284 lines
9.8 KiB
PHP
284 lines
9.8 KiB
PHP
<?php
|
|
/**
|
|
* This file is part of Pico. It's copyrighted by the contributors recorded
|
|
* in the version control history of the file, available from the following
|
|
* original location:
|
|
*
|
|
* <https://github.com/picocms/Pico/blob/master/lib/PicoTwigExtension.php>
|
|
*
|
|
* SPDX-License-Identifier: MIT
|
|
* License-Filename: LICENSE
|
|
*/
|
|
|
|
/**
|
|
* Pico's Twig extension to implement additional filters
|
|
*
|
|
* @author Daniel Rudolf
|
|
* @link http://picocms.org
|
|
* @license http://opensource.org/licenses/MIT The MIT License
|
|
* @version 2.0
|
|
*/
|
|
class PicoTwigExtension extends Twig_Extension
|
|
{
|
|
/**
|
|
* Current instance of Pico
|
|
*
|
|
* @see PicoTwigExtension::getPico()
|
|
* @var Pico
|
|
*/
|
|
private $pico;
|
|
|
|
/**
|
|
* Constructs a new instance of this Twig extension
|
|
*
|
|
* @param Pico $pico current instance of Pico
|
|
*/
|
|
public function __construct(Pico $pico)
|
|
{
|
|
$this->pico = $pico;
|
|
}
|
|
|
|
/**
|
|
* Returns the extensions instance of Pico
|
|
*
|
|
* @see Pico
|
|
*
|
|
* @return Pico the extension's instance of Pico
|
|
*/
|
|
public function getPico()
|
|
{
|
|
return $this->pico;
|
|
}
|
|
|
|
/**
|
|
* Returns the name of the extension
|
|
*
|
|
* @see Twig_ExtensionInterface::getName()
|
|
*
|
|
* @return string the extension name
|
|
*/
|
|
public function getName()
|
|
{
|
|
return 'PicoTwigExtension';
|
|
}
|
|
|
|
/**
|
|
* Returns a list of Pico-specific Twig filters
|
|
*
|
|
* @see Twig_ExtensionInterface::getFilters()
|
|
*
|
|
* @return Twig_SimpleFilter[] array of Pico's Twig filters
|
|
*/
|
|
public function getFilters()
|
|
{
|
|
return array(
|
|
'markdown' => new Twig_SimpleFilter('markdown', array($this, 'markdownFilter')),
|
|
'map' => new Twig_SimpleFilter('map', array($this, 'mapFilter')),
|
|
'sort_by' => new Twig_SimpleFilter('sort_by', array($this, 'sortByFilter')),
|
|
'link' => new Twig_SimpleFilter('link', array($this->pico, 'getPageUrl'))
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Returns a list of Pico-specific Twig functions
|
|
*
|
|
* @see Twig_ExtensionInterface::getFunctions()
|
|
*
|
|
* @return Twig_SimpleFunction[] array of Pico's Twig functions
|
|
*/
|
|
public function getFunctions()
|
|
{
|
|
return array(
|
|
'url_param' => new Twig_SimpleFunction('url_param', array($this->pico, 'getUrlParameter')),
|
|
'form_param' => new Twig_SimpleFunction('form_param', array($this->pico, 'getFormParameter'))
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Parses a markdown string to HTML
|
|
*
|
|
* This method is registered as the Twig `markdown` filter. You can use it
|
|
* to e.g. parse a meta variable (`{{ meta.description|markdown }}`).
|
|
* Don't use it to parse the contents of a page, use the `content` filter
|
|
* instead, what ensures the proper preparation of the contents.
|
|
*
|
|
* @see Pico::substituteFileContent()
|
|
* @see Pico::parseFileContent()
|
|
*
|
|
* @param string $markdown markdown to parse
|
|
* @param array $meta meta data to use for %meta.*% replacement
|
|
*
|
|
* @return string parsed HTML
|
|
*/
|
|
public function markdownFilter($markdown, array $meta = array())
|
|
{
|
|
$markdown = $this->getPico()->substituteFileContent($markdown, $meta);
|
|
return $this->getPico()->parseFileContent($markdown);
|
|
}
|
|
|
|
/**
|
|
* Returns a array with the values of the given key or key path
|
|
*
|
|
* This method is registered as the Twig `map` filter. You can use this
|
|
* filter to e.g. get all page titles (`{{ pages|map("title") }}`).
|
|
*
|
|
* @param array|Traversable $var variable to map
|
|
* @param mixed $mapKeyPath key to map; either a scalar or a
|
|
* array interpreted as key path (i.e. ['foo', 'bar'] will return all
|
|
* $item['foo']['bar'] values)
|
|
*
|
|
* @return array mapped values
|
|
*/
|
|
public function mapFilter($var, $mapKeyPath)
|
|
{
|
|
if (!is_array($var) && (!is_object($var) || !($var instanceof Traversable))) {
|
|
throw new Twig_Error_Runtime(sprintf(
|
|
'The map filter only works with arrays or "Traversable", got "%s"',
|
|
is_object($var) ? get_class($var) : gettype($var)
|
|
));
|
|
}
|
|
|
|
$result = array();
|
|
foreach ($var as $key => $value) {
|
|
$mapValue = $this->getKeyOfVar($value, $mapKeyPath);
|
|
$result[$key] = ($mapValue !== null) ? $mapValue : $value;
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Sorts an array by one of its keys or a arbitrary deep sub-key
|
|
*
|
|
* This method is registered as the Twig `sort_by` filter. You can use this
|
|
* filter to e.g. sort the pages array by a arbitrary meta value. Calling
|
|
* `{{ pages|sort_by([ "meta", "nav" ]) }}` returns all pages sorted by the
|
|
* meta value `nav`. The sorting algorithm will never assume equality of
|
|
* two values, it will then fall back to the original order. The result is
|
|
* always sorted in ascending order, apply Twigs `reverse` filter to
|
|
* achieve a descending order.
|
|
*
|
|
* @param array|Traversable $var variable to sort
|
|
* @param mixed $sortKeyPath key to use for sorting; either
|
|
* a scalar or a array interpreted as key path (i.e. ['foo', 'bar']
|
|
* will sort $var by $item['foo']['bar'])
|
|
* @param string $fallback specify what to do with items
|
|
* which don't contain the specified sort key; use "bottom" (default)
|
|
* to move these items to the end of the sorted array, "top" to rank
|
|
* them first, "keep" to keep the original order, or "remove" to remove
|
|
* these items
|
|
*
|
|
* @return array sorted array
|
|
*/
|
|
public function sortByFilter($var, $sortKeyPath, $fallback = 'bottom')
|
|
{
|
|
if (is_object($var) && ($var instanceof Traversable)) {
|
|
$var = iterator_to_array($var, true);
|
|
} elseif (!is_array($var)) {
|
|
throw new Twig_Error_Runtime(sprintf(
|
|
'The sort_by filter only works with arrays or "Traversable", got "%s"',
|
|
is_object($var) ? get_class($var) : gettype($var)
|
|
));
|
|
}
|
|
if (($fallback !== 'top') && ($fallback !== 'bottom') && ($fallback !== 'keep') && ($fallback !== "remove")) {
|
|
throw new Twig_Error_Runtime(
|
|
'The sort_by filter only supports the "top", "bottom", "keep" and "remove" fallbacks'
|
|
);
|
|
}
|
|
|
|
$twigExtension = $this;
|
|
$varKeys = array_keys($var);
|
|
$removeItems = array();
|
|
uksort($var, function ($a, $b) use ($twigExtension, $var, $varKeys, $sortKeyPath, $fallback, &$removeItems) {
|
|
$aSortValue = $twigExtension->getKeyOfVar($var[$a], $sortKeyPath);
|
|
$aSortValueNull = ($aSortValue === null);
|
|
|
|
$bSortValue = $twigExtension->getKeyOfVar($var[$b], $sortKeyPath);
|
|
$bSortValueNull = ($bSortValue === null);
|
|
|
|
if (($fallback === 'remove') && ($aSortValueNull || $bSortValueNull)) {
|
|
if ($aSortValueNull) {
|
|
$removeItems[$a] = $var[$a];
|
|
}
|
|
if ($bSortValueNull) {
|
|
$removeItems[$b] = $var[$b];
|
|
}
|
|
return ($aSortValueNull - $bSortValueNull);
|
|
} elseif ($aSortValueNull xor $bSortValueNull) {
|
|
if ($fallback === 'top') {
|
|
return ($aSortValueNull - $bSortValueNull) * -1;
|
|
} elseif ($fallback === 'bottom') {
|
|
return ($aSortValueNull - $bSortValueNull);
|
|
}
|
|
} elseif (!$aSortValueNull && !$bSortValueNull) {
|
|
if ($aSortValue != $bSortValue) {
|
|
return ($aSortValue > $bSortValue) ? 1 : -1;
|
|
}
|
|
}
|
|
|
|
// never assume equality; fallback to original order
|
|
$aIndex = array_search($a, $varKeys);
|
|
$bIndex = array_search($b, $varKeys);
|
|
return ($aIndex > $bIndex) ? 1 : -1;
|
|
});
|
|
|
|
if ($removeItems) {
|
|
$var = array_diff_key($var, $removeItems);
|
|
}
|
|
|
|
return $var;
|
|
}
|
|
|
|
/**
|
|
* Returns the value of a variable item specified by a scalar key or a
|
|
* arbitrary deep sub-key using a key path
|
|
*
|
|
* @param array|Traversable|ArrayAccess|object $var base variable
|
|
* @param mixed $keyPath scalar key or a
|
|
* array interpreted as key path (when passing e.g. ['foo', 'bar'],
|
|
* the method will return $var['foo']['bar']) specifying the value
|
|
*
|
|
* @return mixed the requested value or NULL when the given key or key path
|
|
* didn't match
|
|
*/
|
|
public static function getKeyOfVar($var, $keyPath)
|
|
{
|
|
if (!$keyPath) {
|
|
return null;
|
|
} elseif (!is_array($keyPath)) {
|
|
$keyPath = array($keyPath);
|
|
}
|
|
|
|
foreach ($keyPath as $key) {
|
|
if (is_object($var)) {
|
|
if ($var instanceof ArrayAccess) {
|
|
// use ArrayAccess, see below
|
|
} elseif ($var instanceof Traversable) {
|
|
$var = iterator_to_array($var);
|
|
} elseif (isset($var->{$key})) {
|
|
$var = $var->{$key};
|
|
continue;
|
|
} elseif (is_callable(array($var, 'get' . ucfirst($key)))) {
|
|
try {
|
|
$var = call_user_func(array($var, 'get' . ucfirst($key)));
|
|
continue;
|
|
} catch (BadMethodCallException $e) {
|
|
return null;
|
|
}
|
|
} else {
|
|
return null;
|
|
}
|
|
} elseif (!is_array($var)) {
|
|
return null;
|
|
}
|
|
|
|
if (isset($var[$key])) {
|
|
$var = $var[$key];
|
|
continue;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
return $var;
|
|
}
|
|
}
|