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<?php
namespace PhpOffice\PhpSpreadsheet\Calculation\Engine;
class Logger
{
/**
* Flag to determine whether a debug log should be generated by the calculation engine
* If true, then a debug log will be generated
* If false, then a debug log will not be generated.
*
* @var bool
*/
private $writeDebugLog = false;
/**
* Flag to determine whether a debug log should be echoed by the calculation engine
* If true, then a debug log will be echoed
* If false, then a debug log will not be echoed
* A debug log can only be echoed if it is generated.
*
* @var bool
*/
private $echoDebugLog = false;
/**
* The debug log generated by the calculation engine.
*
* @var string[]
*/
private $debugLog = [];
/**
* The calculation engine cell reference stack.
*
* @var CyclicReferenceStack
*/
private $cellStack;
/**
* Instantiate a Calculation engine logger.
*/
public function __construct(CyclicReferenceStack $stack)
{
$this->cellStack = $stack;
}
/**
* Enable/Disable Calculation engine logging.
*
* @param bool $writeDebugLog
*/
public function setWriteDebugLog($writeDebugLog): void
{
$this->writeDebugLog = $writeDebugLog;
}
/**
* Return whether calculation engine logging is enabled or disabled.
*
* @return bool
*/
public function getWriteDebugLog()
{
return $this->writeDebugLog;
}
/**
* Enable/Disable echoing of debug log information.
*
* @param bool $echoDebugLog
*/
public function setEchoDebugLog($echoDebugLog): void
{
$this->echoDebugLog = $echoDebugLog;
}
/**
* Return whether echoing of debug log information is enabled or disabled.
*
* @return bool
*/
public function getEchoDebugLog()
{
return $this->echoDebugLog;
}
/**
* Write an entry to the calculation engine debug log.
*
* @param mixed $args
*/
public function writeDebugLog(string $message, ...$args): void
{
// Only write the debug log if logging is enabled
if ($this->writeDebugLog) {
$message = sprintf($message, ...$args);
$cellReference = implode(' -> ', $this->cellStack->showStack());
if ($this->echoDebugLog) {
echo $cellReference,
($this->cellStack->count() > 0 ? ' => ' : ''),
$message,
PHP_EOL;
}
$this->debugLog[] = $cellReference .
($this->cellStack->count() > 0 ? ' => ' : '') .
$message;
}
}
/**
* Write a series of entries to the calculation engine debug log.
*
* @param string[] $args
*/
public function mergeDebugLog(array $args): void
{
if ($this->writeDebugLog) {
foreach ($args as $entry) {
$this->writeDebugLog($entry);
}
}
}
/**
* Clear the calculation engine debug log.
*/
public function clearLog(): void
{
$this->debugLog = [];
}
/**
* Return the calculation engine debug log.
*
* @return string[]
*/
public function getLog()
{
return $this->debugLog;
}
}
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