mirror of
https://github.com/owntracks/recorder.git
synced 2024-11-15 18:08:28 -07:00
95 lines
2.9 KiB
C
95 lines
2.9 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include "json.h"
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#include "udata.h"
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#include "fences.h"
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#include "gcache.h"
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#include "util.h"
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#ifdef WITH_LUA
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# include "hooks.h"
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#endif
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/*
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* OwnTracks Recorder
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* Copyright (C) 2015-2020 Jan-Piet Mens <jpmens@gmail.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/*
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* lat/lon are the position that has been reported by the device as it is at
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* now, and wp contains the point read from the list of waypoints. Calculate
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* distance betwee the two, and if that's less than waypoint radius, user is
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* now IN the geofence, else OUT of the geofence. Indicate transition by
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* changing IO in wp and telling caller to store.
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*/
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static int check_a_waypoint(char *key, wpoint *wp, double lat, double lon)
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{
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double dist;
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bool rewrite = false;
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dist = haversine_dist(wp->lat, wp->lon, lat, lon);
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// printf("WP= rad=%ld, io=%d, dist=%lf %s\n", wp->rad, wp->io, dist, wp->desc);
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if (dist < wp->rad) {
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// printf("YEAH: key(%s)\n", key);
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if (wp->io == false) {
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wp->event = ENTER;
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wp->io = true;
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rewrite = true;
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}
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} else if (wp->io == true) {
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wp->event = LEAVE;
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wp->io = false;
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rewrite = true;
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}
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if (rewrite) {
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// printf("%s - %s: EVENT == %s\n", wp->user, wp->device, wp->event == 0 ? "ENTER" : "LEAVE");
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#ifdef WITH_LUA
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if (wp->ud->luadata) {
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hooks_transition(wp->ud, wp->user, wp->device, wp->event, wp->desc, wp->lat, wp->lon, lat, lon, wp->topic, wp->json, (long)dist);
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}
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#endif /* WITH_LUA */
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}
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return (rewrite);
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}
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/*
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* Every time a position is obtained, calculate the distance to the center
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* of each geofence and check whether that distance is less than the radius
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* of the geofence. If the distance is <= to the radius, the obtained position
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* is considered to be inside the geofence. This position is calculated using
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* the Haversine formula.
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*/
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void check_fences(struct udata *ud, char *username, char *device, double lat, double lon, JsonNode *json, char *topic)
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{
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static UT_string *userdev;
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utstring_renew(userdev);
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utstring_printf(userdev, "%s-%s", username, device);
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/*
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* For each of this user's geofences (username-device-*) obtain lat/lon/rad
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* and do as described above.
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*/
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gcache_enum(username, device, ud->wpdb, UB(userdev), check_a_waypoint, lat, lon, ud, topic, json);
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}
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