path.hpp

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/*
 * Copyright 2020 Robert Bosch GmbH
 *
 * 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.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
#pragma once
 
#include <filesystem>  // for path
#include <limits>      // for numeric_limits<>
#include <string>      // for string
#include <utility>     // for move
 
#include <fable/fable_fwd.hpp>         // for Environment
#include <fable/schema/interface.hpp>  // for Base<>
#include <fable/utility/path.hpp>      // for adl_serializer<>
 
namespace fable::schema {
 
template <typename T>
struct is_path : std::false_type {};
 
template <typename T>
inline constexpr bool is_path_v = is_path<T>::value;
 
template <>
struct is_path<std::filesystem::path> : std::true_type {};
 
enum class PathState {
  Any,         
  Absent,      
  Exists,      
  Executable,  
  FileExists,  
  DirExists,   
  NotFile,     
  NotDir,      
};
 
template <typename T>
class Path : public Base<Path<T>> {
  static_assert(is_path_v<T>);
 
 public:  // Types and Constructors
  using Type = T;
  using State = PathState;
 
  Path(Type* ptr, std::string desc) : Base<Path<T>>(JsonType::string, std::move(desc)), ptr_(ptr) {}
 
 public:  // Special
  [[nodiscard]] State state() const { return req_state_; }
 
  void set_state(State s) { req_state_ = s; }
 
  [[nodiscard]] Path state(State s) && {
    req_state_ = s;
    return std::move(*this);
  }
 
  [[nodiscard]] Path absent() && { return std::move(*this).state(State::Absent); }
  [[nodiscard]] Path exists() && { return std::move(*this).state(State::Exists); }
  [[nodiscard]] Path executable() && { return std::move(*this).state(State::Executable); }
  [[nodiscard]] Path file_exists() && { return std::move(*this).state(State::FileExists); }
  [[nodiscard]] Path dir_exists() && { return std::move(*this).state(State::DirExists); }
  [[nodiscard]] Path not_file() && { return std::move(*this).state(State::NotFile); }
  [[nodiscard]] Path not_dir() && { return std::move(*this).state(State::NotDir); }
 
  [[nodiscard]] Path not_empty() && {
    set_min_length(1);
    return std::move(*this);
  }
 
  [[nodiscard]] bool absolute() const {
    return req_abs_;
  }
 
  void set_absolute(bool value) {
    req_abs_ = value;
  }
 
  [[nodiscard]] Path absolute(bool value) && {
    req_abs_ = value;
    return std::move(*this);
  }
 
 
 
  [[nodiscard]] bool resolve() const { return resolve_; }
 
  void set_resolve(bool value) { resolve_ = value; }
 
  [[nodiscard]] Path resolve(bool value) && {
    resolve_ = value;
    return std::move(*this);
  }
 
  [[nodiscard]] bool normalize() const { return normalize_; }
  void set_normalize(bool value) { normalize_ = value; }
  [[nodiscard]] Path normalize(bool value) && {
    normalize_ = value;
    return std::move(*this);
  }
 
  [[nodiscard]] bool interpolate() const { return interpolate_; }
  void set_interpolate(bool value) { interpolate_ = value; }
  [[nodiscard]] Path interpolate(bool value) && {
    interpolate_ = value;
    return std::move(*this);
  }
 
  [[nodiscard]] Environment* environment() const { return env_; }
  void set_environment(Environment* env) { env_ = env; }
  [[nodiscard]] Path environment(Environment* env) && {
    env_ = env;
    return std::move(*this);
  }
 
  [[nodiscard]] size_t min_length() const { return min_length_; }
  void set_min_length(size_t value) { min_length_ = value; }
  [[nodiscard]] Path min_length(size_t value) && {
    min_length_ = value;
    return std::move(*this);
  }
 
  [[nodiscard]] size_t max_length() const { return max_length_; }
  void set_max_length(size_t value) { max_length_ = value; }
  [[nodiscard]] Path max_length(size_t value) && {
    max_length_ = value;
    return std::move(*this);
  }
 
  [[nodiscard]] const std::string& pattern() const { return pattern_; }
  void set_pattern(const std::string& value) { pattern_ = value; }
  [[nodiscard]] Path pattern(const std::string& value) && {
    pattern_ = value;
    return std::move(*this);
  }
 
 public:  // Overrides
  [[nodiscard]] Json json_schema() const override;
  bool validate(const Conf& c, std::optional<SchemaError>& err) const override;
 
  using Interface::to_json;
  void to_json(Json& j) const override {
    assert(ptr_ != nullptr);
    j = serialize(*ptr_);
  }
 
  void from_conf(const Conf& c) override {
    assert(ptr_ != nullptr);
    *ptr_ = deserialize(c);
  }
 
  [[nodiscard]] Json serialize(const Type& x) const { return x.native(); }
 
  [[nodiscard]] Type deserialize(const Conf& c) const;
 
  void serialize_into(Json& j, const Type& x) const { j = serialize(x); }
 
  void deserialize_into(const Conf& c, Type& x) const { x = deserialize(c); }
 
  void reset_ptr() override { ptr_ = nullptr; }
 
 private:
  [[nodiscard]] Type resolve_path(const Conf&, const Type&) const;
 
 private:
  State req_state_{State::Any};
  bool req_abs_{false};
  bool resolve_{true};
  bool normalize_{false};
  bool interpolate_{false};
  size_t min_length_{0};
  size_t max_length_{std::numeric_limits<size_t>::max()};
  std::string pattern_{};
  Environment* env_{nullptr};
  Type* ptr_{nullptr};
};
 
template <typename T, typename S, std::enable_if_t<is_path_v<T>, bool> = true>
Path<T> make_schema(T* ptr, S&& desc) {
  return {ptr, std::forward<S>(desc)};
}
 
}  // namespace fable::schema