@tech-arelius/api-client/src/session/SessionProvider.ts

Configurable HTTP client with builder pattern for Node.js/TypeScript

/**
 * Authorization types supported by the API client
 */
export enum AuthorizationType {
  BEARER = 'Bearer',
  BASIC = 'Basic',
  OAUTH = 'OAuth',
  CUSTOM = 'Custom'
}

/**
 * Session provider interface for authentication
 */
export abstract class SessionProvider {
  constructor(protected authorizationType: AuthorizationType = AuthorizationType.BEARER) {}

  /**
   * Get the authorization token
   */
  abstract getToken(): Promise<string | null>;

  /**
   * Get the authorization type
   */
  getAuthorizationType(): AuthorizationType {
    return this.authorizationType;
  }

  /**
   * Generate the full authorization header value
   */
  async getAuthorizationHeader(): Promise<string | null> {
    const token = await this.getToken();
    if (!token) return null;

    switch (this.authorizationType) {
      case AuthorizationType.BEARER:
        return `Bearer ${token}`;
      case AuthorizationType.BASIC:
        return `Basic ${token}`;
      case AuthorizationType.OAUTH:
        return `OAuth ${token}`;
      case AuthorizationType.CUSTOM:
        return token;
      default:
        return `Bearer ${token}`;
    }
  }
}