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24 lines
720 B
Elm
24 lines
720 B
Elm
module PhoneNumberExample where
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import String
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nums = ['1','2','3','4','5','6','7','8','9','0']
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getNumber : String -> String
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getNumber text = getValidNum (String.filter isDigit text)
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isDigit : Char -> Bool
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isDigit char = List.any (\n -> n == char) nums
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getValidNum : String -> String
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getValidNum num =
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if String.length num == 10 then num else
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if (String.length num == 11) && (String.left 1 num == "1") then String.dropLeft 1 num else
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String.repeat 10 "0"
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printPretty : String -> String
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printPretty input = formatNumber (getNumber input)
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formatNumber : String -> String
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formatNumber input = String.concat ["(", (String.slice 0 3 input), ") ", (String.slice 3 6 input), "-", (String.slice 6 10 input)]
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