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class AutocompleteUsersFinder
# The number of users to display in the results is hardcoded to 20, and
# pagination is not supported. This ensures that performance remains
# consistent and removes the need for implementing keyset pagination to ensure
# good performance.
LIMIT = 20
attr_reader :current_user, :project, :group, :search, :skip_users,
:author_id, :params
def initialize(params:, current_user:, project:, group:)
@current_user = current_user
@project = project
@group = group
@search = params[:search]
@skip_users = params[:skip_users]
@author_id = params[:author_id]
@params = params
end
def execute
items = find_users
items = items.active
items = items.reorder(:name)
items = items.search(search) if search.present?
items = items.where.not(id: skip_users) if skip_users.present?
items = items.limit(LIMIT)
if params[:todo_filter].present? && current_user
items = items.todo_authors(current_user.id, params[:todo_state_filter])
end
if search.blank?
# Include current user if available to filter by "Me"
if params[:current_user].present? && current_user
items = [current_user, *items].uniq
end
if author_id.present? && current_user
author = User.find_by_id(author_id)
items = [author, *items].uniq if author
end
end
items
end
private
def find_users
return users_from_project if project
return group.users_with_parents if group
return User.all if current_user
User.none
end
def users_from_project
if author_id.present?
union = Gitlab::SQL::Union
.new([project.team.users, User.where(id: author_id)])
User.from("(#{union.to_sql}) #{User.table_name}")
else
project.authorized_users
end
end
end
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