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akkoma/lib/pleroma/docs/generator.ex
2020-10-12 12:00:50 -05:00

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Elixir

# Pleroma: A lightweight social networking server
# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Docs.Generator do
@callback process(keyword()) :: {:ok, String.t()}
@spec process(module(), keyword()) :: {:ok, String.t()}
def process(implementation, descriptions) do
implementation.process(descriptions)
end
@spec list_behaviour_implementations(behaviour :: module()) :: [module()]
def list_behaviour_implementations(behaviour) do
:code.all_loaded()
|> Enum.filter(fn {module, _} ->
# This shouldn't be needed as all modules are expected to have module_info/1,
# but in test enviroments some transient modules `:elixir_compiler_XX`
# are loaded for some reason (where XX is a random integer).
if function_exported?(module, :module_info, 1) do
module.module_info(:attributes)
|> Keyword.get_values(:behaviour)
|> List.flatten()
|> Enum.member?(behaviour)
end
end)
|> Enum.map(fn {module, _} -> module end)
end
@doc """
Converts:
- atoms to strings with leading `:`
- module names to strings, without leading `Elixir.`
- add humanized labels to `keys` if label is not defined, e.g. `:instance` -> `Instance`
"""
@spec convert_to_strings([map()]) :: [map()]
def convert_to_strings(descriptions) do
Enum.map(descriptions, &format_entity(&1))
end
defp format_entity(entity) do
entity
|> format_key()
|> Map.put(:group, atom_to_string(entity[:group]))
|> format_children()
end
defp format_key(%{key: key} = entity) do
entity
|> Map.put(:key, atom_to_string(key))
|> Map.put(:label, entity[:label] || humanize(key))
end
defp format_key(%{group: group} = entity) do
Map.put(entity, :label, entity[:label] || humanize(group))
end
defp format_key(entity), do: entity
defp format_children(%{children: children} = entity) do
Map.put(entity, :children, Enum.map(children, &format_child(&1)))
end
defp format_children(entity), do: entity
defp format_child(%{suggestions: suggestions} = entity) do
entity
|> Map.put(:suggestions, format_suggestions(suggestions))
|> format_key()
|> format_group()
|> format_children()
end
defp format_child(entity) do
entity
|> format_key()
|> format_group()
|> format_children()
end
defp format_group(%{group: group} = entity) do
Map.put(entity, :group, format_suggestion(group))
end
defp format_group(entity), do: entity
defp atom_to_string(entity) when is_binary(entity), do: entity
defp atom_to_string(entity) when is_atom(entity), do: inspect(entity)
defp humanize(entity) do
string = inspect(entity)
if String.starts_with?(string, ":"),
do: Phoenix.Naming.humanize(entity),
else: string
end
defp format_suggestions({:list_behaviour_implementations, behaviour}) do
behaviour
|> list_behaviour_implementations()
|> format_suggestions()
end
defp format_suggestions([]), do: []
defp format_suggestions([suggestion | tail]) do
[format_suggestion(suggestion) | format_suggestions(tail)]
end
defp format_suggestion(entity) when is_atom(entity) do
atom_to_string(entity)
end
defp format_suggestion([head | tail] = entity) when is_list(entity) do
[format_suggestion(head) | format_suggestions(tail)]
end
defp format_suggestion(entity) when is_tuple(entity) do
format_suggestions(Tuple.to_list(entity)) |> List.to_tuple()
end
defp format_suggestion(entity), do: entity
end
defimpl Jason.Encoder, for: Tuple do
def encode(tuple, opts), do: Jason.Encode.list(Tuple.to_list(tuple), opts)
end
defimpl Jason.Encoder, for: [Regex, Function] do
def encode(term, opts), do: Jason.Encode.string(inspect(term), opts)
end
defimpl String.Chars, for: Regex do
def to_string(term), do: inspect(term)
end