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