<?php namespace System;
class HTML {
/**
* Convert HTML characters to entities.
*
* @param string $value
* @return string
*/
public static function entities($value)
{
return htmlentities($value, ENT_QUOTES, Config::get('application.encoding'), false);
}
/**
* Generate a JavaScript reference.
*
* @param string $url
* @return string
*/
public static function script($url)
{
return '<script type="text/javascript" src="'.static::entities(URL::to_asset($url)).'"></script>'.PHP_EOL;
}
/**
* Generate a CSS reference.
*
* @param string $url
* @return string
*/
public static function style($url, $media = 'all')
{
return '<link href="'.static::entities(URL::to_asset($url)).'" rel="stylesheet" type="text/css" media="'.$media.'">'.PHP_EOL;
}
/**
* Generate a HTML span.
*
* @param string $value
* @param array $attributes
* @return string
*/
public static function span($value, $attributes = array())
{
return '<span'.static::attributes($attributes).'>'.static::entities($value).'</span>';
}
/**
* Generate a HTML link.
*
* @param string $url
* @param string $title
* @param array $attributes
* @param bool $https
* @param bool $asset
* @return string
*/
public static function link($url, $title, $attributes = array(), $https = false, $asset = false)
{
return '<a href="'.static::entities(URL::to($url, $https, $asset)).'"'.static::attributes($attributes).'>'.static::entities($title).'</a>';
}
/**
* Generate a HTTPS HTML link.
*
* @param string $url
* @param string $title
* @param array $attributes
* @return string
*/
public static function link_to_secure($url, $title, $attributes = array())
{
return static::link($url, $title, $attributes, true);
}
/**
* Generate an HTML link to an asset.
*
* @param string $url
* @param string $title
* @param array $attributes
* @return string
*/
public static function link_to_asset($url, $title, $attributes = array(), $https = false)
{
return static::link($url, $title, $attributes, $https, true);
}
/**
* Generate an HTTPS HTML link to an asset.
*
* @param string $url
* @param string $title
* @param array $attributes
* @return string
*/
public static function link_to_secure_asset($url, $title, $attributes = array())
{
return static::link_to_asset($url, $title, $attributes, true);
}
/**
* Generate an HTML link to a route.
*
* @param string $name
* @param string $title
* @param array $parameters
* @param array $attributes
* @return string
*/
public static function link_to_route($name, $title, $parameters = array(), $attributes = array(), $https = false)
{
return static::link(URL::to_route($name, $parameters, $https), $title, $attributes);
}
/**
* Generate an HTTPS HTML link to a route.
*
* @param string $name
* @param string $title
* @param array $parameters
* @param array $attributes
* @return string
*/
public static function link_to_secure_route($name, $title, $parameters = array(), $attributes = array())
{
return static::link_to_route($name, $title, $parameters, $attributes, true);
}
/**
* Generate an HTML mailto link.
*
* @param string $email
* @param string $title
* @param array $attributes
* @return string
*/
public static function mailto($email, $title = null, $attributes = array())
{
$email = static::email($email);
if (is_null($title))
{
$title = $email;
}
return '<a href="mailto:'.$email.'"'.static::attributes($attributes).'>'.static::entities($title).'</a>';
}
/**
* Obfuscate an e-mail address to prevent spam-bots from sniffing it.
*
* @param string $email
* @return string
*/
public static function email($email)
{
return str_replace('@', '@', static::obfuscate($email));
}
/**
* Generate an HTML image.
*
* @param string $url
* @param string $alt
* @param array $attributes
* @return string
*/
public static function image($url, $alt = '', $attributes = array())
{
$attributes['alt'] = static::entities($alt);
return '<img src="'.static::entities(URL::to_asset($url)).'"'.static::attributes($attributes).'>';
}
/**
* Generate an ordered list.
*
* @param array $list
* @param array $attributes
* @return string
*/
public static function ol($list, $attributes = array())
{
return static::list_elements('ol', $list, $attributes);
}
/**
* Generate an un-ordered list.
*
* @param array $list
* @param array $attributes
* @return string
*/
public static function ul($list, $attributes = array())
{
return static::list_elements('ul', $list, $attributes);
}
/**
* Generate an ordered or un-ordered list.
*
* @param string $type
* @param array $list
* @param array $attributes
* @return string
*/
private static function list_elements($type, $list, $attributes = array())
{
$html = '';
foreach ($list as $key => $value)
{
$html .= (is_array($value)) ? static::list_elements($type, $value) : '<li>'.static::entities($value).'</li>';
}
return '<'.$type.static::attributes($attributes).'>'.$html.'</'.$type.'>';
}
/**
* Build a list of HTML attributes.
*
* @param array $attributes
* @return string
*/
public static function attributes($attributes)
{
$html = array();
foreach ($attributes as $key => $value)
{
// Assume numeric-keyed attributes to have the same key and value.
// Example: required="required", autofocus="autofocus", etc.
if (is_numeric($key))
{
$key = $value;
}
if ( ! is_null($value))
{
$html[] = $key.'="'.static::entities($value).'"';
}
}
return (count($html) > 0) ? ' '.implode(' ', $html) : '';
}
/**
* Obfuscate a string to prevent spam-bots from sniffing it.
*
* @param string $value
* @return string
*/
public static function obfuscate($value)
{
$safe = '';
foreach (str_split($value) as $letter)
{
switch (rand(1, 3))
{
// Convert the letter to its entity representation.
case 1:
$safe .= '&#'.ord($letter).';';
break;
// Convert the letter to a Hex character code.
case 2:
$safe .= '&#x'.dechex(ord($letter)).';';
break;
// No encoding.
case 3:
$safe .= $letter;
}
}
return $safe;
}
/**
* Magic Method for handling dynamic static methods.
*/
public static function __callStatic($method, $parameters)
{
// Handle the dynamic creation of links to secure routes.
if (strpos($method, 'link_to_secure_') === 0)
{
array_unshift($parameters, substr($method, 15));
return forward_static_call_array('HTML::link_to_secure_route', $parameters);
}
// Handle the dynamic creation of links to routes.
if (strpos($method, 'link_to_') === 0)
{
array_unshift($parameters, substr($method, 8));
return forward_static_call_array('HTML::link_to_route', $parameters);
}
throw new \Exception("Static method [$method] is not defined on the HTML class.");
}
}