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