<?php

/*
 * This file is part of Psy Shell.
 *
 * (c) 2012-2023 Justin Hileman
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Psy\CodeCleaner;

use PhpParser\Node;
use PhpParser\Node\Expr;
use PhpParser\Node\Expr\Exit_;
use PhpParser\Node\Stmt;
use PhpParser\Node\Stmt\Break_;
use PhpParser\Node\Stmt\Expression;
use PhpParser\Node\Stmt\If_;
use PhpParser\Node\Stmt\Namespace_;
use PhpParser\Node\Stmt\Return_;
use PhpParser\Node\Stmt\Switch_;

/**
 * Add an implicit "return" to the last statement, provided it can be returned.
 */
class ImplicitReturnPass extends CodeCleanerPass
{
    /**
     * @param array $nodes
     *
     * @return array
     */
    public function beforeTraverse(array $nodes): array
    {
        return $this->addImplicitReturn($nodes);
    }

    /**
     * @param array $nodes
     *
     * @return array
     */
    private function addImplicitReturn(array $nodes): array
    {
        // If nodes is empty, it can't have a return value.
        if (empty($nodes)) {
            return [new Return_(NoReturnValue::create())];
        }

        $last = \end($nodes);

        // Special case a few types of statements to add an implicit return
        // value (even though they technically don't have any return value)
        // because showing a return value in these instances is useful and not
        // very surprising.
        if ($last instanceof If_) {
            $last->stmts = $this->addImplicitReturn($last->stmts);

            foreach ($last->elseifs as $elseif) {
                $elseif->stmts = $this->addImplicitReturn($elseif->stmts);
            }

            if ($last->else) {
                $last->else->stmts = $this->addImplicitReturn($last->else->stmts);
            }
        } elseif ($last instanceof Switch_) {
            foreach ($last->cases as $case) {
                // only add an implicit return to cases which end in break
                $caseLast = \end($case->stmts);
                if ($caseLast instanceof Break_) {
                    $case->stmts = $this->addImplicitReturn(\array_slice($case->stmts, 0, -1));
                    $case->stmts[] = $caseLast;
                }
            }
        } elseif ($last instanceof Expr && !($last instanceof Exit_)) {
            // @codeCoverageIgnoreStart
            $nodes[\count($nodes) - 1] = new Return_($last, [
                'startLine' => $last->getStartLine(),
                'endLine'   => $last->getEndLine(),
            ]);
        // @codeCoverageIgnoreEnd
        } elseif ($last instanceof Expression && !($last->expr instanceof Exit_)) {
            $nodes[\count($nodes) - 1] = new Return_($last->expr, [
                'startLine' => $last->getStartLine(),
                'endLine'   => $last->getEndLine(),
            ]);
        } elseif ($last instanceof Namespace_) {
            $last->stmts = $this->addImplicitReturn($last->stmts);
        }

        // Return a "no return value" for all non-expression statements, so that
        // PsySH can suppress the `null` that `eval()` returns otherwise.
        //
        // Note that statements special cased above (if/elseif/else, switch)
        // _might_ implicitly return a value before this catch-all return is
        // reached.
        //
        // We're not adding a fallback return after namespace statements,
        // because code outside namespace statements doesn't really work, and
        // there's already an implicit return in the namespace statement anyway.
        if (self::isNonExpressionStmt($last)) {
            $nodes[] = new Return_(NoReturnValue::create());
        }

        return $nodes;
    }

    /**
     * Check whether a given node is a non-expression statement.
     *
     * As of PHP Parser 4.x, Expressions are now instances of Stmt as well, so
     * we'll exclude them here.
     *
     * @param Node $node
     */
    private static function isNonExpressionStmt(Node $node): bool
    {
        return $node instanceof Stmt &&
            !$node instanceof Expression &&
            !$node instanceof Return_ &&
            !$node instanceof Namespace_;
    }
}

• [F] AbstractClassPass.php
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• [F] AssignThisVariablePass.php
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• [F] CalledClassPass.php
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• [F] CallTimePassByReferencePass.php
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• [F] CodeCleanerPass.php
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• [F] EmptyArrayDimFetchPass.php
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• [F] ExitPass.php
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• [F] FinalClassPass.php
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• [F] FunctionContextPass.php
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• [F] FunctionReturnInWriteContextPass.php
  Delete
• [F] ImplicitReturnPass.php
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• [F] IssetPass.php
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• [F] LabelContextPass.php
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• [F] LeavePsyshAlonePass.php
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• [F] ListPass.php
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• [F] LoopContextPass.php
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• [F] MagicConstantsPass.php
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• [F] NamespaceAwarePass.php
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• [F] NamespacePass.php
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• [F] NoReturnValue.php
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• [F] PassableByReferencePass.php
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• [F] RequirePass.php
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• [F] ReturnTypePass.php
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• [F] StrictTypesPass.php
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• [F] UseStatementPass.php
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• [F] ValidClassNamePass.php
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• [F] ValidConstructorPass.php
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• [F] ValidFunctionNamePass.php
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About Section

About NFC Pay: Our Story and Mission

NFC Pay was founded with a vision to transform the way people handle transactions. Our journey is defined by a commitment to innovation, security, and convenience. We strive to deliver seamless, user-friendly payment solutions that make everyday transactions effortless and secure. Our mission is to empower you to pay with ease and confidence, anytime, anywhere.

• Simplifying Payments, One Tap at a Time.
• Reinventing Your Wallet for Modern Convenience.
• Smart Payments for a Effortless Lifestyle.
• Experience the Ease of Tap and Pay.
• Innovative Solutions for Your Daily Transactions.

FAQ Section

Frequently Asked Questions About NFC Pay

Here are answers to some common questions about NFC Pay. We aim to provide clear and concise information to help you understand how our platform works and how it can benefit you. If you have any further inquiries, please don’t hesitate to contact our support team.

How do I register for NFC Pay?

Download the app and sign up using your email or phone number, then complete the verification process.

Is my payment information secure?

Yes, we use advanced encryption and security protocols to protect your payment details.

Can I add multiple cards to my NFC Pay wallet?

Absolutely, you can link multiple debit or credit cards to your wallet.

How do I transfer money to another user?

Go to the transfer section, select the recipient, enter the amount, and authorize the transfer.

What should I do if I forget my PIN?

Use the “Forgot PIN” feature in the app to reset it following the provided instructions.

How can I activate my merchant account?

Sign up for a merchant account through the app and follow the setup instructions to start accepting payments.

Can I track my payment status?

Yes, you can view and track your payment status in the account dashboard