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add sane maximum value to relative date parser, fixes #43

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byte[] 2020-03-31 13:14:16 -04:00
parent 2b99afb746
commit f6f29840ca
1 changed files with 16 additions and 6 deletions
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22
lib/search/date_parser.ex
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@ -90,13 +90,23 @@ defmodule Search.DateParser do
end
end
defp relative_datetime([count, scale]) do
now = DateTime.utc_now()
defp relative_datetime(_rest, [count, scale], context, _line, _offset) do
millenium_seconds = 31_536_000_000
lower = DateTime.add(now, (count + 1) * -scale, :second)
upper = DateTime.add(now, count * -scale, :second)
case count * scale <= millenium_seconds do
true ->
now = DateTime.utc_now()
[lower, upper]
lower = DateTime.add(now, (count + 1) * -scale, :second)
upper = DateTime.add(now, count * -scale, :second)
{[[lower, upper]], context}
_false ->
{:error, "invalid date format in input; requested time #{
count*scale
} seconds is over a millenium ago"}
end
end
space =
@ -175,7 +185,7 @@ defmodule Search.DateParser do
])
|> ignore(string(" ago"))
|> eos()
|> reduce(:relative_datetime)
|> post_traverse(:relative_datetime)
|> unwrap_and_tag(:date)
date =