/**
 * Session store system main include file
 *
 * Created on 2019/07/13.
 */

#ifndef HTTPD_UTILS_SESSION_H
#define HTTPD_UTILS_SESSION_H

#include "session_kvmap.h"
#include "session_store.h"

// Customary keys

/** Session key for OK flash message */
#define SESS_FLASH_OK "flash_ok"
/** Session key for error flash message */
#define SESS_FLASH_ERR "flash_err"
/** Session key for a "logged in" flag. Value is 1 if logged in. */
#define SESS_AUTHED "authed"

// ..

/**
 * Redirect to /login form if unauthed,
 * but also retrieve the session key-value store for further use
 */
#define HTTP_GET_AUTHED_SESSION(kvstore, r) do {                            \
    kvstore = httpd_req_find_session_and((r), SESS_GET_DATA);               \
    if (NULL == kvstore || NULL == sess_kv_map_get(kvstore, SESS_AUTHED)) { \
        return httpd_redirect_to((r), "/login");                            \
    }                                                                       \
} while(0)

/**
 * Start or resume a session without checking for authed status.
 * When started, the session cookie is added to the response immediately.
 *
 * @param[out] kvstore - a place to store the allocated or retrieved session kvmap
 * @param[in] r - request
 * @return success
 */
esp_err_t HTTP_GET_SESSION(sess_kv_map_t **kvstore, httpd_req_t *r);

/**
 * Redirect to the login form if unauthed.
 * This is the same as `HTTP_GET_AUTHED_SESSION`, except the kvstore variable is
 * not needed in the uri handler calling this, so it is declared internally.
 */
#define HTTP_REDIRECT_IF_UNAUTHED(r) do {                             \
    sess_kv_map_t *_kvstore;                                          \
    HTTP_GET_AUTHED_SESSION(_kvstore, r);                             \
} while(0)

#endif // HTTPD_UTILS_SESSION_H