mobilizon/lib/graphql/resolvers/resource.ex

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defmodule Mobilizon.GraphQL.Resolvers.Resource do
@moduledoc """
Handles the resources-related GraphQL calls
"""
alias Mobilizon.{Actors, Resources}
alias Mobilizon.Actors.Actor
alias Mobilizon.Federation.ActivityPub.Actions
alias Mobilizon.Resources.Resource
alias Mobilizon.Resources.Resource.Metadata
alias Mobilizon.Service.RichMedia.Parser
alias Mobilizon.Storage.Page
alias Mobilizon.Users.User
alias Mobilizon.Web.MediaProxy
import Mobilizon.Web.Gettext
require Logger
@doc """
Find resources for group.
Returns only if actor requesting is a member of the group
"""
@spec find_resources_for_group(Actor.t(), map(), Absinthe.Resolution.t()) ::
{:ok, Page.t(Resource.t())}
def find_resources_for_group(
%Actor{id: group_id} = group,
%{page: page, limit: limit},
%{
context: %{
current_actor: %Actor{id: actor_id}
}
} = _resolution
) do
with {:member, true} <- {:member, Actors.member?(actor_id, group_id)},
%Page{} = page <- Resources.get_resources_for_group(group, page, limit) do
{:ok, page}
else
{:member, _} ->
find_resources_for_group(nil, nil, nil)
end
end
def find_resources_for_group(
_group,
_args,
_resolution
) do
{:ok, %Page{total: 0, elements: []}}
end
@spec find_resources_for_parent(Resource.t(), map(), Absinthe.Resolution.t()) ::
{:ok, Page.t(Resource.t())}
def find_resources_for_parent(
%Resource{actor_id: group_id} = parent,
%{page: page, limit: limit},
%{
context: %{
current_actor: %Actor{id: actor_id}
}
} = _resolution
) do
with {:member, true} <- {:member, Actors.member?(actor_id, group_id)},
%Page{} = page <- Resources.get_resources_for_folder(parent, page, limit) do
{:ok, page}
end
end
def find_resources_for_parent(_parent, _args, _resolution),
do: {:ok, %Page{total: 0, elements: []}}
@spec get_resource(any(), map(), Absinthe.Resolution.t()) ::
{:ok, Resource.t()} | {:error, :group_not_found | :resource_not_found | String.t()}
def get_resource(
_parent,
%{path: path, username: username},
%{
context: %{
current_actor: %Actor{id: actor_id}
}
} = _resolution
) do
Logger.debug("Getting resource for group with username #{username}")
with {:group, %Actor{id: group_id}} <- {:group, Actors.get_actor_by_name(username, :Group)},
{:member, true} <- {:member, Actors.member?(actor_id, group_id)},
{:resource, %Resource{} = resource} <-
{:resource, Resources.get_resource_by_group_and_path_with_preloads(group_id, path)} do
{:ok, resource}
else
{:group, _} -> {:error, :group_not_found}
{:member, false} -> {:error, dgettext("errors", "Profile is not member of group")}
{:resource, _} -> {:error, :resource_not_found}
end
end
def get_resource(_parent, _args, _resolution) do
{:error, dgettext("errors", "You need to be logged-in to access resources")}
end
@spec create_resource(any(), map(), Absinthe.Resolution.t()) ::
{:ok, Resource.t()} | {:error, String.t()}
def create_resource(
_parent,
%{actor_id: group_id} = args,
%{
context: %{
current_actor: %Actor{id: actor_id}
}
} = _resolution
) do
if Actors.member?(actor_id, group_id) do
parent = get_eventual_parent(args)
if check_resource_owned_by_group(parent, group_id) do
case Actions.Create.create(
:resource,
args
|> Map.put(:actor_id, group_id)
|> Map.put(:creator_id, actor_id),
true,
%{}
) do
{:ok, _, %Resource{} = resource} ->
{:ok, resource}
{:error, %Ecto.Changeset{} = changeset} ->
{:error, changeset}
{:error, _err} ->
{:error, dgettext("errors", "Error while creating resource")}
end
else
{:error, dgettext("errors", "Parent resource doesn't belong to this group")}
end
else
{:error, dgettext("errors", "Profile is not member of group")}
end
end
def create_resource(_parent, _args, _resolution) do
{:error, dgettext("errors", "You need to be logged-in to create resources")}
end
@spec update_resource(any(), map(), Absinthe.Resolution.t()) ::
{:ok, Resource.t()} | {:error, String.t()}
def update_resource(
_parent,
%{id: resource_id} = args,
%{
context: %{
current_actor: %Actor{id: actor_id, url: actor_url}
}
} = _resolution
) do
case Resources.get_resource_with_preloads(resource_id) do
%Resource{actor_id: group_id} = resource ->
if Actors.member?(actor_id, group_id) do
case Actions.Update.update(resource, args, true, %{"actor" => actor_url}) do
{:ok, _, %Resource{} = resource} ->
{:ok, resource}
{:error, %Ecto.Changeset{} = err} ->
{:error, err}
{:error, err} when is_atom(err) ->
{:error, dgettext("errors", "Unknown error while updating resource")}
end
else
{:error, dgettext("errors", "Profile is not member of group")}
end
nil ->
{:error, dgettext("errors", "Resource doesn't exist")}
end
end
def update_resource(_parent, _args, _resolution) do
{:error, dgettext("errors", "You need to be logged-in to update resources")}
end
@spec delete_resource(any(), map(), Absinthe.Resolution.t()) ::
{:ok, Resource.t()} | {:error, String.t()}
def delete_resource(
_parent,
%{id: resource_id},
%{
context: %{
current_actor: %Actor{id: actor_id} = actor
}
} = _resolution
) do
with {:resource, %Resource{parent_id: _parent_id, actor_id: group_id} = resource} <-
{:resource, Resources.get_resource_with_preloads(resource_id)},
{:member, true} <- {:member, Actors.member?(actor_id, group_id)},
{:ok, _, %Resource{} = resource} <-
Actions.Delete.delete(resource, actor) do
{:ok, resource}
else
{:resource, _} ->
{:error, dgettext("errors", "Resource doesn't exist")}
{:member, _} ->
{:error, dgettext("errors", "Profile is not member of group")}
end
end
def delete_resource(_parent, _args, _resolution) do
{:error, dgettext("errors", "You need to be logged-in to delete resources")}
end
@spec preview_resource_link(any(), map(), Absinthe.Resolution.t()) ::
{:ok, Metadata.t()} | {:error, String.t() | :unknown_resource}
def preview_resource_link(
_parent,
%{resource_url: resource_url},
%{
context: %{
current_user: %User{} = _user
}
} = _resolution
) do
case Parser.parse(resource_url) do
{:ok, data} when is_map(data) ->
{:ok, struct(Metadata, data)}
{:error, _error_type, _} ->
{:error, dgettext("errors", "Unable to fetch resource details from this URL.")}
end
end
def preview_resource_link(_parent, _args, _resolution) do
{:error, dgettext("errors", "You need to be logged-in to view a resource preview")}
end
@spec proxyify_pictures(Metadata.t(), map(), Absinthe.Resolution.t()) ::
{:ok, String.t() | nil} | {:error, String.t()}
def proxyify_pictures(%Metadata{} = metadata, _args, %{
definition: %{schema_node: %{name: name}}
}) do
case name do
"image_remote_url" -> {:ok, proxify_picture(metadata.image_remote_url)}
"favicon_url" -> {:ok, proxify_picture(metadata.favicon_url)}
_ -> {:error, "Unknown field"}
end
end
@spec get_eventual_parent(map()) :: Resource.t() | nil
defp get_eventual_parent(args) do
parent = args |> Map.get(:parent_id) |> get_parent_resource()
case parent do
%Resource{} -> parent
_ -> nil
end
end
@spec get_parent_resource(integer | nil) :: nil | Resource.t()
defp get_parent_resource(nil), do: nil
defp get_parent_resource(parent_id), do: Resources.get_resource(parent_id)
@spec check_resource_owned_by_group(Resource.t() | nil, integer) :: boolean
defp check_resource_owned_by_group(nil, _group_id), do: true
defp check_resource_owned_by_group(%Resource{actor_id: actor_id}, group_id)
when is_binary(group_id),
do: actor_id == String.to_integer(group_id)
defp check_resource_owned_by_group(%Resource{actor_id: actor_id}, group_id)
when is_number(group_id),
do: actor_id == group_id
@spec proxify_picture(String.t() | nil) :: String.t() | nil
defp proxify_picture(nil), do: nil
defp proxify_picture(url) do
MediaProxy.url(url)
end
end