discourse/lib/avatar_lookup.rb

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582 B
Ruby
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class AvatarLookup
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
@lookup_columns ||= %i{id email username uploaded_avatar_id}
end
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def users
@users ||= user_lookup_hash
end
def user_lookup_hash
# adding tap here is a personal taste thing
hash = {}
User.where(:id => @user_ids)
.select(AvatarLookup.lookup_columns)
.each{ |user| hash[user.id] = user }
hash
end
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end