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ash

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A declarative, extensible framework for building Elixir applications.

Security advisory: This version has known vulnerabilities. View advisories

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ash lib ash options_helpers.ex
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lib/ash/options_helpers.ex

defmodule Ash.OptionsHelpers do
@moduledoc """
Helpers for working with nimble options
"""
@type schema :: NimbleOptions.schema()
def merge_schemas(left, right, section \\ nil) do
new_right =
Enum.map(right, fn {key, value} ->
{key, Keyword.put(value, :subsection, section)}
end)
Keyword.merge(left, new_right)
end
def validate(opts, schema) do
NimbleOptions.validate(opts, sanitize_schema(schema))
end
def validate!(opts, schema) do
NimbleOptions.validate!(opts, sanitize_schema(schema))
end
def docs(schema) do
schema
|> Enum.reject(fn {_key, opts} ->
opts[:hide]
end)
|> sanitize_schema()
|> Enum.map(fn {key, opts} ->
if opts[:doc] do
{key, Keyword.update!(opts, :doc, &String.replace(&1, "\n\n", " \n"))}
else
{key, opts}
end
end)
|> NimbleOptions.docs()
end
defp sanitize_schema(schema) do
Enum.map(schema, fn {key, opts} ->
new_opts = Keyword.update!(opts, :type, &sanitize_type/1)
{key, Keyword.drop(new_opts, [:hide, :as, :snippet])}
end)
end
defp sanitize_type(type) do
case type do
{:one_of, values} ->
{:in, sanitize_type(values)}
{:in, values} ->
{:in, sanitize_type(values)}
{:list, values} ->
{:list, sanitize_type(values)}
{:ash_behaviour, behaviour, _builtins} ->
{:custom, __MODULE__, :ash_behaviour, [behaviour]}
{:ash_behaviour, behaviour} ->
{:custom, __MODULE__, :ash_behaviour, [behaviour]}
{:behaviour, _behaviour} ->
:atom
:ash_resource ->
:atom
:ash_type ->
# We don't want to add compile time dependencies on types
# TODO: consider making this a legitimate validation
:any
type ->
type
end
end
def ash_behaviour({module, opts}, _behaviour) when is_atom(module) do
if Keyword.keyword?(opts) do
# We can't check if it implements the behaviour here, unfortunately
# As it may not be immediately available
{:ok, {module, opts}}
else
{:error, "Expected opts to be a keyword, got: #{inspect(opts)}"}
end
end
def ash_behaviour(module, behaviour) when is_atom(module) do
ash_behaviour({module, []}, behaviour)
end
def ash_behaviour(other, _) do
{:error, "Expected a module and opts, got: #{inspect(other)}"}
end
def map(value) when is_map(value), do: {:ok, value}
def map(_), do: {:error, "must be a map"}
def list_of_atoms(value) do
if is_list(value) and Enum.all?(value, &is_atom/1) do
{:ok, value}
else
{:error, "Expected a list of atoms"}
end
end
def module_and_opts({module, opts}) when is_atom(module) do
if Keyword.keyword?(opts) do
{:ok, {module, opts}}
else
{:error, "Expected the second element to be a keyword list, got: #{inspect(opts)}"}
end
end
def module_and_opts({other, _}) do
{:error, "Expected the first element to be a module, got: #{inspect(other)}"}
end
def module_and_opts(module) do
module_and_opts({module, []})
end
def default(value) when is_function(value, 0), do: {:ok, value}
def default({module, function, args})
when is_atom(module) and is_atom(function) and is_list(args),
do: {:ok, {module, function, args}}
def default(value), do: {:ok, value}
def make_required!(options, field) do
Keyword.update!(options, field, &Keyword.put(&1, :required, true))
end
def make_optional!(options, field) do
Keyword.update!(options, field, &Keyword.delete(&1, :required))
end
def set_type!(options, field, type) do
Keyword.update!(options, field, &Keyword.put(&1, :type, type))
end
def set_default!(options, field, value) do
Keyword.update!(options, field, fn config ->
config
|> Keyword.put(:default, value)
|> Keyword.delete(:required)
end)
end
def append_doc!(options, field, to_append) do
Keyword.update!(options, field, fn opt_config ->
Keyword.update(opt_config, :doc, to_append, fn existing ->
existing <> " - " <> to_append
end)
end)
end
end