69 lines
2.6 KiB
Elixir
69 lines
2.6 KiB
Elixir
defmodule AprsmeWeb.TimeHelpers do
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@moduledoc """
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Shared helpers for formatting time and dates in the web layer.
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"""
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use Gettext, backend: AprsmeWeb.Gettext
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@doc """
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Returns a human-readable string for how long ago the given DateTime was.
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"""
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@spec time_ago_in_words(nil | NaiveDateTime.t() | DateTime.t()) :: String.t()
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def time_ago_in_words(nil), do: gettext("unknown time") <> " " <> gettext("ago")
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def time_ago_in_words(%NaiveDateTime{} = naive_datetime) do
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# Convert NaiveDateTime to DateTime assuming UTC
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datetime = DateTime.from_naive!(naive_datetime, "Etc/UTC")
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time_ago_in_words(datetime)
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end
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def time_ago_in_words(datetime) do
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now = DateTime.utc_now()
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diff_seconds = DateTime.diff(now, datetime, :second)
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format_time_diff(diff_seconds) <> " " <> gettext("ago")
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end
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@spec format_time_diff(integer()) :: String.t()
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defp format_time_diff(seconds) when seconds < 60, do: gettext("less than a minute")
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defp format_time_diff(seconds) when seconds < 120, do: gettext("1 minute")
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defp format_time_diff(seconds) when seconds < 3600, do: gettext("%{count} minutes", count: div(seconds, 60))
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defp format_time_diff(seconds) when seconds < 7200, do: gettext("1 hour")
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defp format_time_diff(seconds) when seconds < 86_400, do: gettext("%{count} hours", count: div(seconds, 3600))
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defp format_time_diff(seconds) when seconds < 172_800, do: gettext("1 day")
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defp format_time_diff(seconds) when seconds < 2_592_000, do: gettext("%{count} days", count: div(seconds, 86_400))
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defp format_time_diff(seconds) when seconds < 5_184_000, do: gettext("1 month")
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defp format_time_diff(seconds) when seconds < 31_536_000,
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do: gettext("%{count} months", count: div(seconds, 2_592_000))
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defp format_time_diff(seconds) when seconds < 63_072_000, do: gettext("1 year")
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defp format_time_diff(seconds), do: gettext("%{count} years", count: div(seconds, 31_536_000))
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@doc """
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Converts various timestamp formats into a standard DateTime object.
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Handles ISO 8601 strings, Unix timestamps in milliseconds, and existing
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DateTime or NaiveDateTime structs.
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"""
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@spec to_datetime(String.t() | integer() | DateTime.t() | NaiveDateTime.t() | any()) :: DateTime.t() | nil
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def to_datetime(ts) do
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cond do
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is_binary(ts) ->
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case DateTime.from_iso8601(ts) do
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{:ok, dt, _} -> dt
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_ -> nil
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end
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is_integer(ts) ->
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DateTime.from_unix!(ts, :millisecond)
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match?(%DateTime{}, ts) ->
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ts
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match?(%NaiveDateTime{}, ts) ->
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DateTime.from_naive!(ts, "Etc/UTC")
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true ->
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nil
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end
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end
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end
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