feat: PDF Template Workflow

appinfo/routes.php

@@ -75,5 +75,8 @@
 
 		['name' => 'Target#getTargets', 'url' => '/api/v1/targets', 'verb' => 'GET'],
 		['name' => 'Target#getPreview', 'url' => '/api/v1/targets/preview', 'verb' => 'GET'],
+
+		['name' => 'TemplateField#extractFields', 'url' => '/api/v1/template/fields/extract/{fileId}', 'verb' => 'GET'],
+		['name' => 'TemplateField#fillFields', 'url' => '/api/v1/template/fields/fill', 'verb' => 'POST'],
 	],
 ];

composer/composer/autoload_classmap.php

@@ -26,6 +26,7 @@
     'OCA\\Richdocuments\\Controller\\OCSController' => $baseDir . '/../lib/Controller/OCSController.php',
     'OCA\\Richdocuments\\Controller\\SettingsController' => $baseDir . '/../lib/Controller/SettingsController.php',
     'OCA\\Richdocuments\\Controller\\TargetController' => $baseDir . '/../lib/Controller/TargetController.php',
+    'OCA\\Richdocuments\\Controller\\TemplateFieldController' => $baseDir . '/../lib/Controller/TemplateFieldController.php',
     'OCA\\Richdocuments\\Controller\\TemplatesController' => $baseDir . '/../lib/Controller/TemplatesController.php',
     'OCA\\Richdocuments\\Controller\\WopiController' => $baseDir . '/../lib/Controller/WopiController.php',
     'OCA\\Richdocuments\\Db\\Asset' => $baseDir . '/../lib/Db/Asset.php',
@@ -42,6 +43,7 @@
     'OCA\\Richdocuments\\Listener\\AddContentSecurityPolicyListener' => $baseDir . '/../lib/Listener/AddContentSecurityPolicyListener.php',
     'OCA\\Richdocuments\\Listener\\AddFeaturePolicyListener' => $baseDir . '/../lib/Listener/AddFeaturePolicyListener.php',
     'OCA\\Richdocuments\\Listener\\BeforeFetchPreviewListener' => $baseDir . '/../lib/Listener/BeforeFetchPreviewListener.php',
+    'OCA\\Richdocuments\\Listener\\BeforeGetTemplatesListener' => $baseDir . '/../lib/Listener/BeforeGetTemplatesListener.php',
     'OCA\\Richdocuments\\Listener\\BeforeTemplateRenderedListener' => $baseDir . '/../lib/Listener/BeforeTemplateRenderedListener.php',
     'OCA\\Richdocuments\\Listener\\FileCreatedFromTemplateListener' => $baseDir . '/../lib/Listener/FileCreatedFromTemplateListener.php',
     'OCA\\Richdocuments\\Listener\\LoadAdditionalListener' => $baseDir . '/../lib/Listener/LoadAdditionalListener.php',
@@ -77,6 +79,7 @@
     'OCA\\Richdocuments\\Service\\InitialStateService' => $baseDir . '/../lib/Service/InitialStateService.php',
     'OCA\\Richdocuments\\Service\\RemoteOptionsService' => $baseDir . '/../lib/Service/RemoteOptionsService.php',
     'OCA\\Richdocuments\\Service\\RemoteService' => $baseDir . '/../lib/Service/RemoteService.php',
+    'OCA\\Richdocuments\\Service\\TemplateFieldService' => $baseDir . '/../lib/Service/TemplateFieldService.php',
     'OCA\\Richdocuments\\Service\\UserScopeService' => $baseDir . '/../lib/Service/UserScopeService.php',
     'OCA\\Richdocuments\\Settings\\Admin' => $baseDir . '/../lib/Settings/Admin.php',
     'OCA\\Richdocuments\\Settings\\Personal' => $baseDir . '/../lib/Settings/Personal.php',

composer/composer/autoload_static.php

@@ -41,6 +41,7 @@ class ComposerStaticInitRichdocuments
         'OCA\\Richdocuments\\Controller\\OCSController' => __DIR__ . '/..' . '/../lib/Controller/OCSController.php',
         'OCA\\Richdocuments\\Controller\\SettingsController' => __DIR__ . '/..' . '/../lib/Controller/SettingsController.php',
         'OCA\\Richdocuments\\Controller\\TargetController' => __DIR__ . '/..' . '/../lib/Controller/TargetController.php',
+        'OCA\\Richdocuments\\Controller\\TemplateFieldController' => __DIR__ . '/..' . '/../lib/Controller/TemplateFieldController.php',
         'OCA\\Richdocuments\\Controller\\TemplatesController' => __DIR__ . '/..' . '/../lib/Controller/TemplatesController.php',
         'OCA\\Richdocuments\\Controller\\WopiController' => __DIR__ . '/..' . '/../lib/Controller/WopiController.php',
         'OCA\\Richdocuments\\Db\\Asset' => __DIR__ . '/..' . '/../lib/Db/Asset.php',
@@ -57,6 +58,7 @@ class ComposerStaticInitRichdocuments
         'OCA\\Richdocuments\\Listener\\AddContentSecurityPolicyListener' => __DIR__ . '/..' . '/../lib/Listener/AddContentSecurityPolicyListener.php',
         'OCA\\Richdocuments\\Listener\\AddFeaturePolicyListener' => __DIR__ . '/..' . '/../lib/Listener/AddFeaturePolicyListener.php',
         'OCA\\Richdocuments\\Listener\\BeforeFetchPreviewListener' => __DIR__ . '/..' . '/../lib/Listener/BeforeFetchPreviewListener.php',
+        'OCA\\Richdocuments\\Listener\\BeforeGetTemplatesListener' => __DIR__ . '/..' . '/../lib/Listener/BeforeGetTemplatesListener.php',
         'OCA\\Richdocuments\\Listener\\BeforeTemplateRenderedListener' => __DIR__ . '/..' . '/../lib/Listener/BeforeTemplateRenderedListener.php',
         'OCA\\Richdocuments\\Listener\\FileCreatedFromTemplateListener' => __DIR__ . '/..' . '/../lib/Listener/FileCreatedFromTemplateListener.php',
         'OCA\\Richdocuments\\Listener\\LoadAdditionalListener' => __DIR__ . '/..' . '/../lib/Listener/LoadAdditionalListener.php',
@@ -92,6 +94,7 @@ class ComposerStaticInitRichdocuments
         'OCA\\Richdocuments\\Service\\InitialStateService' => __DIR__ . '/..' . '/../lib/Service/InitialStateService.php',
         'OCA\\Richdocuments\\Service\\RemoteOptionsService' => __DIR__ . '/..' . '/../lib/Service/RemoteOptionsService.php',
         'OCA\\Richdocuments\\Service\\RemoteService' => __DIR__ . '/..' . '/../lib/Service/RemoteService.php',
+        'OCA\\Richdocuments\\Service\\TemplateFieldService' => __DIR__ . '/..' . '/../lib/Service/TemplateFieldService.php',
         'OCA\\Richdocuments\\Service\\UserScopeService' => __DIR__ . '/..' . '/../lib/Service/UserScopeService.php',
         'OCA\\Richdocuments\\Settings\\Admin' => __DIR__ . '/..' . '/../lib/Settings/Admin.php',
         'OCA\\Richdocuments\\Settings\\Personal' => __DIR__ . '/..' . '/../lib/Settings/Personal.php',

lib/AppInfo/Application.php

@@ -14,6 +14,7 @@
 use OCA\Richdocuments\Listener\AddContentSecurityPolicyListener;
 use OCA\Richdocuments\Listener\AddFeaturePolicyListener;
 use OCA\Richdocuments\Listener\BeforeFetchPreviewListener;
+use OCA\Richdocuments\Listener\BeforeGetTemplatesListener;
 use OCA\Richdocuments\Listener\BeforeTemplateRenderedListener;
 use OCA\Richdocuments\Listener\FileCreatedFromTemplateListener;
 use OCA\Richdocuments\Listener\LoadAdditionalListener;
@@ -38,6 +39,7 @@
 use OCP\AppFramework\Http\Events\BeforeTemplateRenderedEvent;
 use OCP\Collaboration\Reference\RenderReferenceEvent;
 use OCP\Collaboration\Resources\LoadAdditionalScriptsEvent;
+use OCP\Files\Template\BeforeGetTemplatesEvent;
 use OCP\Files\Template\FileCreatedFromTemplateEvent;
 use OCP\Files\Template\RegisterTemplateCreatorEvent;
 use OCP\Preview\BeforePreviewFetchedEvent;
@@ -65,6 +67,7 @@ public function register(IRegistrationContext $context): void {
 		$context->registerEventListener(BeforePreviewFetchedEvent::class, BeforeFetchPreviewListener::class);
 		$context->registerEventListener(RenderReferenceEvent::class, ReferenceListener::class);
 		$context->registerEventListener(BeforeTemplateRenderedEvent::class, BeforeTemplateRenderedListener::class);
+		$context->registerEventListener(BeforeGetTemplatesEvent::class, BeforeGetTemplatesListener::class);
 		$context->registerReferenceProvider(OfficeTargetReferenceProvider::class);
 		$context->registerSensitiveMethods(WopiMapper::class, [
 			'getPathForToken',

lib/Controller/TemplateFieldController.php

@@ -0,0 +1,72 @@
+<?php
+
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\Richdocuments\Controller;
+
+use OCA\Richdocuments\Service\TemplateFieldService;
+use OCA\Richdocuments\TemplateManager;
+use OCP\AppFramework\Http;
+use OCP\AppFramework\Http\Attribute\NoAdminRequired;
+use OCP\AppFramework\Http\DataResponse;
+use OCP\AppFramework\OCSController;
+use OCP\IRequest;
+
+class TemplateFieldController extends OCSController {
+	private TemplateFieldService $templateFieldService;
+	private TemplateManager $templateManager;
+
+	/**
+	 * Template fields controller
+	 *
+	 * @param string $appName,
+	 * @param IRequest $request,
+	 * @param TemplateFieldService $templateFieldService
+	 * @param TemplateManager $templateManager
+	 */
+	public function __construct(
+		string $appName,
+		IRequest $request,
+		TemplateFieldService $templateFieldService,
+		TemplateManager $templateManager
+	) {
+		parent::__construct($appName, $request);
+
+		$this->templateFieldService = $templateFieldService;
+		$this->templateManager = $templateManager;
+	}
+
+	/**
+	 * @param int $fileId
+	 * @return DataResponse
+	 */
+	#[NoAdminRequired]
+	public function extractFields(int $fileId): DataResponse {
+		try {
+			$fields = $this->templateFieldService->extractFields($fileId);
+
+			return new DataResponse($fields, Http::STATUS_OK);
+		} catch (\Exception $e) {
+			return new DataResponse([$e->getMessage()], Http::STATUS_INTERNAL_SERVER_ERROR);
+		}
+	}
+
+	/**
+	 * @param int $fileId
+	 * @param array $fields
+	 * @return DataResponse
+	 */
+	#[NoAdminRequired]
+	public function fillFields(int $fileId, array $fields): DataResponse {
+		try {
+			$this->templateFieldService->fillFields($fileId, $fields);
+
+			return new DataResponse([], Http::STATUS_OK);
+		} catch (\Exception $e) {
+			return new DataResponse([$e->getMessage()], Http::STATUS_INTERNAL_SERVER_ERROR);
+		}
+	}
+}

lib/Listener/BeforeGetTemplatesListener.php

@@ -0,0 +1,34 @@
+<?php
+
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\Richdocuments\Listener;
+
+use OCA\Richdocuments\Service\TemplateFieldService;
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventListener;
+use OCP\Files\Template\BeforeGetTemplatesEvent;
+
+/** @template-implements IEventListener<BeforeGetTemplatesEvent|Event> */
+class BeforeGetTemplatesListener implements IEventListener {
+	public function __construct(
+		private TemplateFieldService $templateFieldService
+	) {
+	}
+
+	public function handle(Event $event): void {
+		if (!$event instanceof BeforeGetTemplatesEvent) {
+			return;
+		}
+
+		foreach($event->getTemplates() as $template) {
+			$templateFileId = $template->jsonSerialize()["fileid"];
+			$fields = $this->templateFieldService->extractFields($templateFileId);
+
+			$template->setFields($fields);
+		}
+	}
+}

lib/Listener/FileCreatedFromTemplateListener.php

@@ -9,6 +9,7 @@
 
 namespace OCA\Richdocuments\Listener;
 
+use OCA\Richdocuments\Service\TemplateFieldService;
 use OCA\Richdocuments\TemplateManager;
 use OCP\EventDispatcher\Event;
 use OCP\EventDispatcher\IEventListener;
@@ -18,11 +19,15 @@
 class FileCreatedFromTemplateListener implements IEventListener {
 	/** @var TemplateManager */
 	private $templateManager;
+	/** @var TemplateFieldService */
+	private $templateFieldService;
 
 	public function __construct(
-		TemplateManager $templateManager
+		TemplateManager $templateManager,
+		TemplateFieldService $templateFieldService
 	) {
 		$this->templateManager = $templateManager;
+		$this->templateFieldService = $templateFieldService;
 	}
 
 	public function handle(Event $event): void {
@@ -50,6 +55,9 @@ public function handle(Event $event): void {
 			$this->templateManager->setTemplateSource($event->getTarget()->getId(), $templateFile->getId());
 		}
 
+		$filledTemplate = $this->templateFieldService->fillFields($templateFile, $event->getTemplateFields());
+		$event->getTarget()->putContent($filledTemplate);
+
 		// Avoid having the mimetype of the source file set
 		$event->getTarget()->getStorage()->getCache()->update($event->getTarget()->getId(), [
 			'mimetype' => $event->getTarget()->getMimeType()

lib/Service/TemplateFieldService.php

@@ -0,0 +1,125 @@
+<?php
+
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\Richdocuments\Service;
+
+use OCA\Richdocuments\AppConfig;
+use OCP\Files\IRootFolder;
+use OCP\Files\Node;
+use OCP\Files\Template\Field;
+use OCP\Files\Template\FieldType;
+use OCP\Http\Client\IClientService;
+use Psr\Log\LoggerInterface;
+
+class TemplateFieldService {
+	public function __construct(
+		private IClientService $clientService,
+		private AppConfig $appConfig,
+		private IRootFolder $rootFolder,
+		private LoggerInterface $logger
+	) {
+	}
+
+	/**
+	 * @param Node|int $file
+	 * @return array|string
+	 */
+	public function extractFields(Node|int $file) {
+		if (is_int($file)) {
+			$file = $this->rootFolder->getFirstNodeById($file);
+		}
+
+		$collaboraUrl = $this->appConfig->getCollaboraUrlInternal();
+		$httpClient = $this->clientService->newClient();
+
+		$form = RemoteOptionsService::getDefaultOptions();
+		$form['query'] = ['limit' => 'content-control'];
+		$form['multipart'] = [[
+			'name' => 'data',
+			'contents' => $file->getStorage()->fopen($file->getInternalPath(), 'r'),
+			'headers' => ['Content-Type' => 'multipart/form-data'],
+		]];
+
+		try {
+			$response = $httpClient->post(
+				$collaboraUrl . "/cool/extract-document-structure",
+				$form
+			);
+
+			$documentStructure = json_decode($response->getBody(), true)['DocStructure'];
+			$fields = [];
+
+			foreach ($documentStructure as $index => $attr) {
+				$fieldType = FieldType::tryFrom($attr['type']) ?? null;
+				if ($fieldType === null) {
+					continue;
+				}
+
+				$fields[] = [
+					new Field(
+						$index,
+						$attr["content"],
+						$fieldType,
+						$attr["alias"],
+						$attr["id"],
+						$attr["tag"]
+					)
+				];
+			}
+
+			return array_merge([], ...$fields);
+		} catch (\Exception $e) {
+			$this->logger->error($e->getMessage());
+			return [];
+		}
+	}
+
+	/**
+	 * @param Node|int $file
+	 * @param array $fields
+	 * @return string|resource
+	 */
+	public function fillFields(Node|int $file, array $fields = []) {
+		if (is_int($file)) {
+			$file = $this->rootFolder->getFirstNodeById($file);
+		}
+
+		$collaboraUrl = $this->appConfig->getCollaboraUrlInternal();
+		$httpClient = $this->clientService->newClient();
+
+		$formData = [
+			'name' => 'data',
+			'contents' => $file->getStorage()->fopen($file->getInternalPath(), 'r'),
+			'headers' => ['Content-Type' => 'multipart/form-data'],
+		];
+
+		$formTransform = [
+			'name' => 'transform',
+			'contents' => '{"Transforms": ' . json_encode($fields) . '}',
+		];
+
+		$formFormat = [
+			'name' => 'format',
+			'contents' => $file->getExtension(),
+		];
+
+		$form = RemoteOptionsService::getDefaultOptions();
+		$form['multipart'] = [$formData, $formTransform, $formFormat];
+
+		try {
+			$response = $httpClient->post(
+				$collaboraUrl . '/cool/transform-document-structure',
+				$form
+			);
+
+			return $response->getBody();
+		} catch (\Exception $e) {
+			$this->logger->error($e->getMessage());
+			throw $e;
+		}
+	}
+}

lib/Template/CollaboraTemplateProvider.php

@@ -18,17 +18,11 @@
 use OCP\IURLGenerator;
 
 class CollaboraTemplateProvider implements ICustomTemplateProvider {
-	/** @var TemplateManager */
-	private $templateManager;
-	/** @var IURLGenerator */
-	private $urlGenerator;
-	/** @var ITemplateManager */
-	private $coreTemplateManager;
-
-	public function __construct(TemplateManager $templateManager, IURLGenerator $urlGenerator, ITemplateManager $coreTemplateManager) {
-		$this->templateManager = $templateManager;
-		$this->urlGenerator = $urlGenerator;
-		$this->coreTemplateManager = $coreTemplateManager;
+	public function __construct(
+		private TemplateManager $templateManager,
+		private IURLGenerator $urlGenerator,
+		private ITemplateManager $coreTemplateManager
+	) {
 	}
 
 	public function getTemplateType(): string {