"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.sanitizeUrl = void 0;
var constants_1 = require("./constants");
function isRelativeUrlWithoutProtocol(url) {
    return constants_1.relativeFirstCharacters.indexOf(url[0]) > -1;
}
// adapted from https://stackoverflow.com/a/29824550/2601552
function decodeHtmlCharacters(str) {
    var removedNullByte = str.replace(constants_1.ctrlCharactersRegex, "");
    return removedNullByte.replace(constants_1.htmlEntitiesRegex, function (match, dec) {
        return String.fromCharCode(dec);
    });
}
function sanitizeUrl(url) {
    if (!url) {
        return constants_1.BLANK_URL;
    }
    var sanitizedUrl = decodeHtmlCharacters(url)
        .replace(constants_1.htmlCtrlEntityRegex, "")
        .replace(constants_1.ctrlCharactersRegex, "")
        .trim();
    if (!sanitizedUrl) {
        return constants_1.BLANK_URL;
    }
    if (isRelativeUrlWithoutProtocol(sanitizedUrl)) {
        return sanitizedUrl;
    }
    var urlSchemeParseResults = sanitizedUrl.match(constants_1.urlSchemeRegex);
    if (!urlSchemeParseResults) {
        return sanitizedUrl;
    }
    var urlScheme = urlSchemeParseResults[0];
    if (constants_1.invalidProtocolRegex.test(urlScheme)) {
        return constants_1.BLANK_URL;
    }
    return sanitizedUrl;
}
exports.sanitizeUrl = sanitizeUrl;