debianize-mobilizon/lib/mobilizon/events/event.ex

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Elixir
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defmodule Mobilizon.Events.Event do
@moduledoc """
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Represents an event.
"""
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use Ecto.Schema
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import Ecto.Changeset
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alias Ecto.Changeset
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alias Mobilizon.Actors.Actor
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alias Mobilizon.{Addresses, Events, Media, Mention}
alias Mobilizon.Addresses.Address
alias Mobilizon.Discussions.Comment
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alias Mobilizon.Events.{
EventOptions,
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EventParticipantStats,
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EventStatus,
EventVisibility,
JoinOptions,
Participant,
Session,
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Tag,
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Track
}
alias Mobilizon.Media.Picture
alias Mobilizon.Storage.Repo
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alias Mobilizon.Web.Endpoint
alias Mobilizon.Web.Router.Helpers, as: Routes
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@type t :: %__MODULE__{
url: String.t(),
local: boolean,
begins_on: DateTime.t(),
slug: String.t(),
description: String.t(),
ends_on: DateTime.t(),
title: String.t(),
status: EventStatus.t(),
draft: boolean,
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visibility: EventVisibility.t(),
join_options: JoinOptions.t(),
publish_at: DateTime.t(),
uuid: Ecto.UUID.t(),
online_address: String.t(),
phone_address: String.t(),
category: String.t(),
options: EventOptions.t(),
organizer_actor: Actor.t(),
attributed_to: Actor.t(),
physical_address: Address.t(),
picture: Picture.t(),
tracks: [Track.t()],
sessions: [Session.t()],
mentions: [Mention.t()],
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tags: [Tag.t()],
participants: [Actor.t()]
}
@update_required_attrs [:title, :begins_on, :organizer_actor_id]
@required_attrs @update_required_attrs ++ [:url, :uuid]
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@optional_attrs [
:slug,
:description,
:ends_on,
:category,
:status,
:draft,
:local,
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:visibility,
:join_options,
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:publish_at,
:online_address,
:phone_address,
:picture_id,
:physical_address_id,
:attributed_to_id
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]
@attrs @required_attrs ++ @optional_attrs
@update_attrs @update_required_attrs ++ @optional_attrs
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schema "events" do
field(:url, :string)
field(:local, :boolean, default: true)
field(:begins_on, :utc_datetime)
field(:slug, :string)
field(:description, :string)
field(:ends_on, :utc_datetime)
field(:title, :string)
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field(:status, EventStatus, default: :confirmed)
field(:draft, :boolean, default: false)
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field(:visibility, EventVisibility, default: :public)
field(:join_options, JoinOptions, default: :free)
field(:publish_at, :utc_datetime)
field(:uuid, Ecto.UUID, default: Ecto.UUID.generate())
field(:online_address, :string)
field(:phone_address, :string)
field(:category, :string)
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embeds_one(:options, EventOptions, on_replace: :delete)
embeds_one(:participant_stats, EventParticipantStats, on_replace: :update)
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)
belongs_to(:picture, Picture, on_replace: :update)
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has_many(:tracks, Track)
has_many(:sessions, Session)
has_many(:mentions, Mention)
has_many(:comments, Comment)
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many_to_many(:tags, Tag, join_through: "events_tags", on_replace: :delete)
many_to_many(:participants, Actor, join_through: Participant)
timestamps(type: :utc_datetime)
end
@doc false
@spec changeset(t, map) :: Changeset.t()
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def changeset(%__MODULE__{} = event, attrs) do
attrs = Map.update(attrs, :uuid, Ecto.UUID.generate(), & &1)
attrs = Map.update(attrs, :url, Routes.page_url(Endpoint, :event, attrs.uuid), & &1)
event
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|> cast(attrs, @attrs)
|> common_changeset(attrs)
|> put_creator_if_published(:create)
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|> validate_required(@required_attrs)
end
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@doc false
@spec update_changeset(t, map) :: Changeset.t()
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def update_changeset(%__MODULE__{} = event, attrs) do
event
|> cast(attrs, @update_attrs)
|> common_changeset(attrs)
|> put_creator_if_published(:update)
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|> validate_required(@update_required_attrs)
end
@spec common_changeset(Changeset.t(), map) :: Changeset.t()
defp common_changeset(%Changeset{} = changeset, attrs) do
changeset
|> cast_embed(:options)
|> put_tags(attrs)
|> put_address(attrs)
|> put_picture(attrs)
|> validate_lengths()
|> validate_end_time()
end
@spec validate_lengths(Changeset.t()) :: Changeset.t()
defp validate_lengths(%Changeset{} = changeset) do
changeset
|> validate_length(:title, min: 3, max: 200)
|> validate_length(:online_address, min: 3, max: 2000)
|> validate_length(:phone_address, min: 3, max: 200)
|> validate_length(:category, min: 2, max: 100)
# |> validate_length(:category, min: 2, max: 100)
|> validate_length(:slug, min: 3, max: 200)
end
defp validate_end_time(%Changeset{} = changeset) do
case fetch_field(changeset, :begins_on) do
{_, begins_on} ->
validate_change(changeset, :ends_on, fn :ends_on, ends_on ->
if DateTime.compare(begins_on, ends_on) == :gt,
do: [ends_on: "ends_on cannot be set before begins_on"],
else: []
end)
:error ->
changeset
end
end
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@doc """
Checks whether an event can be managed.
"""
@spec can_be_managed_by(t, integer | String.t()) :: boolean
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def can_be_managed_by(%__MODULE__{organizer_actor_id: organizer_actor_id}, actor_id)
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when organizer_actor_id == actor_id do
{:event_can_be_managed, true}
end
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def can_be_managed_by(_event, _actor), do: {:event_can_be_managed, false}
@spec put_tags(Changeset.t(), map) :: Changeset.t()
defp put_tags(%Changeset{} = changeset, %{tags: tags}) do
put_assoc(changeset, :tags, Enum.map(tags, &process_tag/1))
end
defp put_tags(%Changeset{} = changeset, _), do: changeset
# We need a changeset instead of a raw struct because of slug which is generated in changeset
defp process_tag(%{id: id} = _tag) do
Events.get_tag(id)
end
defp process_tag(tag) do
Tag.changeset(%Tag{}, tag)
end
# In case the provided addresses is an existing one
@spec put_address(Changeset.t(), map) :: Changeset.t()
defp put_address(%Changeset{} = changeset, %{physical_address: %{id: id} = _physical_address})
when not is_nil(id) do
case Addresses.get_address(id) do
%Address{} = address ->
put_assoc(changeset, :physical_address, address)
_ ->
cast_assoc(changeset, :physical_address)
end
end
# In case it's a new address but the origin_id is an existing one
defp put_address(%Changeset{} = changeset, %{physical_address: %{origin_id: origin_id}})
when not is_nil(origin_id) do
case Repo.get_by(Address, origin_id: origin_id) do
%Address{} = address ->
put_assoc(changeset, :physical_address, address)
_ ->
cast_assoc(changeset, :physical_address)
end
end
# In case it's a new address without any origin_id (manual)
defp put_address(%Changeset{} = changeset, _attrs) do
cast_assoc(changeset, :physical_address)
end
# In case the provided picture is an existing one
@spec put_picture(Changeset.t(), map) :: Changeset.t()
defp put_picture(%Changeset{} = changeset, %{picture: %{picture_id: id} = _picture}) do
case Media.get_picture!(id) do
%Picture{} = picture ->
put_assoc(changeset, :picture, picture)
_ ->
changeset
end
end
# In case it's a new picture
defp put_picture(%Changeset{} = changeset, _attrs) do
cast_assoc(changeset, :picture)
end
# Created or updated with draft parameter: don't publish
defp put_creator_if_published(
%Changeset{changes: %{draft: true}} = changeset,
_action
) do
put_embed(changeset, :participant_stats, %{creator: 0})
end
# Created with any other value: publish
defp put_creator_if_published(
%Changeset{} = changeset,
:create
) do
changeset
|> put_embed(:participant_stats, %{creator: 1})
end
# Updated from draft false to true: publish
defp put_creator_if_published(
%Changeset{
data: %{draft: false},
changes: %{draft: true}
} = changeset,
:update
) do
changeset
|> put_embed(:participant_stats, %{creator: 1})
end
defp put_creator_if_published(%Changeset{} = changeset, _),
do: cast_embed(changeset, :participant_stats)
end