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<?php
namespace gipfl\IcingaWeb2;
use InvalidArgumentException;
/**
* Icon helper class
*
* Should help to reduce redundant icon-lookup code. Currently with hardcoded
* icons only, could easily provide support for all of them as follows:
*
* $confFile = Icinga::app()
* ->getApplicationDir('fonts/fontello-ifont/config.json');
*
* $font = json_decode(file_get_contents($confFile));
* // 'icon-' is to be found in $font->css_prefix_text
* foreach ($font->glyphs as $icon) {
* // $icon->css (= 'help') -> 0x . dechex($icon->code)
* }
*/
class IconHelper
{
private $icons = [
'minus' => 'e806',
'trash' => 'e846',
'plus' => 'e805',
'cancel' => 'e804',
'help' => 'e85b',
'angle-double-right' => 'e87b',
'up-big' => 'e825',
'down-big' => 'e828',
'down-open' => 'e821',
];
private $mappedUtf8Icons;
private $reversedUtf8Icons;
private static $instance;
public function __construct()
{
$this->prepareIconMappings();
}
public static function instance()
{
if (self::$instance === null) {
self::$instance = new static;
}
return self::$instance;
}
public function characterIconName($character)
{
if (array_key_exists($character, $this->reversedUtf8Icons)) {
return $this->reversedUtf8Icons[$character];
} else {
throw new InvalidArgumentException('There is no mapping for the given character');
}
}
protected function hexToCharacter($hex)
{
return json_decode('"\u' . $hex . '"');
}
public function iconCharacter($name)
{
if (array_key_exists($name, $this->mappedUtf8Icons)) {
return $this->mappedUtf8Icons[$name];
} else {
return $this->mappedUtf8Icons['help'];
}
}
protected function prepareIconMappings()
{
$this->mappedUtf8Icons = [];
$this->reversedUtf8Icons = [];
foreach ($this->icons as $name => $hex) {
$character = $this->hexToCharacter($hex);
$this->mappedUtf8Icons[$name] = $character;
$this->reversedUtf8Icons[$character] = $name;
}
}
}
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