Masking Personal Information
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Description
You are given a personal information string s, representing either an email address or a phone number. Return the masked personal information using the below rules.
Email address:
An email address is:
- A name consisting of uppercase and lowercase English letters, followed by
- The '@' symbol, followed by
- The domain consisting of uppercase and lowercase English letters with a dot '.' somewhere in the middle (not the first or last character).
To mask an email:
- The uppercase letters in the name and domain must be converted to lowercase letters.
- The middle letters of the name (i.e., all but the first and last letters) must be replaced by 5 asterisks "*****".
Phone number:
A phone number is formatted as follows:
- The phone number contains 10-13 digits.
- The last 10 digits make up the local number.
- The remaining 0-3 digits, in the beginning, make up the country code.
- Separation characters from the set {'+', '-', '(', ')', ' '} separate the above digits in some way.
To mask a phone number:
- Remove all separation characters.
- The masked phone number should have the form:
- "***-***-XXXX" if the country code has 0 digits.
- "+*-***-***-XXXX" if the country code has 1 digit.
- "+**-***-***-XXXX" if the country code has 2 digits.
- "+***-***-***-XXXX" if the country code has 3 digits.
- "XXXX" is the last 4 digits of the local number.
Example 1:
Example 2:
Example 3:
Solution