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sqm-dashboards/app/models/response_rate_calculator.rb

54 lines
1.2 KiB

# frozen_string_literal: true
class ResponseRateCalculator
TEACHER_RATE_THRESHOLD = 25
STUDENT_RATE_THRESHOLD = 25
attr_reader :subcategory, :school, :academic_year
def initialize(subcategory:, school:, academic_year:)
@subcategory = subcategory
@school = school
@academic_year = academic_year
end
def rate
return 100 if population_data_unavailable?
return 0 unless survey_item_count.positive?
return 0 unless total_possible_responses.positive?
cap_at_one_hundred(raw_response_rate)
end
def meets_student_threshold?
rate >= STUDENT_RATE_THRESHOLD
end
def meets_teacher_threshold?
rate >= TEACHER_RATE_THRESHOLD
end
private
def cap_at_one_hundred(response_rate)
response_rate > 100 ? 100 : response_rate
end
def survey
Survey.find_by(school:, academic_year:)
end
def raw_response_rate
(average_responses_per_survey_item / total_possible_responses.to_f * 100).round
end
def average_responses_per_survey_item
response_count / survey_item_count.to_f
end
def population_data_unavailable?
Respondent.where(school: @school, academic_year: @academic_year).count.zero?
end
end