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50 lines
1.1 KiB
50 lines
1.1 KiB
# frozen_string_literal: true
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class ResponseRateCalculator
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TEACHER_RATE_THRESHOLD = 25
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STUDENT_RATE_THRESHOLD = 25
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attr_reader :subcategory, :school, :academic_year
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def initialize(subcategory:, school:, academic_year:)
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@subcategory = subcategory
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@school = school
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@academic_year = academic_year
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end
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def rate
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return 100 if population_data_unavailable?
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return 0 unless survey_items_have_sufficient_responses?
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return 0 unless total_possible_responses && total_possible_responses.positive?
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cap_at_one_hundred(raw_response_rate).round
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end
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def meets_student_threshold?
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rate >= STUDENT_RATE_THRESHOLD
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end
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def meets_teacher_threshold?
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rate >= TEACHER_RATE_THRESHOLD
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end
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private
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def cap_at_one_hundred(response_rate)
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response_rate > 100 ? 100 : response_rate
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end
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def average_responses_per_survey_item
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response_count / survey_item_count.to_f
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end
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def respondents
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@respondents ||= Respondent.by_school_and_year(school:, academic_year:)
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end
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def population_data_unavailable?
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@population_data_unavailable ||= respondents.nil?
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end
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end
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