<?php

namespace App\User\Import\Validate;

class CsvFile extends \Zend_Validate_Abstract
{
    const FILE_OPEN_ERROR = 'fileOpenError';
    const MISSED_REQUIRED_COLUMNS = 'notAllColumns';

    protected $_requiredCsvFields = array();
    protected $_messageTemplates = array(
        self::FILE_OPEN_ERROR         => 'File open errors. Try again',
        self::MISSED_REQUIRED_COLUMNS => 'Missed required column(s): %value%.',
    );

    public function __construct($options = array())
    {
        if (is_array($options) && !empty($options)) {
            $this->setOptions($options);
        }
    }

    public function setOptions($options)
    {
        if (isset($options['options'])) {
            unset($options['options']);
        }
        foreach ($options as $key => $value) {
            $method = 'set' . ucfirst($key);
            if (method_exists($this, $method)) {
                // Setter exists; use it
                $this->$method($value);
            }
        }
    }

    public function setRequiredCsvFields($fields)
    {
        $this->_requiredCsvFields = $fields;
        return $this;
    }

    public function isValid($value, $context = null)
    {
        if (!empty($value)) {
            $handle = fopen($value, 'r');
            if ($handle) {
                $csvColumns = array_map("strtolower", fgetcsv($handle));
                $diffColumns = array_diff($this->_requiredCsvFields, $csvColumns);
                if (!empty($diffColumns)) {
                    $this->_error(self::MISSED_REQUIRED_COLUMNS, implode(', ', array_map('strtoupper', $diffColumns)));
                } else {
                    return true;
                }
                fclose($handle);
            } else {
                $this->_error(self::FILE_OPEN_ERROR);
            }
        }

        return false;
    }
}