intersect_key($reprToTokenMap, array_flip($this->configuration['tokens'])));

        $this->tokenKindCallbackMap = array_intersect_key($tokenKindCallbackMap, $tokensAssoc);
        $this->tokenEqualsMap = array_intersect_key($tokenEqualsMap, $tokensAssoc);
    }

    /**
     * {@inheritdoc}
     */
    public function getDefinition(): FixerDefinitionInterface
    {
        return new FixerDefinition(
            'Removes extra blank lines and/or blank lines following configuration.',
            [
                new CodeSample(
                    '<?php

$foo = array("foo");


$bar = "bar";
'
                ),
                new CodeSample(
                    '<?php

switch ($foo) {
    case 41:
        echo "foo";
        break;

    case 42:
        break;
}
',
                    ['tokens' => ['break']]
                ),
                new CodeSample(
                    '<?php

for ($i = 0; $i < 9000; ++$i) {
    if (true) {
        continue;

    }
}
',
                    ['tokens' => ['continue']]
                ),
                new CodeSample(
                    '<?php

for ($i = 0; $i < 9000; ++$i) {

    echo $i;

}
',
                    ['tokens' => ['curly_brace_block']]
                ),
                new CodeSample(
                    '<?php

$foo = array("foo");


$bar = "bar";
',
                    ['tokens' => ['extra']]
                ),
                new CodeSample(
                    '<?php

$foo = array(

    "foo"

);
',
                    ['tokens' => ['parenthesis_brace_block']]
                ),
                new CodeSample(
                    '<?php

function foo($bar)
{
    return $bar;

}
',
                    ['tokens' => ['return']]
                ),
                new CodeSample(
                    '<?php

$foo = [

    "foo"

];
',
                    ['tokens' => ['square_brace_block']]
                ),
                new CodeSample(
                    '<?php

function foo($bar)
{
    throw new \Exception("Hello!");

}
',
                    ['tokens' => ['throw']]
                ),
                new CodeSample(
                    '<?php

namespace Foo;

use Bar\Baz;

use Baz\Bar;

class Bar
{
}
',
                    ['tokens' => ['use']]
                ),
                new CodeSample(
                    '<?php
switch($a) {

    case 1:

    default:

        echo 3;
}
',
                    ['tokens' => ['switch', 'case', 'default']]
                ),
            ]
        );
    }

    /**
     * {@inheritdoc}
     *
     * Must run before BlankLineBeforeStatementFixer.
     * Must run after ClassAttributesSeparationFixer, CombineConsecutiveUnsetsFixer, EmptyLoopBodyFixer, EmptyLoopConditionFixer, FunctionToConstantFixer, ModernizeStrposFixer, NoEmptyCommentFixer, NoEmptyPhpdocFixer, NoEmptyStatementFixer, NoUnusedImportsFixer, NoUselessElseFixer, NoUselessReturnFixer, NoUselessSprintfFixer, StringLengthToEmptyFixer.
     */
    public function getPriority(): int
    {
        return -20;
    }

    /**
     * {@inheritdoc}
     */
    public function isCandidate(Tokens $tokens): bool
    {
        return true;
    }

    /**
     * {@inheritdoc}
     */
    protected function applyFix(\SplFileInfo $file, Tokens $tokens): void
    {
        $this->tokens = $tokens;
        $this->tokensAnalyzer = new TokensAnalyzer($this->tokens);
        for ($index = $tokens->getSize() - 1; $index > 0; --$index) {
            $this->fixByToken($tokens[$index], $index);
        }
    }

    /**
     * {@inheritdoc}
     */
    protected function createConfigurationDefinition(): FixerConfigurationResolverInterface
    {
        return new FixerConfigurationResolver([
            (new FixerOptionBuilder('tokens', 'List of tokens to fix.'))
                ->setAllowedTypes(['array'])
                ->setAllowedValues([new AllowedValueSubset(self::$availableTokens)])
                ->setDefault(['extra'])
                ->getOption(),
        ]);
    }

    private function fixByToken(Token $token, int $index): void
    {
        foreach ($this->tokenKindCallbackMap as $kind => $callback) {
            if (!$token->isGivenKind($kind)) {
                continue;
            }

            $this->{$callback}($index);

            return;
        }

        foreach ($this->tokenEqualsMap as $equals => $callback) {
            if (!$token->equals($equals)) {
                continue;
            }

            $this->{$callback}($index);

            return;
        }
    }

    private function removeBetweenUse(int $index): void
    {
        $next = $this->tokens->getNextTokenOfKind($index, [';', [T_CLOSE_TAG]]);
        if (null === $next || $this->tokens[$next]->isGivenKind(T_CLOSE_TAG)) {
            return;
        }

        $nextUseCandidate = $this->tokens->getNextMeaningfulToken($next);
        if (null === $nextUseCandidate || !$this->tokens[$nextUseCandidate]->isGivenKind($this->tokens[$index]->getId()) || !$this->containsLinebreak($index, $nextUseCandidate)) {
            return;
        }

        $this->removeEmptyLinesAfterLineWithTokenAt($next);
    }

    private function removeMultipleBlankLines(int $index): void
    {
        $expected = $this->tokens[$index - 1]->isGivenKind(T_OPEN_TAG) && 1 === Preg::match('/\R$/', $this->tokens[$index - 1]->getContent()) ? 1 : 2;

        $parts = Preg::split('/(.*\R)/', $this->tokens[$index]->getContent(), -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
        $count = \count($parts);

        if ($count > $expected) {
            $this->tokens[$index] = new Token([T_WHITESPACE, implode('', \array_slice($parts, 0, $expected)).rtrim($parts[$count - 1], "\r\n")]);
        }
    }

    private function fixAfterToken(int $index): void
    {
        for ($i = $index - 1; $i > 0; --$i) {
            if ($this->tokens[$i]->isGivenKind(T_FUNCTION) && $this->tokensAnalyzer->isLambda($i)) {
                return;
            }

            if ($this->tokens[$i]->isGivenKind(T_CLASS) && $this->tokensAnalyzer->isAnonymousClass($i)) {
                return;
            }

            if ($this->tokens[$i]->isWhitespace() && str_contains($this->tokens[$i]->getContent(), "\n")) {
                break;
            }
        }

        $this->removeEmptyLinesAfterLineWithTokenAt($index);
    }

    private function fixAfterThrowToken(int $index): void
    {
        if ($this->tokens[$this->tokens->getPrevMeaningfulToken($index)]->equalsAny([';', '{', '}', ':', [T_OPEN_TAG]])) {
            $this->fixAfterToken($index);
        }
    }

    /**
     * Remove white line(s) after the index of a block type,
     * but only if the block is not on one line.
     *
     * @param int $index body start
     */
    private function fixStructureOpenCloseIfMultiLine(int $index): void
    {
        $blockTypeInfo = Tokens::detectBlockType($this->tokens[$index]);
        $bodyEnd = $this->tokens->findBlockEnd($blockTypeInfo['type'], $index);

        for ($i = $bodyEnd - 1; $i >= $index; --$i) {
            if (str_contains($this->tokens[$i]->getContent(), "\n")) {
                $this->removeEmptyLinesAfterLineWithTokenAt($i);
                $this->removeEmptyLinesAfterLineWithTokenAt($index);

                break;
            }
        }
    }

    private function removeEmptyLinesAfterLineWithTokenAt(int $index): void
    {
        // find the line break
        $tokenCount = \count($this->tokens);
        for ($end = $index; $end < $tokenCount; ++$end) {
            if (
                $this->tokens[$end]->equals('}')
                || str_contains($this->tokens[$end]->getContent(), "\n")
            ) {
                break;
            }
        }

        if ($end === $tokenCount) {
            return; // not found, early return
        }

        $ending = $this->whitespacesConfig->getLineEnding();

        for ($i = $end; $i < $tokenCount && $this->tokens[$i]->isWhitespace(); ++$i) {
            $content = $this->tokens[$i]->getContent();
            if (substr_count($content, "\n") < 1) {
                continue;
            }

            $pos = strrpos($content, "\n");
            if ($pos + 2 <= \strlen($content)) { // preserve indenting where possible
                $newContent = $ending.substr($content, $pos + 1);
            } else {
                $newContent = $ending;
            }

            $this->tokens[$i] = new Token([T_WHITESPACE, $newContent]);
        }
    }

    private function containsLinebreak(int $startIndex, int $endIndex): bool
    {
        for ($i = $endIndex; $i > $startIndex; --$i) {
            if (Preg::match('/\R/', $this->tokens[$i]->getContent())) {
                return true;
            }
        }

        return false;
    }
}

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