Process url for cip6791

gistfile1.js

var exampleInputs = [
    "http://example.com/",
    "http://example.com/#hash",
    "http://example.com/#hash?something=hello",
    "http://example.com/#hash?something=hello&else=hi"
];

function getHashValueFrom(url, hashIndex, queryStringIndex) {
    if (hashIndex === -1) {
        return "";
    }

    if (queryStringIndex === -1) {
        return url.substr(hashIndex + 1);
    }

    return url.substring(hashIndex + 1, queryStringIndex);
}

function getQueryStringFrom(url, hashIndex, queryStringIndex) {
    if (queryStringIndex === -1) {
        return {};
    }

    return url.substr(queryStringIndex + 1).split("&").reduce(function(result, current) {
        var keyValuePair = current.split("=");
        result[keyValuePair[0]] = keyValuePair[1];
        return result;
    }, {});
}

function getStateFrom(url) {
    var queryStringIndex = url.lastIndexOf("?");
    var hashIndex = url.lastIndexOf("#");

    return {
        hash: getHashValueFrom(url, hashIndex, queryStringIndex),
        queryString: getQueryStringFrom(url, hashIndex, queryStringIndex)
    }
}

exampleInputs.forEach(function(url) {
    console.log(getStateFrom(url));
});

Output:

$ node process-qs.js
{ hash: '', queryString: {} }
{ hash: 'hash', queryString: {} }
{ hash: 'hash', queryString: { something: 'hello' } }
{ hash: 'hash',
  queryString: { something: 'hello', else: 'hi' } }