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<?php
/*
* Copyright (c) 2011 mlunzena@uos.de, aklassen@uos.de
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*/
namespace Studip;
/**
* Represents an abstract interactable element.
*/
abstract class Interactable
{
public $label, $attributes;
/**
* Constructs a new element to interact e.g. button or link
*
* @param string $label the label of the button
* @param array $attributes the attributes of the button element
*/
final public function __construct($label, $attributes)
{
$this->label = $label;
$this->attributes = $attributes;
}
/**
* Magic method (triggered when invoking inaccessible methods in a static
* context) used to dynamically create an interactable element with an
* additional CSSclass. This works for every static method call matching:
* /^create(.+)/ The matched group is used as CSS class for the
* interactable element.
*
* @code
* echo Button::createSubmit();
*
* # => <button ... class="submit">...
* @endcode
*
* @param string $name name of the method being called
* @param array $args enumerated array containing the parameters
* passed to the $name'ed method
*
* @return Interactable returns a Button, if $name =~ /^create/
* @throws throws a BadMethodCallException if $name does not
* match
*/
public static function __callStatic($name, $args)
{
# only trigger, if $name =~ /^create/ and at least using $label
if (0 === strncasecmp($name, 'create', 6)) {
# instantiate button from arguments
$interactable = call_user_func_array([get_called_class(), 'create'], $args);
# but customize with class from $name:
$class = self::hyphenate(mb_substr($name, 6));
# a.) set name unless set
if (empty($args[1]) || !is_string($args[1])) {
$interactable->attributes['name'] = $class;
}
# b.) set/append CSS class
if (array_key_exists('class', $interactable->attributes)) {
$interactable->attributes['class'] .= " $class";
} else {
$interactable->attributes['class'] = $class;
}
return $interactable;
}
# otherwise bail out
throw new \BadMethodCallException();
}
/**
* Easy factory method to create an Interactable instance.
* All parameters are optional.
*
* @code
* // example using subclass Button
*
* echo Button::create();
* # => <button type="submit" name="ok">ok</button>
*
* echo Button::create('Yes')
* # => <button type="submit" name="yes">yes</button>
*
* echo Button::create('Yes', 'aName')
* # => <button type="submit" name="aName">yes</button>
*
* echo Button::create('Yes', array('a' => 1, 'b' => 2))
* # => <button type="submit" a="1" b="2" name="yes">yes</button>
*
* echo Button::create('Yes', 'aName', array('a' => 1, 'b' => 2)),
* # => <button type="submit" a="1" b="2" name="aName">yes</button>
* @endcode
*
* @param string $label the label of the current element
* @param string $trait the specific trait of the current element
* @param array $attributes the attributes of the button element
*
* @return Interactable element
*/
public static function create($label = NULL, $trait = NULL, $attributes = [])
{
$argc = func_num_args();
// if label is empty, use default
$label = $label ?: _('ok');
// if there are two parameters, there are two cases:
// 1.) label and trait OR
// 2.) label and attributes
//
// in the latter case, use parameter $trait as attributes
// and use the default for name
if ($argc === 2 && is_array($trait)) {
list($attributes, $trait) = [$trait, NULL];
}
$interactable = new static($label, $attributes);
$interactable->initialize($label, $trait, $attributes);
return $interactable;
}
/**
* Initialize an interactable element.
* The parameters to create are handed over to enable subclass
* specific customization.
*
* @param string $label the label of the current element
* @param string $trait the specific trait of the current element
* @param array $attributes the attributes of the button element
*/
abstract protected function initialize($label, $trait, $attributes);
/**
* Convenience method used for autocompletion hints by your
* editor.
*
* Without this method #__callStatic would do the same.
*
* @param string $label the label of the current element
* @param string $trait the specific trait of the current element
* @param array $attributes the attributes of the button element
*/
public static function createAccept($label = NULL, $trait = NULL, $attributes = [])
{
$args = func_num_args() ? func_get_args() : [_('Übernehmen')];
return self::__callStatic(__FUNCTION__, $args);
}
/**
* Convenience method used for autocompletion hints by your
* editor.
*
* Without this method #__callStatic would do the same.
*
* @param string $label the label of the current element
* @param string $trait the specific trait of the current element
* @param array $attributes the attributes of the button element
*/
public static function createEdit($label = NULL, $trait = NULL, $attributes = [])
{
$args = func_num_args() ? func_get_args() : [_('Bearbeiten')];
return self::__callStatic(__FUNCTION__, $args);
}
/**
* Convenience method used for autocompletion hints by your
* editor.
*
* Without this method #__callStatic would do the same.
*
* @param string $label the label of the current element
* @param string $trait the specific trait of the current element
* @param array $attributes the attributes of the button element
*/
public static function createCancel($label = NULL, $trait = NULL, $attributes = [])
{
$args = func_num_args() ? func_get_args() : [_('Abbrechen')];
return self::__callStatic(__FUNCTION__, $args);
}
/**
* Hyphenates the passed word.
*
* @param string $word word to be hyphenated
*
* @return string hyphenated word
*/
private static function hyphenate($word)
{
return mb_strtolower(preg_replace('/(?<=\w)([A-Z])/', '-\\1', $word));
}
}
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