Initial code check-inicefish_8.99.5icefish_8.99.4icefish_8.99.3icefish_8.99.2icefish_8.99.1icefish/8.99.5icefish/8.99.4icefish/8.99.3icefish/8.99.2icefish/8.99.1halibut_8.0.6halibut_8.0.5halibut_8.0.4halibut_8.0.3halibut_8.0.2halibut_8.0.1halibut_8.0.0halibut_7.99.3halibut_7.99.2halibut_7.99.1halibut/8.0.6halibut/8.0.5halibut/8.0.4halibut/8.0.3halibut/8.0.2halibut/8.0.1halibut/8.0.0halibut/7.99.3halibut/7.99.2halibut/7.99.18.99.58.99.48.99.38.99.28.99.18.0.68.0.58.0.48.0.38.0.28.0.18.0.07.99.37.99.27.99.1halibut

A simple telematics demo application for AGL.  It reads vehicle and
engine speed from the CAN low-level binding and publishes them via
MQTT.

Change-Id: Ib85904e87919053cad1215b3f53cee81db25c94a
Signed-off-by: Scott Murray <scott.murray@konsulko.com>

1 files changed, 86 insertions, 0 deletions

diff --git a/app/event.cpp b/app/event.cpp
new file mode 100644
index 0000000..8b2d5b6
--- /dev/null
+++ b/app/event.cpp
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2019 Konsulko Group
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ */
+
+#include "event.h"
+#include "gps.h"
+#include "network.h"
+#include <string>
+#include <iostream>
+#include <json-c/json.h>
+#include <time.h>
+
+static uint64_t last_vehicle_speed_update_usecs;
+static uint64_t last_engine_speed_update_usecs;
+
+void process_event(Configuration &config, AfbClient &afbclient, MqttClient &mqttclient, event_data *event)
+{
+	std::string topic("agl-telematics-demo/");
+	topic += event->name;
+	struct json_object *j_obj = json_object_new_object();
+	struct json_object *j_device = json_object_new_string(config.getDeviceUUID().c_str());
+	json_object_object_add(j_obj, "device", j_device);
+	struct json_object *j_val = json_object_new_int(event->value);
+	json_object_object_add(j_obj, "value", j_val);
+	struct json_object *j_ts = json_object_new_int64(event->timestamp);
+	json_object_object_add(j_obj, "timestamp", j_ts);
+
+	location_data location;
+	struct json_object *j_location = json_object_new_object();
+	if(config.isGpsEnabled() && get_location(config, afbclient, &location)) {
+		struct json_object *j_latitude = json_object_new_double(location.latitude);
+		json_object_object_add(j_location, "latitude", j_latitude);
+		struct json_object *j_longitude = json_object_new_double(location.longitude);
+		json_object_object_add(j_location, "longitude", j_longitude);
+		struct json_object *j_speed = json_object_new_int(location.speed);
+		json_object_object_add(j_location, "speed", j_speed);
+		struct json_object *j_track = json_object_new_int(location.track);
+		json_object_object_add(j_location, "track", j_track);
+		struct json_object *j_timestamp = json_object_new_string(location.timestamp.c_str());
+		json_object_object_add(j_location, "timestamp", j_timestamp);
+	}
+	json_object_object_add(j_obj, "location", j_location);
+
+	std::string msg(json_object_to_json_string_ext(j_obj, JSON_C_TO_STRING_SPACED | JSON_C_TO_STRING_PRETTY));
+	if(config.getLogLevel() > 1) {
+		std::cerr << __FUNCTION__ << ": topic = " << topic << ", msg = " << msg << std::endl;
+	}
+
+	struct timespec now;
+	clock_gettime(CLOCK_MONOTONIC_RAW, &now);
+	uint64_t now_usecs = now.tv_sec * 1000000 + now.tv_nsec / 1000;
+	uint64_t *past_usecs = NULL;
+	if(event->name == "vehicle.speed")
+		past_usecs = &last_vehicle_speed_update_usecs;
+	else if(event->name == "engine.speed")
+		past_usecs = &last_engine_speed_update_usecs;
+	if(!config.getUpdatePeriod() ||
+	   past_usecs &&
+	   (!*past_usecs ||
+	    ((now_usecs - *past_usecs) > (config.getUpdatePeriod() * 1000000)))) {
+		int rc = -1;
+		if(config.getCheckOnline() && check_online(afbclient)) {
+			goto skip_update;
+		}
+		rc = mqttclient.publish(topic, msg, config.getMqttQos(), config.getMqttRetain());
+		if(rc != MOSQ_ERR_SUCCESS) {
+			std::cerr << __FUNCTION__ << ": MQTT publish failed, rc = " << rc << std::endl;
+		} else if(config.getLogLevel() > 0) {
+			std::cerr << __FUNCTION__ << ": MQTT publish succeeded" << std::endl;
+		}
+skip_update:
+		*past_usecs = now_usecs;
+	}
+}