detectSentiment method

Future<DetectSentimentResponse> detectSentiment({ required LanguageCode languageCode, required String text, })

Inspects text and returns an inference of the prevailing sentiment (POSITIVE, NEUTRAL, MIXED, or NEGATIVE).

May throw InvalidRequestException. May throw TextSizeLimitExceededException. May throw UnsupportedLanguageException. May throw InternalServerException.

Parameter languageCode : The language of the input documents. You can specify any of the primary languages supported by Amazon Comprehend. All documents must be in the same language.

Parameter text : A UTF-8 text string. Each string must contain fewer that 5,000 bytes of UTF-8 encoded characters.

Implementation

Future<DetectSentimentResponse> detectSentiment({
  required LanguageCode languageCode,
  required String text,
}) async {
  ArgumentError.checkNotNull(languageCode, 'languageCode');
  ArgumentError.checkNotNull(text, 'text');
  _s.validateStringLength(
    'text',
    text,
    1,
    1152921504606846976,
    isRequired: true,
  );
  final headers = <String, String>{
    'Content-Type': 'application/x-amz-json-1.1',
    'X-Amz-Target': 'Comprehend_20171127.DetectSentiment'
  };
  final jsonResponse = await _protocol.send(
    method: 'POST',
    requestUri: '/',
    exceptionFnMap: _exceptionFns,
    // TODO queryParams
    headers: headers,
    payload: {
      'LanguageCode': languageCode.toValue(),
      'Text': text,
    },
  );

  return DetectSentimentResponse.fromJson(jsonResponse.body);
}