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mobilizon/lib/service/export/icalendar.ex
2019-09-17 02:22:54 +02:00

118 lines
3.4 KiB
Elixir

defmodule Mobilizon.Service.Export.ICalendar do
@moduledoc """
Export an event to iCalendar format
"""
alias Mobilizon.Events.{Event, FeedToken}
alias Mobilizon.Events
alias Mobilizon.Actors.Actor
alias Mobilizon.Actors
alias Mobilizon.Users.User
alias Mobilizon.Users
@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, %ICalendar{events: [do_export_event(event)]} |> ICalendar.to_ics(vendor: "Mobilizon")}
end
@spec export_public_event(Event.t()) :: {:error, :event_not_public}
def export_public_event(%Event{}), do: {:error, :event_not_public}
@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: event.description,
uid: event.uuid,
categories: [event.category] ++ (event.tags |> Enum.map(& &1.slug))
}
end
@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(Actor.t()) :: String.t()
def export_public_actor(%Actor{} = actor) do
with true <- Actor.is_public_visibility(actor),
{:ok, events, _} <- Events.list_public_events_for_actor(actor) do
{:ok, %ICalendar{events: events |> Enum.map(&do_export_event/1)} |> ICalendar.to_ics()}
end
end
@spec export_private_actor(Actor.t()) :: String.t()
def export_private_actor(%Actor{} = actor) do
with events <- Events.list_event_participations_for_actor(actor) do
{:ok, %ICalendar{events: events |> Enum.map(&do_export_event/1)} |> ICalendar.to_ics()}
end
end
@doc """
Create cache for an actor
"""
def create_cache("actor_" <> name) do
with %Actor{} = actor <- Actors.get_local_actor_by_name(name),
{:ok, res} <- export_public_actor(actor) do
{:commit, res}
else
err ->
{:ignore, err}
end
end
@doc """
Create cache for an actor
"""
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
@doc """
Create cache for an actor
"""
def create_cache("token_" <> token) do
case fetch_events_from_token(token) do
{:ok, res} ->
{:commit, res}
err ->
{:ignore, err}
end
end
@spec fetch_events_from_token(String.t()) :: String.t()
defp fetch_events_from_token(token) do
with %FeedToken{actor: actor, user: %User{} = user} <- Events.get_feed_token(token) do
case actor do
%Actor{} = actor ->
export_private_actor(actor)
nil ->
with actors <- Users.get_actors_for_user(user),
events <-
actors
|> Enum.map(&Events.list_event_participations_for_actor/1)
|> Enum.concat() do
{:ok,
%ICalendar{events: events |> Enum.map(&do_export_event/1)} |> ICalendar.to_ics()}
end
end
end
end
end