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✏️ Editing: class-debug-log-reader.php Writable

<?php

/**
 * Class MC4WP_Debug_Log_Reader
 */
class MC4WP_Debug_Log_Reader
{
    /**
     * @var resource|null
     */
    private $handle;

/**
     * @var string
     */
    private static $regex = '/^(\[[\d \-\:]+\]) (\w+\:) (.*)$/S';

/**
 * @var string
 */
 private static $html_template = '$1 $2 $3';

/**
     * @var string The log file location.
     */
    private $file;

/**
     * MC4WP_Debug_Log_Reader constructor.
     *
     * @param $file
     */
    public function __construct($file)
    {
        $this->file = $file;
    }

/**
     * @return string
     */
    public function all()
    {
        return file_get_contents($this->file);
    }

/**
     * Sets file pointer to $n of lines from the end of file.
     *
     * @param int $n
     */
    private function seek_line_from_end($n)
    {
        $line_count = 0;

// get line count
        while (! feof($this->handle)) {
            fgets($this->handle);
            ++$line_count;
        }

// rewind to beginning
        rewind($this->handle);

// calculate target
        $target  = $line_count - $n;
        $target  = $target > 1 ? $target : 1; // always skip first line because oh PHP header
        $current = 0;

// keep reading until we're at target
 while ($current < $target) {
 fgets($this->handle);
 ++$current;
 }
 }

/**
     * @return string|null
     */
    public function read()
    {

// open file if not yet opened
        if (! is_resource($this->handle)) {
            // doesn't exist?
            if (! file_exists($this->file)) {
                return null;
            }

$this->handle = @fopen($this->file, 'r'); // phpcs:ignore

// unable to read?
            if (! is_resource($this->handle)) {
                return null;
            }

// set pointer to 1000 lines from EOF
            $this->seek_line_from_end(1000);
        }

// stop reading once we're at the end
        if (feof($this->handle)) {
            fclose($this->handle); // phpcs:ignore 
            $this->handle = null;
            return null;
        }

$text = fgets($this->handle);
        if ($text === false) {
            return null;
        }
        return trim($text);
    }

/**
     * @return null|string
     */
    public function read_as_html()
    {
        $line = $this->read();

// null means end of file
        if (null === $line) {
            return null;
        }

// empty string means empty line, but not yet eof
        if ('' === $line) {
            return '';
        }

return preg_replace(self::$regex, self::$html_template, $line);
    }
}

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