36 lines
1.2 KiB
Elixir
36 lines
1.2 KiB
Elixir
defmodule OAuth2TokenAgent.TokenRefreshStrategy do
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@moduledoc """
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Module defining a struct for representing strategies for refreshing tokens and
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the functions for applying them
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"""
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@typedoc """
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Struct for the refresh timing strategy for OAuth2 tokens; multiple mechanisms
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## Fields
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* `:every_seconds` - refresh the token if at least the specified number of seconds has elapsed since the last refresh
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* `:seconds_before_expires` - refresh the token if it will expire within the specified number of seconds
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"""
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use TypedStruct
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alias __MODULE__
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typedstruct do
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field(:every_seconds, integer())
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field(:seconds_before_expires, integer())
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end
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@doc """
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Returns true if at least one of the conditions is met and the token should be refreshed
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"""
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@spec refresh_now?(TokenRefreshStrategy.t(), Calendar.datetime(), Calendar.datetime()) ::
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boolean()
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def refresh_now?(strategy, lastRefreshed, expiresAt) do
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(strategy.every_seconds &&
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strategy.every_seconds <= DateTime.diff(DateTime.utc_now(), lastRefreshed)) ||
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(strategy.seconds_before_expires && expiresAt &&
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strategy.seconds_before_expires >= DateTime.diff(expiresAt, DateTime.utc_now()))
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end
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end
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