dynatrace-cordova-outsystems-plugin/node_modules/qs/lib/stringify.js

This plugin gives you the ability to use the Dynatrace instrumentation in your hybrid application (Cordova, Ionic, ..). It uses the Mobile Agent, the JavaScript Agent and the Javascript Bridge. The Mobile Agent will give you all device specific values con

'use strict';

var utils = require('./utils');
var formats = require('./formats');

var arrayPrefixGenerators = {
    brackets: function brackets(prefix) { // eslint-disable-line func-name-matching
        return prefix + '[]';
    },
    indices: function indices(prefix, key) { // eslint-disable-line func-name-matching
        return prefix + '[' + key + ']';
    },
    repeat: function repeat(prefix) { // eslint-disable-line func-name-matching
        return prefix;
    }
};

var toISO = Date.prototype.toISOString;

var defaults = {
    delimiter: '&',
    encode: true,
    encoder: utils.encode,
    encodeValuesOnly: false,
    serializeDate: function serializeDate(date) { // eslint-disable-line func-name-matching
        return toISO.call(date);
    },
    skipNulls: false,
    strictNullHandling: false
};

var stringify = function stringify( // eslint-disable-line func-name-matching
    object,
    prefix,
    generateArrayPrefix,
    strictNullHandling,
    skipNulls,
    encoder,
    filter,
    sort,
    allowDots,
    serializeDate,
    formatter,
    encodeValuesOnly
) {
    var obj = object;
    if (typeof filter === 'function') {
        obj = filter(prefix, obj);
    } else if (obj instanceof Date) {
        obj = serializeDate(obj);
    } else if (obj === null) {
        if (strictNullHandling) {
            return encoder && !encodeValuesOnly ? encoder(prefix, defaults.encoder) : prefix;
        }

        obj = '';
    }

    if (typeof obj === 'string' || typeof obj === 'number' || typeof obj === 'boolean' || utils.isBuffer(obj)) {
        if (encoder) {
            var keyValue = encodeValuesOnly ? prefix : encoder(prefix, defaults.encoder);
            return [formatter(keyValue) + '=' + formatter(encoder(obj, defaults.encoder))];
        }
        return [formatter(prefix) + '=' + formatter(String(obj))];
    }

    var values = [];

    if (typeof obj === 'undefined') {
        return values;
    }

    var objKeys;
    if (Array.isArray(filter)) {
        objKeys = filter;
    } else {
        var keys = Object.keys(obj);
        objKeys = sort ? keys.sort(sort) : keys;
    }

    for (var i = 0; i < objKeys.length; ++i) {
        var key = objKeys[i];

        if (skipNulls && obj[key] === null) {
            continue;
        }

        if (Array.isArray(obj)) {
            values = values.concat(stringify(
                obj[key],
                generateArrayPrefix(prefix, key),
                generateArrayPrefix,
                strictNullHandling,
                skipNulls,
                encoder,
                filter,
                sort,
                allowDots,
                serializeDate,
                formatter,
                encodeValuesOnly
            ));
        } else {
            values = values.concat(stringify(
                obj[key],
                prefix + (allowDots ? '.' + key : '[' + key + ']'),
                generateArrayPrefix,
                strictNullHandling,
                skipNulls,
                encoder,
                filter,
                sort,
                allowDots,
                serializeDate,
                formatter,
                encodeValuesOnly
            ));
        }
    }

    return values;
};

module.exports = function (object, opts) {
    var obj = object;
    var options = opts ? utils.assign({}, opts) : {};

    if (options.encoder !== null && options.encoder !== undefined && typeof options.encoder !== 'function') {
        throw new TypeError('Encoder has to be a function.');
    }

    var delimiter = typeof options.delimiter === 'undefined' ? defaults.delimiter : options.delimiter;
    var strictNullHandling = typeof options.strictNullHandling === 'boolean' ? options.strictNullHandling : defaults.strictNullHandling;
    var skipNulls = typeof options.skipNulls === 'boolean' ? options.skipNulls : defaults.skipNulls;
    var encode = typeof options.encode === 'boolean' ? options.encode : defaults.encode;
    var encoder = typeof options.encoder === 'function' ? options.encoder : defaults.encoder;
    var sort = typeof options.sort === 'function' ? options.sort : null;
    var allowDots = typeof options.allowDots === 'undefined' ? false : options.allowDots;
    var serializeDate = typeof options.serializeDate === 'function' ? options.serializeDate : defaults.serializeDate;
    var encodeValuesOnly = typeof options.encodeValuesOnly === 'boolean' ? options.encodeValuesOnly : defaults.encodeValuesOnly;
    if (typeof options.format === 'undefined') {
        options.format = formats['default'];
    } else if (!Object.prototype.hasOwnProperty.call(formats.formatters, options.format)) {
        throw new TypeError('Unknown format option provided.');
    }
    var formatter = formats.formatters[options.format];
    var objKeys;
    var filter;

    if (typeof options.filter === 'function') {
        filter = options.filter;
        obj = filter('', obj);
    } else if (Array.isArray(options.filter)) {
        filter = options.filter;
        objKeys = filter;
    }

    var keys = [];

    if (typeof obj !== 'object' || obj === null) {
        return '';
    }

    var arrayFormat;
    if (options.arrayFormat in arrayPrefixGenerators) {
        arrayFormat = options.arrayFormat;
    } else if ('indices' in options) {
        arrayFormat = options.indices ? 'indices' : 'repeat';
    } else {
        arrayFormat = 'indices';
    }

    var generateArrayPrefix = arrayPrefixGenerators[arrayFormat];

    if (!objKeys) {
        objKeys = Object.keys(obj);
    }

    if (sort) {
        objKeys.sort(sort);
    }

    for (var i = 0; i < objKeys.length; ++i) {
        var key = objKeys[i];

        if (skipNulls && obj[key] === null) {
            continue;
        }

        keys = keys.concat(stringify(
            obj[key],
            key,
            generateArrayPrefix,
            strictNullHandling,
            skipNulls,
            encode ? encoder : null,
            filter,
            sort,
            allowDots,
            serializeDate,
            formatter,
            encodeValuesOnly
        ));
    }

    var joined = keys.join(delimiter);
    var prefix = options.addQueryPrefix === true ? '?' : '';

    return joined.length > 0 ? prefix + joined : '';
};