feat: create new card from smart picker

Signed-off-by: Luka Trovic <luka@nextcloud.com>

lib/Reference/CreateCardReferenceProvider.php

@@ -0,0 +1,78 @@
+<?php
+
+namespace OCA\Deck\Reference;
+
+use OCA\Deck\AppInfo\Application;
+use OCP\Collaboration\Reference\ADiscoverableReferenceProvider;
+use OCP\Collaboration\Reference\IReference;
+use OCP\IL10N;
+
+use OCP\IURLGenerator;
+
+class CreateCardReferenceProvider extends ADiscoverableReferenceProvider {
+
+	public function __construct(
+		private IL10N $l10n,
+		private IURLGenerator $urlGenerator,
+		private ?string $userId) {
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function getId(): string {
+		return 'create-new-deck-card';
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function getTitle(): string {
+		return $this->l10n->t('Create a new deck card');
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function getOrder(): int {
+		return 10;
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function getIconUrl(): string {
+		return $this->urlGenerator->getAbsoluteURL(
+			$this->urlGenerator->imagePath(Application::APP_ID, 'deck-dark.svg')
+		);
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function matchReference(string $referenceText): bool {
+		return false;
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function resolveReference(string $referenceText): ?IReference {
+		return null;
+	}
+
+	/**
+	 * @inheritDoc
+	 */
+	public function getCachePrefix(string $referenceId): string {
+		return $this->userId ?? '';
+	}
+
+	/**
+	 * We don't use the userId here but rather a reference unique id
+	 * @inheritDoc
+	 */
+	public function getCacheKey(string $referenceId): ?string {
+		return $referenceId;
+	}
+}