0b4a3601a8
* Refactor User#temp_username * Remove Authentication::Providers dependency from Users::UsernameGenerator * Adds brief description and yard docs
52 lines
1.2 KiB
Ruby
52 lines
1.2 KiB
Ruby
# Generates available username based on
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# multiple generators in the following order:
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# * list of supplied usernames
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# * list of supplied usernames with suffix
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# * random generated letters
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#
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# @todo Extract username validation in separate class
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module Users
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class UsernameGenerator
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def self.call(...)
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new(...).call
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end
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# @param list [Array<String>] a list of usernames
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def initialize(list = [])
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@list = list
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end
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def call
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from_list(modified_list) || from_list(list_with_suffix) || from_list(Array.new(3) { random_letters })
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end
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private
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def from_list(list)
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list.detect { |username| !username_exists?(username) }
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end
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def username_exists?(username)
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User.exists?(username: username) ||
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Organization.exists?(slug: username) ||
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Page.exists?(slug: username) ||
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Podcast.exists?(slug: username)
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end
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def filtered_list
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@list.select { |s| s.is_a?(String) && s.present? }
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end
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def modified_list
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filtered_list.map { |s| s.downcase.gsub(/[^0-9a-z_]/i, "").delete(" ") }
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end
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def list_with_suffix
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modified_list.map { |s| [s, rand(100)].join("_") }
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end
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def random_letters
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("a".."z").to_a.sample(12).join
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end
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end
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end
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