content: package allen.town.focus.twitter.utils.text;
  
  /*
   * Copyright (C) 2007 The Android Open Source Project
   *
   * Licensed 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.
   */
  
  import java.util.regex.Pattern;
  
  public class Regex {
  
      // region TLDs
      private static final String URL_VALID_GTLD =
              "(?:(?:" +
                      "academy|accountants|active|actor|aero|agency|airforce|archi|army|arpa|art|asia|associates|attorney|audio|autos|" +
                      "axa|bar|bargains|bayern|beer|berlin|best|bid|bike|bio|biz|black|blackfriday|blog|blue|bmw|boutique|brussels|build|" +
                      "builders|buzz|bzh|cab|camera|camp|cancerresearch|capetown|capital|cards|care|career|careers|cash|cat|catering|" +
                      "center|ceo|cheap|christmas|church|citic|city|claims|cleaning|click|clinic|clothing|club|codes|coffee|college|cologne|com|" +
                      "community|company|computer|condos|construction|consulting|contractors|cooking|cool|coop|country|credit|" +
                      "creditcard|cruises|cuisinella|dance|dating|deals|degree|democrat|dental|dentist|desi|design|dev|diamonds|digital|direct|" +
                      "directory|discount|dnp|domains|durban|edu|education|email|engineer|engineering|enterprises|equipment|estate|" +
                      "eus|events|exchange|expert|exposed|fail|farm|feedback|finance|financial|fish|fishing|fitness|flights|florist|" +
                      "foo|foundation|frogans|fund|furniture|futbol|gal|gallery|games|gift|gives|glass|gle|global|globo|gmo|gop|google|gov|graphics|" +
                      "gratis|green|gripe|guide|guitars|guru|hamburg|haus|hiphop|hiv|hockey|holdings|holiday|homes|horse|host|house|" +
                      "immobilien|industries|info|ink|institute|insure|int|international|investments|ist|jetzt|jobs|joburg|juegos|kaufen|" +
                      "kim|kitchen|kiwi|koeln|kred|land|lawyer|lease|legal|lgbt|life|lighting|limited|limo|link|live|loans|london|lotto|luxe|" +
                      "luxury|maison|management|mango|market|marketing|media|meet|menu|miami|mil|mini|mobi|moda|moe|monash|mortgage|" +
                      "moscow|motorcycles|museum|nagoya|name|navy|net|network|neustar|news|nhk|ninja|nyc|okinawa|one|onl|online|org|organic|ovh|paris|" +
                      "partners|parts|photo|photography|photos|physio|pics|pictures|pink|place|plumbing|plus|post|press|pro|productions|" +
                      "properties|pub|qpon|quebec|recipes|red|rehab|reise|reisen|ren|rentals|repair|report|republican|rest|reviews|" +
                      "rich|rio|rocks|rodeo|ruhr|ryukyu|saarland|schmidt|schule|scot|services|sexy|shiksha|shoes|singles|social|" +
                      "software|sohu|solar|solutions|soy|space|spiegel|supplies|supply|support|surf|surgery|suzuki|systems|tattoo|" +
                      "tax|tech|technology|tel|tienda|tips|tirol|today|tokyo|tools|town|toys|trade|training|travel|trust|university|uno|" +
                      "vacations|vegas|ventures|versicherung|vet|viajes|villas|vision|vlaanderen|vodka|vote|voting|voto|voyage|wang|" +
                      "watch|webcam|website|wed|wien|wiki|work|wtc|wtf|xxx|xyz|yachts|yokohama|zone|дети|москва|онлайн|орг|сайт|" +
                      "بازار|شبكة|موقع|संगठन|みんな|世界|中信|中文网|公司|公益|商城|商标|在线|我爱你|政务|机构|游戏|移动|组织机构|网址|网络|集团|삼성" +
                      "ac|ad|ae|af|ag|ai|al|am|an|ao|aq|ar|as|at|au|aw|ax|az|ba|bb|bd|be|bf|bg|bh|bi|bj|bl|bm|bn|bo|bq|br|bs|bt|bv|" +
                      "bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|cr|cu|cv|cw|cx|cy|cz|de|dj|dk|dm|do|dz|ec|ee|eg|eh|er|es|et|eu|" +
                      "fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gg|gh|gi|gl|gm|gn|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|im|in|" +
                      "io|iq|ir|is|it|je|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|me|mf|" +
                      "mg|mh|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|mv|mw|mx|my|mz|na|nc|ne|nf|ng|ni|nl|no|np|nr|nu|nz|om|pa|pe|pf|pg|ph|" +
                      "pk|pl|pm|pn|pr|ps|pt|pw|py|qa|re|ro|rs|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|ss|st|su|sv|sx|sy|" +
                      "sz|tc|td|tf|tg|th|tj|tk|tl|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|um|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|" +
                      "za|zm|zw|мкд|мон|рф|срб|укр|қаз|الاردن|الجزائر|السعودية|المغرب|امارات|ایران|بھارت|تونس|سودان|سورية|عمان|" +
                      "فلسطين|قطر|مصر|مليسيا|پاکستان|भारत|বাংলা|ভারত|ਭਾਰਤ|ભારત|இந்தியா|இலங்கை|சிங்கப்பூர்|భారత్|ලංකා|ไทย|გე|中国|中國|台湾|" +
                      "台灣|新加坡|香港|한국" +
                      ")(?=[^\\p{Alnum}@]|$))";
      private static final String URL_VALID_CCTLD =
              "(?:(?:" +
                      "ac|ad|ae|af|ag|ai|al|am|an|ao|aq|ar|as|at|au|aw|ax|az|ba|bb|bd|be|bf|bg|bh|bi|bj|bl|bm|bn|bo|bq|br|bs|bt|bv|" +
                      "bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|cr|cu|cv|cw|cx|cy|cz|de|dj|dk|dm|do|dz|ec|ee|eg|eh|er|es|et|eu|" +
                      "fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gg|gh|gi|gl|gm|gn|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|im|in|" +
                      "io|iq|ir|is|it|je|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|me|mf|" +
                      "mg|mh|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|mv|mw|mx|my|mz|na|nc|ne|nf|ng|ni|nl|no|np|nr|nu|nz|om|pa|pe|pf|pg|ph|" +
                      "pk|pl|pm|pn|pr|ps|pt|pw|py|qa|re|ro|rs|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|ss|st|su|sv|sx|sy|" +
                      "sz|tc|td|tf|tg|th|tj|tk|tl|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|um|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|" +
                      "za|zm|zw|мкд|мон|рф|срб|укр|қаз|الاردن|الجزائر|السعودية|المغرب|امارات|ایران|بھارت|تونس|سودان|سورية|عمان|" +
                      "فلسطين|قطر|مصر|مليسيا|پاکستان|भारत|বাংলা|ভারত|ਭਾਰਤ|ભારત|இந்தியா|இலங்கை|சிங்கப்பூர்|భారత్|ලංකා|ไทย|გე|中国|中國|台湾|" +
                      "台灣|新加坡|香港|한국" +
                      ")(?=[^\\p{Alnum}@]|$))";
      // endregion
      // region Twitters own regex pattern helpers
      private static final String UNICODE_SPACES = "[" +
              "\\u0009-\\u000d" +     //  # White_Space # Cc   [5] <control-0009>..<control-000D>
              "\\u0020" +             // White_Space # Zs       SPACE
              "\\u0085" +             // White_Space # Cc       <control-0085>
              "\\u00a0" +             // White_Space # Zs       NO-BREAK SPACE
              "\\u1680" +             // White_Space # Zs       OGHAM SPACE MARK
              "\\u180E" +             // White_Space # Zs       MONGOLIAN VOWEL SEPARATOR
              "\\u2000-\\u200a" +     // # White_Space # Zs  [11] EN QUAD..HAIR SPACE
              "\\u2028" +             // White_Space # Zl       LINE SEPARATOR
              "\\u2029" +             // White_Space # Zp       PARAGRAPH SEPARATOR
              "\\u202F" +             // White_Space # Zs       NARROW NO-BREAK SPACE
              "\\u205F" +             // White_Space # Zs       MEDIUM MATHEMATICAL SPACE
              "\\u3000" +              // White_Space # Zs       IDEOGRAPHIC SPACE
              "]";
  
      private static String LATIN_ACCENTS_CHARS = "\\u00c0-\\u00d6\\u00d8-\\u00f6\\u00f8-\\u00ff" + // Latin-1
              "\\u0100-\\u024f" + // Latin Extended A and B
              "\\u0253\\u0254\\u0256\\u0257\\u0259\\u025b\\u0263\\u0268\\u026f\\u0272\\u0289\\u028b" + // IPA Extensions
              "\\u02bb" + // Hawaiian
              "\\u0300-\\u036f" + // Combining diacritics
              "\\u1e00-\\u1eff"; // Latin Extended Additional (mostly for Vietnamese)
      private static final String HASHTAG_ALPHA_CHARS = "a-z" + LATIN_ACCENTS_CHARS +
              "\\u0400-\\u04ff\\u0500-\\u0527" +  // Cyrillic
              "\\u2de0-\\u2dff\\ua640-\\ua69f" +  // Cyrillic Extended A/B
              "\\u0591-\\u05bf\\u05c1-\\u05c2\\u05c4-\\u05c5\\u05c7" +
              "\\u05d0-\\u05ea\\u05f0-\\u05f4" + // Hebrew
              "\\ufb1d-\\ufb28\\ufb2a-\\ufb36\\ufb38-\\ufb3c\\ufb3e\\ufb40-\\ufb41" +
              "\\ufb43-\\ufb44\\ufb46-\\ufb4f" + // Hebrew Pres. Forms
              "\\u0610-\\u061a\\u0620-\\u065f\\u066e-\\u06d3\\u06d5-\\u06dc" +
              "\\u06de-\\u06e8\\u06ea-\\u06ef\\u06fa-\\u06fc\\u06ff" + // Arabic
              "\\u0750-\\u077f\\u08a0\\u08a2-\\u08ac\\u08e4-\\u08fe" + // Arabic Supplement and Extended A
              "\\ufb50-\\ufbb1\\ufbd3-\\ufd3d\\ufd50-\\ufd8f\\ufd92-\\ufdc7\\ufdf0-\\ufdfb" + // Pres. Forms A
              "\\ufe70-\\ufe74\\ufe76-\\ufefc" + // Pres. Forms B
              "\\u200c" +                        // Zero-Width Non-Joiner
              "\\u0e01-\\u0e3a\\u0e40-\\u0e4e" + // Thai
              "\\u1100-\\u11ff\\u3130-\\u3185\\uA960-\\uA97F\\uAC00-\\uD7AF\\uD7B0-\\uD7FF" + // Hangul (Korean)
              "\\p{InHiragana}\\p{InKatakana}" +  // Japanese Hiragana and Katakana
              "\\p{InCJKUnifiedIdeographs}" +     // Japanese Kanji / Chinese Han
              "\\u3003\\u3005\\u303b" +           // Kanji/Han iteration marks
              "\\uff21-\\uff3a\\uff41-\\uff5a" +  // full width Alphabet
              "\\uff66-\\uff9f" +                 // half width Katakana
              "\\uffa1-\\uffdc";                  // half width Hangul (Korean)
      private static final String HASHTAG_ALPHA_NUMERIC_CHARS = "0-9\\uff10-\\uff19_" + HASHTAG_ALPHA_CHARS;
      private static final String HASHTAG_ALPHA = "[" + HASHTAG_ALPHA_CHARS +"]";
      private static final String HASHTAG_ALPHA_NUMERIC = "[" + HASHTAG_ALPHA_NUMERIC_CHARS +"]";
      private static final String HASHTAG_SPACES = "[" + UNICODE_SPACES + "]";
  
      /* URL related hash regex collection */
      private static final String URL_VALID_PRECEEDING_CHARS = "(?:[^A-Z0-9@＠$#＃\u202A-\u202E]|^)";
  
      private static final String URL_VALID_CHARS = "[\\p{Alnum}" + LATIN_ACCENTS_CHARS + "]";
      private static final String URL_VALID_SUBDOMAIN = "(?>(?:" + URL_VALID_CHARS + "[" + URL_VALID_CHARS + "\\-_]*)?" + URL_VALID_CHARS + "\\.)";
      private static final String URL_VALID_DOMAIN_NAME = "(?:(?:" + URL_VALID_CHARS + "[" + URL_VALID_CHARS + "\\-]*)?" + URL_VALID_CHARS + "\\.)";
      /* Any non-space, non-punctuation characters. \p{Z} = any kind of whitespace or invisible separator. */
      private static final String URL_VALID_UNICODE_CHARS = "[.[^\\p{Punct}\\s\\p{Z}\\p{InGeneralPunctuation}]]";
  
  
      private static final String URL_PUNYCODE = "(?:xn--[0-9a-z]+)";
      private static final String SPECIAL_URL_VALID_CCTLD = "(?:(?:" + "co|tv" + ")(?=[^\\p{Alnum}@]|$))";
  
      private static final String URL_VALID_DOMAIN =
              "(?:" +                                                   // subdomains + domain + TLD
                      URL_VALID_SUBDOMAIN + "+" + URL_VALID_DOMAIN_NAME +   // e.g. www.twitter.com, foo.co.jp, bar.co.uk
                      "(?:" + URL_VALID_GTLD + "|" + URL_VALID_CCTLD + "|" + URL_PUNYCODE + ")" +
                      ")" +
                      "|(?:" +                                                  // domain + gTLD + some ccTLD
                      URL_VALID_DOMAIN_NAME +                                 // e.g. twitter.com
                      "(?:" + URL_VALID_GTLD + "|" + URL_PUNYCODE + "|" + SPECIAL_URL_VALID_CCTLD + ")" +
                      ")" +
                      "|(?:" + "(?<=https?://)" +
                      "(?:" +
                      "(?:" + URL_VALID_DOMAIN_NAME + URL_VALID_CCTLD + ")" +  // protocol + domain + ccTLD
                      "|(?:" +
                      URL_VALID_UNICODE_CHARS + "+\\." +                     // protocol + unicode domain + TLD
                      "(?:" + URL_VALID_GTLD + "|" + URL_VALID_CCTLD + ")" +
                      ")" +
                      ")" +
                      ")" +
                      "|(?:" +                                                  // domain + ccTLD + '/'
                      URL_VALID_DOMAIN_NAME + URL_VALID_CCTLD + "(?=/)" +     // e.g. t.co/
                      ")";
  
      private static final String URL_VALID_PORT_NUMBER = "[0-9]++";
  
      private static final String URL_VALID_GENERAL_PATH_CHARS = "[a-z0-9!\\*';:=\\+,.\\$/%#\\[\\]\\-_~\\|&@" + LATIN_ACCENTS_CHARS + "]";
      /** Allow URL paths to contain up to two nested levels of balanced parens
       *  1. Used in Wikipedia URLs like /Primer_(film)
       *  2. Used in IIS sessions like /S(dfd346)/
       *  3. Used in Rdio URLs like /track/We_Up_(Album_Version_(Edited))/
       **/
      private static final String URL_BALANCED_PARENS = "\\(" +
              "(?:" +
              URL_VALID_GENERAL_PATH_CHARS + "+" +
              "|" +
              // allow one nested level of balanced parentheses
              "(?:" +
              URL_VALID_GENERAL_PATH_CHARS + "*" +
              "\\(" +
              URL_VALID_GENERAL_PATH_CHARS + "+" +
              "\\)" +
              URL_VALID_GENERAL_PATH_CHARS + "*" +
              ")" +
              ")" +
              "\\)";
  
      /** Valid end-of-path characters (so /foo. does not gobble the period).
       *   2. Allow =&# for empty URL parameters and other URL-join artifacts
       **/
      private static final String URL_VALID_PATH_ENDING_CHARS = "[a-z0-9=_#/\\-\\+" + LATIN_ACCENTS_CHARS + "]|(?:" + URL_BALANCED_PARENS +")";
  
      private static final String URL_VALID_PATH = "(?:" +
              "(?:" +
              URL_VALID_GENERAL_PATH_CHARS + "*" +
              "(?:" + URL_BALANCED_PARENS + URL_VALID_GENERAL_PATH_CHARS + "*)*" +
              URL_VALID_PATH_ENDING_CHARS +
              ")|(?:@" + URL_VALID_GENERAL_PATH_CHARS + "+/)" +
              ")";
  
      private static final String URL_VALID_URL_QUERY_CHARS = "[a-z0-9!?\\*'\\(\\);:&=\\+\\$/%#\\[\\]\\-_\\.,~\\|@]";
      private static final String URL_VALID_URL_QUERY_ENDING_CHARS = "[a-z0-9_&=#/]";
      private static final String VALID_URL_PATTERN_STRING =
              "(" +                                                            //  $1 total match
                      "(" +                                                          //  $3 URL
                      "(https?://)?" +                                             //  $4 Protocol (optional)
                      "(" + URL_VALID_DOMAIN + ")" +                               //  $5 Domain(s)
                      "(?::(" + URL_VALID_PORT_NUMBER +"))?" +                     //  $6 Port number (optional)
                      "(/" +
                      URL_VALID_PATH + "*+" +
                      ")?" +                                                       //  $7 URL Path and anchor
                      "(\\?" + URL_VALID_URL_QUERY_CHARS + "*" +                   //  $8 Query String
                      URL_VALID_URL_QUERY_ENDING_CHARS + ")?" +
                      ")" +
                      ")";
  
      private static String AT_SIGNS_CHARS = "@\uFF20";
  
      private static final String DOLLAR_SIGN_CHAR = "\\$";
      private static final String CASHTAG = "[a-z]{1,6}(?:[._][a-z]{1,2})?";
  
    /* Begin public constants */
  
      public static final int VALID_HASHTAG_GROUP_BEFORE = 1;
      public static final int VALID_HASHTAG_GROUP_HASH = 2;
      public static final int VALID_HASHTAG_GROUP_TAG = 3;
      public static final Pattern INVALID_HASHTAG_MATCH_END = Pattern.compile("^(?:[#＃]|://)");
      public static final Pattern RTL_CHARACTERS = Pattern.compile("[\u0600-\u06FF\u0750-\u077F\u0590-\u05FF\uFE70-\uFEFF]");
  
      public static final Pattern AT_SIGNS = Pattern.compile("[" + AT_SIGNS_CHARS + "]");
      public static final int VALID_MENTION_OR_LIST_GROUP_BEFORE = 1;
      public static final int VALID_MENTION_OR_LIST_GROUP_AT = 2;
      public static final int VALID_MENTION_OR_LIST_GROUP_USERNAME = 3;
      public static final int VALID_MENTION_OR_LIST_GROUP_LIST = 4;
  
      public static final Pattern VALID_REPLY = Pattern.compile("^(?:" + UNICODE_SPACES + ")*" + AT_SIGNS + "([a-z0-9_]{1,20})", Pattern.CASE_INSENSITIVE);
      public static final int VALID_REPLY_GROUP_USERNAME = 1;
  
      public static final Pattern INVALID_MENTION_MATCH_END = Pattern.compile("^(?:[" + AT_SIGNS_CHARS + LATIN_ACCENTS_CHARS + "]|://)");
  
      public static final int VALID_URL_GROUP_ALL          = 1;
      public static final int VALID_URL_GROUP_BEFORE       = 2;
      public static final int VALID_URL_GROUP_URL          = 3;
      public static final int VALID_URL_GROUP_PROTOCOL     = 4;
      public static final int VALID_URL_GROUP_DOMAIN       = 5;
      public static final int VALID_URL_GROUP_PORT         = 6;
      public static final int VALID_URL_GROUP_PATH         = 7;
      public static final int VALID_URL_GROUP_QUERY_STRING = 8;
  
      public static final Pattern VALID_TCO_URL = Pattern.compile("^https?:\\/\\/t\\.co\\/[a-z0-9]+", Pattern.CASE_INSENSITIVE);
      public static final Pattern INVALID_URL_WITHOUT_PROTOCOL_MATCH_BEGIN = Pattern.compile("[-_./]$");
  
      public static final int VALID_CASHTAG_GROUP_BEFORE = 1;
      public static final int VALID_CASHTAG_GROUP_DOLLAR = 2;
      public static final int VALID_CASHTAG_GROUP_CASHTAG = 3;
      // endregion
  
      public static final Pattern VALID_URL = Pattern.compile(VALID_URL_PATTERN_STRING, Pattern.CASE_INSENSITIVE);
      public static final Pattern CASHTAG_PATTERN = Pattern.compile("(" + DOLLAR_SIGN_CHAR + ")(" + CASHTAG + ")" +"(?=$|\\s|\\p{Punct})", Pattern.CASE_INSENSITIVE);
      public static final Pattern MENTION_PATTERN = Pattern.compile("(" + AT_SIGNS + "+)([a-z0-9_]{1,20})(/[a-z][a-z0-9_\\-]{0,24})?", Pattern.CASE_INSENSITIVE);
      public static final Pattern HASHTAG_PATTERN = Pattern.compile("(?:^|" + HASHTAG_SPACES + ")" + "(#|\uFF03)(" + HASHTAG_ALPHA_NUMERIC + "*" + HASHTAG_ALPHA + HASHTAG_ALPHA_NUMERIC + "*)", Pattern.CASE_INSENSITIVE);
  
  }
  