atlasconsulting / bedita-sdk-js

import { AxiosRequestConfig } from 'axios';

import { GrantType } from '../bedita-api-client';

import RequestInterceptor from './request-interceptor';

/**

 * Auth interceptor.

 * It responsible to add Authorization header if it needs.

 */

export default class AuthInterceptor extends RequestInterceptor {

    /**

     * If present it adds access token to Authorization header.

     *

     * @param config The axios request config

     */

    public async requestHandler(config: AxiosRequestConfig): Promise<AxiosRequestConfig> {

        config = await this.setAuthorizationHeader(config);

        // Authorization header set so go ahead

        if (config.headers?.Authorization) {

            return config;

        }

        // trying client credentials auth so go ahead

        if (config.url === '/auth' && config.data?.grant_type === GrantType.ClientCredentials) {

            return config;

        }

        if (!this.beditaClient.getConfig('clientId')) {

            return config;

        }

        await this.beditaClient.clientCredentials();

        return await this.setAuthorizationHeader(config);

    }

    /**

     * Set Authorization header if not already set and access token is present.

     *

     * @param config The axios request config

     */

    protected async setAuthorizationHeader(config: AxiosRequestConfig): Promise<AxiosRequestConfig> {

        const accessToken = await this.beditaClient.getStorageService().getAccessToken();

        if (accessToken && !config.headers?.Authorization) {

            config.headers.Authorization = `Bearer ${accessToken}`;

        }

        return config;

    }

}