Proyectos de Subversion Moodle

<?php

declare(strict_types=1);

namespace OpenSpout\Writer;

use OpenSpout\Common\Entity\Row;

use OpenSpout\Common\Exception\IOException;

use OpenSpout\Writer\Exception\WriterNotOpenedException;

abstract class AbstractWriter implements WriterInterface

{

    /** @var resource Pointer to the file/stream we will write to */

    protected $filePointer;

    /** @var string Content-Type value for the header - to be defined by child class */

    protected static string $headerContentType;

    /** @var string Path to the output file */

    private string $outputFilePath;

    /** @var bool Indicates whether the writer has been opened or not */

    private bool $isWriterOpened = false;

    /** @var 0|positive-int */

    private int $writtenRowCount = 0;

    final public function openToFile($outputFilePath): void

    {

        $this->outputFilePath = $outputFilePath;

        $errorMessage = null;

        set_error_handler(static function ($nr, $message) use (&$errorMessage): bool {

            $errorMessage = $message;

            return true;

        });

        $resource = fopen($this->outputFilePath, 'w');

        restore_error_handler();

        if (null !== $errorMessage) {

            throw new IOException("Unable to open file {$this->outputFilePath}: {$errorMessage}");

        }

        \assert(false !== $resource);

        $this->filePointer = $resource;

        $this->openWriter();

        $this->isWriterOpened = true;

    }

    /**

     * @codeCoverageIgnore

     *

     * @param mixed $outputFileName

     */

    final public function openToBrowser($outputFileName): void

    {

        $this->outputFilePath = basename($outputFileName);

        $resource = fopen('php://output', 'w');

        \assert(false !== $resource);

        $this->filePointer = $resource;

        // Clear any previous output (otherwise the generated file will be corrupted)

        // @see https://github.com/box/spout/issues/241

        if (ob_get_length() > 0) {

            ob_end_clean();

        }

        /*

         * Set headers

         *

         * For newer browsers such as Firefox, Chrome, Opera, Safari, etc., they all support and use `filename*`

         * specified by the new standard, even if they do not automatically decode filename; it does not matter;

         * and for older versions of Internet Explorer, they are not recognized `filename*`, will automatically

         * ignore it and use the old `filename` (the only minor flaw is that there must be an English suffix name).

         * In this way, the multi-browser multi-language compatibility problem is perfectly solved, which does not

         * require UA judgment and is more in line with the standard.

         *

         * @see https://github.com/box/spout/issues/745

         * @see https://tools.ietf.org/html/rfc6266

         * @see https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Disposition

         */

        header('Content-Type: '.static::$headerContentType);

        header(

            'Content-Disposition: attachment; '.

            'filename="'.rawurlencode($this->outputFilePath).'"; '.

            'filename*=UTF-8\'\''.rawurlencode($this->outputFilePath)

        );

        /*

         * When forcing the download of a file over SSL,IE8 and lower browsers fail

         * if the Cache-Control and Pragma headers are not set.

         *

         * @see http://support.microsoft.com/KB/323308

         * @see https://github.com/liuggio/ExcelBundle/issues/45

         */

        header('Cache-Control: max-age=0');

        header('Pragma: public');

        $this->openWriter();

        $this->isWriterOpened = true;

    }

    final public function addRow(Row $row): void

    {

        if (!$this->isWriterOpened) {

            throw new WriterNotOpenedException('The writer needs to be opened before adding row.');

        }

        $this->addRowToWriter($row);

        ++$this->writtenRowCount;

    }

    final public function addRows(array $rows): void

    {

        foreach ($rows as $row) {

            $this->addRow($row);

        }

    }

    final public function getWrittenRowCount(): int

    {

        return $this->writtenRowCount;

    }

    final public function close(): void

    {

        if (!$this->isWriterOpened) {

            return;

        }

        $this->closeWriter();

        fclose($this->filePointer);

        $this->isWriterOpened = false;

    }

    /**

     * Opens the streamer and makes it ready to accept data.

     *

     * @throws IOException If the writer cannot be opened

     */

    abstract protected function openWriter(): void;

    /**

     * Adds a row to the currently opened writer.

     *

     * @param Row $row The row containing cells and styles

     *

     * @throws WriterNotOpenedException If the workbook is not created yet

     * @throws IOException              If unable to write data

     */

    abstract protected function addRowToWriter(Row $row): void;

    /**

     * Closes the streamer, preventing any additional writing.

     */

    abstract protected function closeWriter(): void;

}