158 lines
3.9 KiB
Elixir
158 lines
3.9 KiB
Elixir
defmodule Pleroma.Web.RichMedia.Card do
|
|
use Ecto.Schema
|
|
import Ecto.Changeset
|
|
import Ecto.Query
|
|
|
|
alias Pleroma.Activity
|
|
alias Pleroma.HTML
|
|
alias Pleroma.Object
|
|
alias Pleroma.Repo
|
|
alias Pleroma.Web.RichMedia.Backfill
|
|
alias Pleroma.Web.RichMedia.Parser
|
|
|
|
@cachex Pleroma.Config.get([:cachex, :provider], Cachex)
|
|
@config_impl Application.compile_env(:pleroma, [__MODULE__, :config_impl], Pleroma.Config)
|
|
|
|
@type t :: %__MODULE__{}
|
|
|
|
schema "rich_media_card" do
|
|
field(:url_hash, :binary)
|
|
field(:fields, :map)
|
|
|
|
timestamps()
|
|
end
|
|
|
|
@doc false
|
|
def changeset(card, attrs) do
|
|
card
|
|
|> cast(attrs, [:url_hash, :fields])
|
|
|> validate_required([:url_hash, :fields])
|
|
|> unique_constraint(:url_hash)
|
|
end
|
|
|
|
@spec create(String.t(), map()) :: {:ok, t()}
|
|
def create(url, fields) do
|
|
url_hash = url_to_hash(url)
|
|
|
|
fields = Map.put_new(fields, "url", url)
|
|
|
|
%__MODULE__{}
|
|
|> changeset(%{url_hash: url_hash, fields: fields})
|
|
|> Repo.insert(on_conflict: {:replace, [:fields]}, conflict_target: :url_hash)
|
|
end
|
|
|
|
@spec delete(String.t()) :: {:ok, Ecto.Schema.t()} | {:error, Ecto.Changeset.t()} | :ok
|
|
def delete(url) do
|
|
url_hash = url_to_hash(url)
|
|
@cachex.del(:rich_media_cache, url_hash)
|
|
|
|
case get_by_url(url) do
|
|
%__MODULE{} = card -> Repo.delete(card)
|
|
nil -> :ok
|
|
end
|
|
end
|
|
|
|
@spec get_by_url(String.t() | nil) :: t() | nil | :error
|
|
def get_by_url(url) when is_binary(url) do
|
|
if @config_impl.get([:rich_media, :enabled]) do
|
|
url_hash = url_to_hash(url)
|
|
|
|
@cachex.fetch!(:rich_media_cache, url_hash, fn _ ->
|
|
result =
|
|
__MODULE__
|
|
|> where(url_hash: ^url_hash)
|
|
|> Repo.one()
|
|
|
|
case result do
|
|
%__MODULE__{} = card -> {:commit, card}
|
|
_ -> {:ignore, nil}
|
|
end
|
|
end)
|
|
else
|
|
:error
|
|
end
|
|
end
|
|
|
|
def get_by_url(nil), do: nil
|
|
|
|
@spec get_or_backfill_by_url(String.t(), map()) :: t() | nil
|
|
def get_or_backfill_by_url(url, backfill_opts \\ %{}) do
|
|
case get_by_url(url) do
|
|
%__MODULE__{} = card ->
|
|
card
|
|
|
|
nil ->
|
|
backfill_opts = Map.put(backfill_opts, :url, url)
|
|
|
|
Backfill.start(backfill_opts)
|
|
|
|
nil
|
|
|
|
:error ->
|
|
nil
|
|
end
|
|
end
|
|
|
|
@spec get_by_object(Object.t()) :: t() | nil | :error
|
|
def get_by_object(object) do
|
|
case HTML.extract_first_external_url_from_object(object) do
|
|
nil -> nil
|
|
url -> get_or_backfill_by_url(url)
|
|
end
|
|
end
|
|
|
|
@spec get_by_activity(Activity.t()) :: t() | nil | :error
|
|
# Fake/Draft activity
|
|
def get_by_activity(%Activity{id: "pleroma:fakeid"} = activity) do
|
|
with %Object{} = object <- Object.normalize(activity, fetch: false),
|
|
url when not is_nil(url) <- HTML.extract_first_external_url_from_object(object) do
|
|
case get_by_url(url) do
|
|
# Cache hit
|
|
%__MODULE__{} = card ->
|
|
card
|
|
|
|
# Cache miss, but fetch for rendering the Draft
|
|
_ ->
|
|
with {:ok, fields} <- Parser.parse(url),
|
|
{:ok, card} <- create(url, fields) do
|
|
card
|
|
else
|
|
_ -> nil
|
|
end
|
|
end
|
|
else
|
|
_ ->
|
|
nil
|
|
end
|
|
end
|
|
|
|
def get_by_activity(activity) do
|
|
with %Object{} = object <- Object.normalize(activity, fetch: false),
|
|
{_, nil} <- {:cached, get_cached_url(object, activity.id)} do
|
|
nil
|
|
else
|
|
{:cached, url} ->
|
|
get_or_backfill_by_url(url, %{activity_id: activity.id})
|
|
|
|
_ ->
|
|
:error
|
|
end
|
|
end
|
|
|
|
@spec url_to_hash(String.t()) :: String.t()
|
|
def url_to_hash(url) do
|
|
:crypto.hash(:sha256, url) |> Base.encode16(case: :lower)
|
|
end
|
|
|
|
defp get_cached_url(object, activity_id) do
|
|
key = "URL|#{activity_id}"
|
|
|
|
@cachex.fetch!(:scrubber_cache, key, fn _ ->
|
|
url = HTML.extract_first_external_url_from_object(object)
|
|
Activity.HTML.add_cache_key_for(activity_id, key)
|
|
|
|
{:commit, url}
|
|
end)
|
|
end
|
|
end
|