<?php

class Qs_Form_Element_HtmlEditor extends Zend_Form_Element_Textarea
{
    const MODE_EDIT         = 'edit';
    const MODE_VIEW         = 'view';
    const MODE_POPUP_BUTTON = 'popup';

    protected static $_defaultToolbar = 'Default';
    protected static $_defaultMode = self::MODE_EDIT;
    protected static $_defaultHeight = 250;
    protected $_hasMsWordNote = false;
    protected $_editorDecorator = 'CkEditor';
    protected $_scriptOptions = [];
    protected $_mode;

    /** @var bool */
    protected $_hasSmartyProtectedSource = false;

    public function __construct($spec, $options = null)
    {
        if (null !== $options) {
            parent::__construct($spec, $options);
        } else {
            parent::__construct($spec);
        }

        $this->addFilter('Callback', [[$this, 'filterHtml']]);
    }

    public function filterHtml($html)
    {
        /**
         * фікс XSS (http://www.exploit-db.com/exploits/25493/)
         */
        if ($html && false !== stripos($html, '<iframe')) {
            $matches = [];
            if (preg_match_all('/\<\s*iframe[^\>]+\>.*<\s*\/iframe\s*>/imU', $html, $matches)) {
                $matches = reset($matches);
                $matches = array_unique($matches);
                foreach ($matches as $match) {
                    $decoded = rawurldecode($match);
                    if (false !== stripos($decoded, '<script')) {
                        $html = str_replace($match, '', $html);
                    }
                }
            }
        }

        return $html;
    }

    public function setWidth($width)
    {
        $this->setScriptOption('width', $width);
        return $this;
    }

    public function getWidth()
    {
        return $this->getScriptOption('width');
    }

    public function setHeight($height)
    {
        $this->setScriptOption('height', $height);
        return $this;
    }

    public function getHeight()
    {
        return $this->getScriptOption('height');
    }

    public function setMode($mode)
    {
        $this->_mode = $mode;
        return $this;
    }

    public function getMode()
    {
        if (null === $this->_mode) {
            $this->_mode = Qs_Form_Element_HtmlEditor::$_defaultMode;
        }
        return $this->_mode;
    }

    /**
     * Set list of placeholders that will be shown in editors footer and take part in validation
     * @param array $placeholders
     * @return $this
     */
    public function setTemplatePlaceholders(array $placeholders)
    {
        $this->setScriptOption('templatePlaceholders', $placeholders);
        return $this;
    }

    public function setEditorDecorator($name)
    {
        $this->_editorDecorator = $name;
        return $this;
    }

    public function getEditorDecorator()
    {
        return $this->_editorDecorator;
    }

    public function setToolbar($name)
    {
        $this->setScriptOption('toolbar', $name);
        return $this;
    }

    public function getToolbar()
    {
        return $this->getScriptOption('toolbar');
    }

    public function setHasMsWordNote($value)
    {
        $this->_hasMsWordNote = (bool) $value;
    }

    public function getHasMsWordNote()
    {
        return $this->_hasMsWordNote;
    }

    public function loadDefaultDecorators()
    {
        if ($this->loadDefaultDecoratorsIsDisabled()) {
            return;
        }

        $decorators = $this->getDecorators();
        if (empty($decorators)) {
            $this->addDecorator('ViewHelper')
                ->addDecorator($this->getEditorDecorator())
                ->addDecorator('Errors')
                ->addDecorator('Description', ['tag' => 'p', 'class' => 'description'])
                ->addDecorator('HtmlTag', ['tag' => 'dd',
                                           'id'  => $this->getName() . '-element'])
                ->addDecorator('Label', ['tag' => 'dt']);
        }
    }

    public function setScriptOptions($options)
    {
        $this->_scriptOptions = array_merge($this->_scriptOptions, $options);
        return $this;
    }

    public function getScriptOptions()
    {
        if (!isset($this->_scriptOptions['toolbar'])) {
            $this->_scriptOptions['toolbar'] = Qs_Form_Element_HtmlEditor::$_defaultToolbar;
        }
        if (!isset($this->_scriptOptions['height'])) {
            $this->_scriptOptions['height'] = Qs_Form_Element_HtmlEditor::$_defaultHeight;
        }
        return $this->_scriptOptions;
    }

    public function setScriptOption($name, $value)
    {
        $this->_scriptOptions[$name] = $value;
        return $this;
    }

    public function getScriptOption($name)
    {
        return Qs_Array::get($this->_scriptOptions, $name);
    }
}