getEnvParameter.ts

import { RunTypes } from '../components/codecamp/common/CodeCampInterfaces';
import getConfig from 'next/config';
const { publicRuntimeConfig } = getConfig();

/** A function that when called will return an environmental variable
 * specified either in the .env file or the next.config.js defaults
 * @param envKey value passed in which is environmental value without_DEV,_PROD or _STAGING
 * @param devProdOrStaging
 * @devProdOrStaging can only be "DEV","PROD", or "STAGING". If not included, then will default to process_env.NODE_ENV
 * @returns returns the value after evaluating based on process.env.NODE_ENV
 * */
const getEnvParameter = (envKey: string, devProdOrStaging?: RunTypes) => {
    if (!devProdOrStaging) {
        if (process.env.NODE_ENV === 'production') {
            devProdOrStaging = 'PROD';
        } else if (process.env.NODE_ENV === 'development') {
            devProdOrStaging = 'DEV';
        } else if (process.env.NODE_ENV === 'staging') {
            devProdOrStaging = 'STAGING';
        }
    }

    const baseUrl = `BASEURL_${devProdOrStaging}`;
    let baseUrlValue = process.env[baseUrl];
    if (!baseUrlValue) {
        baseUrlValue = publicRuntimeConfig[`BASEURL_DEFAULT`];
    }

    if (!baseUrlValue) {
        baseUrlValue = publicRuntimeConfig[`BASEURL_DEFAULT`];
    }

    const envKeyValue = `${envKey}_${devProdOrStaging}`;
    const keyValue = process.env[envKeyValue];

    const retVal = keyValue
        ? `${baseUrlValue}${keyValue}`
        : baseUrlValue + publicRuntimeConfig[`${envKey}_DEFAULT`];
    return retVal;
};

export default getEnvParameter;