/**
* {@inheritdoc}
*/
public function read($length)
{
$this->initializeBeforeRead();
if (!$this->generator->valid()) {
return '';
}
if ($this->resource->eof()) {
$this->generator->next();
if (!$this->generator->valid()) {
return '';
}
$this->resource = $this->generator->current();
$this->resource->rewind();
}
return $this->resource->fread($length);
}
/**
* Get the csv file as a string.
*
* @return string
*/
public function asString()
{
$tmp = new \SplTempFileObject();
foreach ($this->data as $row) {
$tmp->fputcsv($row, $this->delimiter);
if ($this->lineEnding !== "\n") {
$tmp->fseek(-1, \SEEK_CUR);
$tmp->fwrite($this->lineEnding);
}
}
# Find out how much data we have written
$length = $tmp->ftell();
if ($length < 1) {
return "";
}
# Reset the internal pointer and return all the data we have written
$tmp->fseek(0);
return $tmp->fread($length);
}
/**
* Removes a Key/Value pair based on its position in the file
*
* @param integer $position The offset position in the file
*/
public function remove($position)
{
$temp = new \SplTempFileObject(-1);
$this->file->flock(LOCK_EX);
$filesize = $this->file->getSize();
$metadata = $this->getMetadata($position);
// Seek past the document we want to remove
$this->file->fseek($metadata->length, SEEK_CUR);
// Write everything after the target document to memory
$temp->fwrite($this->file->fread($filesize));
// Clear the file up to the target document
$this->file->ftruncate($position);
// Write Temp back to the end of the file
$temp->fseek(0);
$this->file->fseek(0, SEEK_END);
$this->file->fwrite($temp->fread($filesize));
$this->file->flock(LOCK_UN);
}
