--- /dev/null
+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Psy\Sudo;
+
+use PhpParser\Node;
+use PhpParser\Node\Arg;
+use PhpParser\Node\Expr\Assign;
+use PhpParser\Node\Expr\ClassConstFetch;
+use PhpParser\Node\Expr\MethodCall;
+use PhpParser\Node\Expr\PropertyFetch;
+use PhpParser\Node\Expr\StaticCall;
+use PhpParser\Node\Expr\StaticPropertyFetch;
+use PhpParser\Node\Name\FullyQualified as FullyQualifiedName;
+use PhpParser\Node\Scalar\String_;
+use PhpParser\NodeVisitorAbstract;
+
+/**
+ * A PHP Parser node visitor which rewrites property and method access to use
+ * the Psy\Sudo visibility bypass methods.
+ *
+ * @todo handle assigning by reference
+ */
+class SudoVisitor extends NodeVisitorAbstract
+{
+ const SUDO_CLASS = 'Psy\Sudo';
+
+ const PROPERTY_FETCH = 'fetchProperty';
+ const PROPERTY_ASSIGN = 'assignProperty';
+ const METHOD_CALL = 'callMethod';
+ const STATIC_PROPERTY_FETCH = 'fetchStaticProperty';
+ const STATIC_PROPERTY_ASSIGN = 'assignStaticProperty';
+ const STATIC_CALL = 'callStatic';
+ const CLASS_CONST_FETCH = 'fetchClassConst';
+
+ /**
+ * {@inheritdoc}
+ */
+ public function enterNode(Node $node)
+ {
+ if ($node instanceof PropertyFetch) {
+ $args = array(
+ $node->var,
+ is_string($node->name) ? new String_($node->name) : $node->name,
+ );
+
+ return $this->prepareCall(self::PROPERTY_FETCH, $args);
+ } elseif ($node instanceof Assign && $node->var instanceof PropertyFetch) {
+ $target = $node->var;
+ $args = array(
+ $target->var,
+ is_string($target->name) ? new String_($target->name) : $target->name,
+ $node->expr,
+ );
+
+ return $this->prepareCall(self::PROPERTY_ASSIGN, $args);
+ } elseif ($node instanceof MethodCall) {
+ $args = $node->args;
+ array_unshift($args, new Arg(is_string($node->name) ? new String_($node->name) : $node->name));
+ array_unshift($args, new Arg($node->var));
+
+ // not using prepareCall because the $node->args we started with are already Arg instances
+ return new StaticCall(new FullyQualifiedName(self::SUDO_CLASS), self::METHOD_CALL, $args);
+ } elseif ($node instanceof StaticPropertyFetch) {
+ $class = $node->class instanceof Name ? (string) $node->class : $node->class;
+ $args = array(
+ is_string($class) ? new String_($class) : $class,
+ is_string($node->name) ? new String_($node->name) : $node->name,
+ );
+
+ return $this->prepareCall(self::STATIC_PROPERTY_FETCH, $args);
+ } elseif ($node instanceof Assign && $node->var instanceof StaticPropertyFetch) {
+ $target = $node->var;
+ $class = $target->class instanceof Name ? (string) $target->class : $target->class;
+ $args = array(
+ is_string($class) ? new String_($class) : $class,
+ is_string($target->name) ? new String_($target->name) : $target->name,
+ $node->expr,
+ );
+
+ return $this->prepareCall(self::STATIC_PROPERTY_ASSIGN, $args);
+ } elseif ($node instanceof StaticCall) {
+ $args = $node->args;
+ $class = $node->class instanceof Name ? (string) $node->class : $node->class;
+ array_unshift($args, new Arg(is_string($node->name) ? new String_($node->name) : $node->name));
+ array_unshift($args, new Arg(is_string($class) ? new String_($class) : $class));
+
+ // not using prepareCall because the $node->args we started with are already Arg instances
+ return new StaticCall(new FullyQualifiedName(self::SUDO_CLASS), self::STATIC_CALL, $args);
+ } elseif ($node instanceof ClassConstFetch) {
+ $class = $node->class instanceof Name ? (string) $node->class : $node->class;
+ $args = array(
+ is_string($class) ? new String_($class) : $class,
+ is_string($node->name) ? new String_($node->name) : $node->name,
+ );
+
+ return $this->prepareCall(self::CLASS_CONST_FETCH, $args);
+ }
+ }
+
+ private function prepareCall($method, $args)
+ {
+ return new StaticCall(new FullyQualifiedName(self::SUDO_CLASS), $method, array_map(function ($arg) {
+ return new Arg($arg);
+ }, $args));
+ }
+}