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<?php |
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/** |
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* CSV |
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* |
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* Comma Separated Values Tools. |
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* |
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* @package core |
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* @author [email protected] |
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* @copyright Caffeina srl - 2015 - http://caffeina.com |
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*/ |
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class CSV { |
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use Module; |
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const AUTO = null, |
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STANDARD = ',', |
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EXCEL = ';', |
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TAB = "\t", |
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READ = 'r', |
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WRITE = 'w'; |
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protected $file, |
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$headers = [], |
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$template = [], |
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$mode = self::WRITE, |
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$format = self::STANDARD, |
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$savedheaders = false; |
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public static function open($file, $format=self::AUTO){ |
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return new static($file,self::READ,$format); |
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} |
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public static function create($file, $format=self::STANDARD){ |
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return new static($file,self::WRITE, $format); |
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} |
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public function SQL($sql){ |
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$csv = $this; |
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SQL::each($sql,function($row) use (&$csv){ |
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$csv->write($row); |
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}); |
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return $this; |
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} |
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public static function fromSQL($sql, $format=self::AUTO){ |
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return static::create(tempnam(sys_get_temp_dir(), 'CSVx'), $format)->SQL($sql); |
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} |
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public static function fromTable($table, $format=self::AUTO){ |
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$csv = static::create(tempnam(sys_get_temp_dir(), 'CSVx'), $format); |
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foreach($table as $row){ |
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$csv->write($row); |
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} |
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return $csv; |
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} |
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public function __construct($file, $mode=self::READ, $format=self::AUTO){ |
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$this->mode = $mode; |
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$this->file = new \SplFileObject($file,'c+'); |
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if (!$this->file->valid()) throw new Exception("Error opening CSV file [$file]", 1); |
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$this->file->setFlags( |
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\SplFileObject::READ_CSV | // set file reading mode to csv |
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\SplFileObject::SKIP_EMPTY | // ignore empty lines |
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\SplFileObject::DROP_NEW_LINE // drop new line from last column in record |
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); |
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$this->format = ($format==self::AUTO ? $this->guessSeparator() : $format); |
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$this->file->setCsvControl($this->format,'"',"\\"); |
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} |
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private function guessSeparator($checkLines = 2){ |
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if ($this->mode == self::WRITE) return self::STANDARD; |
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$delimiters = [",","\t",";"]; |
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$results = []; |
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$this->file->rewind(); |
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while ($checkLines--) { |
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$line = $this->file->fgets(); |
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foreach ($delimiters as $delimiter){ |
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$fields = preg_split('/['.$delimiter.']/', $line); |
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if(count($fields) > 1){ |
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if(empty($results[$delimiter])){ |
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$results[$delimiter] = 1; |
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} else { |
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$results[$delimiter]++; |
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} |
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} |
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} |
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} |
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$this->file->rewind(); |
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$results = array_keys($results, max($results)); |
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return $results[0]; |
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} |
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public function write($row){ |
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if ($this->mode != self::WRITE) return; |
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$row = (array)$row; |
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if (false === $this->savedheaders) { |
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$this->schema(array_keys($row)); |
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} |
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$row_t = $this->template; |
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foreach ($this->headers as $key) { |
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if (isset($row[$key])) $row_t[$key] = $row[$key]; |
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} |
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$this->file->fputcsv($row_t); |
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} |
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public function read(){ |
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if ($this->mode != self::READ) return; |
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foreach($this->file as $row){ |
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if ($row){ |
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if(!$this->headers) { |
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$this->headers = $row; |
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continue; |
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} |
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yield array_combine($this->headers, array_map('trim', $row)); |
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} |
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} |
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return; |
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} |
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public function each(callable $looper = null){ |
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if ($looper) { |
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foreach($this->read() as $k => $row) $looper($row, (int)$k); |
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return $this; |
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} else { |
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$results = []; |
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foreach($this->read() as $row) $results[] = $row; |
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return $results; |
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} |
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} |
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public function convert($filename, $format=self::STANDARD){ |
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if ($this->mode != self::READ) return; |
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if ($format == self::AUTO) $format = self::STANDARD; |
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$csv = CSV::create($filename, CSV::EXCEL); |
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$this->each(function($row) use ($csv) { |
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$csv->write($row); |
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}); |
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return $csv; |
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} |
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public function flush(){ |
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if ($this->mode == self::WRITE) { |
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$this->file->fflush(); |
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} |
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} |
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public function schema($schema=null){ |
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if($schema){ |
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$this->headers = array_values((array)$schema); |
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if ($this->mode == self::WRITE) { |
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$this->savedheaders = true; |
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$this->template = array_combine($this->headers, array_pad([],count($this->headers),'')); |
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$this->file->fputcsv($this->headers); |
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} |
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return $this; |
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} else { |
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return $this->headers; |
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} |
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} |
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public function asString(){ |
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$this->flush(); |
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return file_get_contents($this->file->getPathname()); |
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} |
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public function __toString(){ |
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try { return $this->asString(); } catch(\Exception $e) { return ''; } |
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} |
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} |
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caffeina-core /
core
