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<?php |
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namespace Karma\Formatters; |
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use Karma\Formatter; |
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class Rules implements Formatter |
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{ |
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private |
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$rules; |
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public function __construct(array $rules) |
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{ |
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$this->convertRules($rules); |
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} |
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private function getSpecialValuesMappingTable() |
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{ |
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return array( |
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'<true>' => true, |
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'<false>' => false, |
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'<null>' => null, |
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'<string>' => function($value) { |
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return is_string($value); |
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} |
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); |
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} |
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private function convertRules(array $rules) |
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{ |
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$this->rules = array(); |
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$mapping = $this->getSpecialValuesMappingTable(); |
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foreach($rules as $value => $result) |
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{ |
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$value = trim($value); |
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if(is_string($value) && array_key_exists($value, $mapping)) |
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{ |
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$result = $this->handleStringFormatting($value, $result); |
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$value = $mapping[$value]; |
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} |
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$this->rules[] = array($value, $result); |
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} |
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} |
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private function handleStringFormatting($value, $result) |
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{ |
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if($value === '<string>') |
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{ |
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$result = function ($value) use ($result) { |
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return str_replace('<string>', $value, $result); |
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}; |
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} |
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return $result; |
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} |
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public function format($value) |
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{ |
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foreach($this->rules as $rule) |
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{ |
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list($condition, $result) = $rule; |
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if($this->isRuleMatches($condition, $value)) |
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{ |
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return $this->applyFormattingRule($result, $value); |
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} |
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} |
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return $value; |
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} |
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private function isRuleMatches($condition, $value) |
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{ |
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$hasMatched = ($condition === $value); |
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if($condition instanceof \Closure) |
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{ |
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$hasMatched = $condition($value); |
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} |
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return $hasMatched; |
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} |
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private function applyFormattingRule($ruleResult, $value) |
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{ |
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if($ruleResult instanceof \Closure) |
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{ |
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return $ruleResult($value); |
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} |
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return $ruleResult; |
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} |
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} |
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Niktux /
karma
