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var entityMap = require("../maps/entities.json"),
legacyMap = require("../maps/legacy.json"),
xmlMap = require("../maps/xml.json"),
decodeCodePoint = require("./decode_codepoint.js");
var decodeXMLStrict = getStrictDecoder(xmlMap),
decodeHTMLStrict = getStrictDecoder(entityMap);
function getStrictDecoder(map) {
var keys = Object.keys(map).join("|"),
replace = getReplacer(map);
keys += "|#[xX][\\da-fA-F]+|#\\d+";
var re = new RegExp("&(?:" + keys + ");", "g");
return function(str) {
return String(str).replace(re, replace);
};
}
var decodeHTML = (function() {
var legacy = Object.keys(legacyMap).sort(sorter);
var keys = Object.keys(entityMap).sort(sorter);
for (var i = 0, j = 0; i < keys.length; i++) {
if (legacy[j] === keys[i]) {
keys[i] += ";?";
j++;
} else {
keys[i] += ";";
}
}
var re = new RegExp("&(?:" + keys.join("|") + "|#[xX][\\da-fA-F]+;?|#\\d+;?)", "g"),
replace = getReplacer(entityMap);
function replacer(str) {
if (str.substr(-1) !== ";") str += ";";
return replace(str);
}
//TODO consider creating a merged map
return function(str) {
return String(str).replace(re, replacer);
};
})();
function sorter(a, b) {
return a < b ? 1 : -1;
}
function getReplacer(map) {
return function replace(str) {
if (str.charAt(1) === "#") {
if (str.charAt(2) === "X" || str.charAt(2) === "x") {
return decodeCodePoint(parseInt(str.substr(3), 16));
}
return decodeCodePoint(parseInt(str.substr(2), 10));
}
return map[str.slice(1, -1)];
};
}
module.exports = {
XML: decodeXMLStrict,
HTML: decodeHTML,
HTMLStrict: decodeHTMLStrict
};
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