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var fs = require('fs');
var jsesc = require('jsesc');
var regenerate = require('regenerate');
var object = {};
var toString = object.toString;
var isArray = function(value) {
return toString.call(value) == '[object Array]';
};
var readJSON = function(fileName) {
var contents = fs.readFileSync('data/' + fileName + '.json', 'utf-8');
var object = JSON.parse(contents);
if (isArray(object)) {
return object;
}
return jsesc(object, {
'compact': true,
'quotes': 'single'
});
};
var joinStrings = function(a, b) {
if (a && b) {
return a + '|' + b;
}
return a + b;
};
var loneCodePoints = readJSON('encode-lone-code-points');
var arrayEncodeMultipleSymbols = readJSON('encode-paired-symbols');
var arrayEncodeMultipleSymbolsASCII = arrayEncodeMultipleSymbols
.filter(function(string) {
return /^[\0-\x7F]+$/.test(string);
});
var encodeSingleSymbolsASCII = regenerate(loneCodePoints)
.removeRange(0x7F + 1, 0x10FFFF).toString();
var encodeSingleSymbolsNonASCII = regenerate(loneCodePoints)
.removeRange(0x00, 0x7F).toString();
var encodeMultipleSymbolsASCII = jsesc(
arrayEncodeMultipleSymbolsASCII.join('|')
);
var encodeMultipleSymbolsNonASCII = jsesc(
regenerate.difference(
arrayEncodeMultipleSymbols,
arrayEncodeMultipleSymbolsASCII
).join('|')
);
var encodeASCII = joinStrings(
encodeMultipleSymbolsASCII,
encodeSingleSymbolsASCII
);
var encodeNonASCII = joinStrings(
encodeMultipleSymbolsNonASCII,
encodeSingleSymbolsNonASCII
);
module.exports = {
'encodeMap': readJSON('encode-map'),
'encodeASCII': encodeASCII, // not used
'encodeNonASCII': encodeNonASCII,
'decodeOverrides': readJSON('decode-map-overrides'),
'decodeMap': readJSON('decode-map'),
'decodeMapLegacy': readJSON('decode-map-legacy'),
'astralSymbol': regenerate.fromCodePointRange(0x010000, 0x10FFFF),
'invalidCodePoints': jsesc(readJSON('invalid-code-points')),
'regexDecimalEscapeSource': '&#([0-9]+)(;?)',
'regexHexadecimalEscapeSource': '&#[xX]([a-fA-F0-9]+)(;?)',
'regexNamedReferenceSource': '&([0-9a-zA-Z]+);',
'regexLegacyReferenceSource': '&(' +
readJSON('decode-legacy-named-references').join('|') + ')([=a-zA-Z0-9])?',
'version': JSON.parse(fs.readFileSync('package.json', 'utf-8')).version
};
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