/**
* Compile the specified tag and return PHP code to handle it.
*
* @param XenForo_Template_Compiler The invoking compiler
* @param string Name of the tag called
* @param array Attributes for the tag (may be empty)
* @param array Nodes (tags/curlies/text) within this tag (may be empty)
* @param array Compilation options
*
* @return string
*/
public function compile(XenForo_Template_Compiler $compiler, $tag, array $attributes, array $children, array $options)
{
if ($tag == 'contentcheck') {
throw $compiler->getNewCompilerException(new XenForo_Phrase('contentcheck_tag_found_that_was_not_direct_child_of_an_if_tag_with'));
} else {
if ($tag != 'if') {
throw $compiler->getNewCompilerException(new XenForo_Phrase('else_or_else_if_tag_not_found_that_was_not_direct_child_of_an_if_tag'));
}
}
if (empty($options['allowRawStatements'])) {
throw $compiler->getNewCompilerException(new XenForo_Phrase('x_tags_only_used_where_full_statements_allowed', array('tag' => 'if')));
}
$parts = array(0 => array('is' => isset($attributes['is']) ? $attributes['is'] : '', 'hascontent' => isset($attributes['hascontent']) ? $attributes['hascontent'] : '', 'segments' => array(), 'line' => $compiler->getLineNumber()));
$partKey = 0;
$haveElse = false;
foreach ($children as $child) {
if ($compiler->isSegmentNamedTag($child, 'elseif')) {
if ($haveElse) {
throw $compiler->getNewCompilerException(new XenForo_Phrase('else_if_tag_found_after_else_tag'), $child);
}
if (!empty($child['children'])) {
throw $compiler->getNewCompilerException(new XenForo_Phrase('else_if_tags_may_not_have_children'), $child);
}
$partKey++;
$parts[$partKey] = array('is' => isset($child['attributes']['is']) ? $child['attributes']['is'] : '', 'hascontent' => isset($child['attributes']['hascontent']) ? $child['attributes']['hascontent'] : '', 'segments' => array(), 'line' => $child['line']);
} else {
if ($compiler->isSegmentNamedTag($child, 'else')) {
if (!empty($child['children'])) {
throw $compiler->getNewCompilerException(new XenForo_Phrase('else_tags_may_not_have_children'), $child);
}
if ($haveElse) {
throw $compiler->getNewCompilerException(new XenForo_Phrase('only_one_else_tag_allowed_per_if_tag'), $child);
}
$haveElse = true;
$partKey++;
$parts[$partKey] = array('else' => true, 'segments' => array(), 'line' => $child['line']);
} else {
$parts[$partKey]['segments'][] = $child;
}
}
}
$ifStatement = $compiler->getNewRawStatement();
$prependCheckStatements = $compiler->getNewRawStatement();
$allCheckVars = array();
foreach ($parts as $partKey => $part) {
$conditionType = $partKey == 0 ? 'if' : 'else if';
if (!empty($part['is'])) {
$condition = $compiler->parseConditionExpression($part['is'], $options);
$ifStatement->addStatement($conditionType . ' ' . $condition . "\n{\n")->addStatement($compiler->compileSegments($part['segments'], $options))->addStatement("}\n");
} else {
if (!empty($part['hascontent'])) {
$childStatement = $compiler->getNewStatementCollection();
$checkVars = array();
foreach ($part['segments'] as $segment) {
if ($compiler->isSegmentNamedTag($segment, 'contentcheck')) {
$prependCheckStatements->addStatement($compiler->compileIntoVariable($segment['children'], $checkVar, $options));
$childStatement->addStatement('$' . $checkVar);
$checkVars[] = $checkVar;
$allCheckVars[] = '$' . $checkVar;
} else {
$childStatement->addStatement($compiler->compileSegment($segment, $options));
}
}
if (!$checkVars) {
throw $compiler->getNewCompilerException(new XenForo_Phrase('cannot_have_content_checking_if_tag_without_contentcheck_part'), $part['line']);
}
$conditionParts = array();
foreach ($checkVars as $checkCondition) {
$conditionParts[] = 'trim($' . $checkCondition . ") !== ''";
}
$checkCond = implode(' || ', $conditionParts);
$ifStatement->addStatement("{$conditionType} ({$checkCond})\n{\n")->addStatement($childStatement)->addStatement("}\n");
} else {
if (!empty($part['else'])) {
$ifStatement->addStatement("else\n{\n")->addStatement($compiler->compileSegments($part['segments'], $options))->addStatement("}\n");
} else {
throw $compiler->getNewCompilerException(new XenForo_Phrase('invalid_if_or_else_if_tag_missing_is_or_hascontent'), $part['line']);
}
}
}
}
$prependCheckStatements->addStatement($ifStatement);
if ($allCheckVars) {
$prependCheckStatements->addStatement("unset(" . implode(', ', $allCheckVars) . ");\n");
}
return $prependCheckStatements;
}
