147 lines
4.0 KiB
Elixir
147 lines
4.0 KiB
Elixir
defmodule Mobilizon.Federation.ActivityPub.Permission do
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@moduledoc """
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Module to check group members permissions on objects
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"""
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alias Mobilizon.Actors
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alias Mobilizon.Actors.Actor
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alias Mobilizon.Federation.ActivityPub.Types.{Entity, Ownable}
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require Logger
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use StructAccess
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defstruct [:access, :create, :update, :delete]
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@member_roles [:member, :moderator, :administrator]
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@type object :: %{id: String.t(), url: String.t()}
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@type permissions_member_role :: nil | :member | :moderator | :administrator
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@type t :: %__MODULE__{
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access: permissions_member_role,
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create: permissions_member_role,
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update: permissions_member_role,
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delete: permissions_member_role
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}
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@doc """
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Check that actor can access the object
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"""
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@spec can_access_group_object?(Actor.t(), Entity.t()) :: boolean()
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def can_access_group_object?(%Actor{} = actor, object) do
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can_manage_group_object?(:access, actor, object)
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end
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@doc """
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Check that actor can create such an object
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"""
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@spec can_create_group_object?(String.t() | integer(), String.t() | integer(), struct()) ::
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boolean()
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def can_create_group_object?(
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actor_id,
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group_id,
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object
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) do
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case object |> Ownable.permissions() |> get_in([:create]) do
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:member ->
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Actors.member?(actor_id, group_id)
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:moderator ->
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Actors.moderator?(actor_id, group_id)
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:administrator ->
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Actors.administrator?(actor_id, group_id)
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_ ->
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false
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end
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end
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@doc """
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Check that actor can update the object
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"""
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@spec can_update_group_object?(Actor.t(), Entity.t()) :: boolean()
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def can_update_group_object?(%Actor{} = actor, object) do
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can_manage_group_object?(:update, actor, object)
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end
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@doc """
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Check that actor can delete the object
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"""
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@spec can_delete_group_object?(Actor.t(), Entity.t()) :: boolean()
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def can_delete_group_object?(%Actor{} = actor, object) do
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can_manage_group_object?(:delete, actor, object)
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end
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@type existing_object_permissions :: :access | :update | :delete
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@spec can_manage_group_object?(
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existing_object_permissions(),
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Actor.t(),
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object()
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) :: boolean()
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defp can_manage_group_object?(permission, %Actor{url: actor_url} = actor, object) do
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if Ownable.group_actor(object) != nil do
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case object |> Ownable.permissions() |> get_in([permission]) do
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role when role in @member_roles ->
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activity_actor_is_group_member?(actor, object, role)
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_ ->
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case permission do
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:access ->
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Logger.warning("Actor #{actor_url} can't access #{object.url}")
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:update ->
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Logger.warning("Actor #{actor_url} can't update #{object.url}")
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:delete ->
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Logger.warning("Actor #{actor_url} can't delete #{object.url}")
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end
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false
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end
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else
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# Object is not owned by a group
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false
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end
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end
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@spec activity_actor_is_group_member?(Actor.t(), object(), atom()) :: boolean()
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defp activity_actor_is_group_member?(
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%Actor{id: actor_id, url: actor_url},
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object,
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role
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) do
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case Ownable.group_actor(object) do
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%Actor{type: :Group, id: group_id, url: group_url} ->
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Logger.debug("Group object url is #{group_url}")
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case role do
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:moderator ->
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Logger.debug(
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"Checking if activity actor #{actor_url} is a moderator from group from #{object.url}"
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)
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Actors.moderator?(actor_id, group_id)
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:administrator ->
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Logger.debug(
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"Checking if activity actor #{actor_url} is an administrator from group from #{object.url}"
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)
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Actors.administrator?(actor_id, group_id)
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_ ->
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Logger.debug(
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"Checking if activity actor #{actor_url} is a member from group from #{object.url}"
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)
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Actors.member?(actor_id, group_id)
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end
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_ ->
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false
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end
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end
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end
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