Class: DisplayData

Inherits:
Object
  • Object
show all
Defined in:
lib/sp500_analyzer/display_data.rb

Class Method Summary collapse

Class Method Details

.display_by_year(year) ⇒ Object 



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# File 'lib/sp500_analyzer/display_data.rb', line 56

def self.display_by_year(year)
  array = DataPoint.all.select do |point|
    point.date.year == year
  end
  self.display_points(array)
end

.display_comparison_info(date_1, date_2) ⇒ Object 



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# File 'lib/sp500_analyzer/display_data.rb', line 109

def self.display_comparison_info(date_1, date_2)
  datapoint1 = DataPoint.find_by_date(date_1)
  datapoint2 = DataPoint.find_by_date(date_2)
  if datapoint1.date > datapoint2.date
    datapoint1 = DataPoint.find_by_date(date_2)
    datapoint2 = DataPoint.find_by_date(date_1)
  end
  difference = datapoint2.price - datapoint1.price
  string_difference = "#{'+' if difference > 0}#{display_price(difference)}"
  high = AnalyzeData.max_within_period(datapoint1,datapoint2)
  low = AnalyzeData.min_within_period(datapoint1,datapoint2)
  puts "-"*50
  puts "1. " + display_datapoint(datapoint1)
  puts "2. " + display_datapoint(datapoint2)
  puts "\nChange in price between #{datapoint1.date.strftime('%m/%d/%Y')} and #{datapoint2.date.strftime('%m/%d/%Y')}:" 
  puts "#{string_difference}"
  puts "\nHighest point between #{datapoint1.date.strftime('%m/%d/%Y')} and #{datapoint2.date.strftime('%m/%d/%Y')}:"
  puts display_datapoint(high)
  puts "\nLowest point between #{datapoint1.date.strftime('%m/%d/%Y')} and #{datapoint2.date.strftime('%m/%d/%Y')}:"
  puts display_datapoint(low)
  puts "-"*50
end

.display_datapoint(datapoint) ⇒ Object 



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# File 'lib/sp500_analyzer/display_data.rb', line 26

def self.display_datapoint(datapoint)
  "Date: #{datapoint.date.strftime('%b-%d-%Y')}     Price: #{display_price(datapoint.price)}"
end

.display_market_crash_info ⇒ Object 



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# File 'lib/sp500_analyzer/display_data.rb', line 82

def self.display_market_crash_info
  puts "A stock market crash may be defined as \"a rapid and often unanticipated decrease in stock prices.\" In order to distinguish crash periods within our data, we must specify the variables of \"rapidness\" (timespan) and \"decrease in stock price\". The decrease in stock price will be set using a percentage value and the timespan will be set using a number of months.\n\n"
  puts "Example: Setting a decline percentage of '20' and a timespan of '12' will provide information for all stock market crashes where the price of the S&P 500 decreased by 20% within 1 year (12 months).\n\n"
  decline = 0
  timespan = 0
  until decline >=1 && decline < 100
    print "Set decrease percentage(1-99): "
    decline = gets.strip.to_i
  end
  until timespan >= 1
    print "Set timespan in months: "
    timespan = gets.strip.to_i
  end
  decline_float = 1.0 - (decline.to_f/100.0)
  market_peaks = AnalyzeData.market_peaks(decline_float, timespan)
  market_bottoms = AnalyzeData.market_crash_mins(decline_float, timespan)
  market_peaks.each_with_index do |peak, index|
    puts "-"*50
    puts "CRASH #{index+1} INFO\n\n"
    crash = Crash.new(peak, market_bottoms[index])
    puts "Market Peak:      " + crash.peak.date.strftime("%B %d, %Y") + " - " + display_price(crash.peak.price)
    puts "Market Trough:    " + crash.bottom.date.strftime("%B %d, %Y") + " - " + display_price(crash.bottom.price)
    puts "Market Recovery:  "+ crash.recovery_point.date.strftime("%B %d, %Y") + " - " + display_price(crash.recovery_point.price)
  end
  puts "-"*50
end

.display_max_by_year ⇒ Object 



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# File 'lib/sp500_analyzer/display_data.rb', line 63

def self.display_max_by_year
  year = ""
  until year == "all" || (year.to_i >= 1871 && year.to_i <= DataPoint.all.last.date.year)
    print "Enter year (or \"all\" to see maximums for all years): "
    year = gets.strip
  end
  if year == "all"
    all_years = (DataPoint.all.first.date.year..DataPoint.all.last.date.year).to_a
    maximums = all_years.map do |year|
      AnalyzeData.annual_max(year)
    end
    display_points(maximums)
  else
    puts "-"*40
    puts display_datapoint(AnalyzeData.annual_max(year.to_i))
    puts "-"*40
  end
end

.display_points(array) ⇒ Object 



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# File 'lib/sp500_analyzer/display_data.rb', line 41

def self.display_points(array)
  puts "-"*40
  array.each do |datapoint|
    puts display_datapoint(datapoint)
    puts "-"*40
  end
end

.display_price(price) ⇒ Object 



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# File 'lib/sp500_analyzer/display_data.rb', line 4

def self.display_price(price)
  if price > 0
    price_string = "$" + sprintf('%.2f', price)
  else
    price_string = "-$" + sprintf('%.2f', price.abs)
  end
  price_string
end

.display_yearly ⇒ Object 



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# File 'lib/sp500_analyzer/display_data.rb', line 49

def self.display_yearly
  array = DataPoint.all.select do |point|
    point.date.month == 1
  end
  self.display_points(array)
end

.extended_info(date) ⇒ Object 



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# File 'lib/sp500_analyzer/display_data.rb', line 30

def self.extended_info(date)
  datapoint = DataPoint.find_by_date(date)
  puts "-"*40
  puts "Date: #{datapoint.date.strftime('%B %d, %Y')}\n\n"
  puts "Price: #{display_price(datapoint.price)}"
  puts "Change over previous month: #{'+' if datapoint.monthly_change > 0}#{display_price(datapoint.monthly_change)}"
  puts "Change over previous year: #{'+' if datapoint.yearly_change > 0}#{display_price(datapoint.yearly_change)}"
  puts "Historical maximum (#{datapoint.historical_max.date.strftime('%m/%d/%Y')}): #{display_price(datapoint.historical_max.price)}"
  puts "-"*40
end

.validate_date(date) ⇒ Object 



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# File 'lib/sp500_analyzer/display_data.rb', line 13

def self.validate_date(date)
  valid = false
  date_array = date.split("/")
  valid = true if date_array[0].to_i >= 1 && date_array[0].to_i <= 12 && date_array[1].to_i >= 1871 && date_array[1].to_i <= DataPoint.all.last.date.year
  valid
end

.validate_year(year) ⇒ Object 



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# File 'lib/sp500_analyzer/display_data.rb', line 20

def self.validate_year(year)
  valid = false
  valid = true if year >= 1871 && year <= DataPoint.all.last.date.year
  valid
end