mirror of
https://github.com/Poniverse/Pony.fm.git
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93 lines
3 KiB
PHP
93 lines
3 KiB
PHP
<?php
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/**
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* Pony.fm - A community for pony fan music.
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* Copyright (C) 2015 Peter Deltchev
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero 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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* This program 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 Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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namespace Poniverse\Ponyfm\Commands;
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use Poniverse\Ponyfm\Models\Favourite;
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use Poniverse\Ponyfm\Models\ResourceUser;
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use Illuminate\Support\Facades\Auth;
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use Illuminate\Support\Facades\DB;
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class ToggleFavouriteCommand extends CommandBase
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{
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private $_resourceType;
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private $_resourceId;
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function __construct($resourceType, $resourceId)
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{
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$this->_resourceId = $resourceId;
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$this->_resourceType = $resourceType;
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}
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/**
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* @return bool
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*/
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public function authorize()
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{
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$user = Auth::user();
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return $user != null;
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}
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/**
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* @throws \Exception
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* @return CommandResponse
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*/
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public function execute()
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{
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$typeId = $this->_resourceType . '_id';
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$existing = Favourite::where($typeId, '=', $this->_resourceId)->whereUserId(Auth::user()->id)->first();
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$isFavourited = false;
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if ($existing) {
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$existing->delete();
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} else {
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$fav = new Favourite();
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$fav->$typeId = $this->_resourceId;
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$fav->user_id = Auth::user()->id;
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$fav->created_at = time();
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$fav->save();
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$isFavourited = true;
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}
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$resourceUser = ResourceUser::get(Auth::user()->id, $this->_resourceType, $this->_resourceId);
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$resourceUser->is_favourited = $isFavourited;
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$resourceUser->save();
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$resourceTable = $this->_resourceType . 's';
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// We do this to prevent a race condition. Sure I could simply increment the count columns and re-save back to the db
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// but that would require an additional SELECT and the operation would be non-atomic. If two log items are created
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// for the same resource at the same time, the cached values will still be correct with this method.
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DB::table($resourceTable)->whereId($this->_resourceId)->update([
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'favourite_count' =>
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DB::raw('(
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SELECT
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COUNT(id)
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FROM
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favourites
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WHERE ' .
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$typeId . ' = ' . $this->_resourceId . ')')
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]);
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return CommandResponse::succeed(['is_favourited' => $isFavourited]);
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}
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}
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