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/* Node direction.

* Author: Steffen Vogel <post@steffenvogel.de>

* SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University

* SPDX-License-Identifier: Apache-2.0

#include <villas/config.hpp>

#include <villas/exceptions.hpp>

#include <villas/hook.hpp>

#include <villas/hook_list.hpp>

#include <villas/node.hpp>

#include <villas/node_compat_type.hpp>

#include <villas/node_direction.hpp>

#include <villas/utils.hpp>

using namespace villas;

using namespace villas::node;

using namespace villas::utils;

NodeDirection::NodeDirection(enum NodeDirection::Direction dir, Node *n)

: direction(dir), path(nullptr), node(n), enabled(1), builtin(1),

vectorize(1), config(nullptr) {}

int NodeDirection::parse(json_t *json) {

int ret;

json_error_t err;

json_t *json_hooks = nullptr;

json_t *json_signals = nullptr;

config = json;

ret = json_unpack_ex(json, &err, 0, "{ s?: o, s?: o, s?: i, s?: b, s?: b }",

"hooks", &json_hooks, "signals", &json_signals,

"vectorize", &vectorize, "builtin", &builtin, "enabled",

&enabled);

if (ret)

throw ConfigError(json, err, "node-config-node-in");

if (node->getFactory()->getFlags() &

(int)NodeFactory::Flags::PROVIDES_SIGNALS) {

// Do nothing.. Node-type will provide signals

signals = std::make_shared<SignalList>();

if (!signals)

throw MemoryAllocationError();

} else if (json_is_object(json_signals) || json_is_array(json_signals)) {

signals = std::make_shared<SignalList>();

if (!signals)

throw MemoryAllocationError();

if (json_is_object(json_signals)) {

json_t *json_name, *json_signal = json_signals;

int count;

ret = json_unpack_ex(json_signal, &err, 0, "{ s: i }", "count", &count);

if (ret)

throw ConfigError(json_signals, "node-config-node-signals",

"Invalid signal definition");

json_signals = json_array();

for (int i = 0; i < count; i++) {

json_t *json_signal_copy = json_copy(json_signal);

json_object_del(json_signal, "count");

// Append signal index

json_name = json_object_get(json_signal_copy, "name");

if (json_name) {

const char *name = json_string_value(json_name);

char *name_new;

int ret __attribute__((unused));

ret = asprintf(&name_new, "%s%d", name, i);

json_string_set(json_name, name_new);

}

json_array_append_new(json_signals, json_signal_copy);

}

json_object_set_new(json, "signals", json_signals);

}

ret = signals->parse(json_signals);

if (ret)

throw ConfigError(json_signals, "node-config-node-signals",

"Failed to parse signal definition");

} else if (json_is_string(json_signals)) {

const char *dt = json_string_value(json_signals);

signals = std::make_shared<SignalList>(dt);

if (!signals)

return -1;

} else {

signals =

std::make_shared<SignalList>(DEFAULT_SAMPLE_LENGTH, SignalType::FLOAT);

if (!signals)

return -1;

}

#ifdef WITH_HOOKS

if (json_hooks) {

int m = direction == NodeDirection::Direction::OUT

? (int)Hook::Flags::NODE_WRITE

: (int)Hook::Flags::NODE_READ;

hooks.parse(json_hooks, m, nullptr, node);

}

#endif // WITH_HOOKS

return 0;

}

void NodeDirection::check() {

if (vectorize <= 0)

throw RuntimeError(

"Invalid setting 'vectorize' with value {}. Must be natural number!",

vectorize);

#ifdef WITH_HOOKS

hooks.check();

#endif // WITH_HOOKS

}

int NodeDirection::prepare() {

#ifdef WITH_HOOKS

int t = direction == NodeDirection::Direction::OUT

? (int)Hook::Flags::NODE_WRITE

: (int)Hook::Flags::NODE_READ;

int m = builtin ? t | (int)Hook::Flags::BUILTIN : 0;

hooks.prepare(signals, m, nullptr, node);

#endif // WITH_HOOKS

return 0;

}

int NodeDirection::start() {

#ifdef WITH_HOOKS

hooks.start();

#endif // WITH_HOOKS

return 0;

}

int NodeDirection::stop() {

#ifdef WITH_HOOKS

hooks.stop();

#endif // WITH_HOOKS

return 0;

}

SignalList::Ptr NodeDirection::getSignals(int after_hooks) const {

#ifdef WITH_HOOKS

if (after_hooks && hooks.size() > 0)

return hooks.getSignals();

#endif // WITH_HOOKS

return signals;

}

unsigned NodeDirection::getSignalsMaxCount() const {

#ifdef WITH_HOOKS

if (hooks.size() > 0)

return MAX(signals->size(), hooks.getSignalsMaxCount());

#endif // WITH_HOOKS

return signals->size();

}

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