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42 lines
1.6 KiB
42 lines
1.6 KiB
class Report
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@@years = Bike.all.each.map{|bike| bike.date_sold.year if bike.date_sold}
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def self.bikes_fixed_per_week
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beginning_of_year = Time.now.beginning_of_year
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bikes = Bike.where("fixed_at > ? AND purpose = ?", beginning_of_year, Bike::SALE)
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weekly_data = bikes.group_by{|b| b.fixed_at.beginning_of_week}
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weekly_data.to_a.sort!{|a, b| a.first <=> b.first}.to_h
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end
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def self.bikes_sold_per_year
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counts = Hash.new(0)
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@@years.each { |year| counts[year] += 1 }
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counts
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end
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def self.average_price_per_year
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prices = Bike.all.each.map{|bike| bike.price}
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years_prices = @@years.each_with_index.map{|year, index| {prices[index].to_s.to_sym => year}}
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merged_years_prices = years_prices.reduce({}, :merge)
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years_prices_grouped = merged_years_prices.group_by{|k, v| v}
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average_price_array = years_prices_grouped.each.map{ |k, year_values|
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year_prices = year_values.each.map{|pair| pair[0]}
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float_prices = year_prices.map{|price| price.to_s.to_f}
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average_price = float_prices.inject{ |sum, el| el + sum } / float_prices.size
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{k => average_price}
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}
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average_price_array.reduce({}, :merge)
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end
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def self.yearly_data
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unique_years = @@years.uniq
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bikes_sold_per_year = Report.bikes_sold_per_year()
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average_price_per_year = Report.average_price_per_year()
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yearly_data_array = unique_years.map{|year| {year => {number: bikes_sold_per_year[year], average_price: average_price_per_year[year]}}}
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yearly_data = yearly_data_array.reduce({}, :merge)
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yearly_data.delete(nil)
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Hash[yearly_data.sort]
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end
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end
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