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<?php
namespace Core;
use SplFileObject;
/**
* CSV Writer/Reader
*
* @package core
* @author Frederic Guillot
*/
class Csv
{
/**
* CSV delimiter
*
* @access private
* @var string
*/
private $delimiter = ',';
/**
* CSV enclosure
*
* @access private
* @var string
*/
private $enclosure = '"';
/**
* CSV/SQL columns
*
* @access private
* @var array
*/
private $columns = array();
/**
* Constructor
*
* @access public
* @param string $delimiter
* @param string $enclosure
*/
public function __construct($delimiter = ',', $enclosure = '"')
{
$this->delimiter = $delimiter;
$this->enclosure = $enclosure;
}
/**
* Get list of delimiters
*
* @static
* @access public
* @return array
*/
public static function getDelimiters()
{
return array(
',' => t('Comma'),
';' => t('Semi-colon'),
'\t' => t('Tab'),
'|' => t('Vertical bar'),
);
}
/**
* Get list of enclosures
*
* @static
* @access public
* @return array
*/
public static function getEnclosures()
{
return array(
'"' => t('Double Quote'),
"'" => t('Single Quote'),
'' => t('None'),
);
}
/**
* Check boolean field value
*
* @static
* @access public
* @return integer
*/
public static function getBooleanValue($value)
{
if (! empty($value)) {
$value = trim(strtolower($value));
return $value === '1' || $value{0} === 't' ? 1 : 0;
}
return 0;
}
/**
* Output CSV file to standard output
*
* @static
* @access public
* @param array $rows
*/
public static function output(array $rows)
{
$csv = new static;
$csv->write('php://output', $rows);
}
/**
* Define column mapping between CSV and SQL columns
*
* @access public
* @param array $columns
* @return Csv
*/
public function setColumnMapping(array $columns)
{
$this->columns = $columns;
return $this;
}
/**
* Read CSV file
*
* @access public
* @param string $filename
* @param \Closure $callback Example: function(array $row, $line_number)
* @return Csv
*/
public function read($filename, $callback)
{
$file = new SplFileObject($filename);
$file->setFlags(SplFileObject::READ_CSV);
$file->setCsvControl($this->delimiter, $this->enclosure);
$line_number = 0;
foreach ($file as $row) {
$row = $this->filterRow($row);
if (! empty($row) && $line_number > 0) {
call_user_func_array($callback, array($this->associateColumns($row), $line_number));
}
$line_number++;
}
return $this;
}
/**
* Write CSV file
*
* @access public
* @param string $filename
* @param array $rows
* @return Csv
*/
public function write($filename, array $rows)
{
$file = new SplFileObject($filename, 'w');
foreach ($rows as $row) {
$file->fputcsv($row, $this->delimiter, $this->enclosure);
}
return $this;
}
/**
* Associate columns header with row values
*
* @access private
* @param array $row
* @return array
*/
private function associateColumns(array $row)
{
$line = array();
$index = 0;
foreach ($this->columns as $sql_name => $csv_name) {
if (isset($row[$index])) {
$line[$sql_name] = $row[$index];
}
else {
$line[$sql_name] = '';
}
$index++;
}
return $line;
}
/**
* Filter empty rows
*
* @access private
* @param array $row
* @return array
*/
private function filterRow(array $row)
{
return array_filter($row);
}
}
|
