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type TDiacraticList = {[key:string]:string};
// https://github.com/andrewrk/node-diacritics/blob/master/index.js
var latin_pat:RegExp;
const accent_pat = '[\u0300-\u036F\u{b7}\u{2be}]'; // \u{2bc}
const accent_reg = new RegExp(accent_pat,'g');
var diacritic_patterns:TDiacraticList;
const latin_convert:TDiacraticList = {
'æ': 'ae',
'ⱥ': 'a',
'ø': 'o',
};
const convert_pat = new RegExp(Object.keys(latin_convert).join('|'),'g');
export const DIACRITICS:TDiacraticList = {
" ":" ",
0:"߀",
A:"ⒶＡÀÁÂẦẤẪẨÃĀĂẰẮẴẲȦǠÄǞẢÅǺǍȀȂẠẬẶḀĄȺⱯ",
AA:"Ꜳ",
AE:"ÆǼǢ",
AO:"Ꜵ",
AU:"Ꜷ",
AV:"ꜸꜺ",
AY:"Ꜽ",
B:"ⒷＢḂḄḆɃƁ",
C:"ⒸＣꜾḈĆCĈĊČÇƇȻ",
D:"ⒹＤḊĎḌḐḒḎĐƊƉᴅꝹ",
Dh:"Ð",
DZ:"DZDŽ",
Dz:"DzDž",
E:"ɛⒺＥÈÉÊỀẾỄỂẼĒḔḖĔĖËẺĚȄȆẸỆȨḜĘḘḚƐƎᴇ",
F:"ꝼⒻＦḞƑꝻ",
G:"ⒼＧǴĜḠĞĠǦĢǤƓꞠꝽꝾɢ",
H:"ⒽＨĤḢḦȞḤḨḪĦⱧⱵꞍ",
I:"ⒾＩÌÍÎĨĪĬİÏḮỈǏȈȊỊĮḬƗ",
J:"ⒿＪĴɈȷ",
K:"ⓀＫḰǨḲĶḴƘⱩꝀꝂꝄꞢ",
L:"ⓁＬĿĹĽḶḸĻḼḺŁȽⱢⱠꝈꝆꞀ",
LJ:"LJ",
Lj:"Lj",
M:"ⓂＭḾṀṂⱮƜϻ",
N:"ꞤȠⓃＮǸŃÑṄŇṆŅṊṈƝꞐᴎ",
NJ:"NJ",
Nj:"Nj",
O:"ⓄＯÒÓÔỒỐỖỔÕṌȬṎŌṐṒŎȮȰÖȪỎŐǑȌȎƠỜỚỠỞỢỌỘǪǬØǾƆƟꝊꝌ",
OE:"Œ",
OI:"Ƣ",
OO:"Ꝏ",
OU:"Ȣ",
P:"ⓅＰṔṖƤⱣꝐꝒꝔ",
Q:"ⓆＱꝖꝘɊ",
R:"ⓇＲŔṘŘȐȒṚṜŖṞɌⱤꝚꞦꞂ",
S:"ⓈＳẞŚṤŜṠŠṦṢṨȘŞⱾꞨꞄ",
T:"ⓉＴṪŤṬȚŢṰṮŦƬƮȾꞆ",
Th:"Þ",
TZ:"Ꜩ",
U:"ⓊＵÙÚÛŨṸŪṺŬÜǛǗǕǙỦŮŰǓȔȖƯỪỨỮỬỰỤṲŲṶṴɄ",
V:"ⓋＶṼṾƲꝞɅ",
VY:"Ꝡ",
W:"ⓌＷẀẂŴẆẄẈⱲ",
X:"ⓍＸẊẌ",
Y:"ⓎＹỲÝŶỸȲẎŸỶỴƳɎỾ",
Z:"ⓏＺŹẐŻŽẒẔƵȤⱿⱫꝢ",
a:"ⓐａẚàáâầấẫẩãāăằắẵẳȧǡäǟảåǻǎȁȃạậặḁąⱥɐɑ",
aa:"ꜳ",
ae:"æǽǣ",
ao:"ꜵ",
au:"ꜷ",
av:"ꜹꜻ",
ay:"ꜽ",
b:"ⓑｂḃḅḇƀƃɓƂ",
c:"ｃⓒćĉċčçḉƈȼꜿↄ",
d:"ⓓｄḋďḍḑḓḏđƌɖɗƋᏧԁꞪ",
dh:"ð",
dz:"dzdž",
e:"ⓔｅèéêềếễểẽēḕḗĕėëẻěȅȇẹệȩḝęḙḛɇǝ",
f:"ⓕｆḟƒ",
ff:"ff",
fi:"fi",
fl:"fl",
ffi:"ffi",
ffl:"ffl",
g:"ⓖｇǵĝḡğġǧģǥɠꞡꝿᵹ",
h:"ⓗｈĥḣḧȟḥḩḫẖħⱨⱶɥ",
hv:"ƕ",
i:"ⓘｉìíîĩīĭïḯỉǐȉȋịįḭɨı",
j:"ⓙｊĵǰɉ",
k:"ⓚｋḱǩḳķḵƙⱪꝁꝃꝅꞣ",
l:"ⓛｌŀĺľḷḹļḽḻſłƚɫⱡꝉꞁꝇɭ",
lj:"lj",
m:"ⓜｍḿṁṃɱɯ",
n:"ⓝｎǹńñṅňṇņṋṉƞɲʼnꞑꞥлԉ",
nj:"nj",
o:"ⓞｏòóôồốỗổõṍȭṏōṑṓŏȯȱöȫỏőǒȍȏơờớỡởợọộǫǭøǿꝋꝍɵɔᴑ",
oe:"œ",
oi:"ƣ",
oo:"ꝏ",
ou:"ȣ",
p:"ⓟｐṕṗƥᵽꝑꝓꝕρ",
q:"ⓠｑɋꝗꝙ",
r:"ⓡｒŕṙřȑȓṛṝŗṟɍɽꝛꞧꞃ",
s:"ⓢｓśṥŝṡšṧṣṩșşȿꞩꞅẛʂ",
ss:"ß",
t:"ⓣｔṫẗťṭțţṱṯŧƭʈⱦꞇ",
th:"þ",
tz:"ꜩ",
u:"ⓤｕùúûũṹūṻŭüǜǘǖǚủůűǔȕȗưừứữửựụṳųṷṵʉ",
v:"ⓥｖṽṿʋꝟʌ",
vy:"ꝡ",
w:"ⓦｗẁẃŵẇẅẘẉⱳ",
x:"ⓧｘẋẍ",
y:"ⓨｙỳýŷỹȳẏÿỷẙỵƴɏỿ",
z:"ⓩｚźẑżžẓẕƶȥɀⱬꝣ"
}
/**
* code points generated from toCodePoints();
* removed 65339 to 65345
*/
export const code_points = [
[ 67, 67 ],
[ 160, 160 ],
[ 192, 438 ],
[ 452, 652 ],
[ 961, 961 ],
[ 1019, 1019 ],
[ 1083, 1083 ],
[ 1281, 1289 ],
[ 1984, 1984 ],
[ 5095, 5095 ],
[ 7429, 7441 ],
[ 7545, 7549 ],
[ 7680, 7935 ],
[ 8580, 8580 ],
[ 9398, 9449 ],
[ 11360, 11391 ],
[ 42792, 42793 ],
[ 42802, 42851 ],
[ 42873, 42897 ],
[ 42912, 42922 ],
[ 64256, 64260 ],
[ 65313, 65338 ],
[ 65345, 65370 ]
];
/**
* Remove accents
* via https://github.com/krisk/Fuse/issues/133#issuecomment-318692703
*
*/
export const asciifold = (str:string):string => {
return str
.normalize('NFKD')
.replace(accent_reg, '')
.toLowerCase()
.replace(convert_pat,function(foreignletter) {
return latin_convert[foreignletter];
});
};
/**
* Convert list of diacritics to array of code points
*
*/
// @ts-ignore
function toCodePoints(tolerance=8){
var char_codes:number[] = [];
for( let letter in DIACRITICS ){
let _diacritics = DIACRITICS[letter];
for( let n = 0; n < _diacritics.length; n++ ){
var code_point = _diacritics.codePointAt(n);
if( code_point ) char_codes.push( code_point );
}
}
//https://stackoverflow.com/questions/40431572/is-there-a-simple-way-to-group-js-array-values-by-range
char_codes.sort((a, b) => a - b);
var accumulator: number[][] = [];
char_codes.reduce(function (accumulator, currentValue, index, source) {
if( !index ){
accumulator.push( [currentValue,currentValue] );
}else if( currentValue - source[index - 1] > tolerance ){
accumulator.push( [currentValue,currentValue] );
}else{
let range = accumulator.pop();
if( range ){
accumulator.push( [range[0],currentValue]);
}
}
return accumulator;
}, accumulator);
}
/**
* Convert array of strings to a regular expression
* ex ['ab','a'] => (?:ab|a)
* ex ['a','b'] => [ab]
*
*/
export const arrayToPattern = (chars:string[],glue:string='|'):string =>{
if( chars.length == 1 ){
return chars[0];
}
var longest = 1;
chars.forEach((a)=>{longest = Math.max(longest,a.length)});
if( longest == 1 ){
return '['+chars.join('')+']';
}
return '(?:'+chars.join(glue)+')';
};
/**
* Get all possible combinations of substrings that add up to the given string
* https://stackoverflow.com/questions/30169587/find-all-the-combination-of-substrings-that-add-up-to-the-given-string
*
*/
export const allSubstrings = (input:string):string[][] => {
if( input.length === 1) return [[input]];
var result:string[][] = [];
allSubstrings(input.substring(1)).forEach(function(subresult) {
var tmp = subresult.slice(0);
tmp[0] = input.charAt(0) + tmp[0];
result.push(tmp);
tmp = subresult.slice(0);
tmp.unshift(input.charAt(0));
result.push(tmp);
});
return result;
}
/**
* Generate a list of diacritics from the list of code points
*
*/
export const generateDiacritics = ():TDiacraticList => {
var diacritics:{[key:string]:string[]} = {};
code_points.forEach((code_range)=>{
for(let i = code_range[0]; i <= code_range[1]; i++){
let diacritic = String.fromCharCode(i);
let latin = asciifold(diacritic);
if( latin == diacritic.toLowerCase() ){
continue;
}
if( !(latin in diacritics) ){
diacritics[latin] = [latin];
}
var patt = new RegExp( arrayToPattern(diacritics[latin]),'iu');
if( diacritic.match(patt) ){
continue;
}
diacritics[latin].push(diacritic);
}
});
var latin_chars = Object.keys(diacritics);
// latin character pattern
// match longer substrings first
latin_chars = latin_chars.sort((a, b) => b.length - a.length );
latin_pat = new RegExp('('+ arrayToPattern(latin_chars) + accent_pat + '*)','g');
// build diacritic patterns
// ae needs:
// (?:(?:ae|Æ|Ǽ|Ǣ)|(?:A|Ⓐ|Ａ...)(?:E|ɛ|Ⓔ...))
var diacritic_patterns:TDiacraticList = {};
latin_chars.sort((a,b) => a.length -b.length).forEach((latin)=>{
var substrings = allSubstrings(latin);
var pattern = substrings.map((sub_pat)=>{
sub_pat = sub_pat.map((l)=>{
if( diacritics.hasOwnProperty(l) ){
return arrayToPattern(diacritics[l]);
}
return l;
});
return arrayToPattern(sub_pat,'');
});
diacritic_patterns[latin] = arrayToPattern(pattern);
});
return diacritic_patterns;
}
/**
* Expand a regular expression pattern to include diacritics
* eg /a/ becomes /aⓐａẚàáâầấẫẩãāăằắẵẳȧǡäǟảåǻǎȁȃạậặḁąⱥɐɑAⒶＡÀÁÂẦẤẪẨÃĀĂẰẮẴẲȦǠÄǞẢÅǺǍȀȂẠẬẶḀĄȺⱯ/
*
*/
export const diacriticRegexPoints = (regex:string):string => {
if( diacritic_patterns === undefined ){
diacritic_patterns = generateDiacritics();
}
const decomposed = regex.normalize('NFKD').toLowerCase();
return decomposed.split(latin_pat).map((part:string)=>{
if( part == '' ){
return '';
}
// "ffl" or "ffl"
const no_accent = asciifold(part);
if( diacritic_patterns.hasOwnProperty(no_accent) ){
return diacritic_patterns[no_accent];
}
// 'أهلا' (\u{623}\u{647}\u{644}\u{627}) or 'أهلا' (\u{627}\u{654}\u{647}\u{644}\u{627})
const composed_part = part.normalize('NFC');
if( composed_part != part ){
return arrayToPattern([part,composed_part]);
}
return part;
}).join('');
}
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