Add password reset.

lib/pleroma/PasswordResetToken.ex

@@ -0,0 +1,44 @@
+defmodule Pleroma.PasswordResetToken do
+  use Ecto.Schema
+
+  import Ecto.{Changeset, Query}
+
+  alias Pleroma.{User, PasswordResetToken, Repo}
+
+  schema "password_reset_tokens" do
+    belongs_to :user, User
+    field :token, :string
+    field :used, :boolean, default: false
+
+    timestamps()
+  end
+
+  def create_token(%User{} = user) do
+    token = :crypto.strong_rand_bytes(32) |> Base.url_encode64
+
+    token = %PasswordResetToken{
+      user_id: user.id,
+      used: false,
+      token: token
+    }
+
+    Repo.insert(token)
+  end
+
+  def used_changeset(struct) do
+    changeset = struct
+    |> cast(%{}, [])
+    |> put_change(:used, true)
+  end
+
+  def reset_password(token, data) do
+    with %{used: false} = token <- Repo.get_by(PasswordResetToken, %{token: token}),
+         %User{} = user <- Repo.get(User, token.user_id),
+         {:ok, user} <- User.reset_password(user, data),
+         {:ok, token} <- Repo.update(used_changeset(token)) do
+      {:ok, token}
+    else
+      _e -> {:error, token}
+    end
+  end
+end