glastree_on_gitea

vendor/directorytree/imapengine/src/Mbox.php

@@ -0,0 +1,50 @@
+<?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+\s+' // From
+        .'(Mon|Tue|Wed|Thu|Fri|Sat|Sun)\s+' // Day
+        .'(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\s+' // Month
+        .'\d{1,2}\s+\d{2}:\d{2}:\d{2}' // Time (HH:MM:SS)
+        .'(?:\s+[+-]\d{4})?' // Optional Timezone ("+0000")
+        .'\s+\d{4}/' // Year
+    ): 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);
+    }
+}