ArcanistParentMemberReferenceXHPASTLinterRule.php
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	joshuaspence
	Nov 9 2015, 12:36 AM

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ArcanistParentMemberReferenceXHPASTLinterRule.php
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	<?php

	final class ArcanistParentMemberReferenceXHPASTLinterRule
	extends ArcanistXHPASTLinterRule {

	const ID = 100;

	public function getLintName() {
	return pht('Parent Member Reference');
	}

	public function getLintSeverity() {
	return ArcanistLintSeverity::SEVERITY_ADVICE;
	}

	public function process(XHPASTNode $root) {
	$class_declarations = $root->selectDescendantsOfType('n_CLASS_DECLARATION');

	foreach ($class_declarations as $class_declaration) {
	$parent_class = $class_declaration
	->getChildOfType(2, 'n_EXTENDS_LIST')
	->getChildOfType(0, 'n_CLASS_NAME')
	->getConcreteString();

	$class_static_accesses = $class_declaration
	->selectDescendantsOfType('n_CLASS_STATIC_ACCESS');
	$closures = $this->getAnonymousClosures($class_declaration);

	foreach ($class_static_accesses as $class_static_access) {
	$double_colons = $class_static_access
	->selectTokensOfType('T_PAAMAYIM_NEKUDOTAYIM');
	$class_ref = $class_static_access->getChildByIndex(0);

	if ($class_ref->getTypeName() != 'n_CLASS_NAME') {
	continue;
	}
	$class_ref_name = $class_ref->getConcreteString();

	if (strtolower($parent_class) == strtolower($class_ref_name)) {
	$in_closure = false;

	foreach ($closures as $closure) {
	if ($class_ref->isDescendantOf($closure)) {
	$in_closure = true;
	break;
	}
	}

	if (version_compare($this->version, '5.4.0', '>=') \|\| !$in_closure) {
	$this->raiseLintAtNode(
	$class_ref,
	pht(
	'Use `%s` to call.',
	'parent::'),
	'parent');
	}
	}
	}
	}
	}

	}