// Dstl (c) Crown Copyright 2017
package uk.gov.dstl.baleen.annotators.regex;

import java.util.Collections;
import java.util.regex.Matcher;

import org.apache.uima.jcas.JCas;

import com.google.common.collect.ImmutableSet;

import uk.gov.dstl.baleen.annotators.regex.helpers.AbstractRegexAnnotator;
import uk.gov.dstl.baleen.core.pipelines.orderers.AnalysisEngineAction;
import uk.gov.dstl.baleen.types.common.CommsIdentifier;

/**
 * Annotates CommsIdentifiers from social media sites, i.e. in the format @username.
 *
 * @baleen.javadoc
 */
public class SocialMediaUsername extends AbstractRegexAnnotator<CommsIdentifier> {
  // We need the \b in so we don't have emails
  private static final String PATTERN = "\\B@[A-Za-z0-9-_]+\\b";

  /** New instance. */
  public SocialMediaUsername() {
    super(PATTERN, false, 1.0f);
  }

  @Override
  protected CommsIdentifier create(JCas jCas, Matcher matcher) {
    CommsIdentifier ci = new CommsIdentifier(jCas);
    ci.setSubType("username");

    return ci;
  }

  @Override
  public AnalysisEngineAction getAction() {
    return new AnalysisEngineAction(Collections.emptySet(), ImmutableSet.of(CommsIdentifier.class));
  }
}
