32 lines
1 KiB
JavaScript
Executable file
32 lines
1 KiB
JavaScript
Executable file
var punycode = require('punycode');
|
|
var entities = require('./entities.json');
|
|
|
|
module.exports = decode;
|
|
|
|
function decode (str) {
|
|
if (typeof str !== 'string') {
|
|
throw new TypeError('Expected a String');
|
|
}
|
|
|
|
return str.replace(/&(#?[^;\W]+;?)/g, function (_, match) {
|
|
var m;
|
|
if (m = /^#(\d+);?$/.exec(match)) {
|
|
return punycode.ucs2.encode([ parseInt(m[1], 10) ]);
|
|
} else if (m = /^#[Xx]([A-Fa-f0-9]+);?/.exec(match)) {
|
|
return punycode.ucs2.encode([ parseInt(m[1], 16) ]);
|
|
} else {
|
|
// named entity
|
|
var hasSemi = /;$/.test(match);
|
|
var withoutSemi = hasSemi ? match.replace(/;$/, '') : match;
|
|
var target = entities[withoutSemi] || (hasSemi && entities[match]);
|
|
|
|
if (typeof target === 'number') {
|
|
return punycode.ucs2.encode([ target ]);
|
|
} else if (typeof target === 'string') {
|
|
return target;
|
|
} else {
|
|
return '&' + match;
|
|
}
|
|
}
|
|
});
|
|
}
|