<?php

class Qs_Validate_ExportDir extends Zend_Validate_Abstract
{
    protected $_checkWritable = true;
    protected $_forceCreate = true;

    const ERR_WRONG_PATH    = 'errWrongName';
    const ERR_CREATE        = 'errCreate';
    const ERR_NOT_WRITABLE  = 'errNotWritable';
    const ERR_NOT_EXISTS    = 'errNotExists';
    const ERR_NOT_DIR       = 'errNotDir';

    protected $_messageTemplates = array(
        self::ERR_WRONG_PATH   => 'Path "%value%" contains not allowed characters',
        self::ERR_CREATE       => 'Failed to create directory "%value%"',
        self::ERR_NOT_WRITABLE => 'Directory "%value%" is not writable',
        self::ERR_NOT_EXISTS   => 'Directory "%value%" does not exists',
        self::ERR_NOT_DIR      => 'File "%value%" is not directory',
    );

    public function __construct($options = null)
    {
        if ($options) {
            if ($options instanceof Zend_Config) {
                $options = $options->toArray();
            }
            if (is_array($options)) {
                $this->setOptions($options);
            } else {
                throw new Exception('Wrong options format');
            }
        }
        return $this;
    }

    public function setOptions(array $options)
    {
        foreach ($options as $name => $value) {
            $method = 'set' . ucfirst($name);
            if (method_exists($this, $method)) {
                $this->$method($value);
            }
        }
        return $this;
    }

    public function isValid($value)
    {
        $value = Qs_Fs::normalize($value);
        $this->_setValue($value);

        if ($value !== Qs_Fs::filterDirName($value)) {
            $this->_error(self::ERR_WRONG_PATH);
            return false;
        }

        if (!is_dir($value)) {
            if (file_exists($value)) {
                $this->_error(self::ERR_NOT_DIR);
                return false;
            } else if ($this->getForceCreate()) {
                umask(0);
                if (!mkdir($value, 0777, true)) {
                    $this->_error(self::ERR_CREATE);
                    return false;
                }
            }
        }
        if (is_dir($value)) {
            if ($this->getCheckWritable() && !is_writable($value)) {
                $this->_error(self::ERR_NOT_WRITABLE);
                return false;
            }
        } else {
            $this->_error(self::ERR_NOT_EXISTS);
            return false;
        }

        return true;
    }

    public function getCheckWritable()
    {
        return $this->_checkWritable;
    }

    public function setCheckWritable($checkWritable)
    {
        $this->_checkWritable = $checkWritable;
        return $this;
    }

    public function getForceCreate()
    {
        return $this->_forceCreate;
    }

    public function setForceCreate($forceCreate)
    {
        $this->_forceCreate = $forceCreate;
        return $this;
    }

}