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<?php
namespace Collective\Html;
use Illuminate\Contracts\Routing\UrlGenerator;
use Illuminate\Support\Traits\Macroable;
class HtmlBuilder
{
use Macroable;
/**
* The URL generator instance.
*
* @var \Illuminate\Contracts\Routing\UrlGenerator
*/
protected $url;
/**
* Create a new HTML builder instance.
*
* @param \Illuminate\Contracts\Routing\UrlGenerator $url
*
* @return void
*/
public function __construct(UrlGenerator $url = null)
{
$this->url = $url;
}
/**
* Convert an HTML string to entities.
*
* @param string $value
*
* @return string
*/
public function entities($value)
{
return htmlentities($value, ENT_QUOTES, 'UTF-8', false);
}
/**
* Convert entities to HTML characters.
*
* @param string $value
*
* @return string
*/
public function decode($value)
{
return html_entity_decode($value, ENT_QUOTES, 'UTF-8');
}
/**
* Generate a link to a JavaScript file.
*
* @param string $url
* @param array $attributes
* @param bool $secure
*
* @return string
*/
public function script($url, $attributes = [], $secure = null)
{
$attributes['src'] = $this->url->asset($url, $secure);
return '<script'.$this->attributes($attributes).'></script>'.PHP_EOL;
}
/**
* Generate a link to a CSS file.
*
* @param string $url
* @param array $attributes
* @param bool $secure
*
* @return string
*/
public function style($url, $attributes = [], $secure = null)
{
$defaults = ['media' => 'all', 'type' => 'text/css', 'rel' => 'stylesheet'];
$attributes = $attributes + $defaults;
$attributes['href'] = $this->url->asset($url, $secure);
return '<link'.$this->attributes($attributes).'>'.PHP_EOL;
}
/**
* Generate an HTML image element.
*
* @param string $url
* @param string $alt
* @param array $attributes
* @param bool $secure
*
* @return string
*/
public function image($url, $alt = null, $attributes = [], $secure = null)
{
$attributes['alt'] = $alt;
return '<img src="'.$this->url->asset($url, $secure).'"'.$this->attributes($attributes).'>';
}
/**
* Generate a link to a Favicon file.
*
* @param string $url
* @param array $attributes
* @param bool $secure
*
* @return string
*/
public function favicon($url, $attributes = [], $secure = null)
{
$defaults = ['rel' => 'shortcut icon', 'type' => 'image/x-icon'];
$attributes = $attributes + $defaults;
$attributes['href'] = $this->url->asset($url, $secure);
return '<link'.$this->attributes($attributes).'>'.PHP_EOL;
}
/**
* Generate a HTML link.
*
* @param string $url
* @param string $title
* @param array $attributes
* @param bool $secure
*
* @return string
*/
public function link($url, $title = null, $attributes = [], $secure = null)
{
$url = $this->url->to($url, [], $secure);
if (is_null($title) || $title === false) {
$title = $url;
}
return '<a href="'.$url.'"'.$this->attributes($attributes).'>'.$this->entities($title).'</a>';
}
/**
* Generate a HTTPS HTML link.
*
* @param string $url
* @param string $title
* @param array $attributes
*
* @return string
*/
public function secureLink($url, $title = null, $attributes = [])
{
return $this->link($url, $title, $attributes, true);
}
/**
* Generate a HTML link to an asset.
*
* @param string $url
* @param string $title
* @param array $attributes
* @param bool $secure
*
* @return string
*/
public function linkAsset($url, $title = null, $attributes = [], $secure = null)
{
$url = $this->url->asset($url, $secure);
return $this->link($url, $title ?: $url, $attributes, $secure);
}
/**
* Generate a HTTPS HTML link to an asset.
*
* @param string $url
* @param string $title
* @param array $attributes
*
* @return string
*/
public function linkSecureAsset($url, $title = null, $attributes = [])
{
return $this->linkAsset($url, $title, $attributes, true);
}
/**
* Generate a HTML link to a named route.
*
* @param string $name
* @param string $title
* @param array $parameters
* @param array $attributes
*
* @return string
*/
public function linkRoute($name, $title = null, $parameters = [], $attributes = [])
{
return $this->link($this->url->route($name, $parameters), $title, $attributes);
}
/**
* Generate a HTML link to a controller action.
*
* @param string $action
* @param string $title
* @param array $parameters
* @param array $attributes
*
* @return string
*/
public function linkAction($action, $title = null, $parameters = [], $attributes = [])
{
return $this->link($this->url->action($action, $parameters), $title, $attributes);
}
/**
* Generate a HTML link to an email address.
*
* @param string $email
* @param string $title
* @param array $attributes
*
* @return string
*/
public function mailto($email, $title = null, $attributes = [])
{
$email = $this->email($email);
$title = $title ?: $email;
$email = $this->obfuscate('mailto:').$email;
return '<a href="'.$email.'"'.$this->attributes($attributes).'>'.$this->entities($title).'</a>';
}
/**
* Obfuscate an e-mail address to prevent spam-bots from sniffing it.
*
* @param string $email
*
* @return string
*/
public function email($email)
{
return str_replace('@', '@', $this->obfuscate($email));
}
/**
* Generate an ordered list of items.
*
* @param array $list
* @param array $attributes
*
* @return string
*/
public function ol($list, $attributes = [])
{
return $this->listing('ol', $list, $attributes);
}
/**
* Generate an un-ordered list of items.
*
* @param array $list
* @param array $attributes
*
* @return string
*/
public function ul($list, $attributes = [])
{
return $this->listing('ul', $list, $attributes);
}
/**
* Generate a description list of items.
*
* @param array $list
* @param array $attributes
*
* @return string
*/
public function dl(array $list, array $attributes = [])
{
$attributes = $this->attributes($attributes);
$html = "<dl{$attributes}>";
foreach ($list as $key => $value) {
$value = (array) $value;
$html .= "<dt>$key</dt>";
foreach ($value as $v_key => $v_value) {
$html .= "<dd>$v_value</dd>";
}
}
$html .= '</dl>';
return $html;
}
/**
* Create a listing HTML element.
*
* @param string $type
* @param array $list
* @param array $attributes
*
* @return string
*/
protected function listing($type, $list, $attributes = [])
{
$html = '';
if (count($list) == 0) {
return $html;
}
// Essentially we will just spin through the list and build the list of the HTML
// elements from the array. We will also handled nested lists in case that is
// present in the array. Then we will build out the final listing elements.
foreach ($list as $key => $value) {
$html .= $this->listingElement($key, $type, $value);
}
$attributes = $this->attributes($attributes);
return "<{$type}{$attributes}>{$html}</{$type}>";
}
/**
* Create the HTML for a listing element.
*
* @param mixed $key
* @param string $type
* @param mixed $value
*
* @return string
*/
protected function listingElement($key, $type, $value)
{
if (is_array($value)) {
return $this->nestedListing($key, $type, $value);
} else {
return '<li>'.e($value).'</li>';
}
}
/**
* Create the HTML for a nested listing attribute.
*
* @param mixed $key
* @param string $type
* @param mixed $value
*
* @return string
*/
protected function nestedListing($key, $type, $value)
{
if (is_int($key)) {
return $this->listing($type, $value);
} else {
return '<li>'.$key.$this->listing($type, $value).'</li>';
}
}
/**
* Build an HTML attribute string from an array.
*
* @param array $attributes
*
* @return string
*/
public function attributes($attributes)
{
$html = [];
foreach ((array) $attributes as $key => $value) {
$element = $this->attributeElement($key, $value);
if (!is_null($element)) {
$html[] = $element;
}
}
return count($html) > 0 ? ' '.implode(' ', $html) : '';
}
/**
* Build a single attribute element.
*
* @param string $key
* @param string $value
*
* @return string
*/
protected function attributeElement($key, $value)
{
// For numeric keys we will assume that the key and the value are the same
// as this will convert HTML attributes such as "required" to a correct
// form like required="required" instead of using incorrect numerics.
if (is_numeric($key)) {
$key = $value;
}
if (!is_null($value)) {
return $key.'="'.e($value).'"';
}
}
/**
* Obfuscate a string to prevent spam-bots from sniffing it.
*
* @param string $value
*
* @return string
*/
public function obfuscate($value)
{
$safe = '';
foreach (str_split($value) as $letter) {
if (ord($letter) > 128) {
return $letter;
}
// To properly obfuscate the value, we will randomly convert each letter to
// its entity or hexadecimal representation, keeping a bot from sniffing
// the randomly obfuscated letters out of the string on the responses.
switch (rand(1, 3)) {
case 1:
$safe .= '&#'.ord($letter).';'; break;
case 2:
$safe .= '&#x'.dechex(ord($letter)).';'; break;
case 3:
$safe .= $letter;
}
}
return $safe;
}
/**
* Generate a meta tag.
*
* @param string $name
* @param string $content
* @param array $attributes
*
* @return string
*/
public function meta($name, $content, array $attributes = [])
{
$defaults = compact('name', 'content');
$attributes = array_merge($defaults, $attributes);
return '<meta'.$this->attributes($attributes).'>'.PHP_EOL;
}
}