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mobilizon/lib/federation/activity_stream/converter/todo.ex

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defmodule Mobilizon.Federation.ActivityStream.Converter.Todo do
@moduledoc """
TodoList converter.
This module allows to convert todo lists from ActivityStream format to our own
internal one, and back.
"""
alias Mobilizon.Actors.Actor
alias Mobilizon.Federation.ActivityPub
alias Mobilizon.Federation.ActivityStream.{Converter, Convertible}
alias Mobilizon.Todos
alias Mobilizon.Todos.{Todo, TodoList}
@behaviour Converter
defimpl Convertible, for: Todo do
alias Mobilizon.Federation.ActivityStream.Converter.Todo, as: TodoConverter
defdelegate model_to_as(todo), to: TodoConverter
end
@doc """
Convert an todo list struct to an ActivityStream representation
"""
@impl Converter
@spec model_to_as(Todo.t()) :: map
def model_to_as(
%Todo{
todo_list: %TodoList{actor: %Actor{url: group_url} = _group, url: todo_list_url},
creator: %Actor{url: creator_url}
} = todo
) do
%{
"type" => "Todo",
"actor" => creator_url,
"attributedTo" => group_url,
"id" => todo.url,
"name" => todo.title,
"status" => todo.status,
"todoList" => todo_list_url
}
end
@doc """
Converts an AP object data to our internal data structure.
"""
@impl Converter
@spec as_to_model_data(map) :: {:ok, map} | {:error, any()}
def as_to_model_data(
%{"type" => "Todo", "actor" => actor_url, "todoList" => todo_list_url} = object
) do
with {:ok, %Actor{id: creator_id} = _creator} <-
ActivityPub.get_or_fetch_actor_by_url(actor_url),
{:todo_list, %TodoList{id: todo_list_id}} <-
{:todo_list, Todos.get_todo_list_by_url(todo_list_url)} do
%{
title: object["name"],
status: object["status"],
url: object["id"],
todo_list_id: todo_list_id,
creator_id: creator_id
}
else
{:todo_list, nil} ->
with {:ok, %TodoList{}} <- ActivityPub.fetch_object_from_url(todo_list_url) do
as_to_model_data(object)
end
end
end
end