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<?php
    require_once(dirname(__FILE__) . "/../file_sources/PathOperations.php");
    require_once(dirname(__FILE__) . "/LicenseReader.php");
    require_once(dirname(__FILE__) . "/KeyPairSuite.php");
    require_once(dirname(__FILE__) . "/ProPackageIDGenerator.php");
    require_once(dirname(__FILE__) . "/ProConfigBuilder.php");
    require_once(dirname(__FILE__) . "/../lib/LocalizableException.php");

class LicenseWriter {
        /**
         * @var string
         */
        private $licenseContent;

/**
         * @var string
         */
        private $outputDirectory;

/**
         * @var KeyPairSuite
         */
        private $keyPairSuite;

/**
         * LicenseWriter constructor.
         * @param $licenseContent string
         * @param $publicKeyPath string
         * @param $outputDirectory string
         */
        public function __construct($licenseContent, $publicKeyPath, $outputDirectory) {
            $this->licenseContent = trim($licenseContent);
            $this->outputDirectory = $outputDirectory;
            $this->keyPairSuite = new KeyPairSuite($publicKeyPath);
        }

public function throwInvalidLicenseException($previousException = null) {
            throw new InvalidLicenseException("The license entered was not valid.",
                LocalizableExceptionDefinition::$INVALID_POSTED_LICENSE_ERROR, null, $previousException);
        }

public function getLicenseData() {
            $licenseReader = new LicenseReader($this->keyPairSuite);
            try {
                return $licenseReader->readLicenseString("POST", $this->getLicenseContent());
            } catch (LicensingException $e) {
                $this->throwInvalidLicenseException($e);
            }
        }

public function getProPackageID($email) {
            $proIDGenerator = new ProPackageIDGenerator(strtolower($email));
            // Without anything else to work with, we're basically building the ID by sha($email + $email)
            // Not super secure any more but should still be good enough for our purposes

return $proIDGenerator->idFromEmail($email);
        }

public function getExistingLicense() {
            if (MONSTA_LICENSE_PATH !== "") {
                $licenseReader = new LicenseReader($this->keyPairSuite);
                try {
                    return $licenseReader->readLicense(MONSTA_LICENSE_PATH);
                } catch (Exception $e) {
                }
            }
            return null;
        }

private function validateNewLicenseAgainstExisting() {
            $newLicense = $this->getLicenseData();
            $existingLicense = $this->getExistingLicense();
            if ($existingLicense === null)
                return;

if ($newLicense["expiryDate"] < $existingLicense["expiryDate"])
                throw new LicensingException("The new license was not saved as its expiry date is earlier than the 
                current license.", LocalizableExceptionDefinition::$REPLACEMENT_LICENSE_OLDER_ERROR);
        }

/**
         * @return string
         */
        public function getOutputDirectory() {
            return normalizePath($this->outputDirectory);
        }

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

public function getConfigOutputPath() {
            return PathOperations::join($this->getOutputDirectory(), "config_pro.php");
        }

public function writeLicense($proPackageID, $licenseContent) {
            $this->checkOutputDirectoryWritable();

$configBuilder = new ProConfigBuilder($proPackageID);

$licensePath = PathOperations::join($this->getOutputDirectory(),
                $configBuilder->generateRelativeLicensePath());

if (@file_put_contents($licensePath, $licenseContent) === false) {
                $errorPath = basename(dirname($licensePath)) . "/" . basename($licensePath);
                throw new LocalizableException("Could not write license file to $errorPath",
                    LocalizableExceptionDefinition::$LICENSE_WRITE_ERROR, array("path" => $errorPath));
            }
        }

public function writeConfig($configContent) {
            $this->checkOutputDirectoryWritable();

if (@file_put_contents($this->getConfigOutputPath(), $configContent) === false) {
                $path = normalizePath($this->getConfigOutputPath());
                $errorPath = basename(dirname($path)) . "/" . basename($path);
                throw new LocalizableException("Could not write pro config to " . $errorPath,
                    LocalizableExceptionDefinition::$LICENSE_WRITE_ERROR,
                    array("path" => $errorPath));
            }
        }

public function renderConfig($configTemplatePath, $proPackageID) {
            $configBuilder = new ProConfigBuilder($proPackageID);
            return $configBuilder->renderProConfig($configTemplatePath);
        }

public function writeProFiles($configTemplatePath) {
            $this->validateNewLicenseAgainstExisting();
            $newLicense = $this->getLicenseData();
            $proPackageId = $this->getProPackageID($newLicense['email']);
            $this->writeLicense($proPackageId, $this->getLicenseContent());
            $configContent = $this->renderConfig($configTemplatePath, $proPackageId);
            $this->writeConfig($configContent);
        }

private function checkOutputDirectoryWritable() {
            if (!@is_writable($this->getOutputDirectory())) {
                $path = normalizePath($this->getOutputDirectory());
                $errorPath = basename(dirname($path)) . "/" . basename($path);
                throw new LocalizableException("License directory " . $errorPath . " not writable, check its permissions.",
                    LocalizableExceptionDefinition::$LICENSE_DIRECTORY_NOT_WRITABLE_ERROR,
                    array("path" => $errorPath));
            }
        }
    }