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Transphporm\Property\Repeat
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<?php
/* @description Transformation Style Sheets - Revolutionising PHP templating *
* @author Tom Butler tom@r.je *
* @copyright 2017 Tom Butler <tom@r.je> | https://r.je/ *
* @license http://www.opensource.org/licenses/bsd-license.php BSD License *
* @version 1.2 */
namespace Transphporm\Property;
class Repeat implements \Transphporm\Property {
private $functionSet;
private $elementData;
private $line;
private $filePath;
public function __construct(\Transphporm\FunctionSet $functionSet, \Transphporm\Hook\ElementData $elementData, &$line, \Transphporm\FilePath $filePath) {
$this->functionSet = $functionSet;
$this->elementData = $elementData;
$this->line = &$line;
$this->filePath = $filePath;
}
public function run(array $values, \DomElement $element, array $rules, \Transphporm\Hook\PseudoMatcher $pseudoMatcher, array $properties = []) {
$values = $this->fixEmpty($values);
if ($element->getAttribute('transphporm') === 'added') return $element->parentNode->removeChild($element);
$this->handleContentModeAppend($element, $rules);
$max = $this->getMax($values);
$count = 0;
$repeat = $this->getRepeatValue($values, $max);
//Don't run repeat on the cloned element or it will loop forever
unset($rules['repeat']);
$hook = $this->createHook($rules, $pseudoMatcher, $properties);
foreach ($repeat as $key => $iteration) {
if ($count+1 > $max) break;
$clone = $this->cloneElement($element, $iteration, $key, $count++);
//Re-run the hook on the new element, but use the iterated data
if ($hook) $hook->run($clone);
}
//Remove the original element
$element->parentNode->removeChild($element);
return false;
}
private function handleContentModeAppend(\DomElement $element, array $rules) {
$contentMode = (isset($rules['content-mode'])) ? $rules['content-mode']->read() : 'replace';
if ($contentMode == 'append') {
$clone = $element->cloneNode(true);
$clone->setAttribute('transphporm', 'immutable');
$element->parentNode->insertBefore($clone, $element);
}
}
private function getRepeatValue($values, &$max) {
$mode = $this->getMode($values);
$repeat = $values[0];
if ($mode !== 'each') { // $mode === 'loop'
$repeat = range($values[0], $max);
$max++;
}
return $repeat;
}
private function getMode($args) {
return isset($args[2]) ? $args[2] : 'each';
}
private function fixEmpty($value) {
if (empty($value[0])) $value[0] = [];
return $value;
}
private function cloneElement($element, $iteration, $key, $count) {
$clone = $element->cloneNode(true);
$this->tagElement($clone, $count);
$this->elementData->bind($clone, $iteration, 'iteration');
$this->elementData->bind($clone, $key, 'key');
$element->parentNode->insertBefore($clone, $element);
return $clone;
}
private function tagElement($element, $count) {
//Mark all but one of the nodes as having been added by transphporm, when the hook is run again, these are removed
if ($count > 0) $element->setAttribute('transphporm', 'added');
}
private function getMax($values) {
return isset($values[1]) ? $values[1] : PHP_INT_MAX;
}
private function createHook($newRules, $pseudoMatcher, $properties) {
// Only create a hook if there are remaining properties to process
// for this rule e.g. repeat: data(); content: "foo"
// The content property still needs to be used
// But for rules that are just { repeat: data(); } this can be skipped.
if (empty($newRules)) return false;
$hook = new \Transphporm\Hook\PropertyHook($newRules, $this->line, null, $this->line, $pseudoMatcher, new \Transphporm\Parser\Value($this->functionSet), $this->functionSet, $this->filePath);
foreach ($properties as $name => $property) $hook->registerProperty($name, $property);
return $hook;
}
}