<?php
namespace PhpOffice\PhpSpreadsheet;
use PhpOffice\PhpSpreadsheet\Reader\IReader;
use PhpOffice\PhpSpreadsheet\Shared\File;
use PhpOffice\PhpSpreadsheet\Writer\IWriter;
/**
* Factory to create readers and writers easily.
*
* It is not required to use this class, but it should make it easier to read and write files.
* Especially for reading files with an unknown format.
*/
abstract class IOFactory
{
public const READER_XLSX = 'Xlsx';
public const READER_XLS = 'Xls';
public const READER_XML = 'Xml';
public const READER_ODS = 'Ods';
public const READER_SYLK = 'Slk';
public const READER_SLK = 'Slk';
public const READER_GNUMERIC = 'Gnumeric';
public const READER_HTML = 'Html';
public const READER_CSV = 'Csv';
public const WRITER_XLSX = 'Xlsx';
public const WRITER_XLS = 'Xls';
public const WRITER_ODS = 'Ods';
public const WRITER_CSV = 'Csv';
public const WRITER_HTML = 'Html';
/** @var string[] */
private static $readers = [
self::READER_XLSX => Reader\Xlsx::class,
self::READER_XLS => Reader\Xls::class,
self::READER_XML => Reader\Xml::class,
self::READER_ODS => Reader\Ods::class,
self::READER_SLK => Reader\Slk::class,
self::READER_GNUMERIC => Reader\Gnumeric::class,
self::READER_HTML => Reader\Html::class,
self::READER_CSV => Reader\Csv::class,
];
/** @var string[] */
private static $writers = [
self::WRITER_XLS => Writer\Xls::class,
self::WRITER_XLSX => Writer\Xlsx::class,
self::WRITER_ODS => Writer\Ods::class,
self::WRITER_CSV => Writer\Csv::class,
self::WRITER_HTML => Writer\Html::class,
'Tcpdf' => Writer\Pdf\Tcpdf::class,
'Dompdf' => Writer\Pdf\Dompdf::class,
'Mpdf' => Writer\Pdf\Mpdf::class,
];
/**
* Create Writer\IWriter.
*/
public static function createWriter(Spreadsheet $spreadsheet, string $writerType): IWriter
{
if (!isset(self::$writers[$writerType])) {
throw new Writer\Exception("No writer found for type $writerType");
}
// Instantiate writer
/** @var IWriter */
$className = self::$writers[$writerType];
return new $className($spreadsheet);
}
/**
* Create IReader.
*/
public static function createReader(string $readerType): IReader
{
if (!isset(self::$readers[$readerType])) {
throw new Reader\Exception("No reader found for type $readerType");
}
// Instantiate reader
/** @var IReader */
$className = self::$readers[$readerType];
return new $className();
}
/**
* Loads Spreadsheet from file using automatic Reader\IReader resolution.
*
* @param string $filename The name of the spreadsheet file
* @param int $flags the optional second parameter flags may be used to identify specific elements
* that should be loaded, but which won't be loaded by default, using these values:
* IReader::LOAD_WITH_CHARTS - Include any charts that are defined in the loaded file.
* IReader::READ_DATA_ONLY - Read cell values only, not formatting or merge structure.
* IReader::IGNORE_EMPTY_CELLS - Don't load empty cells into the model.
* @param string[] $readers An array of Readers to use to identify the file type. By default, load() will try
* all possible Readers until it finds a match; but this allows you to pass in a
* list of Readers so it will only try the subset that you specify here.
* Values in this list can be any of the constant values defined in the set
* IOFactory::READER_*.
*/
public static function load(string $filename, int $flags = 0, ?array $readers = null): Spreadsheet
{
$reader = self::createReaderForFile($filename, $readers);
return $reader->load($filename, $flags);
}
/**
* Identify file type using automatic IReader resolution.
*/
public static function identify(string $filename, ?array $readers = null): string
{
$reader = self::createReaderForFile($filename, $readers);
$className = get_class($reader);
$classType = explode('\\', $className);
unset($reader);
return array_pop($classType);
}
/**
* Create Reader\IReader for file using automatic IReader resolution.
*
* @param string[] $readers An array of Readers to use to identify the file type. By default, load() will try
* all possible Readers until it finds a match; but this allows you to pass in a
* list of Readers so it will only try the subset that you specify here.
* Values in this list can be any of the constant values defined in the set
* IOFactory::READER_*.
*/
public static function createReaderForFile(string $filename, ?array $readers = null): IReader
{
File::assertFile($filename);
$testReaders = self::$readers;
if ($readers !== null) {
$readers = array_map('strtoupper', $readers);
$testReaders = array_filter(
self::$readers,
function (string $readerType) use ($readers) {
return in_array(strtoupper($readerType), $readers, true);
},
ARRAY_FILTER_USE_KEY
);
}
// First, lucky guess by inspecting file extension
$guessedReader = self::getReaderTypeFromExtension($filename);
if (($guessedReader !== null) && array_key_exists($guessedReader, $testReaders)) {
$reader = self::createReader($guessedReader);
// Let's see if we are lucky
if ($reader->canRead($filename)) {
return $reader;
}
}
// If we reach here then "lucky guess" didn't give any result
// Try walking through all the options in self::$readers (or the selected subset)
foreach ($testReaders as $readerType => $class) {
// Ignore our original guess, we know that won't work
if ($readerType !== $guessedReader) {
$reader = self::createReader($readerType);
if ($reader->canRead($filename)) {
return $reader;
}
}
}
throw new Reader\Exception('Unable to identify a reader for this file');
}
/**
* Guess a reader type from the file extension, if any.
*/
private static function getReaderTypeFromExtension(string $filename): ?string
{
$pathinfo = pathinfo($filename);
if (!isset($pathinfo['extension'])) {
return null;
}
switch (strtolower($pathinfo['extension'])) {
case 'xlsx': // Excel (OfficeOpenXML) Spreadsheet
case 'xlsm': // Excel (OfficeOpenXML) Macro Spreadsheet (macros will be discarded)
case 'xltx': // Excel (OfficeOpenXML) Template
case 'xltm': // Excel (OfficeOpenXML) Macro Template (macros will be discarded)
return 'Xlsx';
case 'xls': // Excel (BIFF) Spreadsheet
case 'xlt': // Excel (BIFF) Template
return 'Xls';
case 'ods': // Open/Libre Offic Calc
case 'ots': // Open/Libre Offic Calc Template
return 'Ods';
case 'slk':
return 'Slk';
case 'xml': // Excel 2003 SpreadSheetML
return 'Xml';
case 'gnumeric':
return 'Gnumeric';
case 'htm':
case 'html':
return 'Html';
case 'csv':
// Do nothing
// We must not try to use CSV reader since it loads
// all files including Excel files etc.
return null;
default:
return null;
}
}
/**
* Register a writer with its type and class name.
*/
public static function registerWriter(string $writerType, string $writerClass): void
{
if (!is_a($writerClass, IWriter::class, true)) {
throw new Writer\Exception('Registered writers must implement ' . IWriter::class);
}
self::$writers[$writerType] = $writerClass;
}
/**
* Register a reader with its type and class name.
*/
public static function registerReader(string $readerType, string $readerClass): void
{
if (!is_a($readerClass, IReader::class, true)) {
throw new Reader\Exception('Registered readers must implement ' . IReader::class);
}
self::$readers[$readerType] = $readerClass;
}
}
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