name : ExceptionIdle.php <?php /** * Hoa * * * @license * * New BSD License * * Copyright © 2007-2017, Hoa community. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * Neither the name of the Hoa nor the names of its contributors may be * used to endorse or promote products derived from this software without * specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ namespace Psy\Readline\Hoa; /** * `Hoa\Exception\Idle` is the mother exception class of libraries. The only * difference between `Hoa\Exception\Idle` and its direct children * `Hoa\Exception` is that the latter fires events after beeing constructed. */ class ExceptionIdle extends \Exception { /** * Delay processing on arguments. */ protected $_tmpArguments = null; /** * List of arguments to format message. */ protected $_arguments = null; /** * Backtrace. */ protected $_trace = null; /** * Previous exception if any. */ protected $_previous = null; /** * Original exception message. */ protected $_rawMessage = null; /** * Allocates a new exception. * * An exception is built with a formatted message, a code (an ID) and an * array that contains the list of formatted strings for the message. If * chaining, we can add a previous exception. */ public function __construct( string $message, int $code = 0, $arguments = [], ?\Exception $previous = null ) { $this->_tmpArguments = $arguments; parent::__construct($message, $code, $previous); $this->_rawMessage = $message; $this->message = @\vsprintf($message, $this->getArguments()); return; } /** * Returns the backtrace. * * Do not use `Exception::getTrace` any more. */ public function getBacktrace() { if (null === $this->_trace) { $this->_trace = $this->getTrace(); } return $this->_trace; } /** * Returns the previous exception if any. * * Do not use `Exception::getPrevious` any more. */ public function getPreviousThrow() { if (null === $this->_previous) { $this->_previous = $this->getPrevious(); } return $this->_previous; } /** * Returns the arguments of the message. */ public function getArguments() { if (null === $this->_arguments) { $arguments = $this->_tmpArguments; if (!\is_array($arguments)) { $arguments = [$arguments]; } foreach ($arguments as &$value) { if (null === $value) { $value = '(null)'; } } $this->_arguments = $arguments; unset($this->_tmpArguments); } return $this->_arguments; } /** * Returns the raw message. */ public function getRawMessage(): string { return $this->_rawMessage; } /** * Returns the message already formatted. */ public function getFormattedMessage(): string { return $this->getMessage(); } /** * Returns the source of the exception (class, method, function, main etc.). */ public function getFrom(): string { $trace = $this->getBacktrace(); $from = '{main}'; if (!empty($trace)) { $t = $trace[0]; $from = ''; if (isset($t['class'])) { $from .= $t['class'].'::'; } if (isset($t['function'])) { $from .= $t['function'].'()'; } } return $from; } /** * Raises an exception as a string. */ public function raise(bool $includePrevious = false): string { $message = $this->getFormattedMessage(); $trace = $this->getBacktrace(); $file = '/dev/null'; $line = -1; $pre = $this->getFrom(); if (!empty($trace)) { $file = $trace['file'] ?? null; $line = $trace['line'] ?? null; } $pre .= ': '; try { $out = $pre.'('.$this->getCode().') '.$message."\n". 'in '.$this->getFile().' at line '. $this->getLine().'.'; } catch (\Exception $e) { $out = $pre.'('.$this->getCode().') '.$message."\n". 'in '.$file.' around line '.$line.'.'; } if (true === $includePrevious && null !== $previous = $this->getPreviousThrow()) { $out .= "\n\n".' ⬇'."\n\n". 'Nested exception ('.\get_class($previous).'):'."\n". ($previous instanceof self ? $previous->raise(true) : $previous->getMessage()); } return $out; } /** * Catches uncaught exception (only `Hoa\Exception\Idle` and children). */ public static function uncaught(\Throwable $exception) { if (!($exception instanceof self)) { throw $exception; } while (0 < \ob_get_level()) { \ob_end_flush(); } echo 'Uncaught exception ('.\get_class($exception).'):'."\n". $exception->raise(true); } /** * String representation of object. */ public function __toString(): string { return $this->raise(); } /** * Enables uncaught exception handler. * * This is restricted to Hoa's exceptions only. */ public static function enableUncaughtHandler(bool $enable = true) { if (false === $enable) { return \restore_exception_handler(); } return \set_exception_handler(function ($exception) { return self::uncaught($exception); }); } }