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ExportToCsvUtf16le.php
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ExportToCsvUtf16le.php
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<?php
/*
"Contact Form to Database" Copyright (C) 2011-2012 Michael Simpson (email : michael.d.simpson@gmail.com)
This file is part of Contact Form to Database.
Contact Form to Database is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Contact Form to Database is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Contact Form to Database.
If not, see <http://www.gnu.org/licenses/>.
*/
require_once('ExportBase.php');
require_once('CFDBExport.php');
class ExportToCsvUtf16le extends ExportBase implements CFDBExport {
public function export($formName, $options = null) {
$this->setOptions($options);
$this->setCommonOptions();
// Security Check
if (!$this->isAuthorized()) {
$this->assertSecurityErrorMessage();
return;
}
// Query DB for the data for that form
$submitTimeKeyName = 'Submit_Time_Key';
$this->setDataIterator($formName, $submitTimeKeyName);
$this->clearAllOutputBuffers();
// Headers
$this->echoHeaders(
array('Content-Type: text/csv; charset=UTF-16LE',
"Content-Disposition: attachment; filename=\"$formName.csv\""));
// todo: make this work
// $fileName = $formName . '.csv';
// $fileName = $this->encodeWordRfc2231($formName) . '.csv';
// header("Content-Disposition: attachment; filename*=UTF-8''$fileName");
//Bytes FF FE (UTF-16LE BOM)
echo chr(255) . chr(254);
$eol = $this->encode(utf8_encode("\n"));
$delimiter = $this->encode(utf8_encode("\t"));
// Column Headers
if (isset($this->options['header']) && $this->options['header'] != 'true') {
// do not output column headers
}
else {
foreach ($this->dataIterator->getDisplayColumns() as $aCol) {
$colDisplayValue = $aCol;
if ($this->headers && isset($this->headers[$aCol])) {
$colDisplayValue = $this->headers[$aCol];
}
echo $this->prepareCsvValue($colDisplayValue);
echo $delimiter;
}
echo $eol;
}
// Rows
$showFileUrlsInExport = $this->plugin->getOption('ShowFileUrlsInExport') == 'true';
while ($this->dataIterator->nextRow()) {
$fields_with_file = null;
if ($showFileUrlsInExport &&
isset($this->dataIterator->row['fields_with_file']) &&
$this->dataIterator->row['fields_with_file'] != null) {
$fields_with_file = explode(',', $this->dataIterator->row['fields_with_file']);
}
foreach ($this->dataIterator->getDisplayColumns() as $aCol) {
$cell = isset($this->dataIterator->row[$aCol]) ? $this->dataIterator->row[$aCol] : '';
if ($showFileUrlsInExport &&
$fields_with_file &&
$cell &&
in_array($aCol, $fields_with_file)) {
$cell = $this->plugin->getFileUrl($this->dataIterator->row[$submitTimeKeyName], $formName, $aCol);
}
echo $this->prepareCsvValue($cell);
echo $delimiter;
}
echo $eol;
}
}
protected function &prepareCsvValue($text) {
// Excel does not like \n characters in UTF-16LE, so we replace with a space
$text = str_replace("\n", ' ', $text);
// In CSV, escape double-quotes by putting two double quotes together
$text = str_replace('"', '""', $text);
// Escape function calls
$text = $this->escapeFunctionCall($text);
// Quote it to escape delimiters
$text = '"' . $text . '"';
// Encode UTF-16LE
$text = $this->encode($text);
return $text;
}
protected function encode($text) {
return mb_convert_encoding($text, 'UTF-16LE', 'UTF-8');
}
protected function &encodeWordRfc2231($word) {
$binArray = unpack("C*", $word);
$hex = '';
foreach ($binArray as $chr) {
$hex .= '%' . sprintf("%02X", base_convert($chr, 2, 16));
}
return $hex;
}
/**
* To avoid CSV injection of functions, add a single quote at the beginning
* of any value that begins with an = per Excel convention
* @param $value
* @return string
*/
public function escapeFunctionCall($value) {
if (strpos($value, '=') === 0) {
$value = "'" . $value;
}
return $value;
}
}