forked from potsda.mn/mobilizon
290 lines
8.1 KiB
Elixir
290 lines
8.1 KiB
Elixir
defmodule Mobilizon.GraphQL.Resolvers.Group do
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@moduledoc """
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Handles the group-related GraphQL calls.
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"""
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alias Mobilizon.{Actors, Events, Users}
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alias Mobilizon.Actors.{Actor, Member}
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alias Mobilizon.Federation.ActivityPub
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alias Mobilizon.GraphQL.API
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alias Mobilizon.GraphQL.Resolvers.Person
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alias Mobilizon.Storage.Page
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alias Mobilizon.Users.User
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require Logger
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@doc """
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Find a group
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"""
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def find_group(
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parent,
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%{preferred_username: name} = args,
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%{
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context: %{
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current_user: %User{} = user
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}
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}
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) do
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with {:ok, %Actor{id: group_id} = group} <-
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ActivityPub.find_or_make_group_from_nickname(name),
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{:actor, %Actor{id: actor_id} = _actor} <- {:actor, Users.get_actor_for_user(user)},
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{:member, true} <- {:member, Actors.is_member?(actor_id, group_id)},
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group <- Person.proxify_pictures(group) do
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{:ok, group}
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else
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{:member, false} ->
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find_group(parent, args, nil)
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_ ->
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{:error, "Group with name #{name} not found"}
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end
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end
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@doc """
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Find a group
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"""
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def find_group(_parent, %{preferred_username: name}, _resolution) do
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with {:ok, actor} <- ActivityPub.find_or_make_group_from_nickname(name),
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%Actor{} = actor <- Person.proxify_pictures(actor),
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%Actor{} = actor <- restrict_fields_for_non_member_request(actor) do
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{:ok, actor}
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else
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_ ->
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{:error, "Group with name #{name} not found"}
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end
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end
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@doc """
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Lists all groups
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"""
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def list_groups(_parent, %{page: page, limit: limit}, _resolution) do
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{:ok, Actors.list_groups(page, limit)}
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end
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@doc """
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Create a new group. The creator is automatically added as admin
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"""
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def create_group(
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_parent,
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args,
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%{
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context: %{
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current_user: user
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}
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}
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) do
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with creator_actor_id <- Map.get(args, :creator_actor_id),
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{:is_owned, %Actor{} = creator_actor} <- User.owns_actor(user, creator_actor_id),
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args <- Map.put(args, :creator_actor, creator_actor),
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{:ok, _activity, %Actor{type: :Group} = group} <-
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API.Groups.create_group(args) do
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{:ok, group}
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else
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{:error, err} when is_bitstring(err) ->
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{:error, err}
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{:is_owned, nil} ->
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{:error, "Creator actor id is not owned by the current user"}
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end
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end
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def create_group(_parent, _args, _resolution) do
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{:error, "You need to be logged-in to create a group"}
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end
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@doc """
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Delete an existing group
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"""
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def delete_group(
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_parent,
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%{group_id: group_id, actor_id: actor_id},
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%{
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context: %{
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current_user: user
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}
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}
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) do
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with {actor_id, ""} <- Integer.parse(actor_id),
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{group_id, ""} <- Integer.parse(group_id),
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{:ok, %Actor{} = group} <- Actors.get_group_by_actor_id(group_id),
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{:is_owned, %Actor{}} <- User.owns_actor(user, actor_id),
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{:ok, %Member{} = member} <- Actors.get_member(actor_id, group.id),
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{:is_admin, true} <- {:is_admin, Member.is_administrator(member)},
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group <- Actors.delete_group!(group) do
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{:ok, %{id: group.id}}
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else
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{:error, :group_not_found} ->
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{:error, "Group not found"}
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{:is_owned, nil} ->
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{:error, "Actor id is not owned by authenticated user"}
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{:error, :member_not_found} ->
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{:error, "Actor id is not a member of this group"}
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{:is_admin, false} ->
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{:error, "Actor id is not an administrator of the selected group"}
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end
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end
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def delete_group(_parent, _args, _resolution) do
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{:error, "You need to be logged-in to delete a group"}
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end
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@doc """
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Join an existing group
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"""
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def join_group(
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_parent,
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%{group_id: group_id, actor_id: actor_id},
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%{
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context: %{
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current_user: user
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}
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}
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) do
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with {actor_id, ""} <- Integer.parse(actor_id),
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{group_id, ""} <- Integer.parse(group_id),
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{:is_owned, %Actor{} = actor} <- User.owns_actor(user, actor_id),
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{:ok, %Actor{} = group} <- Actors.get_group_by_actor_id(group_id),
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{:error, :member_not_found} <- Actors.get_member(actor.id, group.id),
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{:is_able_to_join, true} <- {:is_able_to_join, Member.can_be_joined(group)},
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role <- Member.get_default_member_role(group),
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{:ok, _} <- Actors.create_member(%{parent_id: group.id, actor_id: actor.id, role: role}) do
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{
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:ok,
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%{
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parent: Person.proxify_pictures(group),
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actor: Person.proxify_pictures(actor),
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role: role
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}
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}
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else
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{:is_owned, nil} ->
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{:error, "Actor id is not owned by authenticated user"}
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{:error, :group_not_found} ->
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{:error, "Group id not found"}
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{:is_able_to_join, false} ->
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{:error, "You cannot join this group"}
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{:ok, %Member{}} ->
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{:error, "You are already a member of this group"}
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end
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end
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def join_group(_parent, _args, _resolution) do
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{:error, "You need to be logged-in to join a group"}
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end
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@doc """
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Leave a existing group
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"""
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def leave_group(
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_parent,
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%{group_id: group_id, actor_id: actor_id},
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%{
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context: %{
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current_user: user
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}
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}
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) do
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with {actor_id, ""} <- Integer.parse(actor_id),
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{group_id, ""} <- Integer.parse(group_id),
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{:is_owned, %Actor{} = actor} <- User.owns_actor(user, actor_id),
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{:ok, %Member{} = member} <- Actors.get_member(actor.id, group_id),
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{:only_administrator, false} <-
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{:only_administrator, check_that_member_is_not_last_administrator(group_id, actor_id)},
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{:ok, _} <-
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Mobilizon.Actors.delete_member(member) do
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{
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:ok,
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%{
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parent: %{
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id: group_id
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},
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actor: %{
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id: actor_id
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}
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}
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}
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else
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{:is_owned, nil} ->
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{:error, "Actor id is not owned by authenticated user"}
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{:error, :member_not_found} ->
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{:error, "Member not found"}
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{:only_administrator, true} ->
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{:error, "You can't leave this group because you are the only administrator"}
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end
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end
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def leave_group(_parent, _args, _resolution) do
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{:error, "You need to be logged-in to leave a group"}
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end
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def find_events_for_group(
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%Actor{id: group_id} = group,
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_args,
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%{
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context: %{
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current_user: %User{} = user
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}
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}
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) do
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with {:actor, %Actor{id: actor_id} = _actor} <- {:actor, Users.get_actor_for_user(user)},
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{:member, true} <- {:member, Actors.is_member?(actor_id, group_id)} do
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# TODO : Handle public / restricted to group members events
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{:ok, Events.list_organized_events_for_group(group)}
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else
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{:member, false} ->
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{:ok, %Page{total: 0, elements: []}}
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end
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end
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def find_events_for_group(_parent, _args, _resolution) do
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{:ok, %Page{total: 0, elements: []}}
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end
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# We check that the actor asking to leave the group is not it's only administrator
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# We start by fetching the list of administrator or creators and if there's only one of them
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# and that it's the actor requesting leaving the group we return true
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@spec check_that_member_is_not_last_administrator(integer, integer) :: boolean
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defp check_that_member_is_not_last_administrator(group_id, actor_id) do
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case Actors.list_administrator_members_for_group(group_id) do
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%Page{total: total} when total > 1 ->
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true
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%Page{
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total: 1,
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elements: [
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%Member{
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actor: %Actor{
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id: member_actor_id
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}
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}
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]
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} ->
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actor_id == member_actor_id
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_ ->
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false
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end
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end
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defp restrict_fields_for_non_member_request(%Actor{} = group) do
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Map.merge(
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group,
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%{
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followers: [],
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followings: [],
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organized_events: [],
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comments: [],
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feed_tokens: []
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}
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)
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end
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end
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