Messages: Add ability to native save mail content to file

src/Message.php

@@ -133,6 +133,14 @@ public function getRawMessage(): string
         return $this->rawMessage;
     }
 
+    /**
+     * @param resource|string $file the path to the saved file as a string, or a valid file descriptor
+     */
+    public function saveRawMessage($file): void
+    {
+        $this->doSaveContent($file, '');
+    }
+
     public function getHeaders(): Message\Headers
     {
         if (null === $this->headers) {

src/Message/AbstractPart.php

@@ -256,6 +256,26 @@ final protected function doGetContent(string $partNumber): string
         return $return;
     }
 
+    /**
+     * Save raw message content to file.
+     *
+     * @param resource|string $file the path to the saved file as a string, or a valid file descriptor
+     */
+    final protected function doSaveContent($file, string $partNumber): void
+    {
+        $return = \imap_savebody(
+            $this->resource->getStream(),
+            $file,
+            $this->getNumber(),
+            $partNumber,
+            \FT_UID | \FT_PEEK
+        );
+
+        if (false === $return) {
+            throw new ImapFetchbodyException('imap_savebody failed');
+        }
+    }
+
     final public function getParts(): array
     {
         $this->lazyParseStructure();

src/Message/BasicMessageInterface.php

@@ -18,6 +18,13 @@ public function getRawHeaders(): string;
      */
     public function getRawMessage(): string;
 
+    /**
+     * Save the raw message, including all headers, parts, etc. unencoded and unparsed to file.
+     *
+     * @param resource|string $file the path to the saved file as a string, or a valid file descriptor
+     */
+    public function saveRawMessage($file): void;
+
     /**
      * Get message headers.
      */

src/Message/EmbeddedMessage.php

@@ -38,6 +38,14 @@ public function getRawMessage(): string
         return $this->rawMessage;
     }
 
+    /**
+     * @param resource|string $file the path to the saved file as a string, or a valid file descriptor
+     */
+    public function saveRawMessage($file): void
+    {
+        $this->doSaveContent($file, $this->getPartNumber());
+    }
+
     /**
      * Get content part number.
      */

tests/EmbeddedMessageTest.php

@@ -162,4 +162,32 @@ public function testEmbeddedMessageWithoutContentDisposition(): void
         static::assertNotEmpty($attachment->getContent());
         static::assertSame('file4.zip', $attachment->getFilename());
     }
+
+    public function testSaveEmbeddedMessage(): void
+    {
+        $mailbox = $this->createMailbox();
+        $raw     = $this->getFixture('embedded_email_without_content_disposition');
+        $mailbox->addMessage($raw);
+
+        $message     = $mailbox->getMessage(1);
+        $attachments = $message->getAttachments();
+
+        // skip 1. non-embedded attachment (file.jpg) to embedded one
+        $attachment = \next($attachments);
+        static::assertNotFalse($attachment);
+        static::assertTrue($attachment->isEmbeddedMessage());
+
+        $embeddedMessage = $attachment->getEmbeddedMessage();
+
+        $file = \fopen('php://temp', 'w+');
+        if (false === $file) {
+            static::fail('Unable to create temporary file stream');
+        }
+
+        $embeddedMessage->saveRawMessage($file);
+        \fseek($file, 0);
+
+        $rawEmbedded = $this->getFixture('embedded_email_without_content_disposition-embedded');
+        static::assertSame($rawEmbedded, \stream_get_contents($file));
+    }
 }

tests/MessageTest.php

@@ -748,6 +748,45 @@ public function testGetRawMessage(): void
         static::assertSame($fixture, $message->getRawMessage());
     }
 
+    public function testSaveFileRawMessage(): void
+    {
+        $fixture = $this->getFixture('structured_with_attachment');
+        $this->mailbox->addMessage($fixture);
+
+        $message = $this->mailbox->getMessage(1);
+
+        $filename = \tempnam(\sys_get_temp_dir(), 'testSaveFileRawMessage');
+        if (false === $filename) {
+            static::fail('Unable to create temporary file');
+        }
+
+        $message->saveRawMessage($filename);
+
+        static::assertSame($fixture, \file_get_contents($filename));
+
+        \unlink($filename);
+    }
+
+    public function testSaveResourceRawMessage(): void
+    {
+        $fixture = $this->getFixture('structured_with_attachment');
+        $this->mailbox->addMessage($fixture);
+
+        $message = $this->mailbox->getMessage(1);
+
+        $file = \fopen('php://temp', 'w+');
+        if (false === $file) {
+            static::fail('Unable to create temporary file stream');
+        }
+
+        $message->saveRawMessage($file);
+        \fseek($file, 0);
+
+        static::assertSame($fixture, \stream_get_contents($file));
+
+        \fclose($file);
+    }
+
     public function testAttachmentOnlyEmail(): void
     {
         $fixture = $this->getFixture('mail_that_is_attachment');

tests/fixtures/embedded_email_without_content_disposition-embedded.eml

@@ -0,0 +1,61 @@
+Received: from webmail.my-office.cz (localhost [127.0.0.1])
+	by keira.cofis.cz
+	; Fri, 29 Jan 2016 14:25:40 +0100
+From: [email protected]
+To: [email protected]
+Date: Fri, 5 Apr 2019 12:10:49 +0200
+Subject: embedded_message_subject
+Message-ID: <[email protected]>
+Accept-Language: pl-PL, nl-NL
+Content-Language: pl-PL
+Content-Type: multipart/mixed;
+	boundary="_005_AC39946EBF5C034B87BABD5343E96979012671D40E38VM002emonsn_"
+MIME-Version: 1.0
+
+--_005_AC39946EBF5C034B87BABD5343E96979012671D40E38VM002emonsn_
+Content-Type: multipart/alternative;
+	boundary="_000_AC39946EBF5C034B87BABD5343E96979012671D40E38VM002emonsn_"
+
+--_000_AC39946EBF5C034B87BABD5343E96979012671D40E38VM002emonsn_
+Content-Type: text/plain; charset="iso-8859-2"
+Content-Transfer-Encoding: quoted-printable
+
+some txt
+
+
+
+
+
+--_000_AC39946EBF5C034B87BABD5343E96979012671D40E38VM002emonsn_
+Content-Type: text/html; charset="iso-8859-2"
+Content-Transfer-Encoding: quoted-printable
+
+<html>
+ <p>some txt</p>
+</html>
+
+--_000_AC39946EBF5C034B87BABD5343E96979012671D40E38VM002emonsn_--
+
+--_005_AC39946EBF5C034B87BABD5343E96979012671D40E38VM002emonsn_
+Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;
+	name="file1.xlsx"
+Content-Description: file1.xlsx
+Content-Disposition: attachment; filename="file1.xlsx"; size=29;
+	creation-date="Fri, 05 Apr 2019 10:06:01 GMT";
+	modification-date="Fri, 05 Apr 2019 10:10:49 GMT"
+Content-Transfer-Encoding: base64
+
+IHRoaXMgaXMgY29udGVudCBvZiB0ZXN0IGZpbGU=
+
+--_005_AC39946EBF5C034B87BABD5343E96979012671D40E38VM002emonsn_
+Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;
+	name="file2.xlsx"
+Content-Description: file2
+Content-Disposition: attachment; filename="file2.xlsx"; size=29;
+	creation-date="Fri, 05 Apr 2019 10:10:19 GMT";
+	modification-date="Wed, 03 Apr 2019 11:04:32 GMT"
+Content-Transfer-Encoding: base64
+
+IHRoaXMgaXMgY29udGVudCBvZiB0ZXN0IGZpbGU=
+
+--_005_AC39946EBF5C034B87BABD5343E96979012671D40E38VM002emonsn_--