<?php

/*
 * This file is part of composer/semver.
 *
 * (c) Composer <https://github.com/composer>
 *
 * For the full copyright and license information, please view
 * the LICENSE file that was distributed with this source code.
 */

namespace Composer\Semver;

use Composer\Semver\Constraint\Constraint;
use Composer\Semver\Constraint\ConstraintInterface;

/**
 * Helper class to evaluate constraint by compiling and reusing the code to evaluate
 */
class CompilingMatcher
{
    /**
     * @var array
     * @phpstan-var array<string, callable>
     */
    private static $compiledCheckerCache = array();
    /**
     * @var array
     * @phpstan-var array<string, bool>
     */
    private static $resultCache = array();

    /** @var bool */
    private static $enabled;

    /**
     * @phpstan-var array<Constraint::OP_*, Constraint::STR_OP_*>
     */
    private static $transOpInt = array(
        Constraint::OP_EQ => Constraint::STR_OP_EQ,
        Constraint::OP_LT => Constraint::STR_OP_LT,
        Constraint::OP_LE => Constraint::STR_OP_LE,
        Constraint::OP_GT => Constraint::STR_OP_GT,
        Constraint::OP_GE => Constraint::STR_OP_GE,
        Constraint::OP_NE => Constraint::STR_OP_NE,
    );

    /**
     * Clears the memoization cache once you are done
     *
     * @return void
     */
    public static function clear()
    {
        self::$resultCache = array();
        self::$compiledCheckerCache = array();
    }

    /**
     * Evaluates the expression: $constraint match $operator $version
     *
     * @param ConstraintInterface $constraint
     * @param int                 $operator
     * @phpstan-param Constraint::OP_*  $operator
     * @param string              $version
     *
     * @return mixed
     */
    public static function match(ConstraintInterface $constraint, $operator, $version)
    {
        $resultCacheKey = $operator.$constraint.';'.$version;

        if (isset(self::$resultCache[$resultCacheKey])) {
            return self::$resultCache[$resultCacheKey];
        }

        if (self::$enabled === null) {
            self::$enabled = !\in_array('eval', explode(',', (string) ini_get('disable_functions')), true);
        }
        if (!self::$enabled) {
            return self::$resultCache[$resultCacheKey] = $constraint->matches(new Constraint(self::$transOpInt[$operator], $version));
        }

        $cacheKey = $operator.$constraint;
        if (!isset(self::$compiledCheckerCache[$cacheKey])) {
            $code = $constraint->compile($operator);
            self::$compiledCheckerCache[$cacheKey] = $function = eval('return function($v, $b){return '.$code.';};');
        } else {
            $function = self::$compiledCheckerCache[$cacheKey];
        }

        return self::$resultCache[$resultCacheKey] = $function($version, strpos($version, 'dev-') === 0);
    }
}

• [D] Constraint
• [F] Comparator.php
  Delete
• [F] CompilingMatcher.php
  Delete
• [F] Interval.php
  Delete
• [F] Intervals.php
  Delete
• [F] Semver.php
  Delete
• [F] VersionParser.php
  Delete

Blog Section

Discover the Latest in Digital Payments and NFC Technology

Dive into our blog to explore the cutting-edge trends in digital payments and NFC technology. Stay updated on the innovations that are revolutionizing transactions, boosting security, and making payments quicker and more convenient. Learn how these advancements are shaping the future of financial interactions and driving the global transition towards a cashless world.

The Rise of Contactless Payments:...

In recent years, contactless payments have surged in popularity, driven...

Visit Blog

March 27, 2024

Enhancing Payment Security: The Role...

As digital transactions proliferate, ensuring robust payment security is more critical than ever. Two foundational...

Visit Blog

March 27, 2024

The Future of Digital Wallets:...

Digital wallets have fundamentally transformed how we manage money, offering a streamlined, secure, and highly...

Visit Blog

March 27, 2024