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108 lines
2.5 KiB
108 lines
2.5 KiB
class VarianceChartRowPresenter
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include Comparable
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attr_reader :score
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def initialize(measure:, score:)
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@measure = measure
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@score = score.average
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@meets_teacher_threshold = score.meets_teacher_threshold?
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@meets_student_threshold = score.meets_student_threshold?
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end
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def sufficient_data?
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@score != nil
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end
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def measure_name
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@measure.name
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end
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def measure_id
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@measure.measure_id
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end
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def bar_color
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"fill-#{zone.type}"
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end
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def bar_width
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"#{(bar_width_percentage * 100).round(2)}%"
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end
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def x_offset
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case zone.type
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when :ideal, :approval
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'60%'
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else
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"#{((0.6 - bar_width_percentage) * 100).abs.round(2)}%"
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end
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end
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def order
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case zone.type
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when :ideal, :approval
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bar_width_percentage
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when :warning, :watch, :growth
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-bar_width_percentage
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when :insufficient_data
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-100
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end
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end
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def <=>(other)
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other.order <=> order
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end
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def show_partial_data_indicator?
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partial_data_sources.present?
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end
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def partial_data_sources
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[].tap do |sources|
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sources << 'teacher survey results' if @measure.includes_teacher_survey_items? && !@meets_teacher_threshold
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sources << 'student survey results' if @measure.includes_student_survey_items? && !@meets_student_threshold
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sources << 'administrative data' if @measure.includes_admin_data_items?
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end
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end
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private
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IDEAL_ZONE_WIDTH_PERCENTAGE = 0.2
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APPROVAL_ZONE_WIDTH_PERCENTAGE = 0.2
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GROWTH_ZONE_WIDTH_PERCENTAGE = 0.2
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WATCH_ZONE_WIDTH_PERCENTAGE = 0.2
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WARNING_ZONE_WIDTH_PERCENTAGE = 0.2
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def bar_width_percentage
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case zone.type
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when :ideal
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percentage * IDEAL_ZONE_WIDTH_PERCENTAGE + APPROVAL_ZONE_WIDTH_PERCENTAGE
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when :approval
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percentage * APPROVAL_ZONE_WIDTH_PERCENTAGE
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when :growth
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(1 - percentage) * GROWTH_ZONE_WIDTH_PERCENTAGE
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when :watch
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(1 - percentage) * WATCH_ZONE_WIDTH_PERCENTAGE + GROWTH_ZONE_WIDTH_PERCENTAGE
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when :warning
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(1 - percentage) * WARNING_ZONE_WIDTH_PERCENTAGE + WATCH_ZONE_WIDTH_PERCENTAGE + GROWTH_ZONE_WIDTH_PERCENTAGE
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else
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0.0
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end
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end
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def percentage
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(@score - zone.low_benchmark) / (zone.high_benchmark - zone.low_benchmark)
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end
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def zone
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zones = Zones.new(
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watch_low_benchmark: @measure.watch_low_benchmark,
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growth_low_benchmark: @measure.growth_low_benchmark,
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approval_low_benchmark: @measure.approval_low_benchmark,
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ideal_low_benchmark: @measure.ideal_low_benchmark
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)
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zones.zone_for_score(@score)
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end
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end
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