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17 changes: 15 additions & 2 deletions src/Message.php
Original file line number Diff line number Diff line change
Expand Up @@ -1176,7 +1176,7 @@ public function restore(bool $expunge = true): bool {
*/
public function setFlag(array|string $flag): bool {
$this->client->openFolder($this->folder_path);
$flag = "\\" . trim(is_array($flag) ? implode(" \\", $flag) : $flag);
$flag = self::sanitizeFlags($flag);
$sequence_id = $this->getSequenceId();
try {
$status = $this->client->getConnection()->store([$flag], $sequence_id, $sequence_id, "+", true, $this->sequence)->validatedData();
Expand Down Expand Up @@ -1207,7 +1207,7 @@ public function setFlag(array|string $flag): bool {
public function unsetFlag(array|string $flag): bool {
$this->client->openFolder($this->folder_path);

$flag = "\\" . trim(is_array($flag) ? implode(" \\", $flag) : $flag);
$flag = self::sanitizeFlags($flag);
$sequence_id = $this->getSequenceId();
try {
$status = $this->client->getConnection()->store([$flag], $sequence_id, $sequence_id, "-", true, $this->sequence)->validatedData();
Expand Down Expand Up @@ -1257,6 +1257,19 @@ public function removeFlag(array|string $flag): bool {
return $this->unsetFlag($flag);
}

/**
* Format the flag string.
* Allows keywords like $MDNSent or $Forwarded
* @param array|string $flag
*
* @return string
*/
public static function sanitizeFlags(array|string $flag): string {
return trim(is_array($flag)
? (implode(" ", array_map(fn ($flag) => str_starts_with($flag, '$') ? $flag : "\\$flag", $flag)))
: (str_starts_with($flag, '$') ? $flag : "\\$flag"));
}

/**
* Get all message attachments.
*
Expand Down
6 changes: 6 additions & 0 deletions tests/MessageTest.php
Original file line number Diff line number Diff line change
Expand Up @@ -263,6 +263,12 @@ public function testIssue348() {
self::assertSame("application/pdf", $attachment->getMimeType());
}

public function testSanitizeFlag(): void {
self::assertEquals('\\Seen', Message::sanitizeFlags('Seen'));
self::assertEquals('$Forwarded', Message::sanitizeFlags('$Forwarded'));
self::assertEquals('\\Seen $MDNSent $Junk \\Flagged', Message::sanitizeFlags(['Seen', '$MDNSent', '$Junk', 'Flagged']));
}

/**
* Create a new protocol mockup
*
Expand Down