debianize-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, Users}
alias Mobilizon.Actors.Actor
alias Mobilizon.Federation.ActivityPub
alias Mobilizon.Resources.Resource
alias Mobilizon.Resources.Resource.Metadata
alias Mobilizon.Service.RichMedia.Parser
alias Mobilizon.Storage.Page
alias Mobilizon.Users.User
require Logger
@doc """
Find resources for group.
Returns only if actor requesting is a member of the group
"""
def find_resources_for_group(
%Actor{id: group_id} = group,
%{page: page, limit: limit},
%{
context: %{
current_user: %User{} = user
}
} = _resolution
) do
with %Actor{id: actor_id} <- Users.get_actor_for_user(user),
{:member, true} <- {:member, Actors.is_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
def find_resources_for_parent(
%Resource{actor_id: group_id} = parent,
_args,
%{
context: %{
current_user: %User{} = user
}
} = _resolution
) do
with %Actor{id: actor_id} <- Users.get_actor_for_user(user),
{:member, true} <- {:member, Actors.is_member?(actor_id, group_id)},
%Page{} = page <- Resources.get_resources_for_folder(parent) do
{:ok, page}
end
end
def find_resources_for_parent(_parent, _args, _resolution),
do: {:ok, %Page{total: 0, elements: []}}
def get_resource(
_parent,
%{path: path, username: username},
%{
context: %{
current_user: %User{} = user
}
} = _resolution
) do
with {:current_actor, %Actor{id: actor_id}} <-
{:current_actor, Users.get_actor_for_user(user)},
{:group, %Actor{id: group_id}} <- {:group, Actors.get_actor_by_name(username, :Group)},
{:member, true} <- {:member, Actors.is_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
{:member, false} -> {:error, "Actor is not member of group"}
{:resource, _} -> {:error, "No such resource"}
end
end
def get_resource(_parent, _args, _resolution) do
{:error, "You need to be logged-in to access resources"}
end
def create_resource(
_parent,
%{actor_id: group_id} = args,
%{
context: %{
current_user: %User{} = user
}
} = _resolution
) do
with %Actor{id: actor_id} <- Users.get_actor_for_user(user),
{:member, true} <- {:member, Actors.is_member?(actor_id, group_id)},
parent <- get_eventual_parent(args),
{:own_check, true} <- {:own_check, check_resource_owned_by_group(parent, group_id)},
{:ok, _, %Resource{} = resource} <-
ActivityPub.create(
:resource,
args
|> Map.put(:actor_id, group_id)
|> Map.put(:creator_id, actor_id),
true,
%{}
) do
{:ok, resource}
else
{:own_check, _} ->
{:error, "Parent resource doesn't match this group"}
{:member, _} ->
{:error, "Actor id is not member of group"}
end
end
def create_resource(_parent, _args, _resolution) do
{:error, "You need to be logged-in to create resources"}
end
def update_resource(
_parent,
%{id: resource_id} = args,
%{
context: %{
current_user: %User{} = user
}
} = _resolution
) do
with %Actor{id: actor_id} <- Users.get_actor_for_user(user),
{:resource, %Resource{actor_id: group_id} = resource} <-
{:resource, Resources.get_resource_with_preloads(resource_id)},
{:member, true} <- {:member, Actors.is_member?(actor_id, group_id)},
{:ok, _, %Resource{} = resource} <-
ActivityPub.update(:resource, resource, args, true, %{}) do
{:ok, resource}
else
{:resource, _} ->
{:error, "Resource doesn't exist"}
{:member, _} ->
{:error, "Actor id is not member of group"}
end
end
def update_resource(_parent, _args, _resolution) do
{:error, "You need to be logged-in to update resources"}
end
def delete_resource(
_parent,
%{id: resource_id},
%{
context: %{
current_user: %User{} = user
}
} = _resolution
) do
with %Actor{id: actor_id} <- Users.get_actor_for_user(user),
{:resource, %Resource{parent_id: _parent_id, actor_id: group_id} = resource} <-
{:resource, Resources.get_resource_with_preloads(resource_id)},
{:member, true} <- {:member, Actors.is_member?(actor_id, group_id)},
{:ok, _, %Resource{} = resource} <-
ActivityPub.delete(resource) do
{:ok, resource}
else
{:resource, _} ->
{:error, "Resource doesn't exist"}
{:member, _} ->
{:error, "Actor id is not member of group"}
end
end
def delete_resource(_parent, _args, _resolution) do
{:error, "You need to be logged-in to delete resources"}
end
def preview_resource_link(
_parent,
%{resource_url: resource_url},
%{
context: %{
current_user: %User{} = _user
}
} = _resolution
) do
with {:ok, data} when is_map(data) <- Parser.parse(resource_url) do
{:ok, struct(Metadata, data)}
end
end
def preview_resource_link(_parent, _args, _resolution) do
{:error, "You need to be logged-in to view a resource preview"}
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
end