[Web][Dovecot][SOGo][DockerApi] Add mailbox groups, shared mailboxes and identity provider sync

data/web/inc/lib/mailcow/Auth/Service/IdpLoginService.php

@@ -0,0 +1,70 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Mailcow\Auth\Service;
+
+use Mailcow\Identity\Model\Settings;
+use Mailcow\Identity\Service\LinkService;
+use Mailcow\MailboxGroup\Service\TemplateService;
+use Throwable;
+
+/**
+ * Steps of an IdP login (Keycloak REST, LDAP bind, OIDC) the legacy login flows call. The link checks fail
+ * closed: an error denies the login.
+ */
+class IdpLoginService
+{
+    public function __construct(private Settings $settings, private LinkService $links, private TemplateService $templates)
+    {
+    }
+
+    /** Template of the first attribute mapping matching one of the IdP attribute values, null if none */
+    public function mappedTemplate(mixed $values): ?string
+    {
+        return $this->settings->mappedTemplate((array)$values);
+    }
+
+    /** Template for the login of an existing mailbox: its effective group template, else the mapped one */
+    public function templateFor(string $username, ?string $mapped): ?string
+    {
+        try {
+            return $this->templates->templateForLogin($username, $mapped);
+        } catch (Throwable $e) {
+            error_log('mailcow: group template lookup failed for ' . $username . ': ' . $e->getMessage());
+            return $mapped;
+        }
+    }
+
+    /** The IdP user may open the mailbox, an unlinked mailbox gets linked */
+    public function verifyLink(string $provider, string $username, string $externalId): bool
+    {
+        try {
+            return $this->links->verify($provider, $username, $externalId);
+        } catch (Throwable $e) {
+            error_log('mailcow: IdP link check failed for ' . $username . ': ' . $e->getMessage());
+            return false;
+        }
+    }
+
+    /** Before a mailbox is created on login: the IdP user must not own another mailbox */
+    public function mayCreate(string $provider, string $username, string $externalId): bool
+    {
+        try {
+            return $this->links->mayCreate($provider, $username, $externalId);
+        } catch (Throwable $e) {
+            error_log('mailcow: IdP link check failed for ' . $username . ': ' . $e->getMessage());
+            return false;
+        }
+    }
+
+    /** Links a mailbox created on login */
+    public function storeLink(string $provider, string $username, string $externalId): void
+    {
+        try {
+            $this->links->link($provider, $username, $externalId);
+        } catch (Throwable $e) {
+            error_log('mailcow: IdP link could not be stored for ' . $username . ': ' . $e->getMessage());
+        }
+    }
+}