//! OAuth2 authentication module for email providers.
//!
//! Supports OAuth2 with PKCE for secure token exchange without client secrets.
//! Implements a generic provider system for multiple email services:
//! - Fastmail (JMAP API)
//! - Google/Gmail (Gmail API or IMAP via XOAUTH2)
//! - Microsoft/Outlook (Microsoft Graph or IMAP via XOAUTH2)

pub mod callback_server;
pub mod credentials;
pub mod provider;
pub mod providers;
pub mod token_manager;

pub use callback_server::OAuthCallbackServer;
pub use credentials::{CredentialStore, OAuthCredentials};
pub use provider::{OAuthProvider, OAuthProviderConfig, OAuthStartResult, TokenResult};
pub use providers::*;
pub use token_manager::TokenManager;