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Copyright (C) Villanova University 2010.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 2,
as published by the Free Software Foundation.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA";s:51:" phpDocumentor\Reflection\DocBlock\Description tags";a:0:{}}s:67:" phpDocumentor\Descriptor\DocBlock\DescriptionDescriptor inlineTags";a:0:{}}s:17:" * fileDescriptor";N;s:7:" * line";i:0;s:7:" * tags";O:35:"phpDocumentor\Descriptor\Collection":1:{s:8:" * items";a:5:{s:8:"category";O:35:"phpDocumentor\Descriptor\Collection":1:{s:8:" * items";a:1:{i:0;O:38:"phpDocumentor\Descriptor\TagDescriptor":3:{s:7:" * name";s:8:"category";s:14:" * description";O:55:"phpDocumentor\Descriptor\DocBlock\DescriptionDescriptor":2:{s:68:" phpDocumentor\Descriptor\DocBlock\DescriptionDescriptor description";O:45:"phpDocumentor\Reflection\DocBlock\Description":2:{s:59:" phpDocumentor\Reflection\DocBlock\Description bodyTemplate";s:6:"VuFind";s:51:" phpDocumentor\Reflection\DocBlock\Description tags";a:0:{}}s:67:" phpDocumentor\Descriptor\DocBlock\DescriptionDescriptor inlineTags";a:0:{}}s:9:" * errors";O:35:"phpDocumentor\Descriptor\Collection":1:{s:8:" * items";a:0:{}}}}}s:7:"package";O:35:"phpDocumentor\Descriptor\Collection":1:{s:8:" * items";a:1:{i:0;O:38:"phpDocumentor\Descriptor\TagDescriptor":3:{s:7:" * name";s:7:"package";s:14:" * description";O:55:"phpDocumentor\Descriptor\DocBlock\DescriptionDescriptor":2:{s:68:" phpDocumentor\Descriptor\DocBlock\DescriptionDescriptor description";O:45:"phpDocumentor\Reflection\DocBlock\Description":2:{s:59:" phpDocumentor\Reflection\DocBlock\Description bodyTemplate";s:13:"Error_Logging";s:51:" phpDocumentor\Reflection\DocBlock\Description tags";a:0:{}}s:67:" phpDocumentor\Descriptor\DocBlock\DescriptionDescriptor inlineTags";a:0:{}}s:9:" * errors";O:35:"phpDocumentor\Descriptor\Collection":1:{s:8:" * items";a:0:{}}}}}s:6:"author";O:35:"phpDocumentor\Descriptor\Collection":1:{s:8:" * items";a:1:{i:0;O:45:"phpDocumentor\Descriptor\Tag\AuthorDescriptor":3:{s:7:" * name";s:6:"author";s:14:" * description";O:55:"phpDocumentor\Descriptor\DocBlock\DescriptionDescriptor":2:{s:68:" phpDocumentor\Descriptor\DocBlock\DescriptionDescriptor description";O:45:"phpDocumentor\Reflection\DocBlock\Description":2:{s:59:" phpDocumentor\Reflection\DocBlock\Description bodyTemplate";s:39:"Chris Hallberg <challber@villanova.edu>";s:51:" phpDocumentor\Reflection\DocBlock\Description tags";a:0:{}}s:67:" phpDocumentor\Descriptor\DocBlock\DescriptionDescriptor inlineTags";a:0:{}}s:9:" * errors";O:35:"phpDocumentor\Descriptor\Collection":1:{s:8:" * items";a:0:{}}}}}s:7:"license";O:35:"phpDocumentor\Descriptor\Collection":1:{s:8:" * items";a:1:{i:0;O:38:"phpDocumentor\Descriptor\TagDescriptor":3:{s:7:" * name";s:7:"license";s:14:" * description";O:55:"phpDocumentor\Descriptor\DocBlock\DescriptionDescriptor":2:{s:68:" phpDocumentor\Descriptor\DocBlock\DescriptionDescriptor description";O:45:"phpDocumentor\Reflection\DocBlock\Description":2:{s:59:" phpDocumentor\Reflection\DocBlock\Description bodyTemplate";s:69:"http://opensource.org/licenses/gpl-2.0.php GNU General Public License";s:51:" phpDocumentor\Reflection\DocBlock\Description tags";a:0:{}}s:67:" phpDocumentor\Descriptor\DocBlock\DescriptionDescriptor inlineTags";a:0:{}}s:9:" * errors";O:35:"phpDocumentor\Descriptor\Collection":1:{s:8:" * items";a:0:{}}}}}s:4:"link";O:35:"phpDocumentor\Descriptor\Collection":1:{s:8:" * items";a:1:{i:0;O:43:"phpDocumentor\Descriptor\Tag\LinkDescriptor":4:{s:7:" * name";s:4:"link";s:14:" * description";O:55:"phpDocumentor\Descriptor\DocBlock\DescriptionDescriptor":2:{s:68:" phpDocumentor\Descriptor\DocBlock\DescriptionDescriptor description";O:45:"phpDocumentor\Reflection\DocBlock\Description":2:{s:59:" phpDocumentor\Reflection\DocBlock\Description bodyTemplate";s:9:"Main Site";s:51:" phpDocumentor\Reflection\DocBlock\Description tags";a:0:{}}s:67:" phpDocumentor\Descriptor\DocBlock\DescriptionDescriptor inlineTags";a:0:{}}s:9:" * errors";O:35:"phpDocumentor\Descriptor\Collection":1:{s:8:" * items";a:0:{}}s:7:" * link";s:18:"https://vufind.org";}}}}}s:9:" * errors";O:35:"phpDocumentor\Descriptor\Collection":1:{s:8:" * items";a:0:{}}s:19:" * inheritedElement";N;s:7:" * hash";s:32:"8980aeca94a00bb187fdb3a5610b245b";s:7:" * path";s:32:"VuFind/src/VuFind/Log/Logger.php";s:9:" * source";s:9044:"<?php

/**
 * VuFind Logger
 *
 * PHP version 8
 *
 * Copyright (C) Villanova University 2010.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * @category VuFind
 * @package  Error_Logging
 * @author   Chris Hallberg <challber@villanova.edu>
 * @license  http://opensource.org/licenses/gpl-2.0.php GNU General Public License
 * @link     https://vufind.org Main Site
 */

namespace VuFind\Log;

use Laminas\Log\Logger as BaseLogger;
use Laminas\Log\Writer\WriterInterface;
use Laminas\Stdlib\SplPriorityQueue;
use Traversable;
use VuFind\Net\UserIpReader;

use function in_array;
use function is_array;
use function is_bool;
use function is_float;
use function is_int;
use function is_object;

/**
 * This class wraps the BaseLogger class to allow for log verbosity
 *
 * @category VuFind
 * @package  Error_Logging
 * @author   Chris Hallberg <challber@villanova.edu>
 * @license  http://opensource.org/licenses/gpl-2.0.php GNU General Public License
 * @link     https://vufind.org Main Site
 */
class Logger extends BaseLogger
{
    /**
     * Is debug logging enabled?
     *
     * @var bool
     */
    protected $debugNeeded = false;

    /**
     * User IP address reader
     *
     * @var UserIpReader
     */
    protected $userIpReader;

    /**
     * Constructor
     *
     * Set options for a logger. Accepted options are:
     * - writers: array of writers to add to this logger
     * - exceptionhandler: if true register this logger as exceptionhandler
     * - errorhandler: if true register this logger as errorhandler
     *
     * @param UserIpReader      $userIpReader User IP reader
     * @param array|Traversable $options      Configuration options
     *
     * @throws \Laminas\Log\Exception\InvalidArgumentException
     */
    public function __construct(UserIpReader $userIpReader, $options = null)
    {
        $this->userIpReader = $userIpReader;
        parent::__construct($options);
    }

    /**
     * Is one of the log writers listening for debug messages?  (This is useful to
     * know, since some code can save time that would be otherwise wasted generating
     * debug messages if we know that no one is listening).
     *
     * @param bool $newState New state (omit to leave current state unchanged)
     *
     * @return bool
     */
    public function debugNeeded($newState = null)
    {
        if (null !== $newState) {
            $this->debugNeeded = $newState;
        }
        return $this->debugNeeded;
    }

    /**
     * Add a message as a log entry
     *
     * @param int               $priority Priority
     * @param mixed             $message  Message
     * @param array|Traversable $extra    Extras
     *
     * @return Logger
     */
    public function log($priority, $message, $extra = [])
    {
        // Special case to handle arrays of messages (for multi-verbosity-level
        // logging, not supported by base class):
        if (is_array($message)) {
            $timestamp = new \DateTime();
            foreach ($this->writers->toArray() as $writer) {
                $writer->write(
                    [
                        'timestamp'    => $timestamp,
                        'priority'     => (int)$priority,
                        'priorityName' => $this->priorities[$priority],
                        'message'      => $message,
                        'extra'        => $extra,
                    ]
                );
            }
            return $this;
        }
        return parent::log($priority, $message, $extra);
    }

    /**
     * Given an exception, return a severity level for logging purposes.
     *
     * @param \Exception $error Exception to analyze
     *
     * @return int
     */
    protected function getSeverityFromException($error)
    {
        // If the exception provides the severity level, use it:
        if ($error instanceof \VuFind\Exception\SeverityLevelInterface) {
            return $error->getSeverityLevel();
        }
        // Treat unexpected or 5xx errors as more severe than 4xx errors.
        if (
            $error instanceof \VuFind\Exception\HttpStatusInterface
            && in_array($error->getHttpStatus(), [403, 404])
        ) {
            return BaseLogger::WARN;
        }
        return BaseLogger::CRIT;
    }

    /**
     * Log an exception triggered by the framework for administrative purposes.
     *
     * @param \Exception                 $error  Exception to log
     * @param \Laminas\Stdlib\Parameters $server Server metadata
     *
     * @return void
     */
    public function logException($error, $server)
    {
        // We need to build a variety of pieces so we can supply
        // information at five different verbosity levels:
        $baseError = $error::class . ' : ' . $error->getMessage();
        $prev = $error->getPrevious();
        while ($prev) {
            $baseError .= ' ; ' . $prev::class . ' : ' . $prev->getMessage();
            $prev = $prev->getPrevious();
        }
        $referer = $server->get('HTTP_REFERER', 'none');
        $ipAddr = $this->userIpReader->getUserIp();
        $basicServer
            = '(Server: IP = ' . $ipAddr . ', '
            . 'Referer = ' . $referer . ', '
            . 'User Agent = '
            . $server->get('HTTP_USER_AGENT') . ', '
            . 'Host = '
            . $server->get('HTTP_HOST') . ', '
            . 'Request URI = '
            . $server->get('REQUEST_URI') . ')';
        $detailedServer = "\nServer Context:\n"
            . print_r($server->toArray(), true);
        $basicBacktrace = $detailedBacktrace = "\nBacktrace:\n";
        if (is_array($error->getTrace())) {
            foreach ($error->getTrace() as $line) {
                if (!isset($line['file'])) {
                    $line['file'] = 'unlisted file';
                }
                if (!isset($line['line'])) {
                    $line['line'] = 'unlisted';
                }
                $basicBacktraceLine = $detailedBacktraceLine = $line['file'] .
                    ' line ' . $line['line'] . ' - ' .
                    (isset($line['class']) ? 'class = ' . $line['class'] . ', ' : '')
                    . 'function = ' . $line['function'];
                $basicBacktrace .= "{$basicBacktraceLine}\n";
                if (!empty($line['args'])) {
                    $args = [];
                    foreach ($line['args'] as $i => $arg) {
                        $args[] = $i . ' = ' . $this->argumentToString($arg);
                    }
                    $detailedBacktraceLine .= ', args: ' . implode(', ', $args);
                } else {
                    $detailedBacktraceLine .= ', args: none.';
                }
                $detailedBacktrace .= "{$detailedBacktraceLine}\n";
            }
        }

        $errorDetails = [
            1 => $baseError,
            2 => $baseError . $basicServer,
            3 => $baseError . $basicServer . $basicBacktrace,
            4 => $baseError . $detailedServer . $basicBacktrace,
            5 => $baseError . $detailedServer . $detailedBacktrace,
        ];

        $this->log($this->getSeverityFromException($error), $errorDetails);
    }

    /**
     * Remove a writer.
     *
     * @param WriterInterface $writer Writer to remove
     *
     * @return void
     */
    public function removeWriter(WriterInterface $writer): void
    {
        $newQueue = new SplPriorityQueue();
        foreach ($this->getWriters() as $i => $current) {
            if ($current !== $writer) {
                $newQueue->insert($current, $i);
            }
        }
        $this->setWriters($newQueue);
    }

    /**
     * Convert function argument to a loggable string
     *
     * @param mixed $arg Argument
     *
     * @return string
     */
    protected function argumentToString($arg)
    {
        if (is_object($arg)) {
            return $arg::class . ' Object';
        }
        if (is_array($arg)) {
            $args = [];
            foreach ($arg as $key => $item) {
                $args[] = "$key => " . $this->argumentToString($item);
            }
            return 'array(' . implode(', ', $args) . ')';
        }
        if (is_bool($arg)) {
            return $arg ? 'true' : 'false';
        }
        if (is_int($arg) || is_float($arg)) {
            return (string)$arg;
        }
        if (null === $arg) {
            return 'null';
        }
        return "'$arg'";
    }
}
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