defmodule Mobilizon.Service.Export.ICalendar do @moduledoc """ Export an event to iCalendar format. """ alias Mobilizon.Actors.Actor alias Mobilizon.Addresses.Address alias Mobilizon.{Config, Events} alias Mobilizon.Events.Event alias Mobilizon.Service.Export.Common alias Mobilizon.Service.Formatter.HTML @doc """ Create cache for an actor, an event or an user token """ def create_cache("actor_" <> name) do case export_public_actor(name) do {:ok, res} -> {:commit, res} err -> {:ignore, err} end end def create_cache("event_" <> uuid) do with %Event{} = event <- Events.get_public_event_by_uuid_with_preload(uuid), {:ok, res} <- export_public_event(event) do {:commit, res} else err -> {:ignore, err} end end def create_cache("token_" <> token) do case fetch_events_from_token(token) do {:ok, res} -> {:commit, res} err -> {:ignore, err} end end def create_cache("instance") do case fetch_instance_feed() do {:ok, res} -> {:commit, res} err -> {:ignore, err} end end @spec fetch_instance_feed :: {:ok, String.t()} defp fetch_instance_feed do case Common.fetch_instance_public_content() do {:ok, events, _posts} -> {:ok, %ICalendar{events: events |> Enum.map(&do_export_event/1)} |> ICalendar.to_ics()} err -> {:error, err} end end @doc """ Export an event to iCalendar format. """ @spec export_event(Event.t()) :: {:ok, String.t()} def export_event(%Event{} = event), do: {:ok, events_to_ics([event])} @doc """ Export a public event to iCalendar format. The event must have a visibility of `:public` or `:unlisted` """ @spec export_public_event(Event.t()) :: {:ok, String.t()} def export_public_event(%Event{visibility: visibility} = event) when visibility in [:public, :unlisted] do {:ok, events_to_ics([event])} end @spec export_public_event(Event.t()) :: {:error, :event_not_public} def export_public_event(%Event{}), do: {:error, :event_not_public} @doc """ Export a public actor's events to iCalendar format. The actor must have a visibility of `:public` or `:unlisted`, as well as the events """ @spec export_public_actor(String.t()) :: String.t() def export_public_actor(name) do case Common.fetch_actor_event_feed(name) do {:ok, _actor, events, _posts} -> {:ok, events_to_ics(events)} err -> {:error, err} end end @spec export_private_actor(Actor.t()) :: String.t() def export_private_actor(%Actor{} = actor) do with events <- Common.fetch_actor_private_events(actor) do {:ok, events_to_ics(events)} end end @spec fetch_events_from_token(String.t()) :: String.t() defp fetch_events_from_token(token) do with %{events: events} <- Common.fetch_events_from_token(token) do {:ok, events_to_ics(events)} end end @spec events_to_ics(list(Events.t())) :: String.t() defp events_to_ics(events) do %ICalendar{events: events |> Enum.map(&do_export_event/1)} |> ICalendar.to_ics(vendor: vendor()) end @spec do_export_event(Event.t()) :: ICalendar.Event.t() defp do_export_event(%Event{} = event) do %ICalendar.Event{ summary: event.title, dtstart: event.begins_on, dtstamp: event.publish_at || DateTime.utc_now(), dtend: event.ends_on, description: HTML.strip_tags(event.description), uid: event.uuid, url: event.url, geo: Address.coords(event.physical_address), location: Address.representation(event.physical_address), categories: event.tags |> Enum.map(& &1.title) } end defp vendor do "Mobilizon #{Config.instance_version()}" end end