chore: remove student loader since we load race information in data loader

app/services/student_loader.rb

@@ -1,107 +0,0 @@
-# frozen_string_literal: true
-
-require 'csv'
-
-class StudentLoader
-  def self.load_data(filepath:, rules: [])
-    File.open(filepath) do |file|
-      headers = file.first
-      headers_array = headers.split(',')
-
-      file.lazy.each_slice(1_000) do |lines|
-        CSV.parse(lines.join, headers:).map do |row|
-          next if rules.any? do |rule|
-            rule.new(row: SurveyItemValues.new(row:, headers: headers_array, genders: nil, survey_items: nil,
-                                                       schools:)).skip_row?
-                  end
-
-          process_row(row:)
-        end
-      end
-    end
-  end
-
-  def self.from_file(file:, rules: [])
-    headers = file.gets
-    headers_array = headers.split(',')
-
-    survey_item_responses = []
-    until file.eof?
-      line = file.gets
-      next unless line.present?
-
-      CSV.parse(line, headers:).map do |row|
-        next if rules.any? do |rule|
-                  rule.new(row: SurveyItemValues.new(row:, headers: headers_array, genders: nil, survey_items: nil,
-                                                     schools:)).skip_row?
-                end
-
-        process_row(row:)
-      end
-
-    end
-  end
-
-  def self.process_row(row:)
-    races = process_races(codes: race_codes(row:))
-    response_id = row['ResponseId'] || row['Responseid'] || row['ResponseID'] ||
-                  row['Response ID'] || row['Response id'] || row['Response Id']
-    lasid = row['LASID'] || row['lasid']
-
-    find_or_create_student(response_id:, lasid:, races:)
-  end
-
-  def self.schools
-    @schools ||= School.all.map { |school| [school.dese_id, school] }.to_h
-  end
-
-  def self.race_codes(row:)
-    race_codes = row['race'] || row['RACE'] || row['Race'] || '99'
-    race_codes.split(',').map(&:to_i) || []
-  end
-
-  def self.assign_student_to_responses(student:, response_id:)
-    responses = SurveyItemResponse.where(response_id:)
-    loadable_responses = responses.map do |response|
-      response.student = student
-      response
-    end
-
-    SurveyItemResponse.import(loadable_responses.flatten.compact, batch_size: 1_000, on_duplicate_key_update: :all)
-  end
-
-  def self.find_or_create_student(response_id:, lasid:, races:)
-    student = Student.find_or_create_by(response_id:, lasid:)
-    student.races.delete_all
-    races.map do |race|
-      student.races << race
-    end
-    assign_student_to_responses(student:, response_id:)
-  end
-
-  def self.process_races(codes:)
-    races = codes.map do |code|
-      code = code.to_i
-      code = 99 if [6, 7].include?(code) || code.nil? || code.zero?
-      Race.find_by_qualtrics_code(code)
-    end.uniq
-    races = add_unknown_race_if_other_races_missing(races:)
-    races = remove_unknown_race_if_other_races_present(races:)
-    add_multiracial_designation(races:)
-  end
-
-  def self.remove_unknown_race_if_other_races_present(races:)
-    races.delete(Race.find_by_qualtrics_code(99)) if races.length > 1
-    races
-  end
-
-  def self.add_multiracial_designation(races:)
-    races << Race.find_by_qualtrics_code(100) if races.length > 1
-    races
-  end
-
-  def self.add_unknown_race_if_other_races_missing(races:)
-    races << Race.find_by_qualtrics_code(99) if races.length == 0
-    races
-  end
-end