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<?php

/**
 * @file tools/CopyAcessLogFileTool.php
 *
 * Copyright (c) 2013-2021 Simon Fraser University
 * Copyright (c) 2003-2021 John Willinsky
 * Distributed under the GNU GPL v3. For full terms see the file docs/COPYING.
 *
 * @class CopyAccessLogFileTool
 * @ingroup tools
 *
 * @brief CLI tool to copy apache log files while filtering entries
 * related only to the current instalation.
 */

require(dirname(dirname(dirname(dirname(__FILE__)))) . '/tools/bootstrap.inc.php');

// Bring in the file loader folder constants.
import('lib.pkp.classes.task.FileLoader');

class CopyAccessLogFileTool extends CommandLineTool {

var $_usageStatsDir;

var $_tmpDir;

var $_usageStatsFiles;

var $_contextPaths;

var $_egrepPath;

/**
	 * Constructor.
	 * @param $argv array command-line arguments
	 */
	function __construct($argv = array()) {
		parent::__construct($argv);

AppLocale::requireComponents(LOCALE_COMPONENT_PKP_ADMIN);

if (count($this->argv) < 1 || count($this->argv) > 2) {
			$this->usage();
			exit(1);
		}

$plugin = PluginRegistry::getPlugin('generic', 'usagestatsplugin'); /* @var $plugin UsageStatsPlugin */

$this->_usageStatsDir = $plugin->getFilesPath();
		$this->_tmpDir = $this->_usageStatsDir . DIRECTORY_SEPARATOR . 'tmp';

// This tool needs egrep path configured.
		$this->_egrepPath = escapeshellarg(Config::getVar('cli', 'egrep'));
		if ($this->_egrepPath == "''") {
			printf(__('admin.error.executingUtil', array('utilPath' => $this->_egrepPath, 'utilVar' => 'egrep')) . "\n");
			exit(1);
		}

// Get a list of files currently inside the usage stats dir.
		$fileLoaderDirs = array(FILE_LOADER_PATH_STAGING, FILE_LOADER_PATH_PROCESSING,
		FILE_LOADER_PATH_ARCHIVE, FILE_LOADER_PATH_REJECT);

$usageStatsFiles = array();
		foreach ($fileLoaderDirs as $dir) {
			$dirFiles =  glob($this->_usageStatsDir . DIRECTORY_SEPARATOR . $dir . DIRECTORY_SEPARATOR . '*');
			if (is_array($dirFiles) && count($dirFiles) > 0) {
				foreach ($dirFiles as $file) {
					if (!is_file($file)) continue;
					$fileBasename = pathinfo($file, PATHINFO_BASENAME);
					if (pathinfo($file, PATHINFO_EXTENSION) == 'gz') {
						// Always save the filename without compression extension.
						$fileBasename = substr($fileBasename, 0, -3);
					}
					$usageStatsFiles[] = $fileBasename;
				}
			}
		}

$this->_usageStatsFiles = $usageStatsFiles;

// Get a list of context paths.
		$contextDao =& Application::getContextDAO(); /* @var $contextDao ContextDAO */
		$contextFactory = $contextDao->getAll();
		$contextPaths = array();
		while ($context =& $contextFactory->next()) {
			/* @var $context Context */
			$contextPaths[] = escapeshellarg($context->getPath());
		}
		$contextPaths = implode('/|/', $contextPaths);
		$this->_contextPaths = $contextPaths;
	}

/**
	 * Print command usage information.
	 */
	function usage() {
		echo "\n" . __('admin.copyAccessLogFileTool.usage', array('scriptName' => $this->scriptName)) . "\n\n";
	}

/**
	 * Process apache log files, copying and filtering them
	 * to the usage stats stage directory. Can work with both
	 * a specific file or a directory.
	 */
	function execute() {
		$fileMgr = new FileManager();
		$filesDir = Config::getVar('files', 'files_dir');
		$filePath = current($this->argv);
		$usageStatsDir = $this->_usageStatsDir;
		$tmpDir = $this->_tmpDir;

if ($fileMgr->fileExists($tmpDir, 'dir')) {
			$fileMgr->rmtree($tmpDir);
		}

if (!$fileMgr->mkdir($tmpDir)) {
			printf(__('admin.copyAccessLogFileTool.error.creatingFolder', array('tmpDir' => $tmpDir)) . "\n");
			exit(1);
		}

if ($fileMgr->fileExists($filePath, 'dir')) {
			// Directory.
			$filesToCopy = glob($filePath . DIRECTORY_SEPARATOR . '*');
			foreach ($filesToCopy as $file) {
				// If a base filename is given as a parameter, check it.
				if (count($this->argv) == 2) {
					$baseFilename = $this->argv[1];
					if (strpos(pathinfo($file, PATHINFO_BASENAME), $baseFilename) !== 0) {
						continue;
					}
				}

$this->_copyFile($file);
			}
		} else {
			if ($fileMgr->fileExists($filePath)) {
				// File.
				$this->_copyFile($filePath);
			} else {
				// Can't access.
				printf(__('admin.copyAccessLogFileTool.error.acessingFile', array('filePath' => $filePath)) . "\n");
			}
		}

$fileMgr->rmtree($tmpDir);
	}

//
	// Private helper methods.
	//
	/**
	 * Copy the passed file, filtering entries
	 * related to this installation.
	 * @param $filePath string
	 */
	function _copyFile($filePath) {
		$usageStatsFiles = $this->_usageStatsFiles;
		$usageStatsDir = $this->_usageStatsDir;
		$tmpDir = $this->_tmpDir;
		$fileName = pathinfo($filePath, PATHINFO_BASENAME);
		$fileMgr = new FileManager();

$isCompressed = false;
		$uncompressedFileName = $fileName;
		if (pathinfo($filePath, PATHINFO_EXTENSION) == 'gz') {
			$isCompressed = true;
			$uncompressedFileName = substr($fileName, 0, -3);
		}

if (in_array($uncompressedFileName, $usageStatsFiles)) {
			printf(__('admin.copyAccessLogFileTool.warning.fileAlreadyExists', array('filePath' => $filePath)) . "\n");
			return;
		}

$tmpFilePath = $tmpDir . DIRECTORY_SEPARATOR . $fileName;

// Copy the file to a temporary directory.
		if (!$fileMgr->copyFile($filePath, $tmpFilePath)) {
			printf(__('admin.copyAccessLogFileTool.error.copyingFile', array('filePath' => $filePath, 'tmpFilePath' => $tmpFilePath)) . "\n");
			exit(1);
		}

// Uncompress it, if needed.
		if ($isCompressed) {
			$fileMgr = new FileManager();
			try {
				$tmpFilePath = $fileMgr->decompressFile($tmpFilePath);
			} catch (Exception $e) {
				printf($e->getMessage() . "\n");
				exit(1);
			}
		}

// Filter only entries that contains context paths.
		$egrepPath = $this->_egrepPath;
		$destinationPath = $usageStatsDir . DIRECTORY_SEPARATOR .
		FILE_LOADER_PATH_STAGING . DIRECTORY_SEPARATOR .
		pathinfo($tmpFilePath, PATHINFO_BASENAME);
		// Each context path is already escaped, see the constructor.
		$output = null;
		$returnValue = 0;
		exec($egrepPath . " -i '" . $this->_contextPaths . "' " . escapeshellarg($tmpFilePath) . " > " . escapeshellarg($destinationPath), $output, $returnValue);
		if ($returnValue > 1) {
			printf(__('admin.error.executingUtil', array('utilPath' => $egrepPath, 'utilVar' => 'egrep')) . "\n");
 			exit(1);
 		}
		if (!$fileMgr->deleteByPath($tmpFilePath)) {
			printf(__('admin.copyAccessLogFileTool.error.deletingFile', array('tmpFilePath' => $tmpFilePath)) . "\n");
			exit(1);
		}

printf(__('admin.copyAccessLogFileTool.success', array('filePath' => $filePath, 'destinationPath' => $destinationPath)) . "\n");
	}
}

$tool = new CopyAccessLogFileTool(isset($argv) ? $argv : array());
$tool->execute();