esp-ena/components/ena/include/ena-beacons.h

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// Copyright 2020 Lukas Haubaum
//
// Licensed under the GNU Affero General Public License, Version 3;
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// https://www.gnu.org/licenses/agpl-3.0.html
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/**
* @file
*
* @brief handles scanned data by storing temporary beacons, check for threshold and store beacons permanently
*
*/
#ifndef _ena_BEACON_H_
#define _ena_BEACON_H_
#define ENA_BEACON_LOG "ESP-ENA-beacon" // TAG for Logging
#define ENA_BEACON_TRESHOLD (CONFIG_ENA_BEACON_TRESHOLD) // meet for longer than 5 minutes
#define ENA_BEACON_CLEANUP_TRESHOLD (CONFIG_ENA_BEACON_CLEANUP_TRESHOLD) // threshold (in days) for stored beacons to be removed
/**
* @brief check temporary beacon for threshold or expiring
*
* This function checks all current temporary beacons if the contact threshold is
* reached or if the temporary contact can be discarded.
*
* @param[in] unix_timestamp current time as UNIX timestamp to compare
*
*/
void ena_beacons_temp_refresh(uint32_t unix_timestamp);
/**
* @brief check stored beacons to expire
*
* This function checks for all stored beacons if the last timestamp is over a threshold to remove the beacon.
*
* @param[in] unix_timestamp current time as UNIX timestamp to compate
*
*/
void ena_beacons_cleanup(uint32_t unix_timestamp);
/**
* @brief handle new beacon received from a BLE scan
*
* This function gets called when a running BLE scan received a new ENA payload.
* On already detected RPI this will update just the timestamp and RSSI.
*
* @param[in] unix_timestamp UNIX timestamp when beacon was made
* @param[in] rpi received RPI from scanned payload
* @param[in] aem received AEM from scanned payload
* @param[in] rssi measured RSSI on scan
*
*/
void ena_beacon(uint32_t unix_timestamp, uint8_t *rpi, uint8_t *aem, int rssi);
#endif