Attempt to add basic nextcloud addressbook

plugins/nextcloud/NextcloudAddressBook.php

@@ -0,0 +1,93 @@
+<?php
+use Sabre\VObject\Reader;
+use OCA\DAV\CardDAV\CardDavBackend;
+use RainLoop\Providers\AddressBook\Classes\Contact;
+
+
+
+class NextcloudAddressBook implements \RainLoop\Providers\AddressBook\AddressBookInterface
+{
+	private const URI = 'webmail';
+	private $contactsManager;
+
+	function __construct()
+	{
+		$this->contactsManager = \OC::$server->getContactsManager();
+		foreach ($this->contactsManager->getAddressBooks() as $addressbook) {
+			if ($addressbook->getKey() !== self::URI) {
+				$this->contactsManager->unregisterAddressBook($addressbook);
+			}
+		}
+	}
+
+	public function IsSupported() : bool {
+		// Maybe just return true, contacts app is just a frontend
+		//return \OC::$server->getAppManager()->isEnabledForUser('contacts');
+		return true;
+	}
+
+	public function SetEmail(string $sEmail) : bool {
+		return true;
+	}
+
+	public function Sync() : bool {
+		return false;
+	}
+
+	public function Export(string $sType = 'vcf') : bool {
+		return false;
+	}
+
+	public function ContactSave(Contact $oContact) : bool {
+		if ($this->contactsManager->createOrUpdate($oContact->vCard->jsonSerialize(), self::URI)) {
+			return true;
+		}
+		return false;
+	}
+
+	public function DeleteContacts(array $aContactIds) : bool {
+		return false;
+	}
+
+	public function DeleteAllContacts(string $sEmail) : bool {
+		return false;
+	}
+
+	public function GetContacts(int $iOffset = 0, int $iLimit = 20, string $sSearch = '', int &$iResultCount = 0) : array {
+		$options = [
+			'offset' => $iOffset,
+			'limit' => $iLimit
+		];
+		$results = $this->contactsManager->search($sSearch, [], $options);
+		$iResultCount = count($results);
+		return $results;
+
+	}
+
+	public function GetContactByEmail(string $sEmail) : ?Contact {
+		return null;
+	}
+
+	public function GetContactByID($mID, bool $bIsStrID = false) : ?Contact {
+		return null;
+	}
+
+	public function GetSuggestions(string $sSearch, int $iLimit = 20) : array {
+		$options = [
+			'limit' => $iLimit
+		];
+		return $this->contactsManager->search($sSearch, [], $options);
+	}
+
+	/**
+	 * Add/increment email address usage
+	 * Handy for "most used" sorting suggestions in PdoAddressBook
+	 */
+	public function IncFrec(array $aEmails, bool $bCreateAuto = true) : bool {
+		return false;
+	}
+
+	public function Test() : string {
+		return '';
+	}
+}