discourse/lib/primary_group_lookup.rb
Sam Saffron 30990006a9 DEV: enable frozen string literal on all files
This reduces chances of errors where consumers of strings mutate inputs
and reduces memory usage of the app.

Test suite passes now, but there may be some stuff left, so we will run
a few sites on a branch prior to merging
2019-05-13 09:31:32 +08:00

42 lines
932 B
Ruby

# frozen_string_literal: true
class PrimaryGroupLookup
def initialize(user_ids = [])
@user_ids = user_ids.tap(&:compact!).tap(&:uniq!).tap(&:flatten!)
end
# Lookup primary group for a given user id
def [](user_id)
users[user_id]
end
private
def self.lookup_columns
@lookup_columns ||= %i{id name flair_url flair_bg_color flair_color}
end
def users
@users ||= user_lookup_hash
end
def user_lookup_hash
users_with_primary_group = User.where(id: @user_ids)
.where.not(primary_group_id: nil)
.select(:id, :primary_group_id)
group_lookup = {}
group_ids = users_with_primary_group.map(&:primary_group_id)
group_ids.uniq!
Group.where(id: group_ids).select(self.class.lookup_columns)
.each { |g| group_lookup[g.id] = g }
hash = {}
users_with_primary_group.each do |u|
hash[u.id] = group_lookup[u.primary_group_id]
end
hash
end
end