Allows all actions to all targets, as long as no subject is tracked

iex> Calcinator.Authorization.SubjectLess.can?(nil, :show, Calcinator.Resources.TestAuthor)
true

Raises an ArgumentError if a subject is given, to prevent improper use.

iex> try do
...>   Calcinator.Authorization.SubjectLess.can?(
...>     %Calcinator.Resources.TestAuthor{id: 1},
...>     :show,
...>     %Calcinator.Resources.TestAuthor{id: 2}
...>   )
...> rescue
...>   error in ArgumentError ->
...>     error
...> end
%ArgumentError{
  message: "Calcinator.Authorization.SubjectLess.can?/3 should only be called with a `nil` subject, " <>
           "but was called with " <>
           "`%Calcinator.Resources.TestAuthor{__meta__: #Ecto.Schema.Metadata<:built, \"authors\">, id: 1, " <>
           "name: nil, password: nil, password_confirmation: nil, " <>
           "posts: #Ecto.Association.NotLoaded<association :posts is not loaded>}`"
}

Allows all associations on target, as long as no subject is tracked

iex> Calcinator.Authorization.SubjectLess.filter_associations_can(
...>   %Calcinator.Resources.TestAuthor{
...>     id: 1,
...>     posts: [
...>       %Calcinator.Resources.TestPost{
...>         id: 2
...>       }
...>     ]
...>   },
...>   nil,
...>   :show
...> )
%Calcinator.Resources.TestAuthor{
  id: 1,
  posts: [
    %Calcinator.Resources.TestPost{
      id: 2
    }
  ]
}

Raises an ArgumentError if a subject is given, to prevent improper use.

iex> try do
...>   Calcinator.Authorization.SubjectLess.filter_associations_can(
...>     %Calcinator.Resources.TestAuthor{
...>       id: 1,
...>       posts: [
...>         %Calcinator.Resources.TestPost{
...>           id: 2
...>         }
...>       ]
...>     },
...>     %Calcinator.Resources.TestAuthor{id: 1},
...>     :show
...>   )
...> rescue
...>   error in ArgumentError ->
...>     error
...> end
%ArgumentError{
  message: "Calcinator.Authorization.SubjectLess.filter_associations_can/3 should only be called with a `nil` " <>
           "subject, but was called with " <>
           "`%Calcinator.Resources.TestAuthor{__meta__: #Ecto.Schema.Metadata<:built, \"authors\">, id: 1, " <>
           "name: nil, password: nil, password_confirmation: nil, " <>
           "posts: #Ecto.Association.NotLoaded<association :posts is not loaded>}`"
}

Allows all targets, as long as no subject is tracked

iex> Calcinator.Authorization.SubjectLess.filter_can(
...>   [
...>     %Calcinator.Resources.TestPost{id: 2},
...>     %Calcinator.Resources.TestAuthor{id: 1}
...>   ],
...>   nil,
...>   :show
...> )
[
  %Calcinator.Resources.TestPost{id: 2},
  %Calcinator.Resources.TestAuthor{id: 1}
]

Raises an ArgumentError if a subject is given, to prevent improper use.

iex> try do
...>   Calcinator.Authorization.SubjectLess.filter_can(
...>     [
...>       %Calcinator.Resources.TestPost{id: 2},
...>       %Calcinator.Resources.TestAuthor{id: 1}
...>     ],
...>     %Calcinator.Resources.TestAuthor{id: 2},
...>     :show
...>   )
...> rescue
...>   error in ArgumentError ->
...>     error
...> end
%ArgumentError{
  message: "Calcinator.Authorization.SubjectLess.filter_can/3 should only be called with a `nil` subject, but " <>
           "was called with " <>
           "`%Calcinator.Resources.TestAuthor{__meta__: #Ecto.Schema.Metadata<:built, \"authors\">, id: 2, " <>
           "name: nil, password: nil, password_confirmation: nil, " <>
           "posts: #Ecto.Association.NotLoaded<association :posts is not loaded>}`"
}