Delete the old predictions code

app/services/planting_predictions.rb

@@ -1,81 +0,0 @@
-class PlantingPredictions
-  def initialize(planting)
-    @planting = planting
-  end
-
-  def days_before_finished
-    return 0 if @planting.finished?
-    days = (@planting.finished_at - Date.current).to_i
-    days.positive? ? days : 0
-  end
-
-  def days_before_mature
-    days = ((@planting.planted_at + @planting.days_before_maturity) - Date.current).to_i
-    days.positive? ? days : 0
-  end
-
-  def percentage_grown
-    return nil unless @planting.days_before_maturity && @planting.planted?
-
-    days = (Date.current - @planting.planted_at.to_date).to_f
-
-    return 0 if Date.current < @planting.planted_at
-    return 100 if days > @planting.days_before_maturity
-    percent = (days / @planting.days_before_maturity * 100).to_i
-
-    percent = 100 if percent >= 100
-
-    percent
-  end
-
-  def start_to_finish_diff
-    return unless @planting.finished_at && @planting.planted_at
-    (@planting.finished_at.to_datetime - @planting.planted_at.to_datetime).to_i
-  end
-
-  def time_to_first_harvest
-    return unless @planting.harvested_at && @planting.planted_at
-    (@planting.harvested_at.to_datetime - @planting.planted_at.to_datetime).to_i
-  end
-
-  def predict_days_before_finished
-    # calculate the number of days, from planted_at, until maturity
-    if @planting.planted_at && @planting.finished_at
-      start_to_finish_diff
-    elsif @planting.crop_id
-      plantings = other_finished_plantings_same_crop
-      PlantingPredictions.mean_days_before_finished(plantings)
-    end
-  end
-
-  def self.mean_days_before_finished(plantings)
-    ## Given a set of finished plantings, calculate the average/mean time from start to finish
-    differences = plantings.collect(&:start_to_finish_diff)
-    differences.compact.sum / differences.compact.size unless differences.compact.empty?
-  end
-
-  def self.mean_days_before_first_harvest(plantings)
-    ## Given a set of finished plantings, calculate the average/mean time from start to finish
-    differences = plantings.collect(&:time_to_first_harvest)
-    differences.compact.sum / differences.compact.size unless differences.compact.empty?
-  end
-
-  def predict_harvest
-    days = PlantingPredictions.mean_days_before_first_harvest(other_harvested_plantings_same_crop)
-    @planting.planted_at + days.days unless days.nil?
-  end
-
-  private
-
-  def other_harvested_plantings_same_crop
-    Planting.where(crop_id: @planting.crop_id)
-      .where.not(id: @planting.id)
-      .where.not(harvested_at: nil)
-  end
-
-  def other_finished_plantings_same_crop
-    Planting.where(crop_id: @planting.crop_id)
-      .where.not(id: @planting.id)
-      .where.not(finished_at: nil)
-  end
-end