<?php

namespace DirectoryTree\ImapEngine;

use DirectoryTree\ImapEngine\Exceptions\RuntimeException;

use Generator;

class Mbox

{

/**

* Constructor.

*/

public function __construct(

protected string $filepath

) {}

/**

* Get the messages from the mbox file.

*/

public function messages(

string $delimiter = '/^From \\S+\\s+(Mon|Tue|Wed|Thu|Fri|Sat|Sun)\\s+(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\\s+\\d{1,2}\\s+\\d{2}:\\d{2}:\\d{2}\\s+\\d{4}/'

): Generator {

if (! $handle = fopen($this->filepath, 'r')) {

throw new RuntimeException('Failed to open mbox file: '.$this->filepath);

}

$buffer = '';

while (($line = fgets($handle)) !== false) {

if (preg_match($delimiter, $line) && $buffer !== '') {

yield new FileMessage($buffer);

$buffer = '';

}

$buffer .= $line;

}

if ($buffer !== '') {

yield new FileMessage($buffer);

}

fclose($handle);

}

}