/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package at.illecker.storm.examples.util;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class StringUtils {
  private static final Logger LOG = LoggerFactory.getLogger(StringUtils.class);

  public static boolean isURL(String value) {
    return RegexUtils.WEB_URL.matcher(value).matches();
  }

  public static boolean isEmail(String value) {
    return RegexUtils.EMAIL_ADDRESS.matcher(value).matches();
  }

  public static boolean isHashTag(String value) {
    return RegexUtils.HASHTAG.matcher(value).matches();
  }

  public static boolean isUser(String value) {
    return RegexUtils.USER.matcher(value).matches();
  }

  public static boolean isRetweet(String value) {
    return RegexUtils.RETWEET.matcher(value).matches();
  }

  public static boolean isPunctuation(char c) {
    return c == ',' || c == '.' || c == '!' || c == '?' || c == ':' || c == ';';
  }

  public static boolean isSpecialChar(char c) {
    return c == '-' || c == '_' || c == '&' || c == '|' || c == '/'
        || c == '\\' || c == '"' || c == '\'' || c == '`' || c == '´'
        || c == '<' || c == '>';
  }

  public static String trimPunctuation(String value) {
    int valueLen = value.length();

    // count starting punctuations
    int startingPunctuations = 0;
    for (int i = 0; i < valueLen; i++) {
      if (isPunctuation(value.charAt(i)) || isSpecialChar((value.charAt(i)))) {
        startingPunctuations++;
      } else {
        break;
      }
    }

    // count ending punctuations
    int endingPunctuations = 0;
    for (int i = valueLen - 1; i >= 0; i--) {
      if (isPunctuation(value.charAt(i)) || isSpecialChar((value.charAt(i)))) {
        endingPunctuations++;
      } else {
        break;
      }
    }

    // case 1) no characters were punctuation
    if ((startingPunctuations == 0) && (endingPunctuations == 0)) {
      return value;
    }

    // case 2) all characters were punctuation
    if ((startingPunctuations == valueLen) && (endingPunctuations == valueLen)) {
      return "";
    }

    // case 3) substring
    LOG.info("substring token '" + value + "'");

    // TODO try and catch StringIndexOutOfBoundsException
    // e.g., >:-[
    return value.substring(startingPunctuations, valueLen - endingPunctuations
        - startingPunctuations);
  }

  public static void main(String[] args) {
    // test URLs
    String[] testURLs = new String[] { "www.google.com",
        "http://www.google.com", "https://www.google.com",
        "ftp://www.google.com", "google.com" };
    for (String s : testURLs) {
      System.out.println("isURL(" + s + "): " + isURL(s));
    }

    // test userNames
    String[] userNames = new String[] { "@hugo", "@@hugo", " @hugu2", "@hugo_",
        "2@hugo_", "a@a", "@h0_", "@0abc", "@abc0" };
    for (String s : userNames) {
      System.out.println("isUser(" + s + "): " + isUser(s));
    }

    // test hashTags
    String[] hashTags = new String[] { "#hugo", "##hugo", " #hugu2", "#hugo_",
        "a#a", "#h0_", "#0abc", "#abc0" };
    for (String s : hashTags) {
      System.out.println("isHashTag(" + s + "): " + isHashTag(s));
    }

  }
}

@@ -2862,241 +2862,304 @@
     
-LOG.info(%22substring token '%22 + value + %22'%22);%0A%0A    // TODO try and catch StringIndexOutOfBoundsException%0A    // e.g., %3E:-%5B%0A    return value.substring(startingPunctuations, valueLen - endingPunctuations%0A        - startingPunctuations);
+int substringLen = valueLen - endingPunctuations - startingPunctuations;%0A    if (startingPunctuations %3E= substringLen) %7B%0A      LOG.info(%22trimPunctuation is not possible for '%22 + value + %22'%22);%0A      return value;%0A    %7D else %7B%0A      return value.substring(startingPunctuations, substringLen);%0A    %7D
 %0A  %7D
@@ -3988,14 +3988,270 @@
 %0A    %7D%0A%0A
+    // test Punctuations%0A    String%5B%5D testPunctuations = new String%5B%5D %7B %22.asdf.%22, %22asdf.:--%22,%0A        %22--asdf-!%22, %22:-)%22, %22%3E:-%5B%22 %7D;%0A    for (String s : testPunctuations) %7B%0A      System.out.println(%22trimPunctuation(%22 + s + %22): %22 + trimPunctuation(s));%0A    %7D%0A
   %7D%0A%7D%0A

Fix trimPunctuation in StringUtils