mobilizon.chapril.org-mobil.../lib/graphql/resolvers/media.ex
Thomas Citharel a24e08a6de
Add blurhash support to backend
Signed-off-by: Thomas Citharel <tcit@tcit.fr>
2021-06-10 15:18:08 +02:00

162 lines
4.9 KiB
Elixir

defmodule Mobilizon.GraphQL.Resolvers.Media do
@moduledoc """
Handles the media-related GraphQL calls
"""
alias Mobilizon.Actors.Actor
alias Mobilizon.{Medias, Users}
alias Mobilizon.Medias.Media
alias Mobilizon.Users.User
import Mobilizon.Web.Gettext
@doc """
Get media for an event
See Mobilizon.Web.Resolvers.Event.create_event/3
"""
def media(%{picture_id: media_id} = _parent, _args, _resolution) do
with {:ok, media} <- do_fetch_media(media_id), do: {:ok, media}
end
def media(%{picture: media} = _parent, _args, _resolution), do: {:ok, media}
def media(_parent, %{id: media_id}, _resolution), do: do_fetch_media(media_id)
def media(_parent, _args, _resolution), do: {:ok, nil}
def medias(%{media: medias}, _args, _resolution) do
{:ok, Enum.map(medias, &transform_media/1)}
end
@spec do_fetch_media(nil) :: {:error, nil}
defp do_fetch_media(nil), do: {:error, nil}
@spec do_fetch_media(String.t()) :: {:ok, Media.t()} | {:error, :not_found}
defp do_fetch_media(media_id) do
case Medias.get_media(media_id) do
%Media{} = media ->
{:ok, transform_media(media)}
nil ->
{:error, :not_found}
end
end
@spec upload_media(map, map, map) :: {:ok, Media.t()} | {:error, any}
def upload_media(
_parent,
%{file: %Plug.Upload{} = file} = args,
%{context: %{current_user: %User{} = user}}
) do
with %Actor{id: actor_id} <- Users.get_actor_for_user(user),
{:ok,
%{
name: _name,
url: url,
content_type: content_type,
size: size
} = uploaded} <-
Mobilizon.Web.Upload.store(file),
args <-
args
|> Map.put(:url, url)
|> Map.put(:size, size)
|> Map.put(:content_type, content_type),
{:ok, media = %Media{}} <-
Medias.create_media(%{
file: args,
actor_id: actor_id,
metadata: Map.take(uploaded, [:width, :height, :blurhash])
}) do
{:ok, transform_media(media)}
else
{:error, :mime_type_not_allowed} ->
{:error, dgettext("errors", "File doesn't have an allowed MIME type.")}
error ->
{:error, error}
end
end
def upload_media(_parent, _args, _resolution), do: {:error, :unauthenticated}
@doc """
Remove a media that the user owns
"""
@spec remove_media(map(), map(), map()) ::
{:ok, Media.t()}
| {:error, :unauthorized}
| {:error, :unauthenticated}
| {:error, :not_found}
def remove_media(_parent, %{id: media_id}, %{context: %{current_user: %User{} = user}}) do
with {:media, %Media{actor_id: actor_id} = media} <-
{:media, Medias.get_media(media_id)},
{:is_owned, %Actor{} = _actor} <- User.owns_actor(user, actor_id) do
Medias.delete_media(media)
else
{:media, nil} -> {:error, :not_found}
{:is_owned, _} -> {:error, :unauthorized}
end
end
def remove_media(_parent, _args, _resolution), do: {:error, :unauthenticated}
@doc """
Return the total media size for an actor
"""
@spec actor_size(map(), map(), map()) ::
{:ok, integer()} | {:error, :unauthorized} | {:error, :unauthenticated}
def actor_size(%Actor{id: actor_id}, _args, %{
context: %{current_user: %User{} = user}
}) do
if can_get_actor_size?(user, actor_id) do
{:ok, Medias.media_size_for_actor(actor_id)}
else
{:error, :unauthorized}
end
end
def actor_size(_parent, _args, _resolution), do: {:error, :unauthenticated}
@doc """
Return the total media size for a local user
"""
@spec user_size(map(), map(), map()) ::
{:ok, integer()} | {:error, :unauthorized} | {:error, :unauthenticated}
def user_size(%User{id: user_id}, _args, %{
context: %{current_user: %User{} = logged_user}
}) do
if can_get_user_size?(logged_user, user_id) do
{:ok, Medias.media_size_for_user(user_id)}
else
{:error, :unauthorized}
end
end
def user_size(_parent, _args, _resolution), do: {:error, :unauthenticated}
@spec transform_media(Media.t()) :: map()
defp transform_media(%Media{id: id, file: file, metadata: metadata}) do
%{
name: file.name,
url: file.url,
id: id,
content_type: file.content_type,
size: file.size,
metadata: metadata
}
end
@spec can_get_user_size?(User.t(), integer()) :: boolean()
defp can_get_actor_size?(%User{role: role} = user, actor_id) do
role in [:moderator, :administrator] || owns_actor?(User.owns_actor(user, actor_id))
end
@spec owns_actor?({:is_owned, Actor.t() | nil}) :: boolean()
defp owns_actor?({:is_owned, %Actor{} = _actor}), do: true
defp owns_actor?({:is_owned, _}), do: false
@spec can_get_user_size?(User.t(), integer()) :: boolean()
defp can_get_user_size?(%User{role: role, id: logged_user_id}, user_id) do
user_id == logged_user_id || role in [:moderator, :administrator]
end
end