Align Checker port resolution and add delimiter preconfig support

config.inc.php.dist

@@ -40,6 +40,10 @@ $config['ident_switch.preconfig'] = [
 		// Any other value is treated as 'not specified' (default).
 		'user' => 'email',
 
+		// IMAP folder hierarchy delimiter.
+		// Omit or set to null for auto-detect (recommended).
+		// 'delimiter' => '/',
+
 		// Are specified settings locked in interface or not.
 		// Default - false.
 		'readonly' => true,

lib/IdentSwitchChecker.php

@@ -112,26 +112,24 @@ class IdentSwitchChecker
 		$imap = new rcube_imap_generic();
 
 		$host = $identity['imap_host'] ?: 'localhost';
-		$port = $identity['imap_port'] ?: 143;
+		$ssl = null;
-		$ssl = false;
 
-		if (!empty($identity['flags']) && ($identity['flags'] & ident_switch::DB_SECURE_IMAP_TLS)) {
+		// Parse scheme from host field
-			$ssl = 'tls';
-		}
-
-		// Strip and parse protocol prefix from host
 		$hostLower = strtolower($host);
-		if (str_starts_with($hostLower, 'tls://')) {
+		if (str_starts_with($hostLower, 'ssl://')) {
-			$ssl = 'tls';
-			$host = substr($host, 6);
-		} elseif (str_starts_with($hostLower, 'ssl://')) {
 			$ssl = 'ssl';
 			$host = substr($host, 6);
-			if (!$identity['imap_port']) {
+		} elseif (str_starts_with($hostLower, 'tls://')) {
-				$port = 993;
+			$ssl = 'tls';
-			}
+			$host = substr($host, 6);
+		} elseif (!empty($identity['flags']) && ($identity['flags'] & ident_switch::DB_SECURE_IMAP_TLS)) {
+			// Backward compat: old records without scheme in host
+			$ssl = 'tls';
 		}
 
+		$def_port = ($ssl === 'ssl') ? 993 : 143;
+		$port = $identity['imap_port'] ?: $def_port;
+
 		$username = $identity['username'] ?: $identity['email'];
 		$password = $rc->decrypt($identity['password']);
 

lib/IdentSwitchForm.php

@@ -317,6 +317,8 @@ class IdentSwitchForm
 				if (in_array(strtoupper($cfg['user'] ?? ''), ['EMAIL', 'MBOX'])) {
 					$record['ident_switch.form.common.readonly'] = 2;
 				}
+				// Override delimiter from preconfig (auto-detect if not specified)
+				$record['ident_switch.form.imap.delimiter'] = $cfg['delimiter'] ?? null;
 			}
 		} else {
 			$preconfig->apply($record);
@@ -505,6 +507,7 @@ class IdentSwitchForm
 		$map = [
 			'ident_switch.form.imap.host' => 'imap.host',
 			'ident_switch.form.imap.port' => 'imap.port',
+			'ident_switch.form.imap.delimiter' => 'imap.delimiter',
 			'ident_switch.form.imap.username' => 'imap.user',
 			'ident_switch.form.smtp.host' => 'smtp.host',
 			'ident_switch.form.smtp.port' => 'smtp.port',

lib/IdentSwitchPreconfig.php

@@ -51,13 +51,8 @@ class IdentSwitchPreconfig
 	/**
 	 * Apply preconfigured settings to an identity form record.
 	 *
-	 * Parses IMAP and SMTP host URLs separately to extract scheme, host,
+	 * Parses IMAP, SMTP, and Sieve host URLs to extract scheme, host,
-	 * and port, then sets the username based on the config's 'user' setting.
+	 * and port, then sets the username and delimiter based on config values.
-	 *
-	 * Supports both new format (imap_host + smtp_host) and legacy format
-	 * (single host for both). Schemes ssl:// and tls:// are handled:
-	 * - IMAP: ssl:// is stored in host field, tls:// sets the TLS checkbox.
-	 * - SMTP: scheme is stored directly in host field.
 	 *
 	 * @param array $record Identity record to modify (passed by reference).
 	 * @return bool True if the preconfig is readonly, false otherwise.
@@ -106,6 +101,11 @@ class IdentSwitchPreconfig
 				$record['ident_switch.form.common.readonly'] = $loginSet ? 2 : 1;
 			}
 
+			// IMAP folder hierarchy delimiter (null or absent = auto-detect)
+		if (isset($cfg['delimiter'])) {
+			$record['ident_switch.form.imap.delimiter'] = $cfg['delimiter'];
+		}
+
 		// Notification defaults from preconfig
 			if (isset($cfg['notify_check'])) {
 				$record['ident_switch.form.notify.check'] = $cfg['notify_check'] ? 1 : 0;