44 lines
1.0 KiB
Ruby
44 lines
1.0 KiB
Ruby
module UserNameSuggester
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def self.suggest(name)
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return unless name.present?
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name = parse_name_from_email(name)
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find_available_username_based_on(name)
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end
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private
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def self.parse_name_from_email(name)
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if name =~ User::EMAIL
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# When 'walter@white.com' take 'walter'
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name = Regexp.last_match[1]
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# When 'me@eviltrout.com' take 'eviltrout'
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name = Regexp.last_match[2] if ['i', 'me'].include?(name)
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end
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name
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end
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def self.find_available_username_based_on(name)
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sanitize_username!(name)
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name = rightsize_username(name)
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i = 1
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attempt = name
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until User.username_available?(attempt)
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suffix = i.to_s
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max_length = User.username_length.end - suffix.length - 1
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attempt = "#{name[0..max_length]}#{suffix}"
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i += 1
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end
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attempt
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end
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def self.sanitize_username!(name)
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name.gsub!(/^[^[:alnum:]]+|\W+$/, "")
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name.gsub!(/\W+/, "_")
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end
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def self.rightsize_username(name)
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name.ljust(User.username_length.begin, '1')[0, User.username_length.end]
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end
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end |