/**
* mds — A micro-display server
* Copyright © 2014, 2015, 2016, 2017 Mattias Andrée (maandree@kth.se)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MDS_MDS_SERVER_INTERCEPTORS_H
#define MDS_MDS_SERVER_INTERCEPTORS_H
#include "interception-condition.h"
#include "client.h"
#include "queued-interception.h"
#include <stddef.h>
#include <stdint.h>
/**
* Add an interception condition for a client
*
* @param client The client
* @param condition The header, optionally with value, to look for, or empty (not NULL) for all messages
* @param priority Interception priority
* @param modifying Whether the client may modify the messages
* @param stop Whether the condition should be removed rather than added
*/
__attribute__((nonnull))
void add_intercept_condition(client_t *client, char *condition, int64_t priority, int modifying, int stop);
/**
* Check if a condition matches any of a set of accepted patterns
*
* @param cond The condition
* @param hashes The hashes of the accepted header names
* @param keys The header names
* @param headers The header name–value pairs
* @param count The number of accepted patterns
* @return Evaluates to true if and only if a matching pattern was found
*/
__attribute__((pure, nonnull(1)))
int is_condition_matching(interception_condition_t *cond, size_t *hashes,
char **keys, char **headers, size_t count);
/**
* Find a matching condition to any of a set of acceptable conditions
*
* @param client The intercepting client
* @param hashes The hashes of the accepted header names
* @param keys The header names
* @param headers The header name–value pairs
* @param count The number of accepted patterns
* @param interception_out Storage slot for found interception
* @return -1 on error, otherwise: evalutes to true iff a matching condition was found
*/
__attribute__((pure, nonnull(1, 6)))
int find_matching_condition(client_t *client, size_t *hashes, char **keys, char **headers,
size_t count, queued_interception_t *interception_out);
/**
* Get all interceptors who have at least one condition matching any of a set of acceptable patterns
*
* @param sender The original sender of the message
* @param hashes The hashes of the accepted header names
* @param keys The header names
* @param headers The header name–value pairs
* @param count The number of accepted patterns
* @param interceptions_count_out Slot at where to store the number of found interceptors
* @return The found interceptors, `NULL` on error
*/
__attribute__((pure, nonnull(1, 6)))
queued_interception_t *get_interceptors(client_t *sender, size_t *hashes, char **keys, char **headers,
size_t count, size_t *interceptions_count_out);
#endif
