extend the reference API for the new link picker

- add 2 interfaces for discoverable and searchable reference providers
- new OCS route to get info on discoverable/searchable reference providers
- new abstract ADiscoverableReferenceProvider that only implements jsonSerialize
- listen to RenderReferenceEvent to inject provider list with initial state

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

4 files changed, 151 insertions, 0 deletions

diff --git a/lib/public/Collaboration/Reference/ADiscoverableReferenceProvider.php b/lib/public/Collaboration/Reference/ADiscoverableReferenceProvider.php
new file mode 100644
index 00000000000..56b97957a02
--- /dev/null
+++ b/lib/public/Collaboration/Reference/ADiscoverableReferenceProvider.php
@@ -0,0 +1,47 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2022 Julien Veyssier <eneiluj@posteo.net>
+ *
+ * @author Julien Veyssier <eneiluj@posteo.net>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace OCP\Collaboration\Reference;
+
+/**
+ * @since 26.0.0
+ */
+abstract class ADiscoverableReferenceProvider implements IDiscoverableReferenceProvider {
+
+	/**
+	 * @inheritDoc
+	 */
+	public function jsonSerialize(): array {
+		$json = [
+			'id' => $this->getId(),
+			'title' => $this->getTitle(),
+			'icon_url' => $this->getIconUrl(),
+			'order' => $this->getOrder(),
+		];
+		if ($this instanceof ISearchableReferenceProvider) {
+			$json['search_providers_ids'] = $this->getSupportedSearchProviderIds();
+		}
+		return $json;
+	}
+}
diff --git a/lib/public/Collaboration/Reference/IDiscoverableReferenceProvider.php b/lib/public/Collaboration/Reference/IDiscoverableReferenceProvider.php
new file mode 100644
index 00000000000..847e03c602e
--- /dev/null
+++ b/lib/public/Collaboration/Reference/IDiscoverableReferenceProvider.php
@@ -0,0 +1,60 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2022 Julien Veyssier <eneiluj@posteo.net>
+ *
+ * @author Julien Veyssier <eneiluj@posteo.net>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace OCP\Collaboration\Reference;
+
+/**
+ * @since 26.0.0
+ */
+interface IDiscoverableReferenceProvider extends IReferenceProvider {
+	/**
+	 * @return string Unique id that identifies the reference provider
+	 * @since 26.0.0
+	 */
+	public function getId(): string;
+
+	/**
+	 * @return string User facing title of the widget
+	 * @since 26.0.0
+	 */
+	public function getTitle(): string;
+
+	/**
+	 * @return int Initial order for reference provider sorting
+	 * @since 26.0.0
+	 */
+	public function getOrder(): int;
+
+	/**
+	 * @return string url to an icon that can be displayed next to the reference provider title
+	 * @since 26.0.0
+	 */
+	public function getIconUrl(): string;
+
+	/**
+	 * @return array representation of the provider
+	 * @since 26.0.0
+	 */
+	public function jsonSerialize(): array;
+}
diff --git a/lib/public/Collaboration/Reference/IReferenceManager.php b/lib/public/Collaboration/Reference/IReferenceManager.php
index 487e243c7ed..31977be4d74 100644
--- a/lib/public/Collaboration/Reference/IReferenceManager.php
+++ b/lib/public/Collaboration/Reference/IReferenceManager.php
@@ -67,4 +67,12 @@ interface IReferenceManager {
 	 * @since 25.0.0
 	 */
 	public function invalidateCache(string $cachePrefix, ?string $cacheKey = null): void;
+
+	/**
+	 * Get list of providers that implement IDiscoverableReferenceProvider
+	 *
+	 * @return IDiscoverableReferenceProvider[]
+	 * @since 26.0.0
+	 */
+	public function getDiscoverableProviders(): array;
 }
diff --git a/lib/public/Collaboration/Reference/ISearchableReferenceProvider.php b/lib/public/Collaboration/Reference/ISearchableReferenceProvider.php
new file mode 100644
index 00000000000..b863de468a8
--- /dev/null
+++ b/lib/public/Collaboration/Reference/ISearchableReferenceProvider.php
@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2022 Julien Veyssier <eneiluj@posteo.net>
+ *
+ * @author Julien Veyssier <eneiluj@posteo.net>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace OCP\Collaboration\Reference;
+
+/**
+ * @since 26.0.0
+ */
+interface ISearchableReferenceProvider extends IDiscoverableReferenceProvider {
+	/**
+	 * @return string[] list of search provider IDs that can be used by the vue-richtext picker
+	 * @since 26.0.0
+	 */
+	public function getSupportedSearchProviderIds(): array;
+}