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/*
* Copyright (C) 2016 "IoT.bzh"
* Author Romain Forlot <romain.forlot@iot.bzh>
*
* 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.
*
*/
#define AFB_BINDING_VERSION 2
#include <afb/afb-binding.h>
#include <systemd/sd-event.h>
#include <json-c/json_object.h>
#include <stdbool.h>
#include <string.h>
#include "ctl-plugin.h"
#include "wrap-json.h"
#include "signal-composer.hpp"
extern "C"
{
CTLP_REGISTER("low-can");
typedef struct {
bool door;
bool window;
} doorT;
typedef struct {
doorT front_left;
doorT front_right;
doorT rear_left;
doorT rear_right;
} allDoorsCtxT;
typedef struct {
struct signalCBT* pluginHandle;
json_object *subscriptionBatch;
allDoorsCtxT allDoorsCtx;
} lowCANCtxT;
void setDoor(doorT* aDoor, const char* eventName, int eventStatus)
{
if(strcasestr(eventName, "door")) {aDoor->door = eventStatus;}
else if(strcasestr(eventName, "window")) {aDoor->window = eventStatus;}
else {AFB_WARNING("Unexpected behavior, this '%s' is not a door ! ", eventName);}
}
// Call at initialisation time
CTLP_ONLOAD(plugin, composerHandle)
{
lowCANCtxT *pluginCtx= (lowCANCtxT*)calloc (1, sizeof(lowCANCtxT));
pluginCtx->pluginHandle = (struct signalCBT*)composerHandle;
pluginCtx->subscriptionBatch = json_object_new_array();
AFB_NOTICE ("Low-can plugin: label='%s' version='%s' info='%s'",
plugin->label,
plugin->version,
plugin->info);
return (void*)pluginCtx;
}
CTLP_CAPI (subscribeToLow, source, argsJ, eventJ, context) {
lowCANCtxT *pluginCtx = (lowCANCtxT*)source->context;
json_object* dependsArrayJ = nullptr, *subscribeArgsJ = nullptr, *subscribeFilterJ = nullptr, *responseJ = nullptr, *filterJ = nullptr;
const char *id = nullptr, *event = nullptr, *unit = nullptr;
double frequency = 0;
int err = 0;
if(eventJ)
{
err = wrap_json_unpack(eventJ, "{ss,s?s,s?o,s?s,s?F,s?o !}",
"id", &id,
"event", &event,
"depends", &dependsArrayJ,
"unit", &unit,
"frequency", &frequency,
"getSignalsArgs", &filterJ);
if(err)
{
AFB_ERROR("Problem to unpack JSON object eventJ: %s",
json_object_to_json_string(eventJ));
return err;
}
if(frequency > 0 && !filterJ)
{wrap_json_pack(&subscribeFilterJ, "{sf}", "frequency", frequency);}
else
{subscribeFilterJ = filterJ;}
std::string eventStr = std::string(event);
std::string lowEvent = eventStr.substr(eventStr.find("/")+1);
err = wrap_json_pack(&subscribeArgsJ, "{ss, so*}",
"event", lowEvent.c_str(),
"filter", subscribeFilterJ);
if(err)
{
AFB_ERROR("Error building subscription query object");
return err;
}
json_object_array_add(pluginCtx->subscriptionBatch, subscribeArgsJ);
}
else
{
AFB_DEBUG("Calling subscribe with %s", json_object_to_json_string_ext(pluginCtx->subscriptionBatch, JSON_C_TO_STRING_PRETTY));
err = afb_service_call_sync("low-can", "subscribe", pluginCtx->subscriptionBatch, &responseJ);
if(err)
{AFB_ERROR("Subscribe to '%s' responseJ:%s", json_object_to_json_string_ext(pluginCtx->subscriptionBatch, JSON_C_TO_STRING_PRETTY), json_object_to_json_string(responseJ));}
}
return err;
}
CTLP_CAPI (isOpen, source, argsJ, eventJ, context) {
const char *eventName = nullptr;
int eventStatus;
uint64_t timestamp;
lowCANCtxT *pluginCtx=(lowCANCtxT*)source->context;
int err = wrap_json_unpack(eventJ, "{ss,sb,s?F}",
"name", &eventName,
"value", &eventStatus,
"timestamp", ×tamp);
if(err)
{
AFB_ERROR("Error parsing event %s", json_object_to_json_string(eventJ));
return -1;
}
if(strcasestr(eventName, "front_left"))
{
pluginCtx->pluginHandle->searchNsetSignalValue(eventName,(uint64_t)timestamp, eventStatus);
setDoor(&pluginCtx->allDoorsCtx.front_left, eventName, eventStatus);
}
else if(strcasestr(eventName, "front_right"))
{
pluginCtx->pluginHandle->searchNsetSignalValue(eventName,(uint64_t)timestamp, eventStatus);
setDoor(&pluginCtx->allDoorsCtx.front_right, eventName, eventStatus);
}
else if(strcasestr(eventName, "rear_left"))
{
pluginCtx->pluginHandle->searchNsetSignalValue(eventName,(uint64_t)timestamp, eventStatus);
setDoor(&pluginCtx->allDoorsCtx.rear_left, eventName, eventStatus);
}
else if(strcasestr(eventName, "rear_right"))
{
pluginCtx->pluginHandle->searchNsetSignalValue(eventName,(uint64_t)timestamp, eventStatus);
setDoor(&pluginCtx->allDoorsCtx.rear_right, eventName, eventStatus);
}
else
{
AFB_WARNING("Unexpected behavior, this '%s' is it really a door ! ", json_object_to_json_string(eventJ));
return -1;
}
AFB_DEBUG("This is the situation: source:%s, args:%s, event:%s,\n fld: %s, flw: %s, frd: %s, frw: %s, rld: %s, rlw: %s, rrd: %s, rrw: %s",
source->label,
json_object_to_json_string(argsJ),
json_object_to_json_string(eventJ),
pluginCtx->allDoorsCtx.front_left.door ? "true":"false",
pluginCtx->allDoorsCtx.front_left.window ? "true":"false",
pluginCtx->allDoorsCtx.front_right.door ? "true":"false",
pluginCtx->allDoorsCtx.front_right.window ? "true":"false",
pluginCtx->allDoorsCtx.rear_left.door ? "true":"false",
pluginCtx->allDoorsCtx.rear_left.window ? "true":"false",
pluginCtx->allDoorsCtx.rear_right.door ? "true":"false",
pluginCtx->allDoorsCtx.rear_right.window ? "true":"false"
);
return 0;
}
}
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