authelia/web/src/services/Configuration.ts

import { Configuration } from "@models/Configuration";
import { ConfigurationPath } from "@services/Api";
import { Get } from "@services/Client";
import { toEnum, Method2FA } from "@services/UserPreferences";

interface ConfigurationPayload {
    available_methods: Method2FA[];
    second_factor_enabled: boolean;
    totp_period: number;
}

export async function getConfiguration(): Promise<Configuration> {
    const config = await Get<ConfigurationPayload>(ConfigurationPath);
    return { ...config, available_methods: new Set(config.available_methods.map(toEnum)) };
}