first commit

administrator/components/com_akeebabackup/engine/Psr/Log/AbstractLogger.php

@@ -0,0 +1,166 @@
+<?php
+/**
+ * Akeeba Engine
+ *
+ * @package   akeebaengine
+ * @copyright Copyright (c)2006-2022 Nicholas K. Dionysopoulos / Akeeba Ltd
+ * @license   GNU General Public License version 3, or later
+ */
+
+namespace Akeeba\Engine\Psr\Log;
+
+/**
+ * This file is part of a privately namespaced copy of PSR-3 version 1.
+ *
+ * You can find the original PSR-3 in https://www.php-fig.org/psr/psr-3/ and the original code in
+ * https://github.com/php-fig/log
+ *
+ * The license of the original code can be found below.
+ *
+ * Copyright (c) 2012 PHP Framework Interoperability Group
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+defined('AKEEBAENGINE') || die();
+
+/**
+ * This is a simple Logger implementation that other Loggers can inherit from.
+ *
+ * It simply delegates all log-level-specific methods to the `log` method to
+ * reduce boilerplate code that a simple Logger that does the same thing with
+ * messages regardless of the error level has to implement.
+ */
+abstract class AbstractLogger implements LoggerInterface
+{
+	/**
+	 * System is unusable.
+	 *
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return void
+	 */
+	public function emergency($message, array $context = [])
+	{
+		$this->log(LogLevel::EMERGENCY, $message, $context);
+	}
+
+	/**
+	 * Action must be taken immediately.
+	 *
+	 * Example: Entire website down, database unavailable, etc. This should
+	 * trigger the SMS alerts and wake you up.
+	 *
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return void
+	 */
+	public function alert($message, array $context = [])
+	{
+		$this->log(LogLevel::ALERT, $message, $context);
+	}
+
+	/**
+	 * Critical conditions.
+	 *
+	 * Example: Application component unavailable, unexpected exception.
+	 *
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return void
+	 */
+	public function critical($message, array $context = [])
+	{
+		$this->log(LogLevel::CRITICAL, $message, $context);
+	}
+
+	/**
+	 * Runtime errors that do not require immediate action but should typically
+	 * be logged and monitored.
+	 *
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return void
+	 */
+	public function error($message, array $context = [])
+	{
+		$this->log(LogLevel::ERROR, $message, $context);
+	}
+
+	/**
+	 * Exceptional occurrences that are not errors.
+	 *
+	 * Example: Use of deprecated APIs, poor use of an API, undesirable things
+	 * that are not necessarily wrong.
+	 *
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return void
+	 */
+	public function warning($message, array $context = [])
+	{
+		$this->log(LogLevel::WARNING, $message, $context);
+	}
+
+	/**
+	 * Normal but significant events.
+	 *
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return void
+	 */
+	public function notice($message, array $context = [])
+	{
+		$this->log(LogLevel::NOTICE, $message, $context);
+	}
+
+	/**
+	 * Interesting events.
+	 *
+	 * Example: User logs in, SQL logs.
+	 *
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return void
+	 */
+	public function info($message, array $context = [])
+	{
+		$this->log(LogLevel::INFO, $message, $context);
+	}
+
+	/**
+	 * Detailed debug information.
+	 *
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return void
+	 */
+	public function debug($message, array $context = [])
+	{
+		$this->log(LogLevel::DEBUG, $message, $context);
+	}
+}

administrator/components/com_akeebabackup/engine/Psr/Log/InvalidArgumentException.php

@@ -0,0 +1,45 @@
+<?php
+/**
+ * Akeeba Engine
+ *
+ * @package   akeebaengine
+ * @copyright Copyright (c)2006-2022 Nicholas K. Dionysopoulos / Akeeba Ltd
+ * @license   GNU General Public License version 3, or later
+ */
+
+namespace Akeeba\Engine\Psr\Log;
+
+/**
+ * This file is part of a privately namespaced copy of PSR-3 version 1.
+ *
+ * You can find the original PSR-3 in https://www.php-fig.org/psr/psr-3/ and the original code in
+ * https://github.com/php-fig/log
+ *
+ * The license of the original code can be found below.
+ *
+ * Copyright (c) 2012 PHP Framework Interoperability Group
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+defined('AKEEBAENGINE') || die();
+
+class InvalidArgumentException extends \InvalidArgumentException
+{
+}

administrator/components/com_akeebabackup/engine/Psr/Log/LogLevel.php

@@ -0,0 +1,56 @@
+<?php
+/**
+ * Akeeba Engine
+ *
+ * @package   akeebaengine
+ * @copyright Copyright (c)2006-2022 Nicholas K. Dionysopoulos / Akeeba Ltd
+ * @license   GNU General Public License version 3, or later
+ */
+
+namespace Akeeba\Engine\Psr\Log;
+
+/**
+ * This file is part of a privately namespaced copy of PSR-3 version 1.
+ *
+ * You can find the original PSR-3 in https://www.php-fig.org/psr/psr-3/ and the original code in
+ * https://github.com/php-fig/log
+ *
+ * The license of the original code can be found below.
+ *
+ * Copyright (c) 2012 PHP Framework Interoperability Group
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+defined('AKEEBAENGINE') || die();
+
+/**
+ * Describes log levels
+ */
+class LogLevel
+{
+	const EMERGENCY = 'emergency';
+	const ALERT = 'alert';
+	const CRITICAL = 'critical';
+	const ERROR = 'error';
+	const WARNING = 'warning';
+	const NOTICE = 'notice';
+	const INFO = 'info';
+	const DEBUG = 'debug';
+}

administrator/components/com_akeebabackup/engine/Psr/Log/LoggerAwareInterface.php

@@ -0,0 +1,56 @@
+<?php
+/**
+ * Akeeba Engine
+ *
+ * @package   akeebaengine
+ * @copyright Copyright (c)2006-2022 Nicholas K. Dionysopoulos / Akeeba Ltd
+ * @license   GNU General Public License version 3, or later
+ */
+
+namespace Akeeba\Engine\Psr\Log;
+
+/**
+ * This file is part of a privately namespaced copy of PSR-3 version 1.
+ *
+ * You can find the original PSR-3 in https://www.php-fig.org/psr/psr-3/ and the original code in
+ * https://github.com/php-fig/log
+ *
+ * The license of the original code can be found below.
+ *
+ * Copyright (c) 2012 PHP Framework Interoperability Group
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+defined('AKEEBAENGINE') || die();
+
+/**
+ * Describes a logger-aware instance
+ */
+interface LoggerAwareInterface
+{
+	/**
+	 * Sets a logger instance on the object
+	 *
+	 * @param   LoggerInterface  $logger
+	 *
+	 * @return null
+	 */
+	public function setLogger(LoggerInterface $logger);
+}

administrator/components/com_akeebabackup/engine/Psr/Log/LoggerAwareTrait.php

@@ -0,0 +1,60 @@
+<?php
+/**
+ * Akeeba Engine
+ *
+ * @package   akeebaengine
+ * @copyright Copyright (c)2006-2022 Nicholas K. Dionysopoulos / Akeeba Ltd
+ * @license   GNU General Public License version 3, or later
+ */
+
+namespace Akeeba\Engine\Psr\Log;
+
+/**
+ * This file is part of a privately namespaced copy of PSR-3 version 1.
+ *
+ * You can find the original PSR-3 in https://www.php-fig.org/psr/psr-3/ and the original code in
+ * https://github.com/php-fig/log
+ *
+ * The license of the original code can be found below.
+ *
+ * Copyright (c) 2012 PHP Framework Interoperability Group
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+defined('AKEEBAENGINE') || die();
+
+/**
+ * Basic Implementation of LoggerAwareInterface.
+ */
+trait LoggerAwareTrait
+{
+	/** @var LoggerInterface */
+	protected $logger;
+
+	/**
+	 * Sets a logger.
+	 *
+	 * @param   LoggerInterface  $logger
+	 */
+	public function setLogger(LoggerInterface $logger)
+	{
+		$this->logger = $logger;
+	}
+}

administrator/components/com_akeebabackup/engine/Psr/Log/LoggerInterface.php

@@ -0,0 +1,161 @@
+<?php
+/**
+ * Akeeba Engine
+ *
+ * @package   akeebaengine
+ * @copyright Copyright (c)2006-2022 Nicholas K. Dionysopoulos / Akeeba Ltd
+ * @license   GNU General Public License version 3, or later
+ */
+
+namespace Akeeba\Engine\Psr\Log;
+
+/**
+ * This file is part of a privately namespaced copy of PSR-3 version 1.
+ *
+ * You can find the original PSR-3 in https://www.php-fig.org/psr/psr-3/ and the original code in
+ * https://github.com/php-fig/log
+ *
+ * The license of the original code can be found below.
+ *
+ * Copyright (c) 2012 PHP Framework Interoperability Group
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+defined('AKEEBAENGINE') || die();
+
+/**
+ * Describes a logger instance
+ *
+ * The message MUST be a string or object implementing __toString().
+ *
+ * The message MAY contain placeholders in the form: {foo} where foo
+ * will be replaced by the context data in key "foo".
+ *
+ * The context array can contain arbitrary data, the only assumption that
+ * can be made by implementors is that if an Exception instance is given
+ * to produce a stack trace, it MUST be in a key named "exception".
+ *
+ * See https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-3-logger-interface.md
+ * for the full interface specification.
+ */
+interface LoggerInterface
+{
+	/**
+	 * System is unusable.
+	 *
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return null
+	 */
+	public function emergency($message, array $context = []);
+
+	/**
+	 * Action must be taken immediately.
+	 *
+	 * Example: Entire website down, database unavailable, etc. This should
+	 * trigger the SMS alerts and wake you up.
+	 *
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return null
+	 */
+	public function alert($message, array $context = []);
+
+	/**
+	 * Critical conditions.
+	 *
+	 * Example: Application component unavailable, unexpected exception.
+	 *
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return null
+	 */
+	public function critical($message, array $context = []);
+
+	/**
+	 * Runtime errors that do not require immediate action but should typically
+	 * be logged and monitored.
+	 *
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return null
+	 */
+	public function error($message, array $context = []);
+
+	/**
+	 * Exceptional occurrences that are not errors.
+	 *
+	 * Example: Use of deprecated APIs, poor use of an API, undesirable things
+	 * that are not necessarily wrong.
+	 *
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return null
+	 */
+	public function warning($message, array $context = []);
+
+	/**
+	 * Normal but significant events.
+	 *
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return null
+	 */
+	public function notice($message, array $context = []);
+
+	/**
+	 * Interesting events.
+	 *
+	 * Example: User logs in, SQL logs.
+	 *
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return null
+	 */
+	public function info($message, array $context = []);
+
+	/**
+	 * Detailed debug information.
+	 *
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return null
+	 */
+	public function debug($message, array $context = []);
+
+	/**
+	 * Logs with an arbitrary level.
+	 *
+	 * @param   mixed   $level
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return null
+	 */
+	public function log($level, $message, array $context = []);
+}

administrator/components/com_akeebabackup/engine/Psr/Log/LoggerTrait.php

@@ -0,0 +1,178 @@
+<?php
+/**
+ * Akeeba Engine
+ *
+ * @package   akeebaengine
+ * @copyright Copyright (c)2006-2022 Nicholas K. Dionysopoulos / Akeeba Ltd
+ * @license   GNU General Public License version 3, or later
+ */
+
+namespace Akeeba\Engine\Psr\Log;
+
+/**
+ * This file is part of a privately namespaced copy of PSR-3 version 1.
+ *
+ * You can find the original PSR-3 in https://www.php-fig.org/psr/psr-3/ and the original code in
+ * https://github.com/php-fig/log
+ *
+ * The license of the original code can be found below.
+ *
+ * Copyright (c) 2012 PHP Framework Interoperability Group
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+defined('AKEEBAENGINE') || die();
+
+/**
+ * This is a simple Logger trait that classes unable to extend AbstractLogger
+ * (because they extend another class, etc) can include.
+ *
+ * It simply delegates all log-level-specific methods to the `log` method to
+ * reduce boilerplate code that a simple Logger that does the same thing with
+ * messages regardless of the error level has to implement.
+ */
+trait LoggerTrait
+{
+	/**
+	 * System is unusable.
+	 *
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return null
+	 */
+	public function emergency($message, array $context = [])
+	{
+		$this->log(LogLevel::EMERGENCY, $message, $context);
+	}
+
+	/**
+	 * Action must be taken immediately.
+	 *
+	 * Example: Entire website down, database unavailable, etc. This should
+	 * trigger the SMS alerts and wake you up.
+	 *
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return null
+	 */
+	public function alert($message, array $context = [])
+	{
+		$this->log(LogLevel::ALERT, $message, $context);
+	}
+
+	/**
+	 * Critical conditions.
+	 *
+	 * Example: Application component unavailable, unexpected exception.
+	 *
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return null
+	 */
+	public function critical($message, array $context = [])
+	{
+		$this->log(LogLevel::CRITICAL, $message, $context);
+	}
+
+	/**
+	 * Runtime errors that do not require immediate action but should typically
+	 * be logged and monitored.
+	 *
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return null
+	 */
+	public function error($message, array $context = [])
+	{
+		$this->error($message, $context);
+	}
+
+	/**
+	 * Exceptional occurrences that are not errors.
+	 *
+	 * Example: Use of deprecated APIs, poor use of an API, undesirable things
+	 * that are not necessarily wrong.
+	 *
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return null
+	 */
+	public function warning($message, array $context = [])
+	{
+		$this->warning($message, $context);
+	}
+
+	/**
+	 * Normal but significant events.
+	 *
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return null
+	 */
+	public function notice($message, array $context = [])
+	{
+		$this->log(LogLevel::NOTICE, $message, $context);
+	}
+
+	/**
+	 * Interesting events.
+	 *
+	 * Example: User logs in, SQL logs.
+	 *
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return null
+	 */
+	public function info($message, array $context = [])
+	{
+		$this->info($message, $context);
+	}
+
+	/**
+	 * Detailed debug information.
+	 *
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return null
+	 */
+	public function debug($message, array $context = [])
+	{
+		$this->debug($message, $context);
+	}
+
+	/**
+	 * Logs with an arbitrary level.
+	 *
+	 * @param   mixed   $level
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return null
+	 */
+	abstract public function log($level, $message, array $context = []);
+}

administrator/components/com_akeebabackup/engine/Psr/Log/NullLogger.php

@@ -0,0 +1,66 @@
+<?php
+/**
+ * Akeeba Engine
+ *
+ * @package   akeebaengine
+ * @copyright Copyright (c)2006-2022 Nicholas K. Dionysopoulos / Akeeba Ltd
+ * @license   GNU General Public License version 3, or later
+ */
+
+namespace Akeeba\Engine\Psr\Log;
+
+/**
+ * This file is part of a privately namespaced copy of PSR-3 version 1.
+ *
+ * You can find the original PSR-3 in https://www.php-fig.org/psr/psr-3/ and the original code in
+ * https://github.com/php-fig/log
+ *
+ * The license of the original code can be found below.
+ *
+ * Copyright (c) 2012 PHP Framework Interoperability Group
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+defined('AKEEBAENGINE') || die();
+
+/**
+ * This Logger can be used to avoid conditional log calls
+ *
+ * Logging should always be optional, and if no logger is provided to your
+ * library creating a NullLogger instance to have something to throw logs at
+ * is a good way to avoid littering your code with `if ($this->logger) { }`
+ * blocks.
+ */
+class NullLogger extends AbstractLogger
+{
+	/**
+	 * Logs with an arbitrary level.
+	 *
+	 * @param   mixed   $level
+	 * @param   string  $message
+	 * @param   array   $context
+	 *
+	 * @return null
+	 */
+	public function log($level, $message, array $context = [])
+	{
+		// noop
+	}
+}