/**
* This method is called after initializing the data.
*
* @param array $options - Options.
*
* @throws ValidationException
*
* @return void
*/
public function validate(array $options = [])
{
$options = array_replace(['validateMinChildren' => true, 'validateMaxChildren' => true, 'validateParentMandatory' => true, 'validateParentMustNotBeSet' => true], $options);
$countChildren = $this->countChildren();
if ($options['validateMinChildren'] && ($min = $this->getValidationConfig('minChildren')) !== null && $min > $countChildren) {
throw ValidationException::create('Children must be, at least, ' . $min . '. Currently, node "' . $this->getId() . '" has ' . $countChildren . ' children.');
}
if ($options['validateMaxChildren'] && ($max = $this->getValidationConfig('maxChildren')) !== null && $max < $countChildren) {
throw ValidationException::create('Children cannot exceed a maximum of ' . $max . '. Currently, node "' . $this->getId() . '" has ' . $countChildren . ' children.');
}
if ($options['validateParentMandatory'] && $this->getValidationConfig('parentMandatory') && $this->getParent() === null) {
throw ValidationException::create('Node "' . $this->getId() . '" must have a Parent!');
}
if ($options['validateParentMustNotBeSet'] && $this->getValidationConfig('parentMustNotBeSet') && $this->getParent() !== null) {
throw ValidationException::create('Node "' . $this->getId() . '" must NOT have a Parent!');
}
}
/**
* Creates a Node instance through the node factory.
*
* @param array $data - Node Data.
* @param array $options - Options.
*
* @throws ValidationException
*
* @return NodeInterface
*/
protected function createNodeInstance(array $data, array $options = []) : NodeInterface
{
$factory = $this->getNodeFactory();
$node = $factory($data, $options);
if (!is_object($node) || !$node instanceof NodeInterface) {
throw ValidationException::create('Node Factory must return an instance of NodeInterface.');
}
$this->_nodeRegistry[$node->getId()] = $node;
return $node;
}
/**
* Writes the data into a graphviz image.
*
* @param array $data - Data.
* @param array $options - Options.
*
* @throws ValidationException
* @throws ExportException
*
* @return void
*/
public function write(array $data, array $options)
{
if (!$this->getUtils()->isDotInstalled()) {
throw ExportException::create('Can\'t export to a Graphviz image because "dot" binary is not available. Verify that the ' . '"graphviz" package is installed on your system.');
}
if (!isset($data['node']) || !$data['node'] instanceof NodeInterface) {
throw ValidationException::create('Data attribute "node" must be an instance of IronEdge\\Component\\Graphs\\Node\\NodeInterface.');
}
if (!isset($options['path']) || !is_string($options['path']) || $options['path'] === '') {
throw ValidationException::create('To be able to export this graph to a graphviz image, you must set option "path" with a string ' . 'with the path to the target file.');
}
/** @var NodeInterface $graph */
$graph = $data['node'];
$file = $options['path'];
$graphvizCode = 'digraph ' . $graph->getId() . ' {' . PHP_EOL;
$graphAttributes = $graph->getMetadataAttr('graphviz.nodeAttributes', []);
if ($graphAttributes) {
foreach ($graphAttributes as $k => $v) {
$graphvizCode .= ' ' . $k . '=' . $v . ';' . PHP_EOL;
}
$graphvizCode .= PHP_EOL;
}
$graphvizCode .= $this->generateNodeCode($graph);
$graphvizCode .= '}';
$this->generateGraphvizOutputFile($graphvizCode, $file, ['targetType' => 'png']);
}