%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
/**
* SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-FileCopyrightText: 2015 ownCloud, Inc.
* SPDX-License-Identifier: AGPL-3.0-only
*/
namespace OCA\LogReader\Log;
/**
* @template-implements \Iterator<int,array>
*/
class LogIterator implements \Iterator {
/**
* @var resource
*/
private $handle;
private string $dateFormat;
private \DateTimeZone $timezone;
private string $buffer = '';
private string $lastLine = '';
private int $position = 0;
private int $currentKey = -1;
public const CHUNK_SIZE = 8192; // how many chars do we try at once to find a new line
/**
* @param resource $handle
* @param string $dateFormat
* @param string $timezone
*/
public function __construct($handle, string $dateFormat, string $timezone) {
$this->handle = $handle;
$this->dateFormat = $dateFormat;
$this->timezone = new \DateTimeZone($timezone);
$this->rewind();
}
public function rewind(): void {
fseek($this->handle, 0, SEEK_END);
$this->position = ftell($this->handle);
$this->lastLine = '';
$this->buffer = '';
$this->currentKey = -1;
$this->next();
}
/**
* @return array
*/
#[\ReturnTypeWillChange]
public function current() {
$entry = json_decode($this->lastLine, true);
if ($this->dateFormat !== \DateTime::ATOM) {
if (isset($entry['time'])) {
$time = \DateTime::createFromFormat($this->dateFormat, $entry['time'], $this->timezone);
if ($time) {
$entry['time'] = $time->format(\DateTime::ATOM);
}
}
}
return $entry;
}
public function key(): int {
return $this->currentKey;
}
private function fillBuffer(): void {
$chunkSize = min($this->position, self::CHUNK_SIZE);
$this->position -= $chunkSize;
fseek($this->handle, $this->position);
$chunk = fread($this->handle, $chunkSize);
$this->buffer = $chunk . $this->buffer;
}
public function next(): void {
// Loop through each character of the file looking for new lines
while ($this->position >= 0) {
$newlinePos = strrpos($this->buffer, "\n");
if ($newlinePos !== false) {
if ($newlinePos + 1 === strlen($this->buffer)) {
// try again with truncated buffer if it ends with newline, i.e. on first call
$this->buffer = substr($this->buffer, 0, $newlinePos);
continue;
}
$this->lastLine = substr($this->buffer, $newlinePos + 1);
$this->buffer = substr($this->buffer, 0, $newlinePos);
$this->currentKey++;
return;
} elseif ($this->position === 0) {
$this->lastLine = $this->buffer;
$this->buffer = '';
$this->currentKey++;
return;
} else {
$this->fillBuffer();
}
}
}
public function valid(): bool {
if (!is_resource($this->handle)) {
return false;
}
if ($this->lastLine === '' && $this->position === 0) {
return false;
}
return true;
}
}
Zerion Mini Shell 1.0