busy-web/components

import { set, get } from '@ember/object';

function addQueryStringPair(params, key, value) {
    if (/\[.+\]/.test(key)) { // parse type: `key[subkey]=value`
        let [ normalizeKey, subKey ] = key.split('[');
        subKey = subKey.split(']').join('');
        let obj = get(params, normalizeKey) || {};

        // NOTE:
        // for keys formatted like `key[subkey][]=value`
        // the key will be parsed correctly in that
        // at this part of the code we will have `subkey[]=value`
        // therefore recursively calling addQueryStringPair will parse
        // this in the following `else if` statment
        addQueryStringPair(obj, subKey, value);

        // after recursively calling addQueryStringPair
        // then the new obj can be added to the original params
        set(params, normalizeKey, obj);
    } else if (/\[\]$/.test(key)) { // parse type: `key[]=value`
        let normalizeKey = key.substring(key.length - 2, 0);
        let arr = get(params, normalizeKey) || [];
        arr.push(value);
        addQueryStringPair(params, normalizeKey, arr);
    } else {
        // normal key pair just add to params
        set(params, key, typeCast(value));
    }
}

function typeCast(value) {
    if (/^[.][\d]+/.test(value)) {
        return typeCast(0 + value);
    }

    if (value === '') {
        return null;
    } else if (value === 'true') {
        return true;
    } else if (value === 'false') {
        return false;
    } else if (/[\d]+[.]?[\d]*/.test(value)) {
        let val = parseInt(value, 10);
        if (`${val}` === value) {
            return val;
        } else {
            val = parseFloat(value);
            if (`${val}` === value) {
                return val;
            }
        }
    }
    return value;
}

export default function parse(query) {
    let data = {};
    if (query && query.length) {
        const params = query.split('&');
        params.forEach(item => {
            let [ key, value ] = item.split('=');
            value = decodeURIComponent(value);
            addQueryStringPair(data, key, value);
        });
    }
    return data;
}