atlasconsulting / bedita-sdk-js

/**

 * 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 requestHandler(config: AxiosRequestConfig): Promise<AxiosRequestConfig> {

        config = this.setAuthorizationHeader(config);

        // Authorization header set so go ahead

        if (config.headers?.Authorization) {

            return Promise.resolve(config);

        }

        // trying client credentials auth so go ahead

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

            return Promise.resolve(config);

        }

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

            return Promise.resolve(config);

        }

        return this.beditaClient

            .clientCredentials()

            .then(() => Promise.resolve(this.setAuthorizationHeader(config)));

    }

    /**

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

     *

     * @param config The axios request config

     */

    protected setAuthorizationHeader(config: AxiosRequestConfig): AxiosRequestConfig {

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

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

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

        }

        return config;