BlurEmailAddress transforms an email address to reduce exposed personal info.

CheckEmailFormat to check if input string is a correct email address.

CheckLanguageCode checks if a string can be considered as a language code.

CheckPasswordFormat to check if password fulfills password rules.

CreateWeight creates a weighted structure to handle the weighted assignation.

GenerateOTPCode generates a random OTP code of the given length.

GetMainAndOtherProfiles extract main profile ID and secondary profiles from a user account info.

ParseWeeklyWeight parse a string attributing a weight for each day of the week Expected format is a comma separated assignation with [DayName]=Weight with DayName = Mon,Tue,Web,Thu,Frid,Sat,Sun (case insensitive) Weight is a positive integer value or Zero.

Weekday assignation strategy.