Viewing file:  TwitterCards.php (3.84 KB) -rw-r--r--
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<?php
namespace Artesaos\SEOTools;
use Artesaos\SEOTools\Contracts\TwitterCards as TwitterCardsContract;
/**
* TwitterCards provides implementation for `TwitterCards` contract.
*
* @see \Artesaos\SEOTools\Contracts\TwitterCards
*/
class TwitterCards implements TwitterCardsContract
{
/**
* @var string
*/
protected $prefix = 'twitter:';
/**
* @var array
*/
protected $html = [];
/**
* @var array
*/
protected $values = [];
/**
* @var array
*/
protected $images = [];
/**
* @param array $defaults
*/
public function __construct(array $defaults = [])
{
$this->values = $defaults;
}
/**
* {@inheritdoc}
*/
public function generate($minify = false)
{
$this->eachValue($this->values);
$this->eachValue($this->images, 'images');
return ($minify) ? implode('', $this->html) : implode(PHP_EOL, $this->html);
}
/**
* Make tags.
*
* @param array $values
* @param null|string $prefix
*
* @internal param array $properties
*/
protected function eachValue(array $values, $prefix = null)
{
foreach ($values as $key => $value):
if (is_array($value)):
$this->eachValue($value, $key); else:
if (is_numeric($key)):
$key = $prefix.$key; elseif (is_string($prefix)):
$key = $prefix.':'.$key;
endif;
$this->html[] = $this->makeTag($key, $value);
endif;
endforeach;
}
/**
* @param string $key
* @param $value
*
* @return string
*
* @internal param string $values
*/
private function makeTag($key, $value)
{
return sprintf(
'<meta name="%s" content="%s">',
$this->prefix.strip_tags($key),
$this->cleanTagValue($value)
);
}
/**
* Clean tag value
*
* @param string $value meta content value
*
* @return string
*/
protected function cleanTagValue($value)
{
// Safety
$value = str_replace(['http-equiv=', 'url='], '', $value);
// Escape double quotes
$value = htmlspecialchars($value, ENT_QUOTES, null, false);
// Clean
$value = strip_tags($value);
return $value;
}
/**
* {@inheritdoc}
*/
public function addValue($key, $value)
{
$this->values[$key] = $value;
return $this;
}
/**
* {@inheritdoc}
*/
public function setTitle($title)
{
return $this->addValue('title', $title);
}
/**
* {@inheritdoc}
*/
public function setType($type)
{
return $this->addValue('card', $type);
}
/**
* {@inheritdoc}
*/
public function setSite($site)
{
return $this->addValue('site', $site);
}
/**
* {@inheritdoc}
*/
public function setDescription($description)
{
return $this->addValue('description', htmlspecialchars($description, ENT_QUOTES, 'UTF-8', false));
}
/**
* {@inheritdoc}
*/
public function setUrl($url)
{
return $this->addValue('url', $url);
}
/**
* {@inheritdoc}
*
* @deprecated use setImage($image) instead
*/
public function addImage($image)
{
foreach ((array) $image as $url) {
$this->images[] = $url;
}
return $this;
}
/**
* {@inheritdoc}
*
* @deprecated use setImage($image) instead
*/
public function setImages($images)
{
$this->images = [];
return $this->addImage($images);
}
/**
* @param $image
* @return TwitterCardsContract
*/
public function setImage($image)
{
return $this->addValue('image', $image);
}
}
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