refactor: replace custom CRM with Monica fork

app/Http/Controllers/DAV/Backend/CardDAV/AddressBook.php

@@ -0,0 +1,100 @@
+<?php
+
+namespace App\Http\Controllers\DAV\Backend\CardDAV;
+
+use Sabre\CardDAV\AddressBook as BaseAddressBook;
+
+class AddressBook extends BaseAddressBook
+{
+    /**
+     * Returns a list of ACE's for this node.
+     *
+     * Each ACE has the following properties:
+     *   * 'privilege', a string such as {DAV:}read or {DAV:}write. These are
+     *     currently the only supported privileges
+     *   * 'principal', a url to the principal who owns the node
+     *   * 'protected' (optional), indicating that this ACE is not allowed to
+     *      be updated.
+     *
+     * @return array
+     */
+    public function getACL()
+    {
+        return [
+            [
+                'privilege' => '{DAV:}read',
+                'principal' => '{DAV:}owner',
+                'protected' => true,
+            ],
+            [
+                'privilege' => '{DAV:}write-content',
+                'principal' => '{DAV:}owner',
+                'protected' => true,
+            ],
+            [
+                'privilege' => '{DAV:}bind',
+                'principal' => '{DAV:}owner',
+                'protected' => true,
+            ],
+            [
+                'privilege' => '{DAV:}unbind',
+                'principal' => '{DAV:}owner',
+                'protected' => true,
+            ],
+            [
+                'privilege' => '{DAV:}write-properties',
+                'principal' => '{DAV:}owner',
+                'protected' => true,
+            ],
+        ];
+    }
+
+    /**
+     * This method returns the ACL's for card nodes in this address book.
+     * The result of this method automatically gets passed to the
+     * card nodes in this address book.
+     *
+     * @return array
+     */
+    public function getChildACL()
+    {
+        return $this->getACL();
+    }
+
+    /**
+     * Returns the last modification date.
+     *
+     * @return int|null
+     */
+    public function getLastModified(): ?int
+    {
+        $carddavBackend = $this->carddavBackend;
+        if ($carddavBackend instanceof CardDAVBackend) {
+            $date = $carddavBackend->getLastModified(null);
+            if (! is_null($date)) {
+                return (int) $date->timestamp;
+            }
+        }
+
+        return null;
+    }
+
+    /**
+     * This method returns the current sync-token for this collection.
+     * This can be any string.
+     *
+     * If null is returned from this function, the plugin assumes there's no
+     * sync information available.
+     *
+     * @return string|null
+     */
+    public function getSyncToken(): ?string
+    {
+        $carddavBackend = $this->carddavBackend;
+        if ($carddavBackend instanceof CardDAVBackend) {
+            return (string) $carddavBackend->refreshSyncToken(null)->id;
+        }
+
+        return null;
+    }
+}