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<?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);
});
}
}
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