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var punycode = require('punycode');
var entities = require('./entities.json');
var revEntities = {};
for (var key in entities) {
var e = entities[key];
var s = typeof e === 'number' ? String.fromCharCode(e) : e;
revEntities[s] = key;
}
exports.encode = function (str) {
if (typeof str !== 'string') {
throw new TypeError('Expected a String');
}
return str.split('').map(function (c) {
var e = revEntities[c];
var cc = c.charCodeAt(0);
if (e) {
return '&' + (e.match(/;$/) ? e : e + ';');
}
else if (c.match(/\s/)) {
return c;
}
else if (cc < 32 || cc >= 127) {
return '&#' + cc + ';';
}
else {
return c;
}
}).join('');
};
exports.decode = function (str) {
if (typeof str !== 'string') {
throw new TypeError('Expected a String');
}
return str
.replace(/&#(\d+);?/g, function (_, code) {
return punycode.ucs2.encode([code]);
})
.replace(/&#[xX]([A-Fa-f0-9]+);?/g, function (_, hex) {
return punycode.ucs2.encode([parseInt(hex, 16)]);
})
.replace(/&([^;\W]+;?)/g, function (m, e) {
var ee = e.replace(/;$/, '');
var target = entities[e]
|| (e.match(/;$/) && entities[ee])
;
if (typeof target === 'number') {
return punycode.ucs2.encode([target]);
}
else if (typeof target === 'string') {
return target;
}
else {
return m;
}
})
;
};
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