Add Push notifications backend support

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

lib/mobilizon/users/push_subscription.ex

@@ -0,0 +1,49 @@
+defmodule Mobilizon.Users.PushSubscription do
+  use Ecto.Schema
+  alias Mobilizon.Users.User
+  import Ecto.Changeset
+
+  schema "user_push_subscriptions" do
+    field(:digest, :string)
+    belongs_to(:user, User)
+
+    embeds_one :data, Data, on_replace: :delete do
+      field(:endpoint, :string)
+
+      embeds_one :keys, Keys, on_replace: :delete do
+        field(:auth, :string)
+        field(:p256dh, :string)
+      end
+    end
+
+    timestamps()
+  end
+
+  @doc false
+  def changeset(push_subscription, attrs) do
+    push_subscription
+    |> cast(attrs, [:user_id])
+    |> cast_embed(:data, with: &cast_data/2)
+    |> put_change(:digest, compute_digest(attrs.data))
+    |> validate_required([:digest, :user_id, :data])
+  end
+
+  defp cast_data(schema, attrs) do
+    schema
+    |> cast(attrs, [:endpoint])
+    |> cast_embed(:keys, with: &cast_keys/2)
+    |> validate_required([:endpoint, :keys])
+  end
+
+  defp cast_keys(schema, attrs) do
+    schema
+    |> cast(attrs, [:auth, :p256dh])
+    |> validate_required([:auth, :p256dh])
+  end
+
+  defp compute_digest(data) do
+    :sha256
+    |> :crypto.hash(data)
+    |> Base.encode16()
+  end
+end

lib/mobilizon/users/setting.ex

@@ -14,6 +14,8 @@ defmodule Mobilizon.Users.Setting do
           notification_before_event: boolean,
           notification_pending_participation: NotificationPendingNotificationDelay.t(),
           notification_pending_membership: NotificationPendingNotificationDelay.t(),
+          group_notifications: NotificationPendingNotificationDelay.t(),
+          last_notification_sent: DateTime.t(),
           user: User.t()
         }
 
@@ -25,7 +27,9 @@ defmodule Mobilizon.Users.Setting do
     :notification_each_week,
     :notification_before_event,
     :notification_pending_participation,
-    :notification_pending_membership
+    :notification_pending_membership,
+    :group_notifications,
+    :last_notification_sent
   ]
 
   @attrs @required_attrs ++ @optional_attrs
@@ -47,6 +51,9 @@ defmodule Mobilizon.Users.Setting do
       default: :one_day
     )
 
+    field(:group_notifications, NotificationPendingNotificationDelay, default: :one_day)
+    field(:last_notification_sent, :utc_datetime)
+
     embeds_one :location, Location, on_replace: :update, primary_key: false do
       field(:name, :string)
       field(:range, :integer)

lib/mobilizon/users/users.ex

@@ -13,7 +13,7 @@ defmodule Mobilizon.Users do
   alias Mobilizon.{Crypto, Events}
   alias Mobilizon.Events.FeedToken
   alias Mobilizon.Storage.{Page, Repo}
-  alias Mobilizon.Users.{Setting, User}
+  alias Mobilizon.Users.{PushSubscription, Setting, User}
 
   defenum(UserRole, :user_role, [:administrator, :moderator, :user])
 
@@ -405,6 +405,80 @@ defmodule Mobilizon.Users do
     Setting.changeset(setting, %{})
   end
 
+  @doc """
+  Get a paginated list of all of a user's subscriptions
+  """
+  @spec list_user_push_subscriptions(String.t() | integer(), integer() | nil, integer() | nil) ::
+          Page.t()
+  def list_user_push_subscriptions(user_id, page \\ nil, limit \\ nil) do
+    PushSubscription
+    |> where([p], p.user_id == ^user_id)
+    |> preload([:user])
+    |> Page.build_page(page, limit)
+  end
+
+  @doc """
+  Get a push subscription by their ID
+  """
+  @spec get_push_subscription(String.t() | integer()) :: PushSubscription.t() | nil
+  def get_push_subscription(push_subscription_id) do
+    PushSubscription
+    |> Repo.get(push_subscription_id)
+    |> Repo.preload([:user])
+  end
+
+  @doc """
+  Creates a push subscription.
+
+  ## Examples
+
+      iex> create_push_subscription(%{field: value})
+      {:ok, %PushSubscription{}}
+
+      iex> create_push_subscription(%{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def create_push_subscription(attrs \\ %{}) do
+    %PushSubscription{}
+    |> PushSubscription.changeset(attrs)
+    |> Repo.insert()
+  end
+
+  @doc """
+  Updates a push subscription.
+
+  ## Examples
+
+      iex> update_push_subscription(push_subscription, %{field: new_value})
+      {:ok, %PushSubscription{}}
+
+      iex> update_push_subscription(push_subscription, %{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def update_push_subscription(%PushSubscription{} = push_subscription, attrs) do
+    push_subscription
+    |> PushSubscription.changeset(attrs)
+    |> Repo.update()
+  end
+
+  @doc """
+  Deletes a push subscription.
+
+  ## Examples
+
+      iex> delete_push_subscription(push_subscription)
+      {:ok, %PushSubscription{}}
+
+      iex> delete_push_subscription(push_subscription)
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def delete_push_subscription(%PushSubscription{} = push_subscription) do
+    Repo.delete(push_subscription)
+  end
+
   @spec user_by_email_query(String.t(), boolean | nil, boolean()) :: Ecto.Query.t()
   defp user_by_email_query(email, activated, unconfirmed) do
     User