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VILLASnode/lib/api/requests/capabiltities.cpp

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/** The "capabiltities" API ressource.
*
* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2014-2020, Institute for Automation of Complex Power Systems, EONERC
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* @license GNU General Public License (version 3)
*
* VILLASnode
*
* This program 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 3 of the License, or
* any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************************/
#include <villas/config.h>
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#include <villas/plugin.h>
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#include <villas/hook.hpp>
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#include <villas/api/request.hpp>
#include <villas/api/response.hpp>
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namespace villas {
namespace node {
namespace api {
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class CapabilitiesRequest : public Request {
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public:
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using Request::Request;
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virtual Response * execute()
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{
json_t *json_hooks = json_array();
json_t *json_apis = json_array();
json_t *json_nodes = json_array();
json_t *json_formats = json_array();
json_t *json_name;
if (method != Session::Method::GET)
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throw InvalidMethod(this);
if (body != nullptr)
throw BadRequest("Capabilities endpoint does not accept any body data");
for (auto f : plugin::Registry::lookup<RequestFactory>()) {
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json_name = json_string(f->getName().c_str());
json_array_append_new(json_apis, json_name);
}
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for (auto f : plugin::Registry::lookup<HookFactory>()) {
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json_name = json_string(f->getName().c_str());
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json_array_append_new(json_hooks, json_name);
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}
for (size_t i = 0; i < vlist_length(&plugins); i++) {
struct plugin *p = (struct plugin *) vlist_at(&plugins, i);
json_t *json_name;
switch(p->type) {
case PluginType::NODE:
json_name = json_string(p->name);
json_array_append_new(json_nodes, json_name);
break;
case PluginType::FORMAT:
json_name = json_string(p->name);
json_array_append_new(json_formats, json_name);
break;
}
}
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#if 0 /* @todo Port to C++ */
for (auto f : NodeFactory::lookup()) {
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json_name = json_string(f->getName().c_str());
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json_array_append_new(json_nodes, json_name);
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}
for (auto f : FormatFactory::lookup()) {
json_name = json_string(f->getName().c_str());
json_array_append_new(json_formats, json_name);
}
#endif
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auto *json_capabilities = json_pack("{ s: o, s: o, s: o, s: o }",
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"hooks", json_hooks,
"node-types", json_nodes,
"apis", json_apis,
"formats", json_formats);
return new JsonResponse(session, HTTP_STATUS_OK, json_capabilities);
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}
};
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/* Register API request */
static char n[] = "capabilities";
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static char r[] = "/capabilities";
static char d[] = "get capabiltities and details about this VILLASnode instance";
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static RequestPlugin<CapabilitiesRequest, n, r, d> p;
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} /* namespace api */
} /* namespace node */
} /* namespace villas */