Class ParamSeekHandler

src/io/param-seek-handler.js:19–83

 */

class ParamSeekHandler {

    constructor(paramStart, paramEnd) {
        this._startName = paramStart;
        this._endName = paramEnd;
    }

    getConfig(baseUrl, range) {
        let url = baseUrl;

        if (range.from !== 0 || range.to !== -1) {
            let needAnd = true;
            if (url.indexOf('?') === -1) {
                url += '?';
                needAnd = false;
            }

            if (needAnd) {
                url += '&';
            }

            url += `${this._startName}=${range.from.toString()}`;

            if (range.to !== -1) {
                url += `&${this._endName}=${range.to.toString()}`;
            }
        }

        return {
            url: url,
            headers: {}
        };
    }

    removeURLParameters(seekedURL) {
        let baseURL = seekedURL.split('?')[0];
        let params = undefined;

        let queryIndex = seekedURL.indexOf('?');
        if (queryIndex !== -1) {
            params = seekedURL.substring(queryIndex + 1);
        }

        let resultParams = '';

        if (params != undefined && params.length > 0) {
            let pairs = params.split('&');

            for (let i = 0; i < pairs.length; i++) {
                let pair = pairs[i].split('=');
                let requireAnd = (i > 0);

                if (pair[0] !== this._startName && pair[0] !== this._endName) {
                    if (requireAnd) {
                        resultParams += '&';
                    }
                    resultParams += pairs[i];
                }