'http', 'contentType' => 'TEXT/HTML', 'outputFormat' => 'XML/RDF', 'externalID' => '', 'submitter' => 'Drupal', 'calculateRelevanceScore' => 'true', 'enableMetadataType' => 'SocialTags', 'allowSearch' => 'false', 'allowDistribution' => 'false', 'caller' => 'Drupal', ); public $parameters; public $rdf; public $triples = array(); public $flatTriples = array(); public $keywords = array(); /** * Constructs an instance of the Calais facade. * * Valid parameters are specified in the options array as key/value pairs with the * parameter name being the key and the parameter setting being the value * e.g. array('allowSearch' => 'false') * * @param options An array of parameter options for the Calais Web Service. * These will override the defaults. * * @see http://opencalais.com/APIcalls#inputparameters */ function __construct($options = array()) { $this->defaults['externalID'] = time(); $this->defaults['allowSearch'] = variable_get('calais_api_allow_searching', TRUE) ? 'true' : 'false'; $this->defaults['allowDistribution'] = variable_get('calais_api_allow_distribution', TRUE) ? 'true' : 'false'; $this->defaults['host'] = variable_get('calais_api_server', 'api1.opencalais.com'); $this->parameters = array_merge($this->defaults, $options); } /** * Analyze the provided content, passing it to Calais in XML format for more accurate data processing. * * @param $title The title of the content to process * @param $body The body ofd the content to process * @param $date The date of the content, if left blank/null analysis will use "today" * @return The processed Calais results. The raw RDF result is contained in the $this->rdf field. */ public function analyzeXML($title, $body, $date) { $content = $this->build_xml_content($title, $body, $date); $this->parameters['contentType'] = 'TEXT/XML'; return $this->analyze($content); } /** * Analyze the content via Calais. * * @param $content The content to ship off to Calais for analysis * @return The processed Calais results. The raw RDF result is contained in the $this->rdf field. */ public function analyze($content) { $headers = array('Content-Type' => 'application/x-www-form-urlencoded'); $data = array( 'licenseID' => variable_get('calais_api_key', NULL), 'content' => $content, 'paramsXML' => $this->build_xml_params(), ); $data_enc = http_build_query($data, '', '&'); $uri = $this->parameters['protocol'] . '://' . $this->parameters['host'] . self::PATH; $ret = drupal_http_request($uri, $headers, 'POST', $data_enc); if (isset($ret->error)) { self::log_calais_error($ret); return array(); } $this->rdf = $ret->data; $this->processor = new CalaisRdfProcessor(); $this->keywords = $this->processor->parse_rdf($this->rdf); $this->triples = $this->processor->triples; $this->flatTriples = $this->processor->flatTriples; return $this->keywords; } private static function log_calais_error($ret) { $msg = t('Calais processing error: @msg', array('@msg' => $ret->data)); drupal_set_message($msg, 'error'); watchdog('calais', 'Calais processing error: (@code - @error) @msg', array('@code' => $ret->code, '@error' => $ret->error, '@msg' => $ret->data), WATCHDOG_ERROR); } /** * Build the XML Parameters required by the Calais Web-Service * * @return XML document of Calais parameters. */ protected function build_xml_params() { $attributes = $this->parameters; $ret = << c:calculateRelevanceScore="$attributes[calculateRelevanceScore]"> $attributes[caller] EOD; return $ret; } /** * Build the XML document request format expected by Calais * * @return an xml string to be submitted to Calais * @see http://opencalais.com/APIcalls#inputcontentformat */ protected function build_xml_content($title, $body, $date) { $req = ""; $req .= ""; $req .= "$date"; $req .= ""; $req .= ""; return $req; } }