reaction_count.rb

require 'slack-ruby-client'
require 'byebug'
require 'date'

def count_words(string)
  words = string.split(' ')
  frequency = Hash.new(0)
  words.each { |word| frequency[word.downcase] += 1 }
  frequency
end

token = TOKEN

Slack.configure do |config|
  config.token = token
end

client = Slack::Web::Client.new

messages = []

while messages.empty? || DateTime.strptime(messages.last.ts,'%s') > Date.parse('2017-01-01') do
  messages += messages.any? ?
    client.channels_history(channel: '#watercooler', count: 500, latest: messages.last.ts).messages :
    client.channels_history(channel: '#watercooler', count: 500).messages
  puts messages.count
end

reactions = Hash.new(0)
messages.select { |mess| mess.reactions.present? }.each{ |mess| mess.reactions.each { |reaction| reactions[reaction[:name].split('::').first] += reaction[:count]  } }

puts reactions.sort.inspect
puts "The End"