defmodule Absinthe.Adapter.StrictLanguageConventions do
@moduledoc """
Strict version of `Absinthe.Adapter.LanguageConventions` that will reject
improperly formatted external names.
For example, this document:
```graphql
{
create_user(user_id: 2) {
first_name
last_name
}
}
```
Would result in name-mismatch errors returned to the client.
The client should instead send the camelcase variant of the names:
```graphql
{
createUser(userId: 2) {
firstName
lastName
}
}
```
See `Absinthe.Adapter.LanguageConventions` for more information.
"""
use Absinthe.Adapter
@doc """
Converts a camelCase to snake_case
Returns `nil` if the converted internal name does not match the converted external name.
See `Absinthe.Adapter.LanguageConventions.to_internal_name/2`
"""
@impl Absinthe.Adapter
def to_internal_name(external_name, role) do
internal_name = Absinthe.Adapter.LanguageConventions.to_internal_name(external_name, role)
if external_name == Absinthe.Adapter.LanguageConventions.to_external_name(internal_name, role) do
internal_name
else
nil
end
end
@doc """
Converts a snake_case to camelCase
See `Absinthe.Adapter.LanguageConventions.to_external_name/2`
"""
@impl Absinthe.Adapter
def to_external_name(internal_name, role) do
Absinthe.Adapter.LanguageConventions.to_external_name(internal_name, role)
end
end