aggregations.rb

#!/usr/bin/env ruby

require 'net/http'
require 'json'

class Search
  TOPICS = ["Day 1 - Frontend", "Day 2 - Basic Programming", "Day 3 - Loops & Breaks", "Day 4 - OOP", "Day 5 - Intro to Web with Sinatra & Git", "Day 6 - Intro to Ruby on Rails", "Day 7 - Hackathon I", "Day 08 - Rails, Deployment, Pull requests, Code review", "Day 09 - ActiveRecord", "Day 10 - Rails Testing with RSpec", "Day 11 - Users with Devise & Authorization with CanCan(Can)", "Day 12 - File uploads with Carrierwave", "Day 13 - Javascript 1", "Day 14 - SQL and Relations", "Day 15 - Javascript 2 & JQuery", "Day 16 - AJAX & REST", "Day 17 - Integration testing", "Day 18", "Day 19", "Day 20", "Day 21", "Day 22", "Day 23 - Javascript 3", "Day 24 - React 1", "Day 25 - React 2", "Day 26 - React 3", "Day 27 - Testing with Enzyme", "Day 28. FeathersJS", "Advanced Session :: Introduction to d3", "Advanced Session :: Introduction to Docker", "Advanced Session :: Redux", "Advanced Session :: Styling with Sass", "Codaisseur Cloud", "Git & Github", "Regular expressions", "Shortcuts You Should Know", "Terminal"]
  URL = 'http://localhost:9200/reader/articles/_search'

  def initialize(tag)
    @tag = tag
  end

  def search!
    http = Net::HTTP.new('localhost', 9200)
    response = http.request_post "/reader/articles/_search", query.to_json
    JSON.parse(response.body)
  end

  def query
    {
      aggs: {
        articles: {
          filters: {
            filters: topic_filters
          },
          aggs: {
            @tag => {
              filter: {
                match: {
                  tags: {
                    query: @tag,
                    operator: :and
                  }
                }
              }
            }
          }
        }
      }
    }
  end

  def topic_filters
    filters = {}

    TOPICS.each do |topic|
      filters[topic] = {
        match: {
          topics: {
            query: topic,
            operator: :and
          }
        }
      }
    end

    return filters
  end
end

tag = ARGV.join(" ")

search = Search.new(tag)
results = search.search!

puts
puts "----------------------------------------"
puts "Days with articles tagged '#{tag}'"
puts "----------------------------------------"
puts

results["aggregations"]["articles"]["buckets"].each do |topic, result|
  next if result[tag]["doc_count"] == 0
  puts "#{topic}: #{result[tag]["doc_count"]} / #{result["doc_count"]}"
end

puts