/*****************************************************************************\
 *  http_router.h - Route HTTP requests
 *****************************************************************************
 *  Copyright (C) SchedMD LLC.
 *
 *  This file is part of Slurm, a resource management program.
 *  For details, see <https://slurm.schedmd.com/>.
 *  Please also read the included file: DISCLAIMER.
 *
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\*****************************************************************************/

#ifndef SLURM_HTTP_ROUTER_H
#define SLURM_HTTP_ROUTER_H

#include "src/common/http.h"
#include "src/common/http_con.h"

/*
 * Called on bound HTTP request and headers and content received
 * @see http_con_server_events_t::on_request()
 * IN hcon - pointer to http connection
 * IN name - connection name for logging
 * IN request - pointer to parsed request
 * IN arg - arbitrary pointer handed to http_con_assign_server()
 * IN path_arg - arbitrary pointer handed to http_router_bind()
 * RET SLURM_SUCCESS to continue parsing to error to stop
 */
typedef int (*http_router_on_request_event_t)(http_con_t *hcon,
					      const char *name,
					      const http_con_request_t *request,
					      void *arg, void *path_arg);

/*
 * Callback to cleanup path_arg during http_router_fini()
 * IN on_request - on_request callback for path being freed
 * IN path_arg - arbitrary pointer passed to http_router_bind()
 */
typedef void (*http_router_on_fini)(http_router_on_request_event_t on_request,
				    void *path_arg);

/*
 * Initialize HTTP router
 * IN on_not_found - callback for when request doesn't match any bound paths
 */
extern void http_router_init(http_router_on_request_event_t on_not_found);

/* Cleanup HTTP router */
extern void http_router_fini(void);

/*
 * Bind to path in HTTP router
 * IN hrouter - http router to bind path events
 * IN method - HTTP method to bind at path
 * IN path - string HTTP URL path to bind
 * IN on_request - callbacks for on_request() event
 * IN on_fini - callbacks to cleanup path_arg from http_router_fini();
 * IN path_arg - arbitrary pointer to pass to on_request()
 */
extern void http_router_bind(http_request_method_t method, const char *path,
			     http_router_on_request_event_t on_request,
			     http_router_on_fini on_fini, void *path_arg);

/* Callback to have HTTP router match method and path to a bound callback */
extern int http_router_on_request(http_con_t *hcon, const char *name,
				  const http_con_request_t *request, void *arg);

#endif
