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25 lines
606 B
Ruby
25 lines
606 B
Ruby
class AvatarLookup
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attr_accessor :user_ids, :users
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def initialize(user_ids=[])
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self.user_ids = AvatarLookup.filtered_users(user_ids)
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end
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# Lookup a user by id
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def [](user_id)
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self.users = AvatarLookup.hashed_users(user_ids) if self.users.nil?
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self.users[user_id]
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end
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private
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def self.filtered_users(user_ids=[])
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user_ids.flatten.tap(&:compact!).tap(&:uniq!)
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end
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def self.hashed_users(user_ids=[])
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users = User.where(:id => user_ids).select([:id, :email, :username])
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users_with_ids = users.collect {|x| [x.id, x] }.flatten
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Hash[*users_with_ids]
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end
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end
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