<?php

namespace Box\Spout\Reader\ODS;

use Box\Spout\Common\Exception\IOException;
use Box\Spout\Reader\AbstractReader;

/**
 * Class Reader
 * This class provides support to read data from a ODS file
 *
 * @package Box\Spout\Reader\ODS
 */
class Reader extends AbstractReader
{
    /** @var \ZipArchive */
    protected $zip;

    /** @var SheetIterator To iterator over the ODS sheets */
    protected $sheetIterator;

    /**
     * Opens the file at the given file path to make it ready to be read.
     *
     * @param  string $filePath Path of the file to be read
     * @return void
     * @throws \Box\Spout\Common\Exception\IOException If the file at the given path or its content cannot be read
     * @throws \Box\Spout\Reader\Exception\NoSheetsFoundException If there are no sheets in the file
     */
    protected function openReader($filePath)
    {
        $this->zip = new \ZipArchive();

        if ($this->zip->open($filePath) === true) {
            $this->sheetIterator = new SheetIterator($filePath);
        } else {
            throw new IOException("Could not open $filePath for reading.");
        }
    }

    /**
     * Returns an iterator to iterate over sheets.
     *
     * @return SheetIterator To iterate over sheets
     */
    public function getConcreteSheetIterator()
    {
        return $this->sheetIterator;
    }

    /**
     * Closes the reader. To be used after reading the file.
     *
     * @return void
     */
    protected function closeReader()
    {
        if ($this->zip) {
            $this->zip->close();
        }
    }
}