1//
  2// Copyright (c) 2019 Ted Unangst <tedu@tedunangst.com>
  3//
  4// Permission to use, copy, modify, and distribute this software for any
  5// purpose with or without fee is hereby granted, provided that the above
  6// copyright notice and this permission notice appear in all copies.
  7//
  8// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15
 16package main
 17
 18import (
 19	"regexp"
 20
 21	"github.com/mattn/go-runewidth"
 22)
 23
 24var bigboldshitz = "𝐀𝐁𝐂𝐃𝐄𝐅𝐆𝐇𝐈𝐉𝐊𝐋𝐌𝐍𝐎𝐏𝐐𝐑𝐒𝐓𝐔𝐕𝐖𝐗𝐘𝐙"
 25var lilboldshitz = "𝐚𝐛𝐜𝐝𝐞𝐟𝐠𝐡𝐢𝐣𝐤𝐥𝐦𝐧𝐨𝐩𝐪𝐫𝐬𝐭𝐮𝐯𝐰𝐱𝐲𝐳"
 26var moeboldshitz = "𝗔𝗕𝗖𝗗𝗘𝗙𝗚𝗛𝗜𝗝𝗞𝗟𝗠𝗡𝗢𝗣𝗤𝗥𝗦𝗧𝗨𝗩𝗪𝗫𝗬𝗭"
 27var morboldshitz = "𝗮𝗯𝗰𝗱𝗲𝗳𝗴𝗵𝗶𝗷𝗸𝗹𝗺𝗻𝗼𝗽𝗾𝗿𝘀𝘁𝘂𝘃𝘄𝘅𝘆𝘇"
 28var biggothshitz = "𝕬𝕭𝕮𝕯𝕰𝕱𝕲𝕳𝕴𝕵𝕶𝕷𝕸𝕹𝕺𝕻𝕼𝕽𝕾𝕿𝖀𝖁𝖂𝖃𝖄𝖅"
 29var lilgothshitz = "𝖆𝖇𝖈𝖉𝖊𝖋𝖌𝖍𝖎𝖏𝖐𝖑𝖒𝖓𝖔𝖕𝖖𝖗𝖘𝖙𝖚𝖛𝖜𝖝𝖞𝖟"
 30var moegothshitz = "𝔄𝔅𝕮𝔇𝔈𝔉𝔊𝕳ℑ𝔍𝔎𝔏𝔐𝔑𝔒𝔓𝔔ℜ𝔖𝔗𝔘𝔙𝔚𝔛𝔜𝖅"
 31var morgothshitz = "𝔞𝔟𝔠𝔡𝔢𝔣𝔤𝔥𝔦𝔧𝔨𝔩𝔪𝔫𝔬𝔭𝔮𝔯𝔰𝔱𝔲𝔳𝔴𝔵𝔶𝔷"
 32var bigitalshitz = "𝑨𝑩𝑪𝑫𝑬𝑭𝑮𝑯𝑰𝑱𝑲𝑳𝑴𝑵𝑶𝑷𝑸𝑹𝑺𝑻𝑼𝑽𝑾𝑿𝒀𝒁"
 33var lilitalshitz = "𝒂𝒃𝒄𝒅𝒆𝒇𝒈𝒉𝒊𝒋𝒌𝒍𝒎𝒏𝒐𝒑𝒒𝒓𝒔𝒕𝒖𝒗𝒘𝒙𝒚𝒛"
 34var moeitalshitz = "𝘼𝘽𝘾𝘿𝙀𝙁𝙂𝙃𝙄𝙅𝙆𝙇𝙈𝙉𝙊𝙋𝙌𝙍𝙎𝙏𝙐𝙑𝙒𝙓𝙔𝙕"
 35var moritalshitz = "𝙖𝙗𝙘𝙙𝙚𝙛𝙜𝙝𝙞𝙟𝙠𝙡𝙢𝙣𝙤𝙥𝙦𝙧𝙨𝙩𝙪𝙫𝙬𝙭𝙮𝙯"
 36var bigbangshitz = "𝔸𝔹ℂ𝔻𝔼𝔽𝔾ℍ𝕀𝕁𝕂𝕃𝕄ℕ𝕆ℙℚℝ𝕊𝕋𝕌𝕍𝕎𝕏𝕐ℤ"
 37var lilbangshitz = "𝕒𝕓𝕔𝕕𝕖𝕗𝕘𝕙𝕚𝕛𝕜𝕝𝕞𝕟𝕠𝕡𝕢𝕣𝕤𝕥𝕦𝕧𝕨𝕩𝕪𝕫"
 38var bigwideshitz = "ＡＢＣＤＥＦＧＨＩＪＫＬＭＮＯＰＱＲＳＴＵＶＷＸＹＺ"
 39var lilwideshitz = "ａｂｃｄｅｆｇｈｉｊｋｌｍｎｏｐｑｒｓｔｕｖｗｘｙｚ"
 40var bigblokshitz = "🅰🅱🅲🅳🅴🅵🅶🅷🅸🅹🅺🅻🅼🅽🅾🅿🆀🆁🆂🆃🆄🆅🆆🆇🆈🆉"
 41
 42var re_alltheshitz = regexp.MustCompile(`([` +
 43	bigboldshitz + lilboldshitz +
 44	moeboldshitz + morboldshitz +
 45	biggothshitz + lilgothshitz +
 46	moegothshitz + morgothshitz +
 47	bigitalshitz + lilitalshitz +
 48	moeitalshitz + moritalshitz +
 49	bigbangshitz + lilbangshitz +
 50	bigwideshitz + lilwideshitz +
 51	bigblokshitz +
 52	"][ '\ufe0f]?){3,}")
 53
 54var allUppers = []string{bigboldshitz, moeboldshitz, biggothshitz, bigwideshitz, moegothshitz, bigitalshitz, moeitalshitz, bigbangshitz, bigblokshitz}
 55var allLowers = []string{lilboldshitz, morboldshitz, lilgothshitz, lilwideshitz, morgothshitz, lilitalshitz, moritalshitz, lilbangshitz}
 56
 57var re_moredumb = regexp.MustCompile("[\U0001f44f\U0001f6a8\U000026a0]\ufe0f?")
 58
 59// this may not be especially fast
 60func unpucker(s string) string {
 61	fixer := func(r string) string {
 62		x := make([]byte, len(r))
 63		xi := 0
 64	loop1:
 65		for _, c := range r {
 66			xi++
 67			if c == ' ' || c == '\'' {
 68				x[xi] = byte(c)
 69				continue
 70			}
 71			for _, set := range allUppers {
 72				i := 0
 73				for _, rr := range set {
 74					if rr == c {
 75						x[xi] = byte('A' + i)
 76						continue loop1
 77					}
 78					i++
 79				}
 80			}
 81			for _, set := range allLowers {
 82				i := 0
 83				for _, rr := range set {
 84					if rr == c {
 85						x[xi] = byte('a' + i)
 86						continue loop1
 87					}
 88					i++
 89				}
 90			}
 91			x[xi] = '.'
 92		}
 93		return string(x)
 94	}
 95	s = re_alltheshitz.ReplaceAllStringFunc(s, fixer)
 96
 97	s = re_moredumb.ReplaceAllString(s, ".")
 98
 99	zw := false
100	for _, c := range s {
101		if runewidth.RuneWidth(c) == 0 {
102			zw = true
103			break
104		}
105	}
106	if zw {
107		x := make([]byte, 0, len(s))
108		zw = false
109		for _, c := range s {
110			if runewidth.RuneWidth(c) == 0 {
111				if zw {
112					continue
113				}
114				zw = true
115			} else {
116				zw = false
117			}
118			q := string(c)
119			x = append(x, []byte(q)...)
120		}
121		return string(x)
122	}
123	return s
124}