defmodule Lokal.Accounts do @moduledoc """ The Accounts context. """ import Ecto.Query, warn: false alias Lokal.Repo alias Lokal.Accounts.{User, UserNotifier, UserToken} ## Database getters @doc """ Gets a user by email. ## Examples iex> get_user_by_email("foo@example.com") %User{} iex> get_user_by_email("unknown@example.com") nil """ def get_user_by_email(email) when is_binary(email) do Repo.get_by(User, email: email) end @doc """ Gets a user by email and password. ## Examples iex> get_user_by_email_and_password("foo@example.com", "correct_password") %User{} iex> get_user_by_email_and_password("foo@example.com", "invalid_password") nil """ def get_user_by_email_and_password(email, password) when is_binary(email) and is_binary(password) do user = Repo.get_by(User, email: email) if User.valid_password?(user, password), do: user end @doc """ Gets a single user. Raises `Ecto.NoResultsError` if the User does not exist. ## Examples iex> get_user!(123) %User{} iex> get_user!(456) ** (Ecto.NoResultsError) """ def get_user!(id), do: Repo.get!(User, id) ## User registration @doc """ Registers a user. ## Examples iex> register_user(%{field: value}) {:ok, %User{}} iex> register_user(%{field: bad_value}) {:error, %Ecto.Changeset{}} """ def register_user(attrs) do %User{} |> User.registration_changeset(attrs) |> Repo.insert() end @doc """ Returns an `%Ecto.Changeset{}` for tracking user changes. ## Examples iex> change_user_registration(user) %Ecto.Changeset{data: %User{}} """ def change_user_registration(%User{} = user, attrs \\ %{}) do User.registration_changeset(user, attrs, hash_password: false) end ## Settings @doc """ Returns an `%Ecto.Changeset{}` for changing the user email. ## Examples iex> change_user_email(user) %Ecto.Changeset{data: %User{}} """ def change_user_email(user, attrs \\ %{}) do User.email_changeset(user, attrs) end @doc """ Emulates that the email will change without actually changing it in the database. ## Examples iex> apply_user_email(user, "valid password", %{email: ...}) {:ok, %User{}} iex> apply_user_email(user, "invalid password", %{email: ...}) {:error, %Ecto.Changeset{}} """ def apply_user_email(user, password, attrs) do user |> User.email_changeset(attrs) |> User.validate_current_password(password) |> Ecto.Changeset.apply_action(:update) end @doc """ Updates the user email using the given token. If the token matches, the user email is updated and the token is deleted. The confirmed_at date is also updated to the current time. """ def update_user_email(user, token) do context = "change:#{user.email}" with {:ok, query} <- UserToken.verify_change_email_token_query(token, context), %UserToken{sent_to: email} <- Repo.one(query), {:ok, _} <- Repo.transaction(user_email_multi(user, email, context)) do :ok else _ -> :error end end defp user_email_multi(user, email, context) do changeset = user |> User.email_changeset(%{email: email}) |> User.confirm_changeset() Ecto.Multi.new() |> Ecto.Multi.update(:user, changeset) |> Ecto.Multi.delete_all(:tokens, UserToken.user_and_contexts_query(user, [context])) end @doc """ Delivers the update email instructions to the given user. ## Examples iex> deliver_update_email_instructions(user, current_email, &Routes.user_update_email_url(conn, :edit, &1)) {:ok, %{to: ..., body: ...}} """ def deliver_update_email_instructions(%User{} = user, current_email, update_email_url_fun) when is_function(update_email_url_fun, 1) do {encoded_token, user_token} = UserToken.build_email_token(user, "change:#{current_email}") Repo.insert!(user_token) UserNotifier.deliver_update_email_instructions(user, update_email_url_fun.(encoded_token)) end @doc """ Returns an `%Ecto.Changeset{}` for changing the user password. ## Examples iex> change_user_password(user) %Ecto.Changeset{data: %User{}} """ def change_user_password(user, attrs \\ %{}) do User.password_changeset(user, attrs, hash_password: false) end @doc """ Updates the user password. ## Examples iex> update_user_password(user, "valid password", %{password: ...}) {:ok, %User{}} iex> update_user_password(user, "invalid password", %{password: ...}) {:error, %Ecto.Changeset{}} """ def update_user_password(user, password, attrs) do changeset = user |> User.password_changeset(attrs) |> User.validate_current_password(password) Ecto.Multi.new() |> Ecto.Multi.update(:user, changeset) |> Ecto.Multi.delete_all(:tokens, UserToken.user_and_contexts_query(user, :all)) |> Repo.transaction() |> case do {:ok, %{user: user}} -> {:ok, user} {:error, :user, changeset, _} -> {:error, changeset} end end ## Session @doc """ Generates a session token. """ def generate_user_session_token(user) do {token, user_token} = UserToken.build_session_token(user) Repo.insert!(user_token) token end @doc """ Gets the user with the given signed token. """ def get_user_by_session_token(token) do {:ok, query} = UserToken.verify_session_token_query(token) Repo.one(query) end @doc """ Deletes the signed token with the given context. """ def delete_session_token(token) do Repo.delete_all(UserToken.token_and_context_query(token, "session")) :ok end ## Confirmation @doc """ Delivers the confirmation email instructions to the given user. ## Examples iex> deliver_user_confirmation_instructions(user, &Routes.user_confirmation_url(conn, :confirm, &1)) {:ok, %{to: ..., body: ...}} iex> deliver_user_confirmation_instructions(confirmed_user, &Routes.user_confirmation_url(conn, :confirm, &1)) {:error, :already_confirmed} """ def deliver_user_confirmation_instructions(%User{} = user, confirmation_url_fun) when is_function(confirmation_url_fun, 1) do if user.confirmed_at do {:error, :already_confirmed} else {encoded_token, user_token} = UserToken.build_email_token(user, "confirm") Repo.insert!(user_token) UserNotifier.deliver_confirmation_instructions(user, confirmation_url_fun.(encoded_token)) end end @doc """ Confirms a user by the given token. If the token matches, the user account is marked as confirmed and the token is deleted. """ def confirm_user(token) do with {:ok, query} <- UserToken.verify_email_token_query(token, "confirm"), %User{} = user <- Repo.one(query), {:ok, %{user: user}} <- Repo.transaction(confirm_user_multi(user)) do {:ok, user} else _ -> :error end end def confirm_user_multi(user) do Ecto.Multi.new() |> Ecto.Multi.update(:user, User.confirm_changeset(user)) |> Ecto.Multi.delete_all(:tokens, UserToken.user_and_contexts_query(user, ["confirm"])) end ## Reset password @doc """ Delivers the reset password email to the given user. ## Examples iex> deliver_user_reset_password_instructions(user, &Routes.user_reset_password_url(conn, :edit, &1)) {:ok, %{to: ..., body: ...}} """ def deliver_user_reset_password_instructions(%User{} = user, reset_password_url_fun) when is_function(reset_password_url_fun, 1) do {encoded_token, user_token} = UserToken.build_email_token(user, "reset_password") Repo.insert!(user_token) UserNotifier.deliver_reset_password_instructions(user, reset_password_url_fun.(encoded_token)) end @doc """ Gets the user by reset password token. ## Examples iex> get_user_by_reset_password_token("validtoken") %User{} iex> get_user_by_reset_password_token("invalidtoken") nil """ def get_user_by_reset_password_token(token) do with {:ok, query} <- UserToken.verify_email_token_query(token, "reset_password"), %User{} = user <- Repo.one(query) do user else _ -> nil end end @doc """ Resets the user password. ## Examples iex> reset_user_password(user, %{password: "new long password", password_confirmation: "new long password"}) {:ok, %User{}} iex> reset_user_password(user, %{password: "valid", password_confirmation: "not the same"}) {:error, %Ecto.Changeset{}} """ def reset_user_password(user, attrs) do Ecto.Multi.new() |> Ecto.Multi.update(:user, User.password_changeset(user, attrs)) |> Ecto.Multi.delete_all(:tokens, UserToken.user_and_contexts_query(user, :all)) |> Repo.transaction() |> case do {:ok, %{user: user}} -> {:ok, user} {:error, :user, changeset, _} -> {:error, changeset} end end end