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<?php |
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declare(strict_types=1); |
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namespace JustSteveKing\Graph\Connection\Adapters\Neo4j\Http; |
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use RuntimeException; |
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use GuzzleHttp\Client; |
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use JustSteveKing\Graph\Connection\Adapters\AdapterInterface; |
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class HttpAdapter implements AdapterInterface |
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{ |
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/** |
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* @var string |
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*/ |
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protected string $database = ''; |
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/** |
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* @var Pipeline |
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*/ |
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protected Pipeline $pipeline; |
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/** |
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* @var Client |
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*/ |
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protected Client $client; |
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/** |
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* HttpAdapter constructor. |
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* @param string $connectionString |
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* @return void |
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*/ |
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protected function __construct(string $connectionString, ?string $database) |
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{ |
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$uri = parse_url($connectionString); |
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if (! is_null($database)) { |
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$this->database = $database; |
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} |
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$this->pipeline = new Pipeline(); |
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$this->client = new Client([ |
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'base_uri' => $uri['scheme'] . '://' . $uri['host'] . ':' . $uri['port'], |
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'timeout' => 3, |
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'headers' => [ |
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'Accept' => 'application/json;charset=UTF-8', |
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'Authorization' => 'Basic ' . base64_encode($uri['user'] . ':' . $uri['pass']), |
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'Content-Type' => 'application/json' |
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] |
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]); |
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} |
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/** |
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* Returns the alias name of the adapter |
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* |
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* @return string |
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*/ |
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public static function getName(): string |
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{ |
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return 'neo-http'; |
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} |
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/** |
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* Builds the adapter using a connection string |
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* |
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* @param string $connectionString |
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* @param string|null $database |
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* @return static |
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*/ |
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public static function build(string $connectionString, ?string $database): self |
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{ |
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$uri = parse_url($connectionString); |
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if (! preg_match('/http(s?)/i', $uri['scheme'])) { |
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$scheme = $uri['scheme']; |
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throw new \RuntimeException("The HttpAdapter only accepts http or https schemes, you sent {$scheme}"); |
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} |
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return new self($connectionString, $database); |
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} |
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/** |
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* Send the request to the neo4j API |
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* |
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* @throws RuntimeException |
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* |
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* @return mixed |
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*/ |
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public function send() |
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{ |
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if (empty($this->database)) { |
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throw new RuntimeException( |
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"no database has been selected to perform your queries on, please use the 'on(string \$database\)' method first" |
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); |
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} |
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$request = $this->prepareStatements(); |
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try { |
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$response = $this->client->request( |
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'POST', |
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"/db/$this->database/tx", |
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[ |
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'json' => json_decode($request) |
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] |
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); |
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} catch (\Exception $e) { |
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throw new \RuntimeException($e->getMessage()); |
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} |
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$this->database = ''; |
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$this->pipeline = new Pipeline(); |
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return json_decode((string) $response->getBody(), true); |
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} |
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/** |
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* Set the database you want to query on |
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* |
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* @param string $database |
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* |
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* @return self |
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*/ |
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public function on(string $database): self |
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{ |
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$this->database = $database; |
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return $this; |
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} |
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/** |
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* Push a query onto the transaction pipeline |
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* |
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* @param string $query |
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* |
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* @return self |
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*/ |
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public function query(string $query): self |
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{ |
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$this->pipeline->push($query); |
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return $this; |
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} |
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/** |
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* Prepare statements to be sent |
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* |
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* @return string |
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*/ |
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public function prepareStatements(): string |
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{ |
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$statements = []; |
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foreach ($this->pipeline->queries() as $statement) { |
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$statement = [ |
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'statement' => $statement, |
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'resultDataContents' => ['REST', 'GRAPH'], |
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'includeStats' => true, |
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]; |
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$statements[] = $statement; |
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} |
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return json_encode([ |
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'statements' => $statements |
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]); |
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} |
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/** |
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* A helper method for seeing if a database is selected |
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* |
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* @return string |
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*/ |
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public function getDatabase(): string |
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{ |
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return $this->database; |
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} |
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/** |
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* A helper method to work with the current Pipeline |
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* |
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* @return Pipeline |
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*/ |
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public function getPipeline(): Pipeline |
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{ |
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return $this->pipeline; |
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} |
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/** |
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* A helper method to work with the Guzzle Client for any reason. |
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* |
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* @return Client |
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*/ |
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public function getClient(): Client |
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{ |
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return $this->client; |
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} |
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/** |
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* A helper method mainly for testing purposes |
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* |
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* @return self |
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*/ |
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public function setClient(Client $client): self |
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{ |
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$this->client = $client; |
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return $this; |
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} |
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} |
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