DependencyUtility.php

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<?php
namespace TYPO3\CMS\Extensionmanager\Utility;

use TYPO3\CMS\Core\Utility\ExtensionManagementUtility;
use TYPO3\CMS\Core\Utility\VersionNumberUtility;
use TYPO3\CMS\Extensionmanager\Domain\Model\Dependency;
use TYPO3\CMS\Extensionmanager\Domain\Model\Extension;
use TYPO3\CMS\Extensionmanager\Exception;

class DependencyUtility implements \TYPO3\CMS\Core\SingletonInterface {

    protected $objectManager;

    protected $extensionRepository;

    protected $listUtility;

    protected $emConfUtility;

    protected $managementService;

    protected $availableExtensions = array();

    protected $localExtensionStorage = '';

    protected $dependencyErrors = array();

    protected $skipSystemDependencyCheck = FALSE;

    public function setLocalExtensionStorage($localExtensionStorage) {
        $this->localExtensionStorage = $localExtensionStorage;
    }

    protected function setAvailableExtensions() {
        $this->availableExtensions = $this->listUtility->getAvailableExtensions();
    }

    public function setSkipSystemDependencyCheck($skipSpecialDependencyCheck) {
        $this->skipSystemDependencyCheck = $skipSpecialDependencyCheck;
    }

    public function checkDependencies(Extension $extension) {
        $this->dependencyErrors = array();
        $dependencies = $extension->getDependencies();
        foreach ($dependencies as $dependency) {
            $identifier = strtolower($dependency->getIdentifier());
            try {
                if (in_array($identifier, Dependency::$specialDependencies)) {
                    if (!$this->skipSystemDependencyCheck) {
                        $methodName = 'check' . ucfirst($identifier) . 'Dependency';
                        $this->{$methodName}($dependency);
                    }
                } else {
                    if ($dependency->getType() === 'depends') {
                        $this->checkExtensionDependency($dependency);
                    }
                }
            } catch (Exception\UnresolvedDependencyException $e) {
                if (in_array($identifier, Dependency::$specialDependencies)) {
                    $extensionKey = $extension->getExtensionKey();
                } else {
                    $extensionKey = $identifier;
                }
                if (!isset($this->dependencyErrors[$extensionKey])) {
                    $this->dependencyErrors[$extensionKey] = array();
                }
                $this->dependencyErrors[$extensionKey][] = array(
                    'code' => $e->getCode(),
                    'message' => $e->getMessage()
                );
            }
        }
    }

    public function hasDependencyErrors() {
        return !empty($this->dependencyErrors);
    }

    public function getDependencyErrors() {
        return $this->dependencyErrors;
    }

    protected function checkTypo3Dependency(Dependency $dependency) {
        $lowerCaseIdentifier = strtolower($dependency->getIdentifier());
        if ($lowerCaseIdentifier === 'typo3') {
            if (!($dependency->getLowestVersion() === '') && version_compare(VersionNumberUtility::getNumericTypo3Version(), $dependency->getLowestVersion()) === -1) {
                throw new Exception\UnresolvedTypo3DependencyException(
                    'Your TYPO3 version is lower than this extension requires. It requires TYPO3 versions ' . $dependency->getLowestVersion() . ' - ' . $dependency->getHighestVersion(),
                    1399144499
                );
            }
            if (!($dependency->getHighestVersion() === '') && version_compare($dependency->getHighestVersion(), VersionNumberUtility::getNumericTypo3Version()) === -1) {
                throw new Exception\UnresolvedTypo3DependencyException(
                    'Your TYPO3 version is higher than this extension requires. It requires TYPO3 versions ' . $dependency->getLowestVersion() . ' - ' . $dependency->getHighestVersion(),
                    1399144521
                );
            }
        } else {
            throw new Exception\UnresolvedTypo3DependencyException(
                'checkTypo3Dependency can only check TYPO3 dependencies. Found dependency with identifier "' . $dependency->getIdentifier() . '"',
                1399144551
            );
        }
        return TRUE;
    }

    protected function checkPhpDependency(Dependency $dependency) {
        $lowerCaseIdentifier = strtolower($dependency->getIdentifier());
        if ($lowerCaseIdentifier === 'php') {
            if (!($dependency->getLowestVersion() === '') && version_compare(PHP_VERSION, $dependency->getLowestVersion()) === -1) {
                throw new Exception\UnresolvedPhpDependencyException(
                    'Your PHP version is lower than necessary. You need at least PHP version ' . $dependency->getLowestVersion(),
                     1377977857
                );
            }
            if (!($dependency->getHighestVersion() === '') && version_compare($dependency->getHighestVersion(), PHP_VERSION) === -1) {
                throw new Exception\UnresolvedPhpDependencyException(
                    'Your PHP version is higher than allowed. You can use PHP versions ' . $dependency->getLowestVersion() . ' - ' . $dependency->getHighestVersion(),
                    1377977856
                );
            }
        } else {
            throw new Exception\UnresolvedPhpDependencyException(
                'checkPhpDependency can only check PHP dependencies. Found dependency with identifier "' . $dependency->getIdentifier() . '"',
                1377977858
            );
        }
        return TRUE;
    }

    protected function checkExtensionDependency(Dependency $dependency) {
        $extensionKey = $dependency->getIdentifier();
        $extensionIsLoaded = $this->isDependentExtensionLoaded($extensionKey);
        if ($extensionIsLoaded === TRUE) {
            $isLoadedVersionCompatible = $this->isLoadedVersionCompatible($dependency);
            if ($isLoadedVersionCompatible === TRUE) {
                return TRUE;
            }
            $extension = $this->listUtility->getExtension($extensionKey);
            $loadedVersion = $extension->getPackageMetaData()->getVersion();
            if (version_compare($loadedVersion, $dependency->getHighestVersion()) === -1) {
                try {
                    $this->getExtensionFromRepository($extensionKey, $dependency);
                } catch (Exception\UnresolvedDependencyException $e) {
                    throw new Exception\MissingVersionDependencyException(
                        'The extension ' . $extensionKey . ' is installed in version ' . $loadedVersion
                            . ' but needed in version ' . $dependency->getLowestVersion() . ' - ' . $dependency->getHighestVersion() . ' and could not be fetched from TER',
                        1396302624
                    );
                }
            } else {
                throw new Exception\MissingVersionDependencyException(
                    'The extension ' . $extensionKey . ' is installed in version ' . $loadedVersion .
                    ' but needed in version ' . $dependency->getLowestVersion() . ' - ' . $dependency->getHighestVersion(),
                    1430561927
                );
            }
        } else {
            $extensionIsAvailable = $this->isDependentExtensionAvailable($extensionKey);
            if ($extensionIsAvailable === TRUE) {
                $isAvailableVersionCompatible = $this->isAvailableVersionCompatible($dependency);
                if ($isAvailableVersionCompatible) {
                    $unresolvedDependencyErrors = $this->dependencyErrors;
                    $this->managementService->markExtensionForInstallation($extensionKey);
                    $this->dependencyErrors = array_merge($unresolvedDependencyErrors, $this->dependencyErrors);
                } else {
                    $extension = $this->listUtility->getExtension($extensionKey);
                    $availableVersion = $extension->getPackageMetaData()->getVersion();
                    if (version_compare($availableVersion, $dependency->getHighestVersion()) === -1) {
                        try {
                            $this->getExtensionFromRepository($extensionKey, $dependency);
                        } catch (Exception\MissingExtensionDependencyException $e) {
                            throw new Exception\MissingVersionDependencyException(
                                'The extension ' . $extensionKey . ' is available in version ' . $availableVersion
                                    . ' but is needed in version ' . $dependency->getLowestVersion() . ' - ' . $dependency->getHighestVersion() . ' and could not be fetched from TER',
                                1430560390
                            );
                        }
                    } else {
                        throw new Exception\MissingVersionDependencyException(
                            'The extension ' . $extensionKey . ' is available in version ' . $availableVersion
                                . ' but is needed in version ' . $dependency->getLowestVersion() . ' - ' . $dependency->getHighestVersion(),
                            1430562374
                        );
                    }
                }
            } else {
                $unresolvedDependencyErrors = $this->dependencyErrors;
                $this->getExtensionFromRepository($extensionKey, $dependency);
                $this->dependencyErrors = array_merge($unresolvedDependencyErrors, $this->dependencyErrors);
            }
        }
        return FALSE;
    }

    protected function getExtensionFromRepository($extensionKey, Dependency $dependency) {
        if (!$this->getExtensionFromInExtensionRepository($extensionKey, $dependency)) {
            $this->getExtensionFromTer($extensionKey, $dependency);
        }
    }

    protected function getExtensionFromInExtensionRepository($extensionKey) {
        if ($this->localExtensionStorage !== '' && is_dir($this->localExtensionStorage)) {
            $extList = \TYPO3\CMS\Core\Utility\GeneralUtility::get_dirs($this->localExtensionStorage);
            if (in_array($extensionKey, $extList)) {
                $this->managementService->markExtensionForCopy($extensionKey, $this->localExtensionStorage);
                return TRUE;
            }
        }
        return FALSE;
    }

    protected function getExtensionFromTer($extensionKey, Dependency $dependency) {
        $isExtensionDownloadableFromTer = $this->isExtensionDownloadableFromTer($extensionKey);
        if (!$isExtensionDownloadableFromTer) {
            if (!$this->skipSystemDependencyCheck) {
                if ($this->extensionRepository->countAll() > 0) {
                    throw new Exception\MissingExtensionDependencyException(
                        'The extension ' . $extensionKey . ' is not available from TER.',
                        1399161266
                    );
                } else {
                    throw new Exception\MissingExtensionDependencyException(
                        'The extension ' . $extensionKey . ' could not be checked. Please update your Extension-List from TYPO3 Extension Repository (TER).',
                        1430580308
                    );
                }
            }
            return;
        }

        $isDownloadableVersionCompatible = $this->isDownloadableVersionCompatible($dependency);
        if (!$isDownloadableVersionCompatible) {
            if (!$this->skipSystemDependencyCheck) {
                throw new Exception\MissingVersionDependencyException(
                    'No compatible version found for extension ' . $extensionKey,
                    1399161284
                );
            }
            return;
        }

        $latestCompatibleExtensionByIntegerVersionDependency = $this->getLatestCompatibleExtensionByIntegerVersionDependency($dependency);
        if (!$latestCompatibleExtensionByIntegerVersionDependency instanceof Extension) {
            if (!$this->skipSystemDependencyCheck) {
                throw new Exception\MissingExtensionDependencyException(
                    'Could not resolve dependency for "' . $dependency->getIdentifier() . '"',
                    1399161302
                );
            }
            return;
        }

        if ($this->isDependentExtensionLoaded($extensionKey)) {
            $this->managementService->markExtensionForUpdate($latestCompatibleExtensionByIntegerVersionDependency);
        } else {
            $this->managementService->markExtensionForDownload($latestCompatibleExtensionByIntegerVersionDependency);
        }
    }

    protected function isDependentExtensionLoaded($extensionKey) {
        return ExtensionManagementUtility::isLoaded($extensionKey);
    }

    protected function isLoadedVersionCompatible(Dependency $dependency) {
        $extensionVersion = ExtensionManagementUtility::getExtensionVersion($dependency->getIdentifier());
        return $this->isVersionCompatible($extensionVersion, $dependency);
    }

    protected function isVersionCompatible($version, Dependency $dependency) {
        if (!($dependency->getLowestVersion() === '') && version_compare($version, $dependency->getLowestVersion()) === -1) {
            return FALSE;
        }
        if (!($dependency->getHighestVersion() === '') && version_compare($dependency->getHighestVersion(), $version) === -1) {
            return FALSE;
        }
        return TRUE;
    }

    protected function isDependentExtensionAvailable($extensionKey) {
        $this->setAvailableExtensions();
        return array_key_exists($extensionKey, $this->availableExtensions);
    }

    protected function isAvailableVersionCompatible(Dependency $dependency) {
        $this->setAvailableExtensions();
        $extensionData = $this->emConfUtility->includeEmConf($this->availableExtensions[$dependency->getIdentifier()]);
        return $this->isVersionCompatible($extensionData['version'], $dependency);
    }

    protected function isExtensionDownloadableFromTer($extensionKey) {
        return $this->extensionRepository->countByExtensionKey($extensionKey) > 0;
    }

    protected function isDownloadableVersionCompatible(Dependency $dependency) {
        $versions = $this->getLowestAndHighestIntegerVersions($dependency);
        $count = $this->extensionRepository->countByVersionRangeAndExtensionKey(
            $dependency->getIdentifier(), $versions['lowestIntegerVersion'], $versions['highestIntegerVersion']
        );
        return !empty($count);
    }

    protected function getLatestCompatibleExtensionByIntegerVersionDependency(Dependency $dependency) {
        $versions = $this->getLowestAndHighestIntegerVersions($dependency);
        $compatibleDataSets = $this->extensionRepository->findByVersionRangeAndExtensionKeyOrderedByVersion(
            $dependency->getIdentifier(),
            $versions['lowestIntegerVersion'],
            $versions['highestIntegerVersion']
        );
        return $compatibleDataSets->getFirst();
    }

    protected function getLowestAndHighestIntegerVersions(Dependency $dependency) {
        $lowestVersion = $dependency->getLowestVersion();
        $lowestVersionInteger = $lowestVersion ? VersionNumberUtility::convertVersionNumberToInteger($lowestVersion) : 0;
        $highestVersion = $dependency->getHighestVersion();
        $highestVersionInteger = $highestVersion ? VersionNumberUtility::convertVersionNumberToInteger($highestVersion) : 0;
        return array(
            'lowestIntegerVersion' => $lowestVersionInteger,
            'highestIntegerVersion' => $highestVersionInteger
        );
    }

    public function findInstalledExtensionsThatDependOnMe($extensionKey) {
        $availableAndInstalledExtensions = $this->listUtility->getAvailableAndInstalledExtensionsWithAdditionalInformation();
        $dependentExtensions = array();
        foreach ($availableAndInstalledExtensions as $availableAndInstalledExtensionKey => $availableAndInstalledExtension) {
            if (isset($availableAndInstalledExtension['installed']) && $availableAndInstalledExtension['installed'] === TRUE) {
                if (is_array($availableAndInstalledExtension['constraints']) && is_array($availableAndInstalledExtension['constraints']['depends']) && array_key_exists($extensionKey, $availableAndInstalledExtension['constraints']['depends'])) {
                    $dependentExtensions[] = $availableAndInstalledExtensionKey;
                }
            }
        }
        return $dependentExtensions;
    }

}