/**
* Constructs the parse tree from a string of bbcode markup.
*
* @param string $str the bbcode markup to parse
*/
public function parse($str)
{
$this->reset();
$parent = $this->treeRoot;
$tokenManager = new TokenManager($str);
$nodeid = 1;
$inTag = false;
while ($tokenManager->hasCurrent()) {
// tokens are either "[", "]" or a string that contains neither a opening bracket nor a closing bracket
if ($inTag) {
// this token should be a tag name
// explode by = in case there's an attribute
$pieces = explode('=', $tokenManager->getCurrent(), 2);
// check if it's a closing tag
if (substr($pieces[0], 0, 1) == "/") {
$tagName = substr($pieces[0], 1);
$closing = true;
} else {
$tagName = $pieces[0];
$closing = false;
}
if (($this->codeExists($tagName, isset($pieces[1])) || $closing && $this->codeExists($tagName, true)) && $tokenManager->hasNext() && $tokenManager->next() == "]") {
if ($closing) {
$closestParent = $parent->closestParentOfType($tagName);
if ($closestParent != null && $closestParent->hasParent()) {
// closing an element... move to this element's parent
$parent->getCodeDefinition()->decrementCounter();
$parent = $closestParent->getParent();
$tokenManager->advance();
$tokenManager->advance();
$inTag = false;
continue;
}
} else {
// new element
$el = new ElementNode();
$code = $this->getCode($tagName, isset($pieces[1]));
$code->incrementCounter();
$el->setNestDepth($code->getCounter());
$el->setCodeDefinition($code);
$el->setTagName($tagName);
$el->setNodeId($nodeid++);
if (isset($pieces[1])) {
$el->setAttribute($pieces[1]);
}
$parent->addChild($el);
$parent = $el;
$tokenManager->advance();
$tokenManager->advance();
$inTag = false;
continue;
}
}
// the opening bracket that sent us in here was really just plain text
$node = new TextNode("[");
$node->setNodeId($nodeid++);
$parent->addChild($node);
$inTag = false;
// treat this token as regular text, and let the next if...else structure handle it as regular text
}
if ($tokenManager->getCurrent() == "[") {
$inTag = true;
} else {
$node = new TextNode($tokenManager->getCurrent());
$node->setNodeId($nodeid++);
$parent->addChild($node);
}
$tokenManager->advance();
}
}
