mobilizon.chapril.org-mobil.../lib/mobilizon/events/participant.ex

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import EctoEnum
defenum(Mobilizon.Events.ParticipantRoleEnum, :participant_role_type, [
:not_approved,
:participant,
:moderator,
:administrator,
:creator
])
defmodule Mobilizon.Events.Participant do
@moduledoc """
Represents a participant, an actor participating to an event
"""
use Ecto.Schema
import Ecto.Changeset
alias Mobilizon.Events.{Participant, Event}
alias Mobilizon.Actors.Actor
@primary_key {:id, :binary_id, autogenerate: true}
schema "participants" do
field(:role, Mobilizon.Events.ParticipantRoleEnum, default: :participant)
field(:url, :string)
belongs_to(:event, Event, primary_key: true)
belongs_to(:actor, Actor, primary_key: true)
timestamps()
end
@doc false
def changeset(%Participant{} = participant, attrs) do
participant
|> Ecto.Changeset.cast(attrs, [:url, :role, :event_id, :actor_id])
|> generate_url()
|> validate_required([:url, :role, :event_id, :actor_id])
end
# If there's a blank URL that's because we're doing the first insert
defp generate_url(%Ecto.Changeset{data: %Participant{url: nil}} = changeset) do
case fetch_change(changeset, :url) do
{:ok, _url} -> changeset
:error -> do_generate_url(changeset)
end
end
# Most time just go with the given URL
defp generate_url(%Ecto.Changeset{} = changeset), do: changeset
defp do_generate_url(%Ecto.Changeset{} = changeset) do
uuid = Ecto.UUID.generate()
changeset
|> put_change(
:url,
"#{MobilizonWeb.Endpoint.url()}/join/event/#{uuid}"
)
|> put_change(
:id,
uuid
)
end
@doc """
We check that the actor asking to leave the event is not it's only organizer
We start by fetching the list of organizers and if there's only one of them
and that it's the actor requesting leaving the event we return true
"""
@spec check_that_participant_is_not_only_organizer(integer(), integer()) :: boolean()
def check_that_participant_is_not_only_organizer(event_id, actor_id) do
case Mobilizon.Events.list_organizers_participants_for_event(event_id) do
[%Participant{actor: %Actor{id: participant_actor_id}}] ->
participant_actor_id == actor_id
_ ->
false
end
end
end