VoteQuery.php
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<?php
namespace FootyRoom\Queries;
use FootyRoom\Queries\Vote\Vote;
use FootyRoom\Support\AutoMapper;
use FootyRoom\Support\MongoClient;
class VoteQuery
{
/**
* @var \FootyRoom\Support\MongoClient
*/
protected $mongo;
/**
* Constructor.
*
* @param \FootyRoom\Support\MongoClient $mongo
*/
public function __construct(MongoClient $mongo)
{
$this->mongo = $mongo->footyroom;
}
/**
* Finds votes by specified tracker that have no user id.
*
* @param string $pollRef
* @param string $tracker
* @param array $fields
*
* @return array
*/
public function findByTrackerOnly($pollRef, $tracker, $fields = []): array
{
$cursor = $this->mongo->votes->find([
'pollRef' => $pollRef,
'tracker' => $tracker,
'userId' => ['$exists' => false],
], ['projection' => $fields]);
return iterator_to_array($cursor);
}
/**
* Finds votes by specified user id.
*
* @param string $pollRef
* @param int $userId
* @param array $fields
*
* @return array
*/
public function findByUserId($pollRef, $userId, $fields = []): array
{
$cursor = $this->mongo->votes->find([
'pollRef' => $pollRef,
'userId' => $userId ?: ['$exists' => false],
], ['projection' => $fields]);
return iterator_to_array($cursor, false);
}
/**
* Returns an aggregate of votes for specified poll.
*
* @param string $pollId
* @param int $limit
*
* @return object
*/
public function aggregate($pollId, $limit = null)
{
$pipeline[] = ['$match' => ['pollRef' => $pollId]];
$pipeline[] = ['$group' => [
'_id' => ['value' => '$value', 'valueRef' => '$valueRef'],
'votes' => ['$sum' => 1],
]];
$pipeline[] = ['$project' => [
'vote' => ['votes' => '$votes', 'value' => '$_id.value', 'valueRef' => '$_id.valueRef'],
]];
$pipeline[] = ['$group' => [
'_id' => $pollId,
'votes' => ['$addToSet' => '$vote'],
'totalVotes' => ['$sum' => '$vote.votes'],
'maxVotes' => ['$max' => '$vote.votes'],
]];
if (isset($limit)) {
$pipeline[] = ['$unwind' => '$votes'];
$pipeline[] = ['$sort' => ['votes.votes' => -1]];
$pipeline[] = ['$limit' => $limit];
$pipeline[] = ['$group' => [
'_id' => $pollId,
'votes' => ['$addToSet' => '$votes'],
'totalVotes' => ['$first' => '$totalVotes'],
'maxVotes' => ['$first' => '$maxVotes'],
]];
}
$pipeline[] = ['$project' => [
'pollRef' => '$_id', 'votes' => 1, 'totalVotes' => 1, 'maxVotes' => 1, '_id' => 0, ],
];
$result = $this->mongo->votes->aggregate($pipeline)->toArray();
if (!isset($result[0])) {
return null;
}
return $result[0];
}
/**
* Finds votes by specified pollRef.
*
* @return \FootyRoom\Queries\Vote\Vote[]
*/
public function findByPollRef(string $pollRef): array
{
$cursor = $this->mongo->votes->aggregate([
['$match' => [
'pollRef' => $pollRef,
'userId' => [
'$exists' => true,
'$ne' => null,
]
]],
['$lookup' => [
'from' => 'users',
'localField' => 'userId',
'foreignField' => 'userId',
'as' => 'user',
]],
['$project' => [
'_id' => 0,
'value' => 1,
'username' => ['$arrayElemAt' => ['$user.username', 0]]
]],
]);
foreach ($cursor as $vote) {
$votes[] = AutoMapper::map($vote, Vote::class);
}
return $votes ?? [];
}
}