Class: Spout::Commands::Graphs

Inherits:
Object
  • Object
show all
Defined in:
lib/spout/commands/graphs.rb

Instance Method Summary collapse

Constructor Details

#initialize(types, variable_ids, sizes) ⇒ Graphs

Returns a new instance of Graphs.



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# File 'lib/spout/commands/graphs.rb', line 10

def initialize(types, variable_ids, sizes)

  total_index_count = Dir.glob("variables/**/*.json").count

  last_completed = 0

  options_folder = 'graphs'
  FileUtils.mkpath( options_folder )
  tmp_options_file = File.join( options_folder, 'options.json' )

  Dir.glob("csvs/*.csv").each do |csv_file|
    puts "Working on: #{csv_file}"
    t = Time.now
    csv_table = CSV.table(csv_file, encoding: 'iso-8859-1').by_col!
    puts "Loaded #{csv_file} in #{Time.now - t} seconds."

    total_header_count = csv_table.headers.count
    csv_table.headers.each_with_index do |header, index|
      puts "Column #{ index + 1 } of #{ total_header_count } for #{header} in #{csv_file}"
      if variable_file = Dir.glob("variables/**/#{header.downcase}.json", File::FNM_CASEFOLD).first
        json = JSON.parse(File.read(variable_file)) rescue json = nil
        next unless json
        next unless ["choices", "numeric", "integer"].include?(json["type"])
        next unless types.size == 0 or types.include?(json['type'])
        next unless variable_ids.size == 0 or variable_ids.include?(json['id'].to_s.downcase)

        basename = File.basename(variable_file).gsub(/\.json$/, '').downcase
        col_data = csv_table[header]

        case json["type"] when "choices"
          domain_file = Dir.glob("domains/**/#{json['domain']}.json").first
          domain_json = JSON.parse(File.read(domain_file)) rescue domain_json = nil
          next unless domain_json

          create_pie_chart_options_file(col_data, tmp_options_file, domain_json)
        when 'numeric', 'integer'
          create_line_chart_options_file(col_data, tmp_options_file, json["units"])
        else
          next
        end

        run_phantom_js("#{basename}-lg.png", 600, tmp_options_file) if sizes.size == 0 or sizes.include?('lg')
        run_phantom_js("#{basename}.png",     75, tmp_options_file) if sizes.size == 0 or sizes.include?('sm')
      end
    end
  end
  File.delete(tmp_options_file) if File.exists?(tmp_options_file)
end

Instance Method Details

#create_line_chart_options_file(values, options_file, units) ⇒ Object 



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# File 'lib/spout/commands/graphs.rb', line 128

def create_line_chart_options_file(values, options_file, units)
  ( series, categories ) = graph_values(values)

  File.open(options_file, "w") do |outfile|
    outfile.puts <<-eos
      {
        "chart": {
            "type": "areaspline"
        },
        "title": {
          "text": ""
        },
        "credits": {
            "enabled": false,
        },
        "xAxis": {
            "categories": #{categories.to_json},
            "labels": {
                "step": #{(categories.size.to_f / 12).ceil}
            },
            "title": {
                "text": #{units.to_json}
            }
        },
        "yAxis": {
            "maxPadding": 0,
            "minPadding": 0,
            "title": {
              "text": "Count"
            }
        },
        "series": #{series.to_json}
      }
    eos
  end
end

#create_pie_chart_options_file(values, options_file, domain_json) ⇒ Object 



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# File 'lib/spout/commands/graphs.rb', line 98

def create_pie_chart_options_file(values, options_file, domain_json)

  values.select!{|v| !['', 'null'].include?(v.to_s.strip.downcase) }
  counts = values.group_by{|a| a}.collect{|k,v| [(domain_json.select{|h| h['value'] == k.to_s}.first['display_name'] rescue (k.to_s == '' ? 'NULL' : k)), v.count]}

  total_count = counts.collect(&:last).inject(&:+)

  data = counts.collect{|value, count| [value, (count * 100.0 / total_count)]}

  File.open(options_file, "w") do |outfile|
    outfile.puts <<-eos
      {
        "title": {
          "text": ""
        },

        "credits": {
            "enabled": false,
        },
        "series": [{
                  "type": "pie",
                  "name": "",
                  "data": #{data.to_json}
        }]
      }
    eos
  end
end

#graph_values(col_data) ⇒ Object 



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# File 'lib/spout/commands/graphs.rb', line 59

def graph_values(col_data)
  categories = []

  col_data = col_data.select{|v| !['', 'null'].include?(v.to_s.strip.downcase)}.collect(&:to_f)

  all_integers = false
  all_integers = (col_data.count{|i| i.denominator != 1} == 0)

  minimum = col_data.min || 0
  maximum = col_data.max || 100

  default_max_buckets = 30
  max_buckets = all_integers ? [maximum - minimum + 1, default_max_buckets].min : default_max_buckets
  bucket_size = (maximum - minimum + 1).to_f / max_buckets

  (0..(max_buckets-1)).each do |bucket|
    val_min = (bucket_size * bucket) + minimum
    val_max = bucket_size * (bucket + 1) + minimum
    # Greater or equal to val_min, less than val_max
    # categories << "'#{val_min} to #{val_max}'"
    categories << "#{all_integers || (maximum - minimum) > (default_max_buckets / 2)  ? val_min.round : "%0.02f" % val_min}"
  end

  new_values = []
  (0..max_buckets-1).each do |bucket|
    val_min = (bucket_size * bucket) + minimum
    val_max = bucket_size * (bucket + 1) + minimum
    # Greater or equal to val_min, less than val_max
    new_values << col_data.count{|i| i >= val_min and i < val_max}
  end

  values = []

  values << { name: '', data: new_values, showInLegend: false }

  [ values, categories ]
end

#run_phantom_js(png_name, width, tmp_options_file) ⇒ Object 



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# File 'lib/spout/commands/graphs.rb', line 165

def run_phantom_js(png_name, width, tmp_options_file)
  graph_path = File.join(Dir.pwd, 'graphs', png_name)
  directory = File.join( File.dirname(__FILE__), '..', 'support', 'javascripts' )

  open_command = if RUBY_PLATFORM.match(/mingw/) != nil
    'phantomjs.exe'
  else
    'phantomjs'
  end

  phantomjs_command = "#{open_command} #{directory}/highcharts-convert.js -infile #{tmp_options_file} -outfile #{graph_path} -scale 2.5 -width #{width} -constr Chart"
  # puts phantomjs_command
  `#{phantomjs_command}`
end