seo.php

<?php
namespace Bitrix\Landing\Source;
 
class Seo
{
    const TITLE = 'title';
    const BROWSER_TITLE = 'browser_title';
    const KEYWORDS = 'keywords';
    const DESCRIPTION = 'description';
 
    protected $properties = [];
 
    public function __construct()
    {
 
    }
 
    public function setProperties(array $values)
    {
        $values = array_filter($values, [__CLASS__, 'clearValues'], ARRAY_FILTER_USE_BOTH);
        if (!empty($values))
        {
            $this->properties = array_merge($this->properties, $values);
        }
    }
 
    public function setProperty($name, $value)
    {
        $name = (string)$name;
        if ($name !== '' && $value !== null)
        {
            $this->properties[$name] = $value;
        }
    }
 
    public function getProperties()
    {
        return (!empty($this->properties) ? $this->properties : null);
    }
 
    public function getProperty($name)
    {
        $name = (string)$name;
        if ($name !== '')
        {
            return (isset($this->properties[$name]) ? $this->properties[$name] : null);
        }
        return null;
    }
 
    public function clear()
    {
        $this->clearProperties();
    }
 
    public function clearProperties()
    {
        $this->properties = [];
    }
 
    public function clearProperty($name)
    {
        $name = (string)$name;
        if ($name !== '' && isset($this->properties[$name]))
        {
            unset($this->properties[$name]);
        }
    }
 
    public function setTitle($value)
    {
        if (is_string($value))
        {
            $this->setProperty(self::TITLE, strip_tags(trim($value)));
        }
    }
 
    public function setBrowserTitle($value)
    {
        if (is_string($value))
        {
            $this->setProperty(self::BROWSER_TITLE, strip_tags(trim($value)));
        }
    }
 
    public function setKeywords($value)
    {
        if (is_array($value))
        {
            $value = array_filter($value, [__CLASS__, 'clearValues'], ARRAY_FILTER_USE_BOTH);
            $value = implode(', ', $value);
        }
        if (is_string($value))
        {
            $this->setProperty(self::KEYWORDS, strip_tags(trim($value)));
        }
    }
 
    public function setDescription($value)
    {
        if (is_string($value))
        {
            $this->setProperty(self::DESCRIPTION, strip_tags(trim($value)));
        }
    }
 
    public function getTitle()
    {
        return $this->getProperty(self::TITLE);
    }
 
    public function getBrowserTitle()
    {
        return $this->getProperty(self::BROWSER_TITLE);
    }
 
    public function getKeywords()
    {
        return $this->getProperty(self::KEYWORDS);
    }
 
    public function getDescription()
    {
        return $this->getProperty(self::DESCRIPTION);
    }
 
    protected static function clearValues($value, $name)
    {
        return ((string)$name !== '' && $value !== null);
    }
}