react-native-dialogflow-som/js/googleAuth/postAsForm.js

A React-Native Bridge for the Google Dialogflow SDK with resetContext working

export default async function postAsForm(url, data) {
    var response;
    try {

        //array that holds the items that get added into the form
        var form = [];

        //special handling for object/array data, arrays will use "model" as the container ns
        addItemsToForm(form, typeof data == 'object' ? [] : [options.name || 'model'], data);

        //you'll need to await on response.text/blob/json etc
        var response = await fetch(url, {
            method: 'post',
            headers: {
                'Accept': 'application/json, application/xml, text/play, text/html, *.*',
                'Content-Type': 'application/x-www-form-urlencoded; charset=utf-8'
            },
            body: form.join('&')
        });

        //return plain text as-is, don't parse it here
        return await response.text();
    } catch (err) {
        //console.error("Error from server:", err && err.stack || err);
        err.response = response;
        throw err;
    }
}

function addItemsToForm(form, names, obj) {
    if (obj === undefined || obj === "" || obj === null) return addItemToForm(form, names, "");

    if (
        typeof obj == "string"
        || typeof obj == "number"
        || obj === true
        || obj === false
    ) return addItemToForm(form, names, obj);

    if (obj instanceof Date) return addItemToForm(form, names, obj.toJSON());

    // array or otherwise array-like
    if (obj instanceof Array) {
        return obj.forEach((v, i) => {
            names.push(`[${i}]`);
            addItemsToForm(form, names, v);
            names.pop();
        });
    }

    if (typeof obj === "object") {
        return Object.keys(obj).forEach((k) => {
            names.push(k);
            addItemsToForm(form, names, obj[k]);
            names.pop();
        });
    }
}

function addItemToForm(form, names, value) {
    var name = encodeURIComponent(names.join('.').replace(/\.\[/g, '['));
    value = encodeURIComponent(value.toString());
    form.push(`${name}=${value}`);
}