@twurple/api-call/lib/helpers/url.js

A light wrapper around the Twitch API.

import { getMockApiPort } from '@twurple/common';
/** @internal */
export function getTwitchApiUrl(url, type) {
    const mockServerPort = getMockApiPort();
    switch (type) {
        case 'helix': {
            const unprefixedUrl = url.replace(/^\//, '');
            return mockServerPort
                ? unprefixedUrl === 'eventsub/subscriptions'
                    ? `http://localhost:${mockServerPort}/${unprefixedUrl}`
                    : `http://localhost:${mockServerPort}/mock/${unprefixedUrl}`
                : `https://api.twitch.tv/helix/${unprefixedUrl}`;
        }
        case 'auth': {
            const unprefixedUrl = url.replace(/^\//, '');
            return mockServerPort
                ? `http://localhost:${mockServerPort}/auth/${unprefixedUrl}`
                : `https://id.twitch.tv/oauth2/${unprefixedUrl}`;
        }
        case 'custom':
            return url;
        default:
            return url; // wat
    }
}