// it is important to declare syntax version
syntax = "proto3";
service BookShelf {
    rpc AddBook(AddBookRequest) returns (AddBookResponse) {}
    rpc ListBook (ListBooksRequest) returns (ListBooksResponse) {}
    rpc DelBook (DelBookRequest) returns (DelBookResponse){}
    rpc FindBook (FindBookRequest) returns (FindBookResponse){}
}


message AddBookRequest {
    string addedBy = 1;
    BookInfo book = 2;
    message BookInfo {
        string isbn =1;
        string name =2;
        string author=3;
        string addedBy=4;
    }

}

message AddBookResponse {
    string message = 1;
}
message ListBooksRequest {
// no need to have anything
// could be extended to list books based on category ...
}

message ListBooksResponse {
    repeated BookInfo books =1;
    message BookInfo {
        string isbn =1;
        string name =2;
        string author=3;
        string addedBy=4;
    }
}

message  DelBookRequest {
    string isbn =1;
}

message DelBookResponse {
    string message =1;
}
message FindBookRequest {
    string isbn =1;
}

message FindBookResponse {
    Book book = 1;
    message Book {
        string isbn =1;
        string name =2;
        string author=3;
        string addedBy=4;
    }
}