Ruby Phone Number Validator

A Ruby gem for formatting and validating UK phone numbers. Converts various input formats to international format (+44...).

Video of live coding and commentary

Features

• Formats UK phone numbers to international format (+44...)
• Handles multiple input formats: 07..., +44..., 44..., 0...
• Removes spaces, dashes, dots, and parentheses
• Validates phone number length and characters
• Comprehensive error handling

Usage

require_relative 'formatter/phone_number/uk'

# Format various input formats
Formatter::PhoneNumber::UK.format('071234 56789')     # => '+447123456789'
Formatter::PhoneNumber::UK.format('+44 7123 456789')  # => '+447123456789'
Formatter::PhoneNumber::UK.format('447123456789')     # => '+447123456789'

Testing

Run the test suite:

ruby test.rb

Error Handling

The formatter raises specific errors for invalid inputs:

• Formatter::PhoneNumber::Errors::BlankError - for blank or nil inputs
• Formatter::PhoneNumber::Errors::InvalidCharacters - for non-numeric characters
• Formatter::PhoneNumber::Errors::InvalidLengthError - for incorrect length