Allow to add metadata to an event

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/mobilizon/events/event.ex

@@ -16,6 +16,7 @@ defmodule Mobilizon.Events.Event do
   alias Mobilizon.Discussions.Comment
 
   alias Mobilizon.Events.{
+    EventMetadata,
     EventOptions,
     EventParticipantStats,
     EventStatus,
@@ -108,6 +109,7 @@ defmodule Mobilizon.Events.Event do
 
     embeds_one(:options, EventOptions, on_replace: :delete)
     embeds_one(:participant_stats, EventParticipantStats, on_replace: :update)
+    embeds_many(:metadata, EventMetadata, on_replace: :delete)
     belongs_to(:organizer_actor, Actor, foreign_key: :organizer_actor_id)
     belongs_to(:attributed_to, Actor, foreign_key: :attributed_to_id)
     belongs_to(:physical_address, Address, on_replace: :nilify)
@@ -151,6 +153,7 @@ defmodule Mobilizon.Events.Event do
   defp common_changeset(%Changeset{} = changeset, attrs) do
     changeset
     |> cast_embed(:options)
+    |> cast_embed(:metadata)
     |> put_assoc(:contacts, Map.get(attrs, :contacts, []))
     |> put_assoc(:media, Map.get(attrs, :media, []))
     |> put_tags(attrs)

lib/mobilizon/events/event_metadata.ex

@@ -0,0 +1,45 @@
+defmodule Mobilizon.Events.EventMetadata do
+  @moduledoc """
+  Participation stats on event
+  """
+
+  use Ecto.Schema
+  import Ecto.Changeset
+  import EctoEnum
+
+  defenum(EventMetadataTypeEnum, string: 0, integer: 1, boolean: 2)
+
+  @type t :: %__MODULE__{
+          key: String.t(),
+          value: String.t()
+        }
+
+  @required_attrs [
+    :key,
+    :value
+  ]
+
+  @optional_attrs [
+    :title,
+    :type
+  ]
+
+  @attrs @required_attrs ++ @optional_attrs
+
+  @primary_key false
+  @derive Jason.Encoder
+  embedded_schema do
+    field(:key, :string)
+    field(:title, :string)
+    field(:value, :string)
+    field(:type, EventMetadataTypeEnum, default: :string)
+  end
+
+  @doc false
+  @spec changeset(t, map) :: Ecto.Changeset.t()
+  def changeset(%__MODULE__{} = event_metadata, attrs) do
+    event_metadata
+    |> cast(attrs, @attrs)
+    |> validate_required(@required_attrs)
+  end
+end