add convenience interfaces so entities can provide presentable details

the File entity starts with a display text (used by talk)

Signed-off-by: Arthur Schiwon <blizzz@arthur-schiwon.de>

9 files changed, 259 insertions, 3 deletions

diff --git a/apps/workflowengine/lib/Entity/File.php b/apps/workflowengine/lib/Entity/File.php
index 5192100c2c7..4a01535ce0e 100644
--- a/apps/workflowengine/lib/Entity/File.php
+++ b/apps/workflowengine/lib/Entity/File.php
@@ -32,13 +32,19 @@ use OCP\Files\NotFoundException;
 use OCP\IL10N;
 use OCP\ILogger;
 use OCP\IURLGenerator;
+use OCP\IUserSession;
 use OCP\Share\IManager as ShareManager;
+use OCP\SystemTag\ISystemTag;
+use OCP\SystemTag\ISystemTagManager;
 use OCP\SystemTag\MapperEvent;
+use OCP\WorkflowEngine\EntityContext\IDisplayText;
 use OCP\WorkflowEngine\GenericEntityEvent;
 use OCP\WorkflowEngine\IEntity;
 use OCP\WorkflowEngine\IRuleMatcher;
 
-class File implements IEntity {
+class File implements IEntity, IDisplayText {
+
+	private const EVENT_NAMESPACE = '\OCP\Files::';
 
 	/** @var IL10N */
 	protected $l10n;
@@ -54,21 +60,28 @@ class File implements IEntity {
 	protected $event;
 	/** @var ShareManager */
 	private $shareManager;
+	/** @var IUserSession */
+	private $userSession;
+	/** @var ISystemTagManager */
+	private $tagManager;
 
-	private const EVENT_NAMESPACE = '\OCP\Files::';
 
 	public function __construct(
 		IL10N $l10n,
 		IURLGenerator $urlGenerator,
 		IRootFolder $root,
 		ILogger $logger,
-		ShareManager $shareManager
+		ShareManager $shareManager,
+		IUserSession $userSession,
+		ISystemTagManager $tagManager
 	) {
 		$this->l10n = $l10n;
 		$this->urlGenerator = $urlGenerator;
 		$this->root = $root;
 		$this->logger = $logger;
 		$this->shareManager = $shareManager;
+		$this->userSession = $userSession;
+		$this->tagManager = $tagManager;
 	}
 
 	public function getName(): string {
@@ -146,4 +159,52 @@ class File implements IEntity {
 		}
 		throw new NotFoundException();
 	}
+
+	public function getDisplayText(int $verbosity = 0): string {
+		$user = $this->userSession->getUser();
+		try {
+			$node = $this->getNode();
+		} catch (NotFoundException $e) {
+			return '';
+		}
+
+		$options = [
+			$user ? $user->getDisplayName() : $this->t('Someone'),
+			$node->getName()
+		];
+
+		switch ($this->eventName) {
+			case self::EVENT_NAMESPACE . 'postCreate':
+				return $this->l10n->t('%s created %s', $options);
+			case self::EVENT_NAMESPACE . 'postWrite':
+				return $this->l10n->t('%s modified %s', $options);
+			case self::EVENT_NAMESPACE . 'postDelete':
+				return $this->l10n->t('%s deleted %s', $options);
+			case self::EVENT_NAMESPACE . 'postTouch':
+				return $this->l10n->t('%s accessed %s', $options);
+			case self::EVENT_NAMESPACE . 'postRename':
+				return $this->l10n->t('%s renamed %s', $options);
+			case self::EVENT_NAMESPACE . 'postCopy':
+				return $this->l10n->t('%s copied %s', $options);
+			case MapperEvent::EVENT_ASSIGN:
+				$tagNames = [];
+				if($this->event instanceof MapperEvent) {
+					$tagIDs = $this->event->getTags();
+					$tagObjects = $this->tagManager->getTagsByIds($tagIDs);
+					foreach ($tagObjects as $systemTag) {
+						/** @var ISystemTag $systemTag */
+						if($systemTag->isUserVisible()) {
+							$tagNames[] = $systemTag->getName();
+						}
+					}
+				}
+				$filename = array_pop($options);
+				$tagString = implode(', ', $tagNames);
+				if($tagString === '') {
+					return '';
+				}
+				array_push($options, $tagString, $filename);
+				return $this->l10n->t('%s assigned %s to %s', $options);
+		}
+	}
 }
diff --git a/apps/workflowengine/lib/Service/RuleMatcher.php b/apps/workflowengine/lib/Service/RuleMatcher.php
index 6f670c65c15..16f0e486aaa 100644
--- a/apps/workflowengine/lib/Service/RuleMatcher.php
+++ b/apps/workflowengine/lib/Service/RuleMatcher.php
@@ -94,6 +94,13 @@ class RuleMatcher implements IRuleMatcher {
 		$this->entity = $entity;
 	}
 
+	public function getEntity(): IEntity {
+		if($this->entity === null) {
+			throw new \LogicException('Entity was not set yet');
+		}
+		return $this->entity;
+	}
+
 	public function getFlows(bool $returnFirstMatchingOperationOnly = true): array {
 		if(!$this->operation) {
 			throw new RuntimeException('Operation is not set');
diff --git a/lib/composer/composer/autoload_classmap.php b/lib/composer/composer/autoload_classmap.php
index 900a03a0f35..cd6b4ca1a85 100644
--- a/lib/composer/composer/autoload_classmap.php
+++ b/lib/composer/composer/autoload_classmap.php
@@ -452,6 +452,10 @@ return array(
     'OCP\\User\\Backend\\ISetPasswordBackend' => $baseDir . '/lib/public/User/Backend/ISetPasswordBackend.php',
     'OCP\\User\\Events\\PostLoginEvent' => $baseDir . '/lib/public/User/Events/PostLoginEvent.php',
     'OCP\\Util' => $baseDir . '/lib/public/Util.php',
+    'OCP\\WorkflowEngine\\EntityContext\\IDisplayName' => $baseDir . '/lib/public/WorkflowEngine/EntityContext/IDisplayName.php',
+    'OCP\\WorkflowEngine\\EntityContext\\IDisplayText' => $baseDir . '/lib/public/WorkflowEngine/EntityContext/IDisplayText.php',
+    'OCP\\WorkflowEngine\\EntityContext\\IIcon' => $baseDir . '/lib/public/WorkflowEngine/EntityContext/IIcon.php',
+    'OCP\\WorkflowEngine\\EntityContext\\IUrl' => $baseDir . '/lib/public/WorkflowEngine/EntityContext/IUrl.php',
     'OCP\\WorkflowEngine\\GenericEntityEvent' => $baseDir . '/lib/public/WorkflowEngine/GenericEntityEvent.php',
     'OCP\\WorkflowEngine\\ICheck' => $baseDir . '/lib/public/WorkflowEngine/ICheck.php',
     'OCP\\WorkflowEngine\\IComplexOperation' => $baseDir . '/lib/public/WorkflowEngine/IComplexOperation.php',
diff --git a/lib/composer/composer/autoload_static.php b/lib/composer/composer/autoload_static.php
index 84532fabf5f..7fae2d92c37 100644
--- a/lib/composer/composer/autoload_static.php
+++ b/lib/composer/composer/autoload_static.php
@@ -481,6 +481,10 @@ class ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c
         'OCP\\User\\Backend\\ISetPasswordBackend' => __DIR__ . '/../../..' . '/lib/public/User/Backend/ISetPasswordBackend.php',
         'OCP\\User\\Events\\PostLoginEvent' => __DIR__ . '/../../..' . '/lib/public/User/Events/PostLoginEvent.php',
         'OCP\\Util' => __DIR__ . '/../../..' . '/lib/public/Util.php',
+        'OCP\\WorkflowEngine\\EntityContext\\IDisplayName' => __DIR__ . '/../../..' . '/lib/public/WorkflowEngine/EntityContext/IDisplayName.php',
+        'OCP\\WorkflowEngine\\EntityContext\\IDisplayText' => __DIR__ . '/../../..' . '/lib/public/WorkflowEngine/EntityContext/IDisplayText.php',
+        'OCP\\WorkflowEngine\\EntityContext\\IIcon' => __DIR__ . '/../../..' . '/lib/public/WorkflowEngine/EntityContext/IIcon.php',
+        'OCP\\WorkflowEngine\\EntityContext\\IUrl' => __DIR__ . '/../../..' . '/lib/public/WorkflowEngine/EntityContext/IUrl.php',
         'OCP\\WorkflowEngine\\GenericEntityEvent' => __DIR__ . '/../../..' . '/lib/public/WorkflowEngine/GenericEntityEvent.php',
         'OCP\\WorkflowEngine\\ICheck' => __DIR__ . '/../../..' . '/lib/public/WorkflowEngine/ICheck.php',
         'OCP\\WorkflowEngine\\IComplexOperation' => __DIR__ . '/../../..' . '/lib/public/WorkflowEngine/IComplexOperation.php',
diff --git a/lib/public/WorkflowEngine/EntityContext/IDisplayName.php b/lib/public/WorkflowEngine/EntityContext/IDisplayName.php
new file mode 100644
index 00000000000..eeaf7887d5a
--- /dev/null
+++ b/lib/public/WorkflowEngine/EntityContext/IDisplayName.php
@@ -0,0 +1,41 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019 Arthur Schiwon <blizzz@arthur-schiwon.de>
+ *
+ * @author Arthur Schiwon <blizzz@arthur-schiwon.de>
+ *
+ * @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\WorkflowEngine\EntityContext;
+
+/**
+ * Interface IDisplayName
+ *
+ * @package OCP\WorkflowEngine\EntityContext
+ *
+ * @since 18.0.0
+ */
+interface IDisplayName {
+	/**
+	 * returns the end user facing name of the object related to the entity
+	 *
+	 * @since 18.0.0
+	 */
+	public function getDisplayName(): string;
+}
diff --git a/lib/public/WorkflowEngine/EntityContext/IDisplayText.php b/lib/public/WorkflowEngine/EntityContext/IDisplayText.php
new file mode 100644
index 00000000000..5e74171883a
--- /dev/null
+++ b/lib/public/WorkflowEngine/EntityContext/IDisplayText.php
@@ -0,0 +1,47 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019 Arthur Schiwon <blizzz@arthur-schiwon.de>
+ *
+ * @author Arthur Schiwon <blizzz@arthur-schiwon.de>
+ *
+ * @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\WorkflowEngine\EntityContext;
+
+/**
+ * Interface IDisplayText
+ *
+ * @package OCP\WorkflowEngine\EntityContext
+ *
+ * @since 18.0.0
+ */
+interface IDisplayText {
+
+	/**
+	 * returns translated text used for display to the end user. For instance,
+	 * it can describe the event in a human readable way.
+	 *
+	 * The entity may react to a verbosity level that is provided. With the
+	 * basic level, 0, it would return brief information, and more with higher
+	 * numbers. All information shall be shown at a level of 3.
+	 *
+	 * @since 18.0.0
+	 */
+	public function getDisplayText(int $verbosity = 0): string;
+}
diff --git a/lib/public/WorkflowEngine/EntityContext/IIcon.php b/lib/public/WorkflowEngine/EntityContext/IIcon.php
new file mode 100644
index 00000000000..cde340c9931
--- /dev/null
+++ b/lib/public/WorkflowEngine/EntityContext/IIcon.php
@@ -0,0 +1,42 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019 Arthur Schiwon <blizzz@arthur-schiwon.de>
+ *
+ * @author Arthur Schiwon <blizzz@arthur-schiwon.de>
+ *
+ * @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\WorkflowEngine\EntityContext;
+
+/**
+ * Interface IIcon
+ *
+ * @package OCP\WorkflowEngine\EntityContext
+ *
+ * @since 18.0.0
+ */
+interface IIcon {
+	/**
+	 * returns a URL to an icon that is related to the entity, for instance
+	 * a group icon for groups.
+	 *
+	 * @since 18.0.0
+	 */
+	public function getIconUrl(): string;
+}
diff --git a/lib/public/WorkflowEngine/EntityContext/IUrl.php b/lib/public/WorkflowEngine/EntityContext/IUrl.php
new file mode 100644
index 00000000000..a847dfaad05
--- /dev/null
+++ b/lib/public/WorkflowEngine/EntityContext/IUrl.php
@@ -0,0 +1,41 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019 Arthur Schiwon <blizzz@arthur-schiwon.de>
+ *
+ * @author Arthur Schiwon <blizzz@arthur-schiwon.de>
+ *
+ * @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\WorkflowEngine\EntityContext;
+
+/**
+ * Interface IUrl
+ *
+ * @package OCP\WorkflowEngine\EntityContext
+ *
+ * @since 18.0.0
+ */
+interface IUrl {
+	/**
+	 * returns a URL that is related to the entity, e.g. the link to a share
+	 *
+	 * @since 18.0.0
+	 */
+	public function getUrl(): string;
+}
diff --git a/lib/public/WorkflowEngine/IRuleMatcher.php b/lib/public/WorkflowEngine/IRuleMatcher.php
index fa2359edc09..28abaa56137 100644
--- a/lib/public/WorkflowEngine/IRuleMatcher.php
+++ b/lib/public/WorkflowEngine/IRuleMatcher.php
@@ -67,4 +67,13 @@ interface IRuleMatcher extends IFileCheck {
 	 * @since 18.0.0
 	 */
 	public function setEntity(IEntity $entity): void;
+
+	/**
+	 * returns the entity which might provide more information, depending on
+	 * the interfaces it implements
+	 *
+	 * @return IEntity
+	 * @since 18.0.0
+	 */
+	public function getEntity(): IEntity;
 }