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<?php |
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/** |
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* Created by PhpStorm. |
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* User: sergio.rodenas |
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* Date: 15/5/18 |
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* Time: 18:59 |
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*/ |
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namespace Rodenastyle\StreamParser\Parsers; |
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use Rodenastyle\StreamParser\Exceptions\IncompleteParseException; |
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use Rodenastyle\StreamParser\StreamParserInterface; |
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use Tightenco\Collect\Support\Collection; |
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class CSVParser implements StreamParserInterface |
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{ |
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protected $reader, $source, $headers, $currentLine; |
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public static $delimiters = [",", ";"]; |
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public static $fieldDelimiter = ","; |
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public static $skipsEmptyLines = true; |
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public function from(String $source): StreamParserInterface |
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{ |
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$this->source = $source; |
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return $this; |
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} |
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public function each(callable $function) |
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{ |
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$this->start(); |
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while($this->read()){ |
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if($this->currentLineIsValid()){ |
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$function($this->getCurrentLineAsCollection()); |
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} |
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} |
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$this->close(); |
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} |
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private function start() |
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{ |
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$this->reader = fopen($this->source, 'r'); |
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$this->read(); |
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$this->headers = $this->currentLine; |
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return $this; |
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} |
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private function close(){ |
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if( ! fclose($this->reader)){ |
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throw new IncompleteParseException(); |
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} |
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} |
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private function read(): bool{ |
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$this->currentLine = new Collection(fgetcsv($this->reader, null, static::$fieldDelimiter)); |
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//EOF detection |
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return $this->currentLine->first() !== false; |
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} |
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private function currentLineIsValid(): bool{ |
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if(static::$skipsEmptyLines){ |
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return ! $this->currentLineIsEmpty(); |
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} |
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return true; |
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} |
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private function currentLineIsEmpty(){ |
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return $this->currentLine->reject(function($value){ |
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return $this->isEmptyValue($value); |
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})->isEmpty(); |
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} |
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private function isEmptyValue($value){ |
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return $value === "" || $value === null; |
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} |
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private function getCurrentLineAsCollection() |
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{ |
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$headers = $this->headers; |
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$values = $this->formatCurrentLineValues($this->currentLine); |
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return $headers->intersectByKeys($this->currentLine) |
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->combine($values->recursive()) |
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->reject(function($value){ |
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return $this->isEmptyValue($value); |
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}); |
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} |
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private function formatCurrentLineValues(Collection $collection){ |
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$this->explodeCollectionValues($collection); |
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return $collection; |
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} |
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private function explodeCollectionValues(Collection $collection){ |
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$collection->transform(function($value){ |
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(new Collection(static::$delimiters))->each(function($delimiter) use (&$value){ |
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if( ! is_array($value) && strpos($value, $delimiter) !== false){ |
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$value = explode($delimiter, $value); |
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} |
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}); |
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if(is_array($value)){ |
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return (new Collection($value))->reject(function($value){ |
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return $this->isEmptyValue($value); |
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}); |
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} else { |
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return $value; |
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} |
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}); |
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} |
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} |
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Rodenastyle /
stream-parser
