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#!/usr/bin/env ruby |
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# encoding: utf-8 |
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# Outputs a vertical bar chart from date-based JSON data |
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# Requires the JSON rubygem: `[sudo] gem install json` |
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require 'date' |
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require 'open-uri' |
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require 'rubygems' |
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require 'json' |
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# Data source URL (sample output at the end of script) |
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data_url = "http://api.feedpress.it/feeds/..." |
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# Parent container key for data object |
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main_container = 'stats' |
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# Repeated key for date/stats objects |
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date_container = 'day' |
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# keys for amounts to collect |
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total_containers = ['greader','other','direct'] |
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# How many columns to output |
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columns = 30 |
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# Total height will be determined by min and max valudes |
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# scaled to max_rows |
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max_rows = 15 |
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# If "test" is passed as an argument, load test data from end of script |
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if ARGV[0] == "test" || !data_url || data_url.strip == "" |
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input = DATA.read |
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columns = 30 |
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max_rows = 18 |
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main_container = 'stats' |
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date_container = 'day' |
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total_containers = ['greader','other','direct'] |
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else |
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# Otherwise, read data from the data url |
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input = open(URI.parse(data_url)).read |
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end |
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json = JSON.parse(input) |
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# Create two arrays, one for dates and one for totals |
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dates = [] |
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totals = [] |
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# Step through data objects to populate both arrays sequentially |
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json[main_container].each { |day| |
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dates.push(Time.at(day[date_container]).to_datetime.strftime('%m/%d')) |
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total = 0 |
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for item in total_containers |
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total += day[item].to_i |
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end |
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totals.push(total) |
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} |
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# Find the highest and lowest values to determine bar heights |
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max = totals.sort[-1] |
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min = totals.sort[0] |
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# Trim data arrays down to the maximum number of columns |
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# defined above |
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dates = dates.reverse[0..columns] |
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totals = totals.reverse[0..columns] |
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# Determine number or rows to generate |
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topline = max_rows |
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div = max / topline |
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bottomline = min/div |
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# Output each row. If the total for the column is greater |
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# than or equal to the scaled row counter, output a chunk |
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# of the bar |
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topline.times do |
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totals.each { |num| |
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if num / div > topline |
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print "◼ " |
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else |
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print " " |
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end |
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} |
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if topline + (max_rows/10).round == bottomline |
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puts |
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break |
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else |
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topline -= 1 |
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puts |
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end |
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end |
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# Calculate average across all totals |
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avg = totals.inject(0.0) { |sum, el| sum + el } / totals.size |
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# Output a legend with today, peak and average |
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puts "#{dates[0]} - #{dates[-1]} ⇒Today: #{totals[-1]} | Peak: #{max} | Average: #{avg.round}" |
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puts |
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# Sample data for testing |
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__END__ |
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{ |
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"stats": [ |
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{ |
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"day": 1382914800, |
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"greader": 10195, |
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"other": 4409, |
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"direct": 879, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1382824800, |
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"greader": 10174, |
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"other": 4327, |
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"direct": 843, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1382738400, |
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"greader": 10172, |
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"other": 4173, |
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"direct": 861, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1382652000, |
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"greader": 10182, |
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"other": 4195, |
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"direct": 853, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1382565600, |
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"greader": 10163, |
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"other": 4207, |
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"direct": 851, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1382479200, |
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"greader": 10135, |
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"other": 4206, |
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"direct": 839, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1382392800, |
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"greader": 8196, |
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"other": 4437, |
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"direct": 850, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1382306400, |
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"greader": 8181, |
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"other": 4482, |
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"direct": 819, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1382220000, |
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"greader": 9968, |
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"other": 4413, |
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"direct": 858, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1382133600, |
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"greader": 9972, |
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"other": 4413, |
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"direct": 859, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1382047200, |
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"greader": 10050, |
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"other": 4375, |
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"direct": 842, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1381960800, |
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"greader": 10056, |
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"other": 4310, |
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"direct": 821, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1381874400, |
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"greader": 10048, |
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"other": 4153, |
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"direct": 773, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1381788000, |
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"greader": 10052, |
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"other": 4108, |
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"direct": 733, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1381701600, |
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"greader": 10055, |
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"other": 4228, |
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"direct": 701, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1381615200, |
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"greader": 10062, |
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"other": 4371, |
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"direct": 650, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1381528800, |
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"greader": 10079, |
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"other": 4474, |
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"direct": 623, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1381442400, |
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"greader": 10112, |
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"other": 4590, |
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"direct": 584, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1381356000, |
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"greader": 10245, |
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"other": 4789, |
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"direct": 571, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1381269600, |
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"greader": 10150, |
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"other": 5101, |
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"direct": 585, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1381183200, |
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"greader": 10155, |
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"other": 5255, |
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"direct": 583, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1381096800, |
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"greader": 10172, |
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"other": 5266, |
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"direct": 554, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1381010400, |
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"greader": 10201, |
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"other": 5247, |
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"direct": 585, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1380924000, |
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"greader": 10232, |
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"other": 5285, |
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"direct": 582, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1380837600, |
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"greader": 10235, |
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"other": 5349, |
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"direct": 570, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1380751200, |
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"greader": 10267, |
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"other": 5288, |
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"direct": 556, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1380664800, |
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"greader": 10308, |
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"other": 5042, |
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"direct": 540, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1380578400, |
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"greader": 10328, |
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"other": 4828, |
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"direct": 551, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1380492000, |
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"greader": 10364, |
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"other": 4630, |
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"direct": 574, |
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"newsletter": 0 |
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}, |
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{ |
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"day": 1380405600, |
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"greader": 10350, |
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"other": 4479, |
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"direct": 597, |
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"newsletter": 0 |
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} |
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], |
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"code": 1 |
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} |
ttscoff revised this gist