bmsd/ispindels.c

/**
 * @file ispindels.c
 * @brief Handle ispindels data
 * @author Michiel Broek <mbroek at mbse dot eu>
 *
 * Copyright (C) 2019
 *
 * This file is part of the bms (Brewery Management System)
 *
 * This 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 2, or (at your option) any
 * later version.
 *
 * bms 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 ThermFerm; see the file COPYING.  If not, write to the Free
 * Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 */


#include "bms.h"
#include "xutil.h"
#include "ispindels.h"
#include "mysql.h"
#include "nodes.h"


sys_ispindel_list	*ispindels = NULL;

extern int		debug;
extern sys_config       Config;
extern MYSQL		*con;
extern MYSQL_RES	*res_set;
extern MYSQL_ROW	row;


void ispindel_set(char *node, char *key, char *payload)
{
    sys_ispindel_list	*ispindel, *tmpp;
    bool		new_ispindel = true, do_update = false;
    char		*t, *p, *datetime, buf[65], *line, *logfile;
    float		temperature = 20;
    uint8_t		temp_units = 'C';
    struct tm           *mytime;
    time_t              timestamp;
    FILE		*fp;

    fprintf(stdout, "ispindel_set: %s %s\n", node, payload);

    /*
     * Search ispindel record in the memory array and use it if found.
     */
    if (ispindels) {
	for (tmpp = ispindels; tmpp; tmpp = tmpp->next) {
	    if (strcmp(tmpp->node, node) == 0) {
		new_ispindel = false;
		ispindel = tmpp;
		break;
	    }
	}
    }

    printf("new_ispindel %s\n", new_ispindel ? "true":"false");

    /*
     * Allocate new ispindel if not yet known.
     */
    if (new_ispindel) {
	ispindel = (sys_ispindel_list *)malloc(sizeof(sys_ispindel_list));
	memset(ispindel, 0, sizeof(sys_ispindel_list));
	ispindel->node = xstrcpy(node);
    }

    if (! ispindel->online) {
    	ispindel->online = true;
    	syslog(LOG_NOTICE, "Online ispindel %s", node);
    }

    /*
     * Process the simple iSpindel MQTT payload.
     */
    if (strcmp(key, "tilt") == 0) {
	ispindel->tilt = atof(payload);
    } else if (strcmp(key, "temperature") == 0) {
	temperature = atof(payload);
    } else if (strcmp(key, "temp_units") == 0) {
	temp_units = payload[0];
    } else if (strcmp(key, "battery") == 0) {
	ispindel->battery = atof(payload);
    } else if (strcmp(key, "gravity") == 0) {
	ispindel->gravity = atof(payload);
    } else if (strcmp(key, "interval") == 0) {
	ispindel->interval = atoi(payload);
    } else if (strcmp(key, "RSSI") == 0) {
	ispindel->rssi = atoi(payload);
	do_update = true;
	if (temp_units == 'C') {
	    ispindel->temperature = temperature;
	} else if (temp_units == 'F') {
	    ispindel->temperature = temperature / 1.8 - 32;
	} else if (temp_units == 'K') {
	    ispindel->temperature = temperature - 273.15;
	} else {
	    ispindel->temperature = temperature;
	}
    } else {
	syslog(LOG_NOTICE, "Unknown keyword `%s' from `%s'", key, node);
    }

    ispindel_dump(ispindel);

    if (new_ispindel || do_update) {
    	t = xstrcpy((char *)"mbv1.0/ispindels/NBIRTH/");
    	t = xstrcat(t, node);

    	p = xstrcpy((char *)"{\"metric\":{\"properties\":{\"hardwaremake\":\"MBSE\",\"hardwaremodel\":\"Wemos D1 mini\"},\"net\":{\"rssi\":");
    	sprintf(buf, "%d", ispindel->rssi);
	p = xstrcat(p, buf);
    	p = xstrcat(p, (char *)"}}}");
	node_birth_data(t, p);
    	free(t);
    	free(p);
    }

    if (new_ispindel) {
    	if (ispindels == NULL) {
	    ispindels = ispindel;
	} else {
	    for (tmpp = ispindels; tmpp; tmpp = tmpp->next) {
		if (tmpp->next == NULL) {
		    tmpp->next = ispindel;
		    break;
		}
	    }
	}
	ispindel_mysql_insert(ispindel);
    } else if (do_update) {
	ispindel_mysql_update(ispindel);
    }

    /*
     * The data is complete, see if we can write a log entry.
     */
    if (do_update && ispindel->beercode && strlen(ispindel->beercode) && ispindel->beername && strlen(ispindel->beername)) {
	datetime = malloc(72);
	mytime = localtime(&timestamp);
    	snprintf(datetime, 72, "%04d-%02d-%02d %02d:%02d:%02d",
        	mytime->tm_year + 1900, mytime->tm_mon + 1, mytime->tm_mday, mytime->tm_hour, mytime->tm_min, mytime->tm_sec);

	line = xstrcpy(datetime);
    	line = xstrcat(line, (char *)",");
    	snprintf(buf, 64, "%.3f", ispindel->tilt);
    	line = xstrcat(line, buf);
    	line = xstrcat(line, (char *)",");
	snprintf(buf, 64, "%.3f", ispindel->temperature);
        line = xstrcat(line, buf);
        line = xstrcat(line, (char *)",");
	snprintf(buf, 64, "%.3f", ispindel->battery);
        line = xstrcat(line, buf);
        line = xstrcat(line, (char *)",");
	snprintf(buf, 64, "%.3f", ispindel->gravity);
        line = xstrcat(line, buf);
        line = xstrcat(line, (char *)",");
	snprintf(buf, 64, "%d", ispindel->interval);
        line = xstrcat(line, buf);
        line = xstrcat(line, (char *)",");
	snprintf(buf, 64, "%d", ispindel->rssi);
        line = xstrcat(line, buf);

	/*
	 * Build logfile name
	 */
	logfile = xstrcpy(Config.web_root);
	logfile = xstrcat(logfile, (char *)"/log/ispindel/");
	logfile = xstrcat(logfile, ispindel->beercode);
	logfile = xstrcat(logfile, (char *)" ");
	logfile = xstrcat(logfile, ispindel->beername);
	logfile = xstrcat(logfile, (char *)".log");

	fp = fopen(logfile, "a");
	if (fp) {
	    fprintf(fp, "%s\n", line);
	    fclose(fp);
	} else {
	    syslog(LOG_NOTICE, "cannot append to `%s'", logfile);
	}

	free(logfile);
	logfile = NULL;
	free(line);
	line = NULL;
	free(datetime);
	datetime = NULL;
    }
}


/*
 * Process iSpindel MQTT message.
 */
void ispindel_mqtt(char *topic, char *payload)
{
    char		*namespace, *node, *keyword;

    namespace = strtok(topic, "/"); // must be ispindel
    node = strtok(NULL, "/");
    keyword = strtok(NULL, "/\0");

    if (strcmp(namespace, "ispindels")) {
	syslog(LOG_NOTICE, "ispindel_mqtt(%s, %s) error", topic, payload);
	return;
    }

    ispindel_set(node, keyword, payload);
}


void ispindel_dump(sys_ispindel_list *ispindel)
{
    if (debug) {
    	printf("node        %s\n", ispindel->node);
	printf("online      %s\n", ispindel->online ? "yes":"no");
	printf("product     %s / %s\n", ispindel->beercode, ispindel->beername);
        printf("tilt        %.3f\n", ispindel->tilt);
	printf("temperature %.3f\n", ispindel->temperature);
	printf("battery     %.3f\n", ispindel->battery);
	printf("gravity     %.3f\n", ispindel->gravity);
	printf("interval    %d\n", ispindel->interval);
	printf("rssi        %d\n", ispindel->rssi);
    }
}