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<?php |
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/** |
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* This file is part of Chirp package |
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* |
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* Copyright (c) 2015 Alberto Pagliarini |
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* |
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* Licensed under the MIT license |
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* https://github.com/batopa/chirp/blob/master/LICENSE |
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*/ |
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namespace Bato\Chirp; |
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use Bato\Chirp\Utility\Parser; |
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use MongoDB\Client; |
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use Abraham\TwitterOAuth\TwitterOAuth; |
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/** |
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* Chirp Class |
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* |
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* Help to create a cache for Twitter using MongoDB |
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* |
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*/ |
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class Chirp |
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{ |
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/** |
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* The Database object |
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* |
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* @var \MongoDB\Database |
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*/ |
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private $db = null; |
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/** |
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* The instance of TwitterOAuth |
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* |
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* @var \Abraham\TwitterOAuth\TwitterOAuth |
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*/ |
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private $twitter; |
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/** |
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* Constructor |
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* |
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* Passing $twitterAuthConf and/or $mongoConf it tries to setup them |
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* |
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* $twitterAuthConf must contain |
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* - consumer_key |
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* - consumer_secret |
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* - oauth_access_token |
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* - oauth_access_token_secret |
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* |
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* $mongoConf must contain |
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* - db: the name of mongo database to use |
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* |
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* and can contain |
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* - uri |
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* - uriOptions |
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* - driverOptions |
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* |
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* used for MongoDB connection |
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* |
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* @see \MongoDB\Client for $mongoConf |
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* @param array $twitterAuthConf |
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* @param array $mongoDbConf |
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*/ |
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public function __construct(array $twitterAuthConf = array(), array $mongoDbConf = array()) |
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{ |
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if (!empty($twitterAuthConf)) { |
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$this->setupTwitter($twitterAuthConf); |
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} |
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if (!empty($mongoDbConf)) { |
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$this->setupMongoDb($mongoDbConf); |
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} |
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} |
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/** |
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* Setup TwitterOAuth |
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* |
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* $twitterAuthConf must contain |
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* - consumer_key |
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* - consumer_secret |
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* - oauth_access_token |
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* - oauth_access_token_secret |
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* |
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* @param array $twitterAuthConf |
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* @return $this |
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*/ |
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public function setupTwitter(array $twitterAuthConf) |
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{ |
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$twitterAuthConf += [ |
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'consumer_key' => null, |
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'consumer_secret' => null, |
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'oauth_access_token' => null, |
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'oauth_access_token_secret' => null |
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]; |
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$this->twitter = new TwitterOAuth( |
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$twitterAuthConf['consumer_key'], |
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$twitterAuthConf['consumer_secret'], |
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$twitterAuthConf['oauth_access_token'], |
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$twitterAuthConf['oauth_access_token_secret'] |
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); |
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$this->twitter->setDecodeJsonAsArray(true); |
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return $this; |
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} |
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/** |
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* Setup MongoDB connection |
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* |
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* $mongoDbConf must contain |
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* - db: the name of mongo database to use |
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* |
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* and can contain |
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* - uri |
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* - uriOptions |
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* - driverOptions |
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* |
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* @see \MongoDB\Client for $mongoConf |
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* @param array $twitterAuthConf |
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* @param array $mongoDbConf |
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* @return $this |
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*/ |
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public function setupMongoDb(array $mongoDbConf) |
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{ |
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$mongoDbConf += [ |
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'uri' => 'mongodb://localhost:27017', |
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'uriOptions' => [], |
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'driverOptions' => [], |
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'db' => '' |
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]; |
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$client = new Client($mongoDbConf['uri'], $mongoDbConf['uriOptions'], $mongoDbConf['driverOptions']); |
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$this->db = $client->selectDatabase($mongoDbConf['db']); |
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return $this; |
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} |
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/** |
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* Return TwitterOAuth instance |
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* |
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* @return \Abraham\TwitterOAuth\TwitterOAuth |
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*/ |
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public function getTwitter() |
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{ |
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if (empty($this->twitter)) { |
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throw new \RuntimeException( |
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'You have to setup twitter before use it. See \Bato\Chirp\Chirp::setupTwitter()' |
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); |
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} |
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return $this->twitter; |
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} |
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/** |
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* Return the instance of MongoDB database |
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* |
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* @return \MongoDB\Database |
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*/ |
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public function getDb() |
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{ |
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if (empty($this->db)) { |
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throw new \RuntimeException( |
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'You have to setup MongoDB connection before use it. See \Bato\Chirp\Chirp::setupMongoDb()' |
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); |
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} |
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return $this->db; |
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} |
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/** |
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* Starting from twitter endpoint return the related collection |
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* It replaces "/" with "-" after removing trailing "/", for example: |
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* |
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* endpoint "statuses/user_timeline" corresponds to "statuses-user_timeline" collection |
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* |
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* @param string $endpoint [description] |
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* @return \MongoDB\Collection |
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*/ |
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public function getCollection($endpoint) |
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{ |
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$name = Parser::normalize($endpoint); |
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return $this->getDb() |
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->selectCollection($name); |
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} |
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/** |
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* Perform a Twitter request |
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* |
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* @param string $endpoint the endpoint for example 'statuses/user_timeline' |
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* @param array $query an array that specify query string to use with the endpoint |
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* @param string $requestMethod the http request method |
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* @return array |
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*/ |
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public function request($endpoint, $query = [], $requestMethod = 'get') |
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{ |
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$validMethods = ['get', 'post', 'put', 'delete']; |
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$requestMethod = strtolower($requestMethod); |
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if (!in_array($requestMethod, $validMethods)) { |
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throw new \UnexpectedValueException('Unsupported http request method ' . $requestMethod); |
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} |
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$response = $this->getTwitter() |
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->{$requestMethod}($endpoint, $query); |
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return $response; |
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} |
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/** |
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* Read results from a collection (default self::collection) |
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* using $filter to filter results |
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* |
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* If $options['limit'] = 1 return a \MongoDB\BSONDocument object |
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* else return an array or a cursor depending from $options['returnType'] |
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* |
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* @param string $endpoint |
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* @param array $filter |
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* @param array $options |
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* @return object|array |
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*/ |
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public function read($endpoint, array $filter = [], array $options = []) |
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{ |
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$options += ['returnType' => 'array']; |
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$collection = $this->getCollection($endpoint); |
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// delegate to MongoDB\Collection::findOne() |
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if (isset($options['limit']) && $options['limit'] === 1) { |
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return $collection->findOne($filter, $options); |
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} |
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$cursor = $collection->find($filter, $options); |
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return ($options['returnType'] == 'array') ? iterator_to_array($cursor) : $cursor; |
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} |
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/** |
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* Perform twitter request and save results in db. |
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* |
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* Possible $options are: |
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* - query: an array used for compose query string |
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* - grep: an array used for look up. Results matching the grep criteria will be saved. |
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* Example |
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* ``` |
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* [ |
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* 'key_to_look_up' => ['match1', 'match2'], |
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* 'other_key_to_look_up' => ['match3'] |
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* ] |
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* ``` |
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* - require: an array of string of keys required. |
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* Only results with those fields will be saved. |
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* Use point separtated string to go deep in results, for example |
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* `'key1.key2.key3'` checks against`[ 'key1' => ['key2' => ['key3' => 'some_value']]] ` |
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* |
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* @param string $endpoint the twitter endpoint for example 'statuses/user_timeline' |
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* @param array $options |
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* @return array |
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*/ |
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public function write($endpoint, array $options = []) |
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{ |
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$options = $this->prepareWriteOptions($options); |
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$response = $this->request($endpoint, $options['query']); |
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if (empty($response)) { |
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return ['saved' => [], 'read'=> []]; |
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} |
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if (array_key_exists('errors', $response)) { |
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return $response; |
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} |
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$collection = $this->getCollection($endpoint); |
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$tweets = $this->filterToSave($response, $collection, $options); |
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if (!empty($tweets)) { |
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$collection->insertMany($tweets); |
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} |
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return [ |
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'saved' => $tweets, |
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'read'=> $response |
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]; |
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} |
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/** |
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* Check and return $options to be used in self::write() |
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* |
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* @param string $endpoint the twitter endpoint for example 'statuses/user_timeline' |
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* @param array $options |
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* @return array |
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*/ |
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private function prepareWriteOptions($options) |
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{ |
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$options += [ |
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'query' => [], |
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'grep' => [], |
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'require' => [] |
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]; |
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foreach (['query', 'grep', 'require'] as $test) { |
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if (!is_array($options[$test])) { |
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throw new \UnexpectedValueException('"' . $test . '" option must be an array'); |
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} |
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} |
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$options['query'] = array_filter($options['query']); |
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return $options; |
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} |
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/** |
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* Given an array of tweets and a collection |
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* return the tweets that missing from the collection |
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* |
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* @see self::write() for $options |
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* @param array $tweets |
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* @param \MongoDB\Collection $collection |
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* @param array $options |
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* @return array |
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*/ |
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private function filterToSave(array $tweets, \MongoDB\Collection $collection, array $options) |
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{ |
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$toSave = []; |
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foreach ($tweets as $key => $tweet) { |
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if (!Parser::match($tweet, $options)) { |
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continue; |
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} |
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$countTweets = $collection->count(['id_str' => $tweet['id_str']]); |
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if ($countTweets === 0) { |
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$toSave[] = $tweet; |
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} |
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} |
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return $toSave; |
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} |
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} |
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|
This check looks for PHPDoc comments describing methods or function parameters that do not exist on the corresponding method or function.
Consider the following example. The parameter
$italyis not defined by the methodfinale(...).The most likely cause is that the parameter was removed, but the annotation was not.