add support for comma-separated groups in group mapping attribute

Signed-off-by: Julien Veyssier <julien-nc@posteo.net>

lib/Service/ProvisioningService.php

@@ -398,6 +398,11 @@ public function getSyncGroupsOfToken(int $providerId, object $idTokenPayload) {
 		if ($event->hasValue() && $event->getValue() !== null) {
 			// casted to null if empty value
 			$groups = json_decode($event->getValue() ?? '');
+			// support values like group1,group2
+			if (is_string($groups)) {
+				$groups = explode(',', $groups);
+				$groups = array_filter($groups);
+			}
 			$syncGroups = [];
 
 			foreach ($groups as $k => $v) {

src/components/SettingsForm.vue

@@ -238,7 +238,7 @@
 			{{ t('user_oidc', 'Use group provisioning.') }}
 		</NcCheckboxRadioSwitch>
 		<p class="settings-hint">
-			{{ t('user_oidc', 'This will create and update the users groups depending on the groups claim in the id token. The Format of the groups claim value should be [{gid: "1", displayName: "group1"}, ...] or ["group1", "group2", ...]') }}
+			{{ t('user_oidc', 'This will create and update the users groups depending on the groups claim in the id token. The Format of the groups claim value should be [{gid: "1", displayName: "group1"}, ...] or ["group1", "group2", ...] or "group1,group2"') }}
 		</p>
 		<p>
 			<label for="group-whitelist-regex">{{ t('user_oidc', 'Group whitelist regex') }}</label>