47 lines
1.1 KiB
Elixir
47 lines
1.1 KiB
Elixir
defmodule WeewxProxy.Utils do
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@spec parse_integer(String.t()) :: integer() | nil
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def parse_integer(str) when is_binary(str) and byte_size(str) > 0 do
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case Integer.parse(str) do
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{int, ""} -> int
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_error -> nil
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end
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end
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def parse_integer(_), do: nil
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@spec parse_float(String.t() | integer() | float()) :: float() | nil
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def parse_float(str) when is_binary(str) and byte_size(str) > 0 do
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case Float.parse(str) do
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{float, _rem} -> float
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_error -> nil
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end
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end
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def parse_float(float) when is_float(float), do: float
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def parse_float(int) when is_integer(int), do: int / 1.0
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def parse_float(_), do: nil
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@spec utc_timestamp :: non_neg_integer()
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def utc_timestamp do
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:os.system_time(:seconds)
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end
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@spec utc_offset_string(String.t()) :: String.t()
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def utc_offset_string(tz) do
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{:ok, dt} = DateTime.now(tz)
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offset = dt.utc_offset
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if offset > 0 do
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"+#{offset}"
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else
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to_string(offset)
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end
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end
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@spec append_string(String.t(), String.t()) :: String.t()
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def append_string(str, append) do
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str <> append
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end
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end
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