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/*
* Copyright (C) 2015, 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.
*/
#include <string>
#include <string.h>
// afb-utilities
#include <wrap-json.h>
#include <filescan-utils.h>
#include "signal-composer-binding.hpp"
#include "signal-composer-apidef.h"
#include "signal-composer.hpp"
/// @brief callback for receiving message from low bindings. This will callback
/// an action defined in the configuration files depending on the event received
///
/// @param[in] event - event name
/// @param[in] object - eventual data that comes with the event
void onEvent(const char *event, json_object *object)
{
AFB_DEBUG("Received event json: %s", json_object_to_json_string(object));
Composer& composer = Composer::instance();
std::vector<std::shared_ptr<Signal>> signals = composer.searchSignals(event);
if(!signals.empty())
{
for(auto& sig: signals)
{
sig->onReceivedCB(object);
}
}
}
static int one_subscribe_unsubscribe(struct afb_req request,
bool subscribe,
const std::string& tag,
json_object* args)
{
return 1;
}
/// @brief entry point for client subscription request.
void subscribe(afb_req request)
{
int rc,rc2,n;
json_object *event, *args = afb_req_json(request);
if (args == NULL ||
!json_object_object_get_ex(args, "event", &event) ||
!json_object_object_get_ex(args, "events", &event) ||
!json_object_object_get_ex(args, "signal", &event) ||
!json_object_object_get_ex(args, "signals", &event))
{
rc = one_subscribe_unsubscribe(request, subscribe, "*", args);
}
else if (json_object_get_type(event) != json_type_array)
{
rc = one_subscribe_unsubscribe(request, subscribe, json_object_get_string(event), args);
}
else
{
rc = 0;
n = json_object_array_length(event);
for (int i = 0 ; i < n ; i++)
{
json_object *x = json_object_array_get_idx(event, i);
rc2 = one_subscribe_unsubscribe(request, subscribe, json_object_get_string(x), args);
if (rc >= 0)
rc = rc2 >= 0 ? rc + rc2 : rc2;
}
}
if(true)
afb_req_success(request, NULL, NULL);
else
afb_req_fail(request, "error", NULL);
}
/// @brief entry point for client un-subscription request.
void unsubscribe(afb_req request)
{
if(true)
afb_req_success(request, NULL, NULL);
else
afb_req_fail(request, "error when unsubscribe", NULL);
}
/// @brief verb that loads JSON configuration (old SigComp.json file now)
void loadConf(afb_req request)
{
json_object* args = afb_req_json(request), *fileJ;
const char* filepath;
wrap_json_unpack(args, "{s:s}", "filepath", &filepath);
fileJ = json_object_from_file(filepath);
if(Composer::instance().loadSignals(fileJ))
{afb_req_fail_f(request, "Loading configuration or subscription error", "Error code: -1");}
else
{
afb_req_success(request, NULL, NULL);
}
}
/// @brief entry point to list available signals
void list(afb_req request)
{
struct json_object *allSignalsJ = json_object_new_array();
std::vector<std::shared_ptr<Signal>> allSignals = Composer::instance().getAllSignals();
for(auto& sig: allSignals)
{json_object_array_add(allSignalsJ, sig->toJSON());}
if(json_object_array_length(allSignalsJ) && !execConf())
{
afb_req_success(request, allSignalsJ, NULL);
}
else
{
afb_req_fail(request, "error", "No Signals recorded so far");
}
}
/// @brief entry point for get requests.
void get(struct afb_req request)
{
int err = 0;
struct json_object* args = afb_req_json(request), *ans = nullptr,
*options = nullptr;
const char* sig;
// Process about Raw CAN message on CAN bus directly
err = wrap_json_unpack(args, "{ss,s?o!}", "signals", &sig,
"options", &options);
if(err)
{
AFB_ERROR("Can't process your request '%s'. Valid arguments are: string for 'signal' and JSON object for 'options' (optionnal)", json_object_to_json_string_ext(args, JSON_C_TO_STRING_PRETTY));
afb_req_fail(request, "error", NULL);
return;
}
ans = Composer::instance().getSignalValue(sig, options);
if (ans)
afb_req_success(request, ans, NULL);
else
afb_req_fail(request, "error", NULL);
}
int loadConf()
{
int err = 0;
const char* rootdir = strncat(GetBindingDirPath(), "/etc",
sizeof(GetBindingDirPath()) - strlen(GetBindingDirPath()) -1);
Composer& composer = Composer::instance();
err = composer.loadConfig(rootdir);
return err;
}
int execConf()
{
Composer& composer = Composer::instance();
int err = 0;
CtlConfigExec(composer.ctlConfig());
std::vector<std::shared_ptr<Signal>> allSignals = composer.getAllSignals();
ssize_t sigCount = allSignals.size();
for( std::shared_ptr<Signal>& sig: allSignals)
{
sig->attachToSourceSignals(composer);
}
for(auto& sig: allSignals)
{
if( (err += sig->recursionCheck()) )
{
AFB_ERROR("There is an infinite recursion loop in your signals definition. Root coming from signal: %s", sig->id().c_str());
return err;
}
}
composer.execSubscription();
AFB_DEBUG("Signal Composer Control configuration Done.\n signals=%d", (int)sigCount);
return err;
}
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