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The extension for building GraphQL APIs with Ash
Current section
Files
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Files
lib/subscription/config.ex
defmodule AshGraphql.Subscription.Config do
@moduledoc """
Creates a config function used for the absinthe subscription definition
See https://github.com/absinthe-graphql/absinthe/blob/3d0823bd71c2ebb94357a5588c723e053de8c66a/lib/absinthe/schema/notation.ex#L58
"""
alias AshGraphql.Resource.Subscription
# sobelow_skip ["DOS.StringToAtom"]
def create_config(%Subscription{} = subscription, _domain, resource) do
config_module = String.to_atom(Macro.camelize(Atom.to_string(subscription.name)) <> ".Config")
defmodule config_module do
require Ash.Query
alias AshGraphql.Graphql.Resolver
@subscription subscription
@resource resource
def config(args, %{context: context}) do
read_action =
@subscription.read_action || Ash.Resource.Info.primary_action!(@resource, :read).name
actor =
case @subscription.actor do
{module, opts} ->
module.actor(context[:actor], opts)
_ ->
context[:actor]
end
# check with Ash.can? to make sure the user is able to read the resource
# otherwise we return an error here instead of just never sending something
# in the subscription
case Ash.can(
@resource
|> Ash.Query.new()
# not sure if we need this here
|> Ash.Query.do_filter(Resolver.massage_filter(@resource, Map.get(args, :filter)))
|> Ash.Query.set_tenant(context[:tenant])
|> Ash.Query.for_read(read_action),
actor,
tenant: context[:tenant],
run_queries?: false,
alter_source?: true
) do
{:ok, true} ->
{:ok, topic: "*", context_id: create_context_id(args, actor, context[:tenant])}
{:ok, true, _} ->
{:ok, topic: "*", context_id: create_context_id(args, actor, context[:tenant])}
_ ->
{:error, "unauthorized"}
end
end
def create_context_id(args, actor, tenant) do
Base.encode64(:crypto.hash(:sha256, :erlang.term_to_binary({args, actor, tenant})))
end
end
&config_module.config/2
end
end