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_filters.php
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<?php namespace ProcessWire;
$view = $this->wire($this->api_var);
// explode string by a separator + trim + remove empty items
function stringToArray($str, $separator, $format = 'string')
{
if (strpos($str, $separator) === false) {
return false;
}
$arr = explode($separator, $str);
$arr = array_map('trim', $arr); //trim whitespace
// $arr = array_filter($arr, 'trim'); // remove empty items (removes 0x200 too!)
$arr = array_filter($arr, function ($value) {
return ($value !== null && $value !== false && $value !== '');
});
if ($format === 'int') {
$arr = array_map('intval', $arr);
}
return $arr;
}
// Fix for empty localname
// language name or id can be passed to retrieve localname in other languages
// $page->localname:'dutch'
// https://processwire.com/talk/topic/10742-find-page-name-field-in-non-default-language/
$view->addFilter('localname', function ($p, $lang = null) {
if (!($p instanceof Page)) {
return false;
}
if (null === $lang) {
$lang = wire('user')->language;
}
$out = $p->localName($lang);
return '' !== $out ? $out : $p->name;
});
/**
* srcset filter for LazySizes
* IMPORTANT - add to CSS: img[data-sizes="auto"] { display: block; width: 100%; }
* eg. <img src="..." data-srcset="{$page->images->first()|srcset:'540x320,*3,/2', array('upscaling' => false)|noescape}" data-sizes="auto" alt="" class="lazyload" />
*/
$view->addFilter('srcset', function ($img, $sets = null, $options = null) use ($view) {
$srcSetString = '';
$imgSizes = array();
$srcSets = array();
if (!($img instanceof Pageimage) || null === $sets) {
return false;
}
$srcsetArray = stringToArray($sets, ',');
if (!is_array($srcsetArray)) {
return false;
}
// get sets in array format
for ($ii = 0, $iiMax = count($srcsetArray); $ii < $iiMax; $ii++) {
$set = $srcsetArray[$ii];
$currentSize = false;
if ($set === '0x0') {
continue;
}
// first item must be width x height string (no multiplier nor divisor)
if ($ii === 0) {
// stop if it's not in WxH format
if (strpos($set, 'x') === false) {
// if it's only a number, assume Wx0
if (is_numeric($set) && (int)$set > 0) {
$set .= 'x0';
} elseif ($set === 'original') { // if it's "original", add current image dimensions (eg. for Croppable Image 3 module)
$set = $img->width . '_originalx' . $img->height;
} else {
return false;
}
}
$currentSize = stringToArray($set, 'x', 'int');
} else {
if (strpos($set, '/') === 0) {
// divisor, eg. "/3" - calculate values from first item of $imgSizes
$divisor = (double)ltrim($set, '/');
if ($divisor > 0) {
$currentSize = array_map(function ($item) use ($divisor) {
return (int)$item / $divisor;
}, reset($imgSizes));
}
} elseif (strpos($set, '*') === 0) {
// multiplier, eg. "*3" - calculate values from first item of $imgSizes
$multiplier = (double)ltrim($set, '*');
if ($multiplier > 0) {
$currentSize = array_map(function (&$item) use ($multiplier) {
return (int)$item * $multiplier;
}, reset($imgSizes));
}
} else {
// no divisor nor multiplier
$currentSize = stringToArray($set, 'x', 'int');
}
}
if ($currentSize) {
$imgSizes[] = $currentSize;
}
}
if (empty($imgSizes)) {
return false;
}
// create associative array of resized images, use widths as keys
foreach ($imgSizes as $set) {
$currentImage = $img->size($set[0], $set[1], $options);
$srcSets[$currentImage->width] = $currentImage->url;
}
ksort($srcSets);
// build srcset string
foreach ($srcSets as $width => $url) {
$srcSetString .= $url . ' ' . $width . 'w,';
}
$view->savetemp($srcSets);
return rtrim($srcSetString, ',');
});
// set temporary variable and return original data
// variable can be used as $gettemp() afterwards
$view->addFilter('savetemp', function ($data) use ($view) {
$view->savetemp($data);
return $data;
});
/**
* Read SVG file - Experimental: do not use in production
*
* todo
*
* remove hardcoded /images directory
* remove existing width/height if $size is set
* documentation
*/
$view->addFilter('readsvg', function ($path, $size = null, $expiration = 300) {
$varName = wire('sanitizer')->varName($path);
// wire('cache')->delete($varName);
return wire('cache')->get($varName, $expiration, function () use ($path, $size) {
// check if full path is supplied
if (substr($path, 0, 1) !== '/') {
$path = wire('config')->paths->templates . 'images/' . $path;
}
$varName = file_get_contents($path);
if (null !== $size && !empty($size)) {
// if height is not set, use width
$size = is_array($size) ? $size : array($size, $size);
// third param = multiplier
$multiplier = isset($size[2]) ? $size[2] : 1;
$width = round($size[0] * $multiplier);
$height = round(isset($size[1]) ? $size[1] * $multiplier : $width);
$varName = str_replace('<svg ', '<svg width="' . $width . '" height="' . $height . '" ', $varName);
}
return $varName;
});
});
/**
* Check if a Select Options field on a page has a given option selected.
*
* @param $p \ProcessWire\Page
* @param $field_with_key string field name and option id/value/title with dot notation,
* eg. "page_options.3" or "page_options.hide_header" or "page_options.Hide header"
* in "3=hide_header|Hide header"
*
* @return bool
*/
$view->addFilter('optionchecked', function ($p, $field_with_key = '') {
if (!($p instanceof Page) || !strpos($field_with_key, '.') > 0) {
return false;
}
$arr = explode('.', $field_with_key);
$f = trim($arr[0]); // string chunk until the first dot
if (!$p->template->hasField($f)) {
return false;
}
$key = substr($field_with_key, strlen($f) + 1); // rest of the string
$selector = is_numeric($key) ? $key : 'value|title=' . htmlentities($key);
return $p->{$f}->has($selector);
});
// return a default value if empty or falsy value passed
// {$page->product_description|default:'No description is available for this product.'}
$view->addFilter('default', function ($str = '', $default = '') {
return strlen($str) > 0 ? $str : $default;
});
/**
* Replace "((item))" with $replacements['item'].
* If $replacements is not an array then the getlines filter will be applied to it.
*
* @param array|string $replacements
*
* @return string
*/
$view->addFilter('replacesubs', function ($data, $replacements) use ($view) {
if (!is_array($replacements)) {
// try to parse as textarea lines
$replacements = $view->invokeFilter('getlines', array($replacements));
}
if (!empty($replacements)) {
// change keys to ((key))
$arr = array();
foreach ($replacements as $k => $v) {
$arr['((' . $k . '))'] = $v;
unset($replacements[$k]);
}
$data = strtr($data, $arr);
}
return $data;
});
/**
* filter replacetokens (for CKEditor plugin Token Replacement)
*/
$view->addFilter('replacetokens', function ($data, $tokenStart = '${', $tokenEnd = '}') {
$config = \ProcessWire\wire('config');
if (!isset($config->tokens) || !is_array($config->tokens)) {
return $data;
}
$search = array_map(function ($item) use ($tokenStart, $tokenEnd) {
return $tokenStart . $item . $tokenEnd;
}, array_keys($config->tokens));
$replace = array_values($config->tokens);
return str_replace($search, $replace, $data);
});
$view->addFilter('activeclass', function ($currentPage, $className = 'active') {
$p = $this->wire('page');
return ($p == $currentPage || $p->parentsUntil(1)->has($currentPage)) ? $className : '';
});
// add various classes to <body>, eg id, template, language, home
$view->addFilter('bodyclass', function ($p) {
$id = $p->id;
$class = '';
if (!empty($id)) {
$class = array();
$view = $this->wire($this->api_var);
$class[] = ($id == 1) ? 'home' : 'page-' . $id;
if (!in_array($p->parent->id, array(0, 1))) {
$class[] = 'parent-' . $p->parent->id;
}
if ($pageNum = wire('input')->pageNum) {
if ($pageNum > 1) {
$class[] = 'pagenum-' . $pageNum;
}
}
if ($this->wire('user')->language) {
$class[] = 'lang-' . $this->wire('user')->language->name;
}
$class[] = 'template-' . $p->template->name;
if ($p->body_class) {
$custom_classes = (array)$p->body_class;
$class = array_merge($class, $custom_classes);
}
// if there's a view file, add its file name
if (isset($view->viewFile)) {
$viewFile = explode('/', $view->viewFile);
$class[] = 'v-' . $this->wire('sanitizer')->pageName(end($viewFile));
}
$class = implode(' ', $class);
}
return $class;
});
// returns a selector built from IDs (eg. "id=1045|1033|1020")
$view->addFilter('getselector', function ($pArr = null) {
if (null === $pArr || !($pArr instanceof PageArray)) {
return false;
}
return 'id=' . $pArr->id('|');
});
$view->addFilter('getpage', function ($selector = null) {
if (null === $selector) {
return false;
}
return $this->wire('pages')->get($selector);
});
$view->addFilter('getpages', function ($selector = null, $extraSelector = null) {
if (null === $selector) {
return false;
}
if ($selector instanceof PageArray) {
return $selector->filter($extraSelector);
}
if (null !== $extraSelector) {
$selector .= ',' . $extraSelector;
}
return $this->wire('pages')->find($selector);
});
/**
* Returns child pages, applied to a selector or a Page.
* eg. (1023|getchildren:'limit=3')
* eg. ($page|getchildren:'limit=3')
*/
$view->addFilter('getchildren', function ($selector = null, $extraSelector = '') use ($view) {
if ($selector instanceof Page) {
return $selector->children($extraSelector);
}
$p = $view->invokeFilter('getpage', $selector);
if ($p instanceof Page) {
return $p->children($extraSelector);
}
return false;
});
// alias for "getchildren"
$view->addFilter('children', function ($selector = null, $extraSelector = '') use ($view) {
return $view->invokeFilter('getchildren', func_get_args());
});
$view->addFilter('renderpager', function ($pArr = null, $options = null) {
if (null === $pArr || !($pArr instanceof PageArray)) {
return false;
}
$view = $this->wire($this->api_var);
$paginationSettings = array(
'numPageLinks' => 10, // Default: 10
'getVars' => array(), // Default: empty array
'baseUrl' => '', // Default: empty
'listMarkup' => "<ul class='pagination'>{out}</ul>",
'itemMarkup' => "<li class='{class}'>{out}</li>",
'linkMarkup' => "<a href='{url}'><span>{out}</span></a>",
'nextItemLabel' => '→',
'previousItemLabel' => '←',
'separatorItemLabel' => '',
'separatorItemClass' => '',
'nextItemClass' => 'next',
'previousItemClass' => 'previous',
'lastItemClass' => 'last',
'currentItemClass' => 'active'
);
// merge common defaults from $view->renderPagerDefaults (eg. ready.php)
$paginationSettings = array_merge($paginationSettings,
isset($view->renderPagerDefaults) ? $view->renderPagerDefaults : array());
if (null !== $options) {
if (is_array($options)) { // merge user options
$paginationSettings = array_merge($paginationSettings, $options);
} elseif (is_numeric($options)) { // only a number is passed, set numPageLinks to it
$paginationSettings['numPageLinks'] = $options;
}
}
return $pArr->renderPager($paginationSettings);
});
// alias for "renderpager"
$view->addFilter('pager', function () use ($view) {
return $view->invokeFilter('renderpager', func_get_args());
});
$view->addFilter('breadcrumb', function ($p = null, $args = null) {
if (null === $p) {
return false;
}
if (!is_array($args)) {
$args = array($args);
}
$markup = '';
$view = $this->wire($this->api_var);
$args = array_merge($args, isset($view->breadcrumbDefaults) ? $view->breadcrumbDefaults : array());
$root = isset($args['root']) ? $args['root'] : 1;
$addHome = isset($args['addHome']) ? $args['addHome'] : true;
$addCurrent = isset($args['addCurrent']) ? $args['addCurrent'] : false;
$addCurrentLink = isset($args['addCurrentLink']) ? $args['addCurrentLink'] : false;
$class = isset($args['class']) ? $args['class'] : 'breadcrumb';
$id = isset($args['id']) ? $args['id'] : '';
$addAttributes = isset($args['addAttributes']) ? true : false;
$field = isset($args['field']) ? $args['field'] : 'title';
if ('' !== $id) {
$id = ' id="' . $id . '"';
}
if ('' !== $class) {
$class = ' class="' . $class . '"';
}
if ($root instanceof Page) {
$root = $root->id;
}
// return if current page is not below root
if ($this->wire('pages')->get($root)->find($p->id)->count() === 0) {
return false;
}
if ($addHome) {
$parents = $this->wire('pages')->get($root)->and($p->parentsUntil($root));
} else {
$parents = $p->parentsUntil($root);
}
// do not attempt to display breadcrumb if there are no items
if ($parents->count() === 0) {
return false;
}
$getAttributes = function ($str) use ($addAttributes) {
if ($addAttributes) {
return ' data-page="' . $str . '" ';
}
};
foreach ($parents as $parent) {
$markup .= '<li' . $getAttributes($parent->id) . '><a href="' . $parent->url . '">' . $parent->get($field) . '</a></li>';
}
if ($addCurrent) {
$markup .= '<li' . $getAttributes($p->id) . '>';
$markup .= $addCurrentLink ? '<a href="' . $p->url . '">' . $p->get($field) . '</a>' : '<span>' . $p->get($field) . '</span>';
$markup .= '</li>';
}
return '<ul' . $id . $class . '>' . $markup . '</ul>';
});
// get page field
// use getParent if PageArray is passed
$view->addFilter('get', function ($selector = null, $field = 'title') {
if (null === $selector) {
return false;
}
// needed for $pageArray|getParent|get to work
if ($selector instanceOf Page) {
$selector = $selector->id;
}
$page = $this->wire('pages')->get($selector);
if (!$page->id) {
return false;
}
if ($page->$field instanceof Pageimages) // if (is_array($page->$field))
{
$value = $page->$field->first();
} else {
$value = $page->$field;
}
return $value;
});
// get first item of an array
$view->addFilter('first', function ($arr = null) {
return is_array($arr) ? reset($arr) : $arr;
});
// get first key of an array
$view->addFilter('firstkey', function ($arr = null) {
if (!is_array($arr)) {
return $arr;
}
reset($arr);
return key($arr);
});
// get last item of an array
$view->addFilter('last', function ($arr = null) {
return is_array($arr) ? end($arr) : $arr;
});
// get last key of an array
$view->addFilter('lastkey', function ($arr = null) {
if (!is_array($arr)) {
return $arr;
}
end($arr);
return key($arr);
});
/**
* Explode lines of a textarea field into an array.
* Empty lines and lines starting with "//" are skipped.
*
* @param string $data Field value
* @param string $filter comma separated values of keys to get
* @param string $separator separator for associative array
*
* @return array
*/
$view->addFilter('getlines', function ($source = null, $filter = '', $separator = '=', $language = null) use ($view) {
if (null === $source) {
return false;
}
$isMultiLang = is_object(wire('languages'));
$originalLang = 'default';
$user = wire('user');
if ($isMultiLang) {
$originalLang = $user->language->name;
if (null !== $language) {
$user->language = $language;
}
}
// source data can be set as [$pageID, $fieldName] to allow fallback to default language
if (is_array($source)) {
$pid = (int)$source[0];
$field = $source[1];
$data = \ProcessWire\wire('pages')->get($pid)->{$field};
} else {
$data = $source;
}
$out = array();
$comment_identifier = '//';
$lines = trim($data);
$lines = explode("\n", $lines);
if (!is_array($lines)) {
$lines = array($lines);
}
$lines = array_map('trim', $lines); //trim whitespace
$lines = array_filter($lines, 'trim'); // remove empty lines
$lines = array_values($lines); // rearrange array keys to avoid gap
if ('' !== $filter) {
$filter_data = explode(',', $filter);
$filter_data = array_map('trim', $filter_data); //trim whitespace
$filter_data = array_filter($filter_data, 'trim'); // remove empty lines
}
for ($i = 0, $iMax = count($lines); $i < $iMax; $i++) {
$line = $lines[$i];
$key = $i;
// skip items commented out
if (strpos(trim($line), $comment_identifier) === 0) {
continue;
}
if (strpos($line, $separator) !== false) {
$arr = explode($separator, $line, 2);
$arr = array_map('trim', $arr);
$key = $arr[0];
if (isset($filter_data) && !in_array($key, (array)$filter_data, true)) {
continue;
}
$line = $arr[1];
}
$out[$key] = $line;
}
$array_items = count($out);
if ($array_items === 1) {
// return only the value if the array has only 1 item
// enables inline usage without foreach
// $out = reset($out);
} elseif ($array_items === 0) {
// empty array (possibly nonexisting filter or no matching line in current language)
// try default language
if ($isMultiLang && $language !== 'default') {
return $view->invokeFilter('getlines', array($source, $filter, $separator, 'default'));
}
// $lines = '';
$lines = array();
}
if ($isMultiLang) {
$user->language = $originalLang;
}
return !empty($out) ? $out : $lines;
});
$view->addFilter('getline', function () use ($view) {
$out = $view->invokeFilter('getlines', func_get_args());
return is_array($out) ? reset($out) : $out;
});
/**
* Adds width, height and alt attributes to an image.
*
* @param string $except attributes to skip (eg. "-alt")
*/
$view->addFilter('imageattrs', function ($img, $except = null) {
$alt = ' alt="' . $img->description . '" ';
if (null !== $except) {
if (strpos($except, '-alt') !== false) {
$alt = '';
}
}
return 'width="' . $img->width . '" height="' . $img->height . '"' . $alt;
});
/**
* List array items with a separator
* Similar to the built-in "implode" filter but accepts string too
* {array($page->title, ($page->modified|date:'%Y'), $page->name)|list:'|','span'|noescape}
*
*/
$view->addFilter('list', function ($data, $separator = '', $tag = null) {
$out = $startTag = $endTag = '';
if (null !== $tag) {
$startTag = '<' . $tag . '>';
$endTag = '</' . $tag . '>';
}
$data = is_array($data) ? $data : array($data);
$data = array_filter($data); // skip empty items
foreach ($data as $item) {
$out .= $startTag . trim($item) . $endTag . $separator;
}
$out = rtrim($out, $separator); // remove last separator
return $out;
});
/**
* LazySizes helper filter
* Requires lazysizes.js added manually and adding the "lazyload" class to img
* https://github.com/aFarkas/lazysizes
*
* <img src="{$page->images->first()->width(900)|lazy|noescape}" alt="" class="lazyload" />
* <img src="{$page->images->first()->width(900)|lazy:3|noescape}" alt="" class="lazyload" />
*
*/
$view->addFilter('lazy', function ($img = null, $divisor = null, $type = 'img', $crop_preset = null) {
$divisor = null === $divisor ? 4 : (int)$divisor;
if (null === $img || !($img instanceof Pageimage) || $divisor <= 1) {
return false;
}
$markup = '';
// get width and height pixel values from the current resized image and resize the original
$imgSmall = $img->getOriginal()->size($img->width / $divisor, $img->height / $divisor, array('quality' => 70));
if ($type === 'img') {
$markup = $imgSmall->url . '" data-src="' . $img->url;
} elseif ($type === 'bg') {
$markup = 'style="background-image: url(\'' . $imgSmall->url . '\')' . '" data-bgset="' . $img->url . '"';
}
return $markup;
});
/**
* LazySizes helper filter for bgset plugin
* https://github.com/aFarkas/lazysizes/tree/gh-pages/plugins/bgset
*
* Requires lazysizes.js and ls.bgset.js added manually and adding the "lazyload" class to the element
*
* <div {$page->images->first()->width(900)|bgset|noescape}" alt="" class="lazyload"></div>
* <div {$page->images->first()->width(900)|bgset:4|noescape}" alt="" class="lazyload"></div>
* */
$view->addFilter('bgset', function () use ($view) {
$args = func_get_args();
if (!isset($args[1])) {
$args[1] = null;
}
$args[] = 'bg'; // ensure there's a second parameter
return $view->invokeFilter('lazy', $args);
});
// count PageArray
$view->addFilter('count', function ($selector = null) {
if (null === $selector) {
return false;
}
return ($selector instanceof PageArray) ? $selector->count() : $this->wire('pages')->find($selector)->count();
});
/**
* Generates markup for responsive iframe embed
*
* @param string $url the embed url
* @param array $args options
*
* @return string
*/
$view->addFilter('embediframe', function ($url, $args = null) {
if ('' === $url) {
return false;
}
$view = $this->wire($this->api_var);
$defaults = array(
'width' => 560,
'height' => 315,
'upscale' => true,
'attr' => '',
'wrapAttr' => 'class="embed-wrap"',
'srcAttr' => 'src',
'urlParams' => ''
);
$defaults = array_merge($defaults, isset($view->embediframeDefaults) ? $view->embediframeDefaults : array());
$args = is_array($args) ? array_merge($defaults, $args) : $defaults;
extract($args, EXTR_OVERWRITE);
$width = !is_int($width) ? 560 : $width;
$height = !is_int($height) ? 315 : $height;
if ($upscale === false) {
$wrapAttr .= ' style="max-width:' . $width . 'px;" ';
}
$ratio = round($height / $width * 100, 2);
return <<< HTML
<div $wrapAttr><div style="padding-bottom:$ratio%;"><iframe width="$width" height="$height" $srcAttr="$url$urlParams" $attr></iframe></div></div>
HTML;
});
// get parent
$view->addFilter('getparent', function ($selector = null) {
if (null === $selector) {
return false;
}
return ($selector instanceof PageArray) ? $selector->first()->parent() : $this->wire('pages')->get($selector)->parent();
});
// append data
$view->addFilter('append', function ($data = null, $newdata = null) {
if (null === $data || null === $newdata) {
return false;
}
if (is_array($data)) {
if (is_array($newdata)) {
$data = array_merge($data, $newdata);
} else {
$data[] = $newdata;
}
} else {
$data .= $newdata;
}
return $data;
});
// prepend data
$view->addFilter('prepend', function ($data = null, $newdata = null) {
if (null === $data || null === $newdata) {
return false;
}
if (is_array($data)) {
if (is_array($newdata)) {
$data = array_merge($newdata, $data);
} else {
array_unshift($data, $newdata);
}
} else {
$data = $newdata . $data;
}
return $data;
});
// inline background-image
$view->addFilter('bgimage', function ($img = null) {
if (null === $img) {
return false;
}
return 'style="background-image: url(\'' . $img->url . '\')"';
});
$view->addFilter('contains', function ($str = '', $search = '') {
return strpos($str, $search) !== false;
});
// Create group from PageArray based on $page field.
// returns an array of key (sanitized field value), title (field value) and items (array of pages)
$view->addFilter('group', function ($pages, $fieldname = null) {
if (null === $fieldname || !($pages instanceof \ProcessWire\PageArray)) {
return $pages;
}
$group = array();
for ($ii = 0; $ii < $pages->count(); $ii++) {
$p = $pages[$ii];
if ($p->template->hasField($fieldname)) {
$key = \ProcessWire\wire('sanitizer')->pageNameTranslate($p->{$fieldname});
if (!isset($group[$key])) {
$g = new \stdClass();
$g->key = $key;
$titleField = $p->{$fieldname};
if ($titleField instanceof \ProcessWire\SelectableOptionArray) {
$g->title = $titleField->title;
} else {
$g->title = $titleField;
}
$g->items = new \ProcessWire\PageArray;
$group[$key] = $g;
}
$group[$key]->items->add($p);
}
}
return $group;
});
//https://www.labnol.org/internet/light-youtube-embeds/27941/
$view->addFilter('embedyoutube', function ($url) {
$videoID = get_youtube_id_from_url($url);
return '<div class="youtube-player" data-id="' . $videoID . '"></div>';
});
// barDump (needs TracyDebugger module)
$view->addFilter('bd', function ($data = null) {
if (null !== $data && function_exists('bd')) {
bd($data);
}
});
// barDump long (needs TracyDebugger module)
$view->addFilter('bdl', function ($data = null) {
if (null !== $data && function_exists('bdl')) {
bdl($data);
}