/**
* Constructor
*
* @param string $markup
* @param array $tokens
* @param FileSystem $fileSystem
*
* @throws \Liquid\LiquidException
*/
public function __construct($markup, array &$tokens, FileSystem $fileSystem = null)
{
$syntaxRegexp = new Regexp('/(\\w+)\\s*=\\s*(' . Liquid::get('QUOTED_FRAGMENT') . '+)/');
$filterSeperatorRegexp = new Regexp('/' . Liquid::get('FILTER_SEPARATOR') . '\\s*(.*)/');
$filterSplitRegexp = new Regexp('/' . Liquid::get('FILTER_SEPARATOR') . '/');
$filterNameRegexp = new Regexp('/\\s*(\\w+)/');
$filterArgumentRegexp = new Regexp('/(?:' . Liquid::get('FILTER_ARGUMENT_SEPARATOR') . '|' . Liquid::get('ARGUMENT_SEPARATOR') . ')\\s*(' . Liquid::get('QUOTED_FRAGMENT') . ')/');
$this->filters = array();
if ($filterSeperatorRegexp->match($markup)) {
$filters = $filterSplitRegexp->split($filterSeperatorRegexp->matches[1]);
foreach ($filters as $filter) {
$filterNameRegexp->match($filter);
$filtername = $filterNameRegexp->matches[1];
$filterArgumentRegexp->matchAll($filter);
$matches = Liquid::arrayFlatten($filterArgumentRegexp->matches[1]);
array_push($this->filters, array($filtername, $matches));
}
}
if ($syntaxRegexp->match($markup)) {
$this->to = $syntaxRegexp->matches[1];
$this->from = $syntaxRegexp->matches[2];
} else {
throw new LiquidException("Syntax Error in 'assign' - Valid syntax: assign [var] = [source]");
}
}
/**
* Render the tag
*
* @param Context $context
*
* @throws \Liquid\LiquidException
* @return string
*/
public function render(Context $context)
{
$context->push();
$logicalRegex = new Regexp('/\\s+(and|or)\\s+/');
$conditionalRegex = new Regexp('/(' . Liquid::get('QUOTED_FRAGMENT') . ')\\s*([=!<>a-z_]+)?\\s*(' . Liquid::get('QUOTED_FRAGMENT') . ')?/');
$result = '';
foreach ($this->blocks as $block) {
if ($block[0] == 'else') {
$result = $this->renderAll($block[2], $context);
break;
}
if ($block[0] == 'if' || $block[0] == 'elsif') {
// Extract logical operators
$logicalRegex->matchAll($block[1]);
$logicalOperators = $logicalRegex->matches;
$logicalOperators = $logicalOperators[1];
// Extract individual conditions
$temp = $logicalRegex->split($block[1]);
$conditions = array();
foreach ($temp as $condition) {
if ($conditionalRegex->match($condition)) {
$left = isset($conditionalRegex->matches[1]) ? $conditionalRegex->matches[1] : null;
$operator = isset($conditionalRegex->matches[2]) ? $conditionalRegex->matches[2] : null;
$right = isset($conditionalRegex->matches[3]) ? $conditionalRegex->matches[3] : null;
array_push($conditions, array('left' => $left, 'operator' => $operator, 'right' => $right));
} else {
throw new LiquidException("Syntax Error in tag 'if' - Valid syntax: if [condition]");
}
}
if (count($logicalOperators)) {
// If statement contains and/or
$display = $this->interpretCondition($conditions[0]['left'], $conditions[0]['right'], $conditions[0]['operator'], $context);
foreach ($logicalOperators as $k => $logicalOperator) {
if ($logicalOperator == 'and') {
$display = $display && $this->interpretCondition($conditions[$k + 1]['left'], $conditions[$k + 1]['right'], $conditions[$k + 1]['operator'], $context);
} else {
$display = $display || $this->interpretCondition($conditions[$k + 1]['left'], $conditions[$k + 1]['right'], $conditions[$k + 1]['operator'], $context);
}
}
} else {
// If statement is a single condition
$display = $this->interpretCondition($conditions[0]['left'], $conditions[0]['right'], $conditions[0]['operator'], $context);
}
if ($display) {
$result = $this->renderAll($block[2], $context);
break;
}
}
}
$context->pop();
return $result;
}
