/*
 * Copyright (C) 2019 Open Source Robotics Foundation
 *
 * 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.
 *
*/

syntax = "proto3";
package ignition.msgs;
option java_package = "com.ignition.msgs";
option java_outer_classname = "FuelMetadata";

/// \ingroup ignition.msgs
/// \interface FuelMetadata
/// \brief Meta data for an Ignition Fuel resource, such as a model or world.

import "ignition/msgs/version.proto";
import "ignition/msgs/version_range.proto";
import "ignition/msgs/versioned_name.proto";

message FuelMetadata
{
  /// \brief Contact information.
  message Contact
  {
    /// \brief Contact name.
    string name  = 1;

    /// \brief Contact email.
    string email = 2;
  }

  /// \brief Legal information, including copyright and license specifications.
  message Legal
  {
    /// \brief Copyright information, such as "Copyright 1974, John Doe"
    string copyright = 1;

    /// \brief License, such as "Apache-2.0"
    string license = 2;
  }

  /// \brief Information about a model resource.
  message Model
  {
    /// \brief Main model file, e.g. "model.sdf".
    string file = 1;

    /// \brief Name and version of the file format used by the file.
    VersionedName file_format = 2;
  }

  /// \brief Information about a world resource.
  message World
  {
    /// \brief Main world file, e.g. "world.sdf".
    string file = 1;

    /// \brief Name and version of the file format used by the file.
    VersionedName file_format = 2;
  }

  /// \brief Definition of a dependency
  message Dependency
  {
    /// \brief Dependency uri.
    string uri = 1;
  }

  /// \brief A message containing a tool name and a version or range of
  /// versions, e.g.
  ///   tools { name: "bullet" version_range { min: {major: 3 } } } }
  ///   tools { name: "gazebo" version { major: 11 } }
  message Compatibility
  {
    /// \brief Name of the tool/library.
    string name = 1;

    /// \brief If version is omitted, it is assumed that the model is
    /// compatible with all versions of the tool.
    oneof version_type
    {
      /// \brief Exact version that the model is compatible with.
      Version version = 2;

      /// \brief A range of compatible versions.
      VersionRange version_range = 3;
    }
  }

  /// \brief A Fuel resource has to be one of the following.
  oneof resource_type
  {
    Model model = 1;
    World world = 2;
  }

  /// \brief Name of the resource.
  string name              = 3;

  /// \brief Description of the resource.
  string description       = 4;

  /// \brief Version number of the resource. This version is set by Fuel.
  int32 version            = 5;

  /// \brief Authors of this resource.
  repeated Contact authors = 6;

  /// \brief Legal information, such as copyright and license specificiations.
  Legal legal              = 7;

  /// \brief Tags for a resource.
  repeated string tags     = 8;

  // A list of key-value pairs that can contain arbitrary user data.
  map<string, string> annotations = 9;

  /// \brief Resources that this resource depends on.
  /// \todo(nkoenig) This field is currently not used.
  repeated Dependency dependencies = 10;

  /// \brief List of tools/libraries with version numbers that are compatible
  /// with this resource.
  repeated Compatibility compatibilities = 11;
}
