schema.h

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// Copyright 2025 Google LLC
//
// 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.
 
#ifndef ACTIONENGINE_ACTIONS_SCHEMA_H_
#define ACTIONENGINE_ACTIONS_SCHEMA_H_
 
#include <functional>
#include <memory>
#include <string>
#include <string_view>
#include <utility>
#include <vector>
 
#include <absl/container/flat_hash_map.h>
#include <absl/status/status.h>
#include <absl/strings/str_cat.h>
#include <absl/strings/str_format.h>
#include <absl/strings/str_join.h>
 
#include "actionengine/data/types.h"
 
namespace act {
class Action;
}

 
namespace act {
 
using ActionHandler =
    std::function<absl::Status(const std::shared_ptr<Action>&)>;
 
// A type for Python and other bindings that cannot use absl::Status
using VoidActionHandler = std::function<void(const std::shared_ptr<Action>&)>;
 
using NameAndMimetype = std::pair<std::string, std::string>;
using NameToMimetype = absl::flat_hash_map<std::string, std::string>;

struct ActionSchema {
  [[nodiscard]] ActionMessage GetActionMessage(
      std::string_view action_id) const;

  std::string name;

  NameToMimetype inputs;

  NameToMimetype outputs;
};

template <typename Sink>
void AbslStringify(Sink& sink, const ActionSchema& schema) {
  std::vector<std::string> input_reprs;
  input_reprs.reserve(schema.inputs.size());
  for (const auto& [name, type] : schema.inputs) {
    input_reprs.push_back(absl::StrCat(name, ":", type));
  }
 
  std::vector<std::string> output_reprs;
  output_reprs.reserve(schema.outputs.size());
  for (const auto& [name, type] : schema.outputs) {
    output_reprs.push_back(absl::StrCat(name, ":", type));
  }
 
  absl::Format(&sink, "ActionSchema{name: %s, inputs: %s, outputs: %s}",
               schema.name, absl::StrJoin(input_reprs, ", "),
               absl::StrJoin(output_reprs, ", "));
}
 
}  // namespace act
 
#endif  // ACTIONENGINE_ACTIONS_SCHEMA_H_