// Copyright 2016 Google Inc. All Rights Reserved.
//
// 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 endpoints.examples.bookstore;

option java_multiple_files = true;
option java_outer_classname = "BookstoreProto";
option java_package = "com.google.endpoints.examples.bookstore";


import "google/api/annotations.proto";
import "google/protobuf/empty.proto";

// A simple Bookstore API.
//
// The API manages shelves and books resources. Shelves contain books.
service Bookstore {
  // Returns a list of all shelves in the bookstore.
  rpc ListShelves(google.protobuf.Empty) returns (ListShelvesResponse) {
    // Define HTTP mapping.
    // Client example (Assuming your service is hosted at the given 'DOMAIN_NAME'):
    //   curl http://DOMAIN_NAME/v1/shelves
    option (google.api.http) = { get: "/v1/shelves" };
  }
  // Creates a new shelf in the bookstore.
  rpc CreateShelf(CreateShelfRequest) returns (Shelf) {
    // Client example:
    //   curl -d '{"theme":"Music"}' http://DOMAIN_NAME/v1/shelves
    option (google.api.http) = {
      post: "/v1/shelves"
      body: "shelf"
    };
  }
  // Returns a specific bookstore shelf.
  rpc GetShelf(GetShelfRequest) returns (Shelf) {
    // Client example - returns the first shelf:
    //   curl http://DOMAIN_NAME/v1/shelves/1
    option (google.api.http) = { get: "/v1/shelves/{shelf}" };
  }
  // Deletes a shelf, including all books that are stored on the shelf.
  rpc DeleteShelf(DeleteShelfRequest) returns (google.protobuf.Empty) {
    // Client example - deletes the second shelf:
    //   curl -X DELETE http://DOMAIN_NAME/v1/shelves/2
    option (google.api.http) = { delete: "/v1/shelves/{shelf}" };
  }
  // Returns a list of books on a shelf.
  rpc ListBooks(ListBooksRequest) returns (ListBooksResponse) {
    // Client example - list the books from the first shelf:
    //   curl http://DOMAIN_NAME/v1/shelves/1/books
    option (google.api.http) = { get: "/v1/shelves/{shelf}/books" };
  }
  // Creates a new book.
  rpc CreateBook(CreateBookRequest) returns (Book) {
    // Client example - create a new book in the first shelf:
    //   curl -d '{"author":"foo","title":"bar"}' http://DOMAIN_NAME/v1/shelves/1/books
    option (google.api.http) = {
      post: "/v1/shelves/{shelf}/books"
      body: "book"
    };
  }
  // Returns a specific book.
  rpc GetBook(GetBookRequest) returns (Book) {
    // Client example - get the first book from the second shelf:
    //   curl http://DOMAIN_NAME/v1/shelves/2/books/1
    option (google.api.http) = { get: "/v1/shelves/{shelf}/books/{book}" };
  }
  // Deletes a book from a shelf.
  rpc DeleteBook(DeleteBookRequest) returns (google.protobuf.Empty) {
    // Client example - delete the first book from the first shelf:
    //   curl -X DELETE http://DOMAIN_NAME/v1/shelves/1/books/1
    option (google.api.http) = { delete: "/v1/shelves/{shelf}/books/{book}" };
  }
}

// A shelf resource.
message Shelf {
  // A unique shelf id.
  int64 id = 1;
  // A theme of the shelf (fiction, poetry, etc).
  string theme = 2;
}

// A book resource.
message Book {
  // A unique book id.
  int64 id = 1;
  // An author of the book.
  string author = 2;
  // A book title.
  string title = 3;
}

// Response to ListShelves call.
message ListShelvesResponse {
  // Shelves in the bookstore.
  repeated Shelf shelves = 1;
}

// Request message for CreateShelf method.
message CreateShelfRequest {
  // The shelf resource to create.
  Shelf shelf = 1;
}

// Request message for GetShelf method.
message GetShelfRequest {
  // The ID of the shelf resource to retrieve.
  int64 shelf = 1;
}

// Request message for DeleteShelf method.
message DeleteShelfRequest {
  // The ID of the shelf to delete.
  int64 shelf = 1;
}

// Request message for ListBooks method.
message ListBooksRequest {
  // ID of the shelf which books to list.
  int64 shelf = 1;
}

// Response message to ListBooks method.
message ListBooksResponse {
  // The books on the shelf.
  repeated Book books = 1;
}

// Request message for CreateBook method.
message CreateBookRequest {
  // The ID of the shelf on which to create a book.
  int64 shelf = 1;
  // A book resource to create on the shelf.
  Book book = 2;
}

// Request message for GetBook method.
message GetBookRequest {
  // The ID of the shelf from which to retrieve a book.
  int64 shelf = 1;
  // The ID of the book to retrieve.
  int64 book = 2;
}

// Request message for DeleteBook method.
message DeleteBookRequest {
  // The ID of the shelf from which to delete a book.
  int64 shelf = 1;
  // The ID of the book to delete.
  int64 book = 2;
}