forked from potsda.mn/mobilizon
122 lines
3.7 KiB
Elixir
122 lines
3.7 KiB
Elixir
defmodule Mobilizon.Service.Export.Common do
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@moduledoc """
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Common tools for exportation
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"""
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alias Mobilizon.{Actors, Events, Posts, Users}
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alias Mobilizon.Actors.Actor
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alias Mobilizon.Events.{Event, FeedToken}
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alias Mobilizon.Posts.Post
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alias Mobilizon.Storage.Page
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alias Mobilizon.Users.User
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@spec fetch_actor_event_feed(String.t(), integer()) ::
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{:ok, Actor.t(), [Event.t()], [Post.t()]}
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| {:error, :actor_not_public | :actor_not_found}
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def fetch_actor_event_feed(name, limit) do
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case Actors.get_actor_by_name(name) do
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%Actor{} = actor ->
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if Actor.is_public_visibility?(actor) do
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%Page{elements: events} = Events.list_public_events_for_actor(actor, 1, limit)
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%Page{elements: posts} = Posts.get_public_posts_for_group(actor, 1, limit)
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{:ok, actor, events, posts}
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else
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{:error, :actor_not_public}
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end
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nil ->
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{:error, :actor_not_found}
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end
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end
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@typep token_feed_data :: %{
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type: :actor | :user,
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actor: Actor.t() | nil,
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user: User.t(),
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events: [Event.t()],
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token: String.t()
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}
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# Only events, not posts
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@spec fetch_events_from_token(String.t(), integer()) ::
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token_feed_data | {:error, :bad_token | :token_not_found}
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def fetch_events_from_token(token, limit) do
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case uuid_from_token(token) do
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{:ok, uuid} ->
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case Events.get_feed_token(uuid) do
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nil ->
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{:error, :token_not_found}
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%FeedToken{actor: actor, user: %User{} = user} ->
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produce_actor_feed(actor, user, token, limit)
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end
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{:error, :bad_token} ->
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{:error, :bad_token}
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end
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end
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@spec uuid_from_token(String.t()) :: {:ok, String.t()} | {:error, :bad_token}
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defp uuid_from_token(token) do
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case ShortUUID.decode(token) do
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{:ok, uuid} ->
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case Ecto.UUID.cast(uuid) do
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{:ok, _uuid} ->
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{:ok, uuid}
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:error ->
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{:error, :bad_token}
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end
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{:error, _err} ->
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{:error, :bad_token}
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end
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end
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@spec produce_actor_feed(Actor.t() | nil, User.t(), String.t(), integer()) :: token_feed_data
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defp produce_actor_feed(%Actor{} = actor, %User{} = user, token, limit) do
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%{
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type: :actor,
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actor: actor,
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events: fetch_actor_private_events(actor, limit),
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user: user,
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token: token
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}
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end
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defp produce_actor_feed(nil, %User{} = user, token, limit) do
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with actors <- Users.get_actors_for_user(user),
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events <-
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actors
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|> Enum.map(&fetch_actor_private_events(&1, limit))
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|> Enum.concat() do
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%{type: :user, events: events, user: user, token: token, actor: nil}
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end
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end
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@spec fetch_instance_public_content(integer()) :: {:ok, list(Event.t()), list(Post.t())}
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def fetch_instance_public_content(limit) do
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%Page{elements: events} = Events.list_public_local_events(1, limit)
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%Page{elements: posts} = Posts.list_public_local_posts(1, limit)
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{:ok, events, posts}
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end
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@spec fetch_actor_private_events(Actor.t(), integer()) :: list(Event.t())
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def fetch_actor_private_events(%Actor{} = actor, limit) do
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actor |> fetch_identity_participations(limit) |> participations_to_events()
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end
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@spec fetch_identity_participations(Actor.t(), integer()) :: Page.t()
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defp fetch_identity_participations(%Actor{} = actor, limit) do
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with %Page{} = page <- Events.list_event_participations_for_actor(actor, 1, limit) do
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page
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end
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end
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defp participations_to_events(%Page{elements: participations}) do
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participations
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|> Enum.map(& &1.event_id)
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|> Enum.map(&Events.get_event_with_preload!/1)
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end
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end
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