owncloud/core

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apps/comments/lib/Activity/Extension.php

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<?php
/**
 * @author Joas Schilling <coding@schilljs.com>
 * @author Thomas Müller <thomas.mueller@tmit.eu>
 *
 * @copyright Copyright (c) 2018, ownCloud GmbH
 * @license AGPL-3.0
 *
 * This code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * 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, version 3,
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 *
 */

namespace OCA\Comments\Activity;

use OCP\Activity\IExtension;
use OCP\Activity\IManager;
use OCP\Comments\ICommentsManager;
use OCP\Comments\NotFoundException;
use OCP\IL10N;
use OCP\IURLGenerator;
use OCP\L10N\IFactory;

/**
 * Class Extension
 *
 * @package OCA\Comments\Activity
 */
class Extension implements IExtension {
    public const APP_NAME = 'comments';

    public const ADD_COMMENT_SUBJECT = 'add_comment_subject';
    public const ADD_COMMENT_MESSAGE = 'add_comment_message';

    /** @var IFactory */
    protected $languageFactory;

    /** @var IManager */
    protected $activityManager;

    /** @var ICommentsManager */
    protected $commentsManager;

    /** @var IURLGenerator */
    protected $URLGenerator;

    /**
     * @param IFactory $languageFactory
     * @param IManager $activityManager
     * @param ICommentsManager $commentsManager
     * @param IURLGenerator $URLGenerator
     */
    public function __construct(IFactory $languageFactory, IManager $activityManager, ICommentsManager $commentsManager, IURLGenerator $URLGenerator) {
        $this->languageFactory = $languageFactory;
        $this->activityManager = $activityManager;
        $this->commentsManager = $commentsManager;
        $this->URLGenerator = $URLGenerator;
    }

    protected function getL10N($languageCode = null) {
        return $this->languageFactory->get(self::APP_NAME, $languageCode);
    }

    /**
     * The extension can return an array of additional notification types.
     * If no additional types are to be added false is to be returned
     *
     * @param string $languageCode
     * @return array|false
     */
    public function getNotificationTypes($languageCode) {
        $l = $this->getL10N($languageCode);

        return [
            self::APP_NAME => [
                'desc' => (string) $l->t('<strong>Comments</strong> for files <em>(always listed in stream)</em>'),
                'methods' => [self::METHOD_MAIL], // self::METHOD_STREAM is forced true by the default value
            ],
        ];
    }

    /**
     * For a given method additional types to be displayed in the settings can be returned.
     * In case no additional types are to be added false is to be returned.
     *
     * @param string $method
     * @return array|false
     */
    public function getDefaultTypes($method) {
        return $method === self::METHOD_STREAM ? [self::APP_NAME] : false;
    }

    /**
     * A string naming the css class for the icon to be used can be returned.
     * If no icon is known for the given type false is to be returned.
     *
     * @param string $type
     * @return string|false
     */
    public function getTypeIcon($type) {
        switch ($type) {
            case self::APP_NAME:
                return 'icon-comment';
        }

        return false;
    }

    /**
     * The extension can translate a given message to the requested languages.
     * If no translation is available false is to be returned.
     *
     * @param string $app
     * @param string $text
     * @param array $params
     * @param boolean $stripPath
     * @param boolean $highlightParams
     * @param string $languageCode
     * @return string|false
     */
    public function translate($app, $text, $params, $stripPath, $highlightParams, $languageCode) {
        if ($app !== self::APP_NAME) {
            return false;
        }

        $l = $this->getL10N($languageCode);

        if ($this->activityManager->isFormattingFilteredObject()) {
            $translation = $this->translateShort($text, $l, $params);
            if ($translation !== false) {
                return $translation;
            }
        }

        return $this->translateLong($text, $l, $params);
    }

    /**
     * @param string $text
     * @param IL10N $l
     * @param array $params
     * @return bool|string
     */
    protected function translateShort($text, IL10N $l, array $params) {
        switch ($text) {
            case self::ADD_COMMENT_SUBJECT:
                if ($this->authorIsCurrentUser($params[0])) {
                    return (string) $l->t('You commented');
                }
                return (string) $l->t('%1$s commented', $params);
            case self::ADD_COMMENT_MESSAGE:
                return $this->convertParameterToComment($params[0]);
        }

        return false;
    }

    /**
     * @param string $text
     * @param IL10N $l
     * @param array $params
     * @return bool|string
     */
    protected function translateLong($text, IL10N $l, array $params) {
        switch ($text) {
            case self::ADD_COMMENT_SUBJECT:
                if ($this->authorIsCurrentUser($params[0])) {
                    return (string) $l->t('You commented on %2$s', $params);
                }
                return (string) $l->t('%1$s commented on %2$s', $params);
            case self::ADD_COMMENT_MESSAGE:
                return $this->convertParameterToComment($params[0]);
        }

        return false;
    }

    /**
     * Check if the author is the current user
     *
     * @param string $user Parameter e.g. `<user display-name="admin">admin</user>`
     * @return bool
     */
    protected function authorIsCurrentUser($user) {
        try {
            return \strip_tags($user) === $this->activityManager->getCurrentUserId();
        } catch (\UnexpectedValueException $e) {
            return false;
        }
    }

    /**
     * The extension can define the type of parameters for translation
     *
     * Currently known types are:
     * * file        => will strip away the path of the file and add a tooltip with it
     * * username    => will add the avatar of the user
     *
     * @param string $app
     * @param string $text
     * @return array|false
     */
    public function getSpecialParameterList($app, $text) {
        if ($app === self::APP_NAME) {
            switch ($text) {
                case self::ADD_COMMENT_SUBJECT:
                    return [
                        0 => 'username',
                        1 => 'file',
                    ];
            }
        }

        return false;
    }

    /**
     * The extension can define the parameter grouping by returning the index as integer.
     * In case no grouping is required false is to be returned.
     *
     * @param array $activity
     * @return integer|false
     */
    public function getGroupParameter($activity) {
        return false;
    }

    /**
     * The extension can define additional navigation entries. The array returned has to contain two keys 'top'
     * and 'apps' which hold arrays with the relevant entries.
     * If no further entries are to be added false is no be returned.
     *
     * @return array|false
     */
    public function getNavigation() {
        $l = $this->getL10N();
        return [
            'apps' => [],
            'top' => [
                self::APP_NAME => [
                    'id' => self::APP_NAME,
                    'name' => (string) $l->t('Comments'),
                    'url' => $this->URLGenerator->linkToRoute('activity.Activities.showList', ['filter' => self::APP_NAME]),
                ],
            ],
        ];
    }

    /**
     * The extension can check if a custom filter (given by a query string like filter=abc) is valid or not.
     *
     * @param string $filterValue
     * @return boolean
     */
    public function isFilterValid($filterValue) {
        return $filterValue === self::APP_NAME;
    }

    /**
     * The extension can filter the types based on the filter if required.
     * In case no filter is to be applied false is to be returned unchanged.
     *
     * @param array $types
     * @param string $filter
     * @return array|false
     */
    public function filterNotificationTypes($types, $filter) {
        if ($filter === self::APP_NAME) {
            return [self::APP_NAME];
        }
        if (\in_array($filter, ['all', 'by', 'self', 'filter'])) {
            $types[] = self::APP_NAME;
            return $types;
        }
        return false;
    }

    /**
     * For a given filter the extension can specify the sql query conditions including parameters for that query.
     * In case the extension does not know the filter false is to be returned.
     * The query condition and the parameters are to be returned as array with two elements.
     * E.g. return array('`app` = ? and `message` like ?', array('mail', 'ownCloud%'));
     *
     * @param string $filter
     * @return array|false
     */
    public function getQueryForFilter($filter) {
        return false;
    }

    /**
     * @param string $parameter
     * @return string
     */
    protected function convertParameterToComment($parameter) {
        if (\preg_match('/^\<parameter\>(\d*)\<\/parameter\>$/', $parameter, $matches)) {
            try {
                $comment = $this->commentsManager->get((int) $matches[1]);
                $message = $comment->getMessage();
                $message = \str_replace("\n", '<br />', \str_replace(['<', '>'], ['&lt;', '&gt;'], $message));
                return $message;
            } catch (NotFoundException $e) {
                return '';
            }
        }

        return '';
    }
}