discourse/lib/avatar_lookup.rb

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# frozen_string_literal: true
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class AvatarLookup
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def initialize(user_ids = [])
@user_ids = user_ids.tap(&:compact!).tap(&:uniq!).tap(&:flatten!)
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end
# Lookup a user by id
def [](user_id)
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users[user_id]
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end
private
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def self.lookup_columns
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@lookup_columns ||= %i{id user_emails.email username name uploaded_avatar_id}
end
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def users
@users ||= user_lookup_hash
end
def user_lookup_hash
hash = {}
User.joins(:user_emails)
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.where(id: @user_ids)
.select(AvatarLookup.lookup_columns)
.each { |user| hash[user.id] = user }
hash
end
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end