debianize-mobilizon/lib/mobilizon/actors/member.ex

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defmodule Mobilizon.Actors.Member do
@moduledoc """
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Represents the membership of an actor to a group.
"""
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use Ecto.Schema
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import Ecto.Changeset
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alias Mobilizon.Actors.{Actor, MemberRole}
alias Mobilizon.Actors.Member.Metadata
alias Mobilizon.Web.Endpoint
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@type t :: %__MODULE__{
id: String.t(),
url: String.t(),
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role: MemberRole.t(),
parent: Actor.t(),
actor: Actor.t(),
metadata: Metadata.t()
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}
@required_attrs [:parent_id, :actor_id, :url]
@optional_attrs [:role, :invited_by_id]
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@attrs @required_attrs ++ @optional_attrs
@primary_key {:id, :binary_id, autogenerate: true}
schema "members" do
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field(:role, MemberRole, default: :member)
field(:url, :string)
field(:member_since, :utc_datetime)
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embeds_one(:metadata, Metadata, on_replace: :delete)
belongs_to(:invited_by, Actor)
belongs_to(:parent, Actor)
belongs_to(:actor, Actor)
timestamps()
end
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@doc """
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Gets the default member role depending on the actor openness.
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"""
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@spec get_default_member_role(Actor.t()) :: atom
def get_default_member_role(%Actor{openness: :open}), do: :member
def get_default_member_role(%Actor{}), do: :not_approved
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@doc """
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Checks whether the actor can be joined to the group.
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"""
def can_be_joined(%Actor{type: :Group, openness: :invite_only}), do: false
def can_be_joined(%Actor{type: :Group}), do: true
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@doc """
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Checks whether the member is an administrator (admin or creator) of the group.
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"""
def is_administrator(%__MODULE__{role: :administrator}), do: true
def is_administrator(%__MODULE__{role: :creator}), do: true
def is_administrator(%__MODULE__{}), do: false
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@doc false
@spec changeset(t | Ecto.Schema.t(), map) :: Ecto.Changeset.t()
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def changeset(%__MODULE__{} = member, attrs) do
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member
|> cast(attrs, @attrs)
|> cast_embed(:metadata)
|> ensure_url()
|> update_member_since()
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|> validate_required(@required_attrs)
# On both parent_id and actor_id
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|> unique_constraint(:parent_id, name: :members_actor_parent_unique_index)
|> unique_constraint(:url, name: :members_url_index)
end
# If there's a blank URL that's because we're doing the first insert
@spec ensure_url(Ecto.Changeset.t()) :: Ecto.Changeset.t()
defp ensure_url(%Ecto.Changeset{data: %__MODULE__{url: nil}} = changeset) do
case fetch_change(changeset, :url) do
{:ok, _url} ->
changeset
:error ->
generate_url(changeset)
end
end
# Most time just go with the given URL
defp ensure_url(%Ecto.Changeset{} = changeset), do: changeset
@spec generate_url(Ecto.Changeset.t()) :: Ecto.Changeset.t()
defp generate_url(%Ecto.Changeset{} = changeset) do
uuid = Ecto.UUID.generate()
changeset
|> put_change(:id, uuid)
|> put_change(:url, "#{Endpoint.url()}/member/#{uuid}")
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end
@spec update_member_since(Ecto.Changeset.t()) :: Ecto.Changeset.t()
defp update_member_since(%Ecto.Changeset{data: data} = changeset) do
new_role = get_change(changeset, :role)
cond do
new_role in [
:member,
:moderator,
:administrator,
:creator
] ->
put_change(
changeset,
:member_since,
DateTime.truncate(data.member_since || DateTime.utc_now(), :second)
)
new_role in [:invited, :not_approved, :rejected] ->
put_change(changeset, :member_since, nil)
true ->
changeset
end
end
end