defmodule Mobilizon do @moduledoc """ Mobilizon is a decentralized and federated Meetup-like using [ActivityPub](http://activitypub.rocks/). It consists of an API server build with [Elixir](http://elixir-lang.github.io/) and the [Phoenix Framework](https://hexdocs.pm/phoenix). Mobilizon relies on `Guardian` for auth and `Geo`/Postgis for geographical information. """ use Application import Cachex.Spec alias Mobilizon.{Config, Storage, Web} alias Mobilizon.Federation.ActivityPub alias Mobilizon.Service.ErrorPage alias Mobilizon.Service.Export.{Feed, ICalendar} @name Mix.Project.config()[:name] @version Mix.Project.config()[:version] @env Application.fetch_env!(:mobilizon, :env) @spec named_version :: String.t() def named_version, do: "#{@name} #{@version}" @spec user_agent :: String.t() def user_agent do info = "#{Web.Endpoint.url()} <#{Config.get([:instance, :email], "")}>" "#{named_version()}; #{info}" end @spec start(:normal | {:takeover, node} | {:failover, node}, term) :: {:ok, pid} | {:ok, pid, term} | {:error, term} def start(_type, _args) do children = [ # supervisors Storage.Repo, {Phoenix.PubSub, name: Mobilizon.PubSub}, Web.Endpoint, {Absinthe.Subscription, Web.Endpoint}, {Oban, Application.get_env(:mobilizon, Oban)}, # workers Guardian.DB.Token.SweeperServer, ActivityPub.Federator, cachex_spec(:feed, 2500, 60, 60, &Feed.create_cache/1), cachex_spec(:ics, 2500, 60, 60, &ICalendar.create_cache/1), cachex_spec( :actor_key_rotation, 2500, div(Application.get_env(:mobilizon, :activitypub)[:actor_key_rotation_delay], 60), 60 * 30 ), cachex_spec(:statistics, 10, 60, 60), cachex_spec(:config, 10, 60, 60), cachex_spec(:rich_media_cache, 10, 60, 60), cachex_spec(:activity_pub, 2500, 3, 15), %{ id: :cache_key_value, start: {Cachex, :start_link, [:key_value]} } ] ++ task_children(@env) Supervisor.start_link(children, strategy: :one_for_one, name: Mobilizon.Supervisor) end @spec config_change(keyword, keyword, [atom]) :: :ok def config_change(changed, _new, removed) do Web.Endpoint.config_change(changed, removed) :ok end # sobelow_skip ["DOS.StringToAtom"] @spec cachex_spec(atom, integer, integer, integer, function | nil) :: Supervisor.child_spec() defp cachex_spec(name, limit, default, interval, fallback \\ nil) do %{ id: String.to_atom("cache_#{to_string(name)}"), start: {Cachex, :start_link, [ name, Keyword.merge( cachex_options(limit, default, interval), fallback_options(fallback) ) ]} } end @spec cachex_options(integer, integer, integer) :: keyword defp cachex_options(limit, default, interval) do [ limit: limit, expiration: expiration( default: :timer.minutes(default), interval: :timer.seconds(interval) ) ] end @spec fallback_options(function | nil) :: keyword defp fallback_options(nil), do: [] defp fallback_options(fallback), do: [fallback: fallback(default: fallback)] defp task_children(:test), do: [] defp task_children(_), do: [relay_actor(), anonymous_actor(), render_error_page()] defp relay_actor do %{ id: :relay_actor_init, start: {Task, :start_link, [&ActivityPub.Relay.init/0]}, restart: :temporary } end defp anonymous_actor do %{ id: :anonymous_actor_init, start: {Task, :start_link, [&Mobilizon.Config.anonymous_actor_id/0]}, restart: :temporary } end defp render_error_page do %{ id: :render_error_page_init, start: {Task, :start_link, [&ErrorPage.init/0]}, restart: :temporary } end end