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<?php |
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/** |
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* Donut Social Network - Yet another experimental social network. |
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* Copyright (C) 2016-2017, Dejan Angelov <[email protected]> |
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* |
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* This file is part of Donut Social Network. |
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* |
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* Donut Social Network is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* Donut Social Network is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with Donut Social Network. If not, see <http://www.gnu.org/licenses/>. |
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* |
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* @package Donut Social Network |
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* @copyright Copyright (C) 2016-2017, Dejan Angelov <[email protected]> |
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* @license https://github.com/angelov/donut/blob/master/LICENSE |
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* @author Dejan Angelov <[email protected]> |
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*/ |
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namespace Angelov\Donut\Friendships\FriendshipsRecorder; |
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use GraphAware\Neo4j\Client\Client; |
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use Angelov\Donut\Friendships\Friendship; |
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use Angelov\Donut\Users\User; |
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class Neo4jFriendshipsRecorder implements FriendshipsRecorderInterface |
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{ |
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private $client; |
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public function __construct(Client $client) |
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{ |
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$this->client = $client; |
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} |
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public function recordCreated(Friendship $friendship): void |
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{ |
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// @todo handle neo4j exceptions |
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$user = $friendship->getUser(); |
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$friend = $friendship->getFriend(); |
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$this->createUserNode($user); |
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$this->createUserNode($friend); |
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$this->createFriendshipRelationships($user, $friend); |
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} |
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private function createUserNode(User $user) : void |
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{ |
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$query = 'MERGE (n:User {id: {id}, name: {name}})'; |
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$this->client->run($query, ['id' => $user->getId(), 'name' => $user->getName()]); |
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} |
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private function createFriendshipRelationships(User $first, User $second) : void |
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{ |
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$query = ' |
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MATCH |
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(first:User {id:{first}}), |
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(second:User {id:{second}}) |
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CREATE |
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(first)-[:FRIEND]->(second) |
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'; |
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$this->client->run($query, [ |
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'first' => $first->getId(), |
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'second' => $second->getId() |
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]); |
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} |
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public function recordDeleted(Friendship $friendship): void |
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{ |
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// @todo handle exceptions |
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$first = $friendship->getUser(); |
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$second = $friendship->getFriend(); |
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$query = ' |
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MATCH |
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(u:User {id: {first}}), |
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(r:User {id: {second}}), |
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(u)-[f:FRIEND]-(r) |
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DELETE f |
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'; |
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$this->client->run($query, [ |
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'first' => $first->getId(), |
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'second' => $second->getId() |
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]); |
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} |
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} |
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angelov /
donut
