cannery/lib/cannery/invites.ex

157 lines
3.9 KiB
Elixir

defmodule Cannery.Invites do
@moduledoc """
The Invites context.
"""
import Ecto.Query, warn: false
alias Cannery.{Accounts.User, Invites.Invite, Repo}
alias Ecto.Changeset
@invite_token_length 20
@doc """
Returns the list of invites.
## Examples
iex> list_invites(%User{id: 123, role: :admin})
[%Invite{}, ...]
"""
@spec list_invites(User.t()) :: [Invite.t()]
def list_invites(%User{role: :admin}) do
Repo.all(from i in Invite, order_by: i.name)
end
@doc """
Gets a single invite.
Raises `Ecto.NoResultsError` if the Invite does not exist.
## Examples
iex> get_invite!(123, %User{id: 123, role: :admin})
%Invite{}
iex> get_invite!(456, %User{id: 123, role: :admin})
** (Ecto.NoResultsError)
"""
@spec get_invite!(Invite.id(), User.t()) :: Invite.t()
def get_invite!(id, %User{role: :admin}) do
Repo.get!(Invite, id)
end
@doc """
Returns a valid invite or nil based on the attempted token
## Examples
iex> get_invite_by_token("valid_token")
%Invite{}
iex> get_invite_by_token("invalid_token")
nil
"""
@spec get_invite_by_token(token :: String.t() | nil) :: Invite.t() | nil
def get_invite_by_token(nil), do: nil
def get_invite_by_token(""), do: nil
def get_invite_by_token(token) do
Repo.one(
from(i in Invite,
where: i.token == ^token and i.disabled_at |> is_nil()
)
)
end
@doc """
Uses invite by decrementing uses_left, or marks invite invalid if it's been
completely used.
"""
@spec use_invite!(Invite.t()) :: Invite.t()
def use_invite!(%Invite{uses_left: nil} = invite), do: invite
def use_invite!(%Invite{uses_left: uses_left} = invite) do
new_uses_left = uses_left - 1
attrs =
if new_uses_left <= 0 do
now = NaiveDateTime.utc_now() |> NaiveDateTime.truncate(:second)
%{"uses_left" => 0, "disabled_at" => now}
else
%{"uses_left" => new_uses_left}
end
invite |> Invite.update_changeset(attrs) |> Repo.update!()
end
@doc """
Creates a invite.
## Examples
iex> create_invite(%User{id: 123, role: :admin}, %{field: value})
{:ok, %Invite{}}
iex> create_invite(%User{id: 123, role: :admin}, %{field: bad_value})
{:error, %Changeset{}}
"""
@spec create_invite(User.t(), attrs :: map()) ::
{:ok, Invite.t()} | {:error, Changeset.t(Invite.new_invite())}
def create_invite(%User{role: :admin} = user, attrs) do
token =
:crypto.strong_rand_bytes(@invite_token_length)
|> Base.url_encode64()
|> binary_part(0, @invite_token_length)
%Invite{} |> Invite.create_changeset(user, token, attrs) |> Repo.insert()
end
@doc """
Updates a invite.
## Examples
iex> update_invite(invite, %{field: new_value}, %User{id: 123, role: :admin})
{:ok, %Invite{}}
iex> update_invite(invite, %{field: bad_value}, %User{id: 123, role: :admin})
{:error, %Changeset{}}
"""
@spec update_invite(Invite.t(), attrs :: map(), User.t()) ::
{:ok, Invite.t()} | {:error, Changeset.t(Invite.t())}
def update_invite(invite, attrs, %User{role: :admin}),
do: invite |> Invite.update_changeset(attrs) |> Repo.update()
@doc """
Deletes a invite.
## Examples
iex> delete_invite(invite, %User{id: 123, role: :admin})
{:ok, %Invite{}}
iex> delete_invite(invite, %User{id: 123, role: :admin})
{:error, %Changeset{}}
"""
@spec delete_invite(Invite.t(), User.t()) ::
{:ok, Invite.t()} | {:error, Changeset.t(Invite.t())}
def delete_invite(invite, %User{role: :admin}), do: invite |> Repo.delete()
@doc """
Deletes a invite.
## Examples
iex> delete_invite(invite, %User{id: 123, role: :admin})
%Invite{}
"""
@spec delete_invite!(Invite.t(), User.t()) :: Invite.t()
def delete_invite!(invite, %User{role: :admin}), do: invite |> Repo.delete!()
end