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 biggothshitz = "𝕬𝕭𝕮𝕯𝕰𝕱𝕲𝕳𝕴𝕵𝕶𝕷𝕸𝕹𝕺𝕻𝕼𝕽𝕾𝕿𝖀𝖁𝖂𝖃𝖄𝖅"
 27var lilgothshitz = "𝖆𝖇𝖈𝖉𝖊𝖋𝖌𝖍𝖎𝖏𝖐𝖑𝖒𝖓𝖔𝖕𝖖𝖗𝖘𝖙𝖚𝖛𝖜𝖝𝖞𝖟"
 28var moegothshitz = "𝔄𝔅𝕮𝔇𝔈𝔉𝔊𝕳ℑ𝔍𝔎𝔏𝔐𝔑𝔒𝔓𝔔ℜ𝔖𝔗𝔘𝔙𝔚𝔛𝔜𝖅"
 29var morgothshitz = "𝔞𝔟𝔠𝔡𝔢𝔣𝔤𝔥𝔦𝔧𝔨𝔩𝔪𝔫𝔬𝔭𝔮𝔯𝔰𝔱𝔲𝔳𝔴𝔵𝔶𝔷"
 30var bigitalshitz = "𝑨𝑩𝑪𝑫𝑬𝑭𝑮𝑯𝑰𝑱𝑲𝑳𝑴𝑵𝑶𝑷𝑸𝑹𝑺𝑻𝑼𝑽𝑾𝑿𝒀𝒁"
 31var lilitalshitz = "𝒂𝒃𝒄𝒅𝒆𝒇𝒈𝒉𝒊𝒋𝒌𝒍𝒎𝒏𝒐𝒑𝒒𝒓𝒔𝒕𝒖𝒗𝒘𝒙𝒚𝒛"
 32var bigbangshitz = "𝔸𝔹ℂ𝔻𝔼𝔽𝔾ℍ𝕀𝕁𝕂𝕃𝕄ℕ𝕆ℙℚℝ𝕊𝕋𝕌𝕍𝕎𝕏𝕐ℤ"
 33var lilbangshitz = "𝕒𝕓𝕔𝕕𝕖𝕗𝕘𝕙𝕚𝕛𝕜𝕝𝕞𝕟𝕠𝕡𝕢𝕣𝕤𝕥𝕦𝕧𝕨𝕩𝕪𝕫"
 34var bigblokshitz = "🅰🅱🅲🅳🅴🅵🅶🅷🅸🅹🅺🅻🅼🅽🅾🅿🆀🆁🆂🆃🆄🆅🆆🆇🆈🆉"
 35
 36var re_alltheshitz = regexp.MustCompile(`([` +
 37	bigboldshitz + lilboldshitz +
 38	biggothshitz + lilgothshitz +
 39	moegothshitz + morgothshitz +
 40	bigitalshitz + lilitalshitz +
 41	bigbangshitz + lilbangshitz +
 42	bigblokshitz +
 43	"][ '\ufe0f]?){3,}")
 44
 45var re_moredumb = regexp.MustCompile(`[👏]`)
 46
 47// this may not be especially fast
 48func unpucker(s string) string {
 49	fixer := func(r string) string {
 50		x := make([]byte, len(r))
 51		xi := 0
 52	loop1:
 53		for _, c := range r {
 54			xi++
 55			if c == ' ' || c == '\'' {
 56				x[xi] = byte(c)
 57				continue
 58			}
 59			for _, set := range []string{bigboldshitz, biggothshitz, moegothshitz, bigitalshitz, bigbangshitz, bigblokshitz} {
 60				i := 0
 61				for _, rr := range set {
 62					if rr == c {
 63						x[xi] = byte('A' + i)
 64						continue loop1
 65					}
 66					i++
 67				}
 68			}
 69			for _, set := range []string{lilboldshitz, lilgothshitz, morgothshitz, lilitalshitz, lilbangshitz} {
 70				i := 0
 71				for _, rr := range set {
 72					if rr == c {
 73						x[xi] = byte('a' + i)
 74						continue loop1
 75					}
 76					i++
 77				}
 78			}
 79			x[xi] = '.'
 80		}
 81		return string(x)
 82	}
 83	s = re_alltheshitz.ReplaceAllStringFunc(s, fixer)
 84
 85	s = re_moredumb.ReplaceAllString(s, ".")
 86
 87	zw := false
 88	for _, c := range s {
 89		if runewidth.RuneWidth(c) == 0 {
 90			zw = true
 91			break
 92		}
 93	}
 94	if zw {
 95		x := make([]byte, 0, len(s))
 96		zw = false
 97		for _, c := range s {
 98			if runewidth.RuneWidth(c) == 0 {
 99				if zw {
100					continue
101				}
102				zw = true
103			} else {
104				zw = false
105			}
106			q := string(c)
107			x = append(x, []byte(q)...)
108		}
109		return string(x)
110	}
111	return s
112}