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<?php |
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namespace Codor\Sniffs\Files; |
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use PHP_CodeSniffer_Sniff; |
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use PHP_CodeSniffer_File; |
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class IndentationLevelSniff implements PHP_CodeSniffer_Sniff |
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{ |
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/** |
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* Indentations cannot be >= to this number. |
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* @var integer |
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*/ |
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public $indentationLimit = 2; |
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/** |
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* The highest indentation level found. |
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* @var integer |
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*/ |
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protected $maxIndentationFound; |
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/** |
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* Returns the token types that this sniff is interested in. |
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* @return array |
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*/ |
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public function register() |
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{ |
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return [T_FUNCTION, T_CLOSURE, T_SWITCH]; |
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} |
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/** |
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* Processes the tokens that this sniff is interested in. |
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* |
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* @param PHP_CodeSniffer_File $phpcsFile The file where the token was found. |
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* @param integer $stackPtr The position in the stack where |
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* the token was found. |
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* @return void |
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*/ |
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public function process(PHP_CodeSniffer_File $phpcsFile, $stackPtr) |
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{ |
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$tokens = $phpcsFile->getTokens(); |
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$token = $tokens[$stackPtr]; |
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$this->maxIndentationFound = 0; |
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// Ignore functions with no body |
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if (isset($token['scope_opener']) === false) { |
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return; |
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} |
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$this->inspectScope($token, $tokens); |
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if ($this->maxIndentationFound <= $this->indentationLimit) { |
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return; |
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} |
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$phpcsFile->addError($this->getErrorMessage(), $stackPtr); |
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} |
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/** |
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* Inspect the tokens in the scope of the provided $token. |
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* @param array $token Token Data. |
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* @param array $tokens Tokens. |
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* @return void |
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*/ |
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protected function inspectScope(array $token, array $tokens) |
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{ |
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$start = $token['scope_opener']; |
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$length = $token['scope_closer'] - $start + 1; |
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$relativeScopeLevel = $tokens[$start]['level']; |
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$scope = array_slice($tokens, $start, $length, true); |
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$scope = $this->removeTokenScopes($scope, 'T_SWITCH'); |
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$this->maxIndentationFound = array_reduce($scope, function ($max, $nestedToken) use ($relativeScopeLevel) { |
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$max = max($max, $nestedToken['level'] - $relativeScopeLevel); |
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return $max; |
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}); |
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} |
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/** |
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* Remove the bodies of given token type from the scope. |
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* @param array $scope |
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* @param string $type |
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* @return array $scope |
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*/ |
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protected function removeTokenScopes(array $scope, $type) |
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{ |
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$typeTokens = array_filter($scope, function ($token) use ($type) { |
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return $token['type'] == $type; |
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}); |
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foreach ($typeTokens as $token) { |
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$range = array_flip(range($token['scope_opener'], $token['scope_closer'])); |
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$scope = array_diff_key($scope, $range); |
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} |
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return $scope; |
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} |
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/** |
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* Produce the error message. |
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* @return string |
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*/ |
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protected function getErrorMessage() |
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{ |
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// Hack to fix the output numbers for the |
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// indentation levels found and the |
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// indentation limit. |
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$indentationFound = $this->maxIndentationFound - 1; |
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$indentationLimit = $this->indentationLimit - 1; |
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return "{$indentationFound} indentation levels found. " . |
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"Maximum of {$indentationLimit} indentation levels allowed."; |
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} |
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} |
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bmitch /
Codor
