gistfile1.rb

#encoding utf-8

require 'vkontakte_api'

TOKEN = ''

#https://oauth.vk.com/authorize?client_id=3389744&scope=photos,offline&redirect_uri=http://oauth.vk.com/blank.html&display=page&response_type=token

vk = VkontakteApi::Client.new

group = vk.groups.getById(gid: 'liptonicetea').first

albums = vk.photos.getAlbums(gid: group.gid)

max_activity = -1

top_album = nil
albums.each do |album|
	photos = vk.photos.get(gid: group.gid, aid: album.aid, extended: 1)
	activity = photos.reduce(0){|sum, p| sum+p.likes['count'].to_i+p.comments['count'].to_i}
	if activity>max_activity
		max_activity=activity
		top_album = album
	end
end

return unless top_album

users_activity = {}

photos = vk.photos.get(gid: group.gid, aid: top_album.aid)

likes
photos.each do |photo|
	users = []
	offset = 0
	loop do
		u_likes = vk.likes.getList(type: 'photo', item_id: photo.pid, owner_id: photo.owner_id, count: 1000, offset: offset) #count: 1000 - максимум
		users += u_likes.users
		break unless u_likes['count'].to_i==1000
		offset += 1
	end
	users.each do |uid|
		users_activity[uid] = 0 unless users_activity[uid]
		users_activity[uid]+=1
	end
end

vk = VkontakteApi::Client.new(TOKEN)
#comments
photos.each do |photo|
	#likes
	users = []
	offset = 0
	loop do
		u_comments = vk.photos.getComments(pid: photo.pid, owner_id: photo.owner_id, count: 100, offset: offset) #count: 1000 - максимум
		puts u_comments.inspect
		sleep(0.4)
		users += u_comments.select{|c| c.is_a? Hashie::Mash}.map{|c| c.from_id}
		break unless u_comments.first.to_i==100
		offset += 1
	end
	users.each do |uid|
		users_activity[uid] = 0 unless users_activity[uid]
		users_activity[uid]+=1
	end
end

top_user_activity = users_activity.max_by{|k,v| v}
top_user_id = top_user_activity.first

puts top_user_id