99 lines
2.6 KiB
Ruby
99 lines
2.6 KiB
Ruby
class UsernameValidator
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# Public: Perform the validation of a field in a given object
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# it adds the errors (if any) to the object that we're giving as parameter
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#
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# object - Object in which we're performing the validation
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# field_name - name of the field that we're validating
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#
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# Example: UsernameValidator.perform_validation(user, 'name')
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def self.perform_validation(object, field_name)
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validator = UsernameValidator.new(object.send(field_name))
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unless validator.valid_format?
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validator.errors.each { |e| object.errors.add(field_name.to_sym, e) }
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end
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end
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def initialize(username)
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@username = username
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@errors = []
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end
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attr_accessor :errors
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attr_reader :username
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def user
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@user ||= User.new(user)
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end
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def valid_format?
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username_exist?
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username_length_min?
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username_length_max?
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username_char_valid?
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username_first_char_valid?
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username_last_char_valid?
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username_no_double_special?
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username_does_not_end_with_confusing_suffix?
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errors.empty?
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end
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CONFUSING_EXTENSIONS ||= /\.(js|json|css|htm|html|xml|jpg|jpeg|png|gif|bmp|ico|tif|tiff|woff)$/i
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private
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def username_exist?
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return unless errors.empty?
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unless username
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self.errors << I18n.t(:'user.username.blank')
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end
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end
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def username_length_min?
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return unless errors.empty?
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if username.length < User.username_length.begin
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self.errors << I18n.t(:'user.username.short', min: User.username_length.begin)
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end
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end
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def username_length_max?
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return unless errors.empty?
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if username.length > User.username_length.end
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self.errors << I18n.t(:'user.username.long', max: User.username_length.end)
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end
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end
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def username_char_valid?
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return unless errors.empty?
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if username =~ /[^\w.-]/
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self.errors << I18n.t(:'user.username.characters')
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end
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end
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def username_first_char_valid?
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return unless errors.empty?
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if username[0] =~ /\W/
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self.errors << I18n.t(:'user.username.must_begin_with_alphanumeric_or_underscore')
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end
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end
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def username_last_char_valid?
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return unless errors.empty?
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if username[-1] =~ /[^A-Za-z0-9]/
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self.errors << I18n.t(:'user.username.must_end_with_alphanumeric')
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end
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end
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def username_no_double_special?
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return unless errors.empty?
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if username =~ /[-_.]{2,}/
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self.errors << I18n.t(:'user.username.must_not_contain_two_special_chars_in_seq')
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end
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end
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def username_does_not_end_with_confusing_suffix?
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return unless errors.empty?
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if username =~ CONFUSING_EXTENSIONS
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self.errors << I18n.t(:'user.username.must_not_end_with_confusing_suffix')
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end
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end
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end
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