Add very basic oauth and mastodon api support.

lib/pleroma/web/oauth/authorization.ex

@@ -0,0 +1,30 @@
+defmodule Pleroma.Web.OAuth.Authorization do
+  use Ecto.Schema
+
+  alias Pleroma.{App, User, Repo}
+  alias Pleroma.Web.OAuth.Authorization
+
+  schema "oauth_authorizations" do
+    field :token, :string
+    field :valid_until, :naive_datetime
+    field :used, :boolean, default: false
+    belongs_to :user, Pleroma.User
+    belongs_to :app, Pleroma.App
+
+    timestamps()
+  end
+
+  def create_authorization(%App{} = app, %User{} = user) do
+    token = :crypto.strong_rand_bytes(32) |> Base.url_encode64
+
+    authorization = %Authorization{
+      token: token,
+      used: false,
+      user_id: user.id,
+      app_id: app.id,
+      valid_until: NaiveDateTime.add(NaiveDateTime.utc_now, 60 * 10)
+    }
+
+    Repo.insert(authorization)
+  end
+end