IDEA - REST API Server with operations

# working name

use Safety::API::Dance;

resource "/v1/users"
  => abstract { 'Optional OpenAPI documentation' }
  => GET  { operation 'list_users' }
  => PUT  { operation 'create_user' }
  => POST { operations 'query_users' }
  ;

resource "/v1/users/:user_id"
  => GET    { operation 'fetch_user' }
  => POST   { operation 'update_user' }
  => DELETE { operation 'delete_user' }
  ;

resource parameter user_id
  => constraint => PositiveInt
  ;

operation delete_user
   => abstract { 'OpenAPI documentation' }
   => returns  { constraint }
   => throws   { HTTP::Status::NOT_FOUND => via 'My::API::X::User::Not::Found' }
   => throws   { HTTP::Status::BAD_CONTENT => via 'My::API::X::User::Validation' }
   # either direct callback
   => as => sub { }
   # or delegate to the instance
   => class => 'My::API::Users'
   => method => 'delete'
   ;

# evolution of an idea (in fact this become before first step itself)
# one declaration for uri with or without item identifier parameter

resource "/v1/users/:user_id"
  => abstract { 'Optional OpenAPI documentation' }
  => list_items  { operation 'list_users' }
  => create_item { operation 'create_user' }
  => query_items { operations 'query_users' }
  => fetch_item  { operation 'fetch_user' }
  => update_item { operation 'update_user' }
  => delete_item { operation 'delete_user' }
  ;