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<?php namespace Wn\Generators\Argument; |
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use Wn\Generators\Argument\ArgumentFormat; |
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use Wn\Generators\Exceptions\ArgumentParserException; |
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class ArgumentParser { |
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protected $format; |
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public function __construct(ArgumentFormat $format) |
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{ |
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$this->format = $format; |
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} |
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public function parse($args) |
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{ |
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return $this->parseToken($args, $this->format); |
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} |
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protected function parseToken($token, ArgumentFormat $format){ |
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switch($format->type) { |
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case 'string': |
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return $token; |
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case 'number': |
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return $this->parseNumber($token); |
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case 'boolean': |
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return $this->parseBoolean($token, $format->name); |
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case 'array': |
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return $this->parseArray($token, $format->separator, $format->format); |
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case 'object': |
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return $this->parseObject($token, $format->separator, $format->format); |
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default: |
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throw new ArgumentParserException("Unknown format type: '{$format->type}'"); |
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} |
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} |
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protected function parseNumber($token) |
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{ |
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if(! is_numeric($token)) { |
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throw new ArgumentParserException("Unable to parse '{$token}' as number"); |
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} |
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return $token + 0; |
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} |
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protected function parseBoolean($token, $name) |
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{ |
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if(in_array($token, ['yes', 'true', '1', $name])) { |
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return true; |
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} else if(in_array($token, ['no', 'false', '0', "!{$name}"])){ |
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return false; |
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} else { |
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return null; |
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} |
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} |
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protected function parseArray($token, $separator, ArgumentFormat $format) |
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{ |
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$result = []; |
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$tokens = explode($separator, $token); |
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foreach($tokens as $value) { |
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array_push($result, $this->parseToken($value, $format)); |
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} |
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return $result; |
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} |
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protected function parseObject($token, $separator, $fields) |
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{ |
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$result = []; |
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$tokens = explode($separator, $token); |
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$tokensNumber = count($tokens); |
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$requiredFieldsIndexes = []; |
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$optionalFieldsIndexes = []; |
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foreach($fields as $index => $format) { |
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if($format->default === null) { |
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array_push($requiredFieldsIndexes, $index); |
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} else { |
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array_push($optionalFieldsIndexes, $index); |
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} |
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} |
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$requiredFieldsIndexesNumber = count($requiredFieldsIndexes); |
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if($tokensNumber < $requiredFieldsIndexesNumber) { |
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$requiredFields = array_map(function($index) use ($fields) { |
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return $fields[$index]->name; |
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}, $requiredFieldsIndexes); |
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$requiredFields = implode($separator, $requiredFields); |
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throw new ArgumentParserException("Required field missing: {$tokensNumber} given " |
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. "({$token}) but {$requiredFieldsIndexesNumber} required ({$requiredFields})"); |
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} |
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$givenOptionalFieldsIndexes = array_slice( |
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$optionalFieldsIndexes, 0, $tokensNumber - $requiredFieldsIndexesNumber); |
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$notPresentFieldsIndexes = array_slice( |
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$optionalFieldsIndexes, $tokensNumber - $requiredFieldsIndexesNumber); |
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$givenFieldsIndexes = array_merge($requiredFieldsIndexes, $givenOptionalFieldsIndexes); |
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sort($givenFieldsIndexes); |
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// Fill the given fields |
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for($i = 0; $i < $tokensNumber; $i ++) { |
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$fieldFormat = $fields[$givenFieldsIndexes[$i]]; |
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$result[$fieldFormat->name] = $this->parseToken($tokens[$i], $fieldFormat); |
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} |
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// Fill other fields with default values |
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foreach($notPresentFieldsIndexes as $index) { |
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$fieldFormat = $fields[$index]; |
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$result[$fieldFormat->name] = $fieldFormat->default; |
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} |
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return $result; |
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} |
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} |
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webNeat /
lumen-generators
