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Filename : Bound.php
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<?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\Constraint;

class Bound
{
    /**
     * @var string
     */
    private $version;

    /**
     * @var bool
     */
    private $isInclusive;

    /**
     * @param string $version
     * @param bool   $isInclusive
     */
    public function __construct($version, $isInclusive)
    {
        $this->version = $version;
        $this->isInclusive = $isInclusive;
    }

    /**
     * @return string
     */
    public function getVersion()
    {
        return $this->version;
    }

    /**
     * @return bool
     */
    public function isInclusive()
    {
        return $this->isInclusive;
    }

    /**
     * @return bool
     */
    public function isZero()
    {
        return $this->getVersion() === '0.0.0.0-dev' && $this->isInclusive();
    }

    /**
     * @return bool
     */
    public function isPositiveInfinity()
    {
        return $this->getVersion() === PHP_INT_MAX.'.0.0.0' && !$this->isInclusive();
    }

    /**
     * Compares a bound to another with a given operator.
     *
     * @param Bound  $other
     * @param string $operator
     *
     * @return bool
     */
    public function compareTo(Bound $other, $operator)
    {
        if (!\in_array($operator, array('<', '>'), true)) {
            throw new \InvalidArgumentException('Does not support any other operator other than > or <.');
        }

        // If they are the same it doesn't matter
        if ($this == $other) {
            return false;
        }

        $compareResult = version_compare($this->getVersion(), $other->getVersion());

        // Not the same version means we don't need to check if the bounds are inclusive or not
        if (0 !== $compareResult) {
            return (('>' === $operator) ? 1 : -1) === $compareResult;
        }

        // Question we're answering here is "am I higher than $other?"
        return '>' === $operator ? $other->isInclusive() : !$other->isInclusive();
    }

    public function __toString()
    {
        return sprintf(
            '%s [%s]',
            $this->getVersion(),
            $this->isInclusive() ? 'inclusive' : 'exclusive'
        );
    }

    /**
     * @return self
     */
    public static function zero()
    {
        return new Bound('0.0.0.0-dev', true);
    }

    /**
     * @return self
     */
    public static function positiveInfinity()
    {
        return new Bound(PHP_INT_MAX.'.0.0.0', false);
    }
}