/***

  Olive - Non-Linear Video Editor
  Copyright (C) 2019 Olive Team

  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
  (at your option) 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 "node.h"

#include "common/qobjectlistcast.h"

Node::Node(QObject *parent) :
  QObject(parent)
{
}

QString Node::Category()
{
  // Return an empty category for any nodes that don't use one
  return QString();
}

QString Node::Description()
{
  // Return an empty string by default
  return QString();
}

void Node::InvalidateCache(const rational &start_range, const rational &end_range)
{
  QList<NodeParam *> params = parameters();

  // Loop through all parameters (there should be no children that are not NodeParams)
  for (int i=0;i<params.size();i++) {
    NodeParam* param = params.at(i);

    // If the Node is an output, relay the signal to any Nodes that are connected to it
    if (param->type() == NodeParam::kOutput) {
      for (int i=0;i<param->edges().size();i++) {
        param->edges().at(i)->input()->parent()->InvalidateCache(start_range, end_range);
      }
    }
  }
}

NodeParam *Node::ParamAt(int index)
{
  return static_cast<NodeParam*>(children().at(index));
}

QList<NodeParam *> Node::parameters()
{
  return static_qobjectlist_cast<NodeParam>(children());
}

int Node::ParameterCount()
{
  return children().size();
}

int Node::IndexOfParameter(NodeParam *param)
{
  return children().indexOf(param);
}