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ash_json_api
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The JSON:API extension for the Ash Framework.
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Files
lib/ash_json_api/api/router.ex
defmodule AshJsonApi.Api.Router do
@moduledoc false
def define_router(module_name, api, resources, prefix, serve_schema?) do
Module.create(
module_name,
quote bind_quoted: [
api: api,
prefix: prefix,
resources: resources,
serve_schema?: serve_schema?
] do
use Plug.Router
require Ash
plug(:match)
plug(Plug.Parsers,
parsers: [:json],
pass: ["application/vnd.api+json"],
json_decoder: Jason
)
plug(:dispatch)
resources
|> Enum.filter(&(AshJsonApi.Resource in Ash.Resource.Info.extensions(&1)))
|> Enum.each(fn resource ->
for %{
route: route,
action: action_name,
controller: controller,
method: method,
action_type: action_type,
relationship: relationship_name
} = route_struct <-
AshJsonApi.Api.Router.routes(resource) do
opts =
[
relationship: Ash.Resource.Info.relationship(resource, relationship_name),
action: Ash.Resource.Info.action(resource, action_name, action_type),
resource: resource,
api: api,
prefix: prefix,
route: route_struct
]
|> Enum.reject(fn {_k, v} -> is_nil(v) end)
match(route, via: method, to: controller, init_opts: opts)
end
end)
if serve_schema? do
match("/schema",
via: :get,
to: AshJsonApi.Controllers.Schema,
init_opts: [api: api]
)
end
match(_, to: AshJsonApi.Controllers.NoRouteFound)
end,
Macro.Env.location(__ENV__)
)
module_name
end
@doc false
def routes(resource) do
resource
|> AshJsonApi.Resource.routes()
|> Enum.sort(fn left, right ->
left_path = Path.split(left.route)
right_path = Path.split(right.route)
left_path
|> Enum.zip(right_path)
|> sorts_first?()
|> case do
:undecided ->
Enum.count(left_path) > Enum.count(right_path)
result ->
result
end
end)
end
defp sorts_first?(zipped) do
Enum.reduce_while(zipped, :undecided, fn {left_part, right_part}, :undecided ->
left_param? = String.starts_with?(left_part, ":")
right_param? = String.starts_with?(right_part, ":")
cond do
left_part == right_part ->
{:cont, :undecided}
left_param? and not right_param? ->
{:halt, false}
not left_param? and right_param? ->
{:halt, true}
true ->
{:cont, :undecided}
end
end)
end
end