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132 lines
3.6 KiB
Elixir
132 lines
3.6 KiB
Elixir
defmodule Mobilizon.Service.ActivityPub.Converters.Event do
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@moduledoc """
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Event converter
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This module allows to convert events from ActivityStream format to our own internal one, and back
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"""
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alias Mobilizon.Actors
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alias Mobilizon.Media
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alias Mobilizon.Media.Picture
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alias Mobilizon.Actors.Actor
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alias Mobilizon.Events.Event, as: EventModel
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alias Mobilizon.Service.ActivityPub.Converter
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alias Mobilizon.Events
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alias Mobilizon.Events.Tag
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alias Mobilizon.Addresses
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alias Mobilizon.Addresses.Address
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@behaviour Converter
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require Logger
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@doc """
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Converts an AP object data to our internal data structure
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"""
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@impl Converter
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@spec as_to_model_data(map()) :: map()
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def as_to_model_data(object) do
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Logger.debug("event as_to_model_data")
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with {:actor, {:ok, %Actor{id: actor_id}}} <-
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{:actor, Actors.get_actor_by_url(object["actor"])},
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{:address, address_id} <-
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{:address, get_address(object["location"])},
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{:tags, tags} <- {:tags, fetch_tags(object["tag"])} do
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picture_id =
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with true <- Map.has_key?(object, "attachment") && length(object["attachment"]) > 0,
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%Picture{id: picture_id} <-
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Media.get_picture_by_url(
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object["attachment"]
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|> hd
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|> Map.get("url")
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|> hd
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|> Map.get("href")
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) do
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picture_id
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else
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_ -> nil
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end
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{:ok,
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%{
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"title" => object["name"],
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"description" => object["content"],
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"organizer_actor_id" => actor_id,
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"picture_id" => picture_id,
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"begins_on" => object["startTime"],
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"category" => object["category"],
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"url" => object["id"],
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"uuid" => object["uuid"],
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"tags" => tags,
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"physical_address_id" => address_id
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}}
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else
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err ->
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{:error, err}
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end
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end
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defp get_address(%{"id" => url} = map) when is_map(map) and is_binary(url) do
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Logger.debug("Address with an URL, let's check against our own database")
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case Addresses.get_address_by_url(url) do
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%Address{id: address_id} ->
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address_id
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_ ->
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Logger.debug("not in our database, let's try to create it")
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map = Map.put(map, "url", map["id"])
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do_get_address(map)
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end
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end
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defp get_address(map) when is_map(map) do
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do_get_address(map)
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end
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defp get_address(nil), do: nil
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defp do_get_address(map) do
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map = Mobilizon.Service.ActivityPub.Converters.Address.as_to_model_data(map)
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case Addresses.create_address(map) do
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{:ok, %Address{id: address_id}} ->
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address_id
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_ ->
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nil
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end
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end
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defp fetch_tags(tags) do
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Enum.reduce(tags, [], fn tag, acc ->
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with true <- tag["type"] == "Hashtag",
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{:ok, %Tag{} = tag} <- Events.get_or_create_tag(tag) do
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acc ++ [tag]
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else
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_err ->
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acc
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end
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end)
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end
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@doc """
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Convert an event struct to an ActivityStream representation
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"""
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@impl Converter
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@spec model_to_as(EventModel.t()) :: map()
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def model_to_as(%EventModel{} = event) do
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%{
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"type" => "Event",
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"to" => ["https://www.w3.org/ns/activitystreams#Public"],
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"title" => event.title,
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"actor" => event.organizer_actor.url,
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"uuid" => event.uuid,
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"category" => event.category,
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"summary" => event.description,
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"publish_at" => (event.publish_at || event.inserted_at) |> DateTime.to_iso8601(),
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"updated_at" => event.updated_at |> DateTime.to_iso8601(),
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"id" => event.url
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}
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end
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end
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