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task-2.rb
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task-2.rb
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# rubocop:disable all
# Deoptimized version of homework task
require 'json'
require 'pry'
require 'date'
require 'ruby-progressbar'
require 'slop'
@opts = Slop.parse do |o|
o.bool '-p', '--progressbar', 'enable progressbar'
o.on '--version', 'print the version' do
puts Slop::VERSION
exit
end
end
class User
attr_reader :attributes, :sessions, :id, :full_name
def initialize(attributes:, sessions:, id:, full_name:)
@attributes = attributes
@sessions = sessions
@id = id
@full_name = full_name
end
end
def parse_user(user)
fields = user.split(',')
parsed_result = {
'id' => fields[1],
'full_name' => fields[2] + ' ' + fields[3],
}
end
def parse_session(session)
fields = session.split(',')
parsed_result = {
'user_id' => fields[1],
'session_id' => fields[2],
'browser' => fields[3],
'time' => fields[4],
'date' => fields[5],
}
end
def collect_stats_from_users(report, users_objects, opts)
progressbar = ProgressBar.create(total: users_objects.count, title: 'Colculate stats:') if opts&.progressbar?
users_objects.each do |user|
user_key = user.full_name
report['usersStats'][user_key] = {}
report['usersStats'][user_key] = calc_stat(user)
progressbar.increment if opts&.progressbar?
end
end
def calc_stat(user)
time = time_from_sesions(user)
user_browsers = browsers_list(user)
is_used_ie = used_ie(user_browsers)
{
'sessionsCount': sessions_count(user),
'totalTime' => total_time(time),
'longestSession' => longest_session(time),
'browsers' => browsers(user_browsers),
'usedIE' => is_used_ie,
'alwaysUsedChrome' => is_used_ie ? false : always_used_chrome(user_browsers),
'dates' => dates(user)
}
end
def sessions_count(user)
user.sessions.count
end
def time_from_sesions(user)
user.sessions.map {|s| s['time'].to_i }
end
def total_time(time)
time.sum.to_s + ' min.'
end
def longest_session(time)
time.max.to_s + ' min.'
end
def browsers_list(user)
user.sessions.map {|s| s['browser'].upcase }.sort
end
def browsers(browsers)
browsers.join(', ')
end
def used_ie(browsers)
browsers.any? { |b| b =~ /INTERNET EXPLORER/ }
end
def always_used_chrome(browsers)
browsers.all? { |b| b.upcase =~ /CHROME/ }
end
def dates(user)
user.sessions.map{|s| s['date'].tr("\n", '') }.sort.reverse
end
def parse_file(file, opts)
users = []
sessions = []
if opts&.progressbar?
lines_count = `wc -l #{file}`.strip.split(' ')[0].to_i
progressbar = ProgressBar.create(total: lines_count, title: 'Read data from file:')
end
File.readlines(file).each do |line|
cols = line.split(',')
users << parse_user(line) if cols[0] == 'user'
sessions << parse_session(line) if cols[0] == 'session'
progressbar.increment if opts&.progressbar?
end
[users, sessions]
end
def count_browsers(sessions, opts)
browsers = []
progressbar = ProgressBar.create(total: sessions.count, title: 'Count uniq browsers:') if opts&.progressbar?
sessions.each do |session|
browsers << session['browser']
progressbar.increment if opts&.progressbar?
end
browsers.uniq
end
def create_users_objects(users, sessions_by_user, opts)
users_objects = []
progressbar = ProgressBar.create(total: users.count, title: 'Create users:') if opts&.progressbar?
users.each do |user|
attributes = user
id = user['id']
full_name = user['full_name']
user_sessions = sessions_by_user[id]
user_object = User.new(attributes: attributes, sessions: user_sessions, id: id, full_name: full_name)
users_objects << user_object
progressbar.increment if opts&.progressbar?
end
users_objects
end
def find_all_browsers(sessions)
sessions
.map { |s| s['browser'] }
.map { |b| b.upcase }
.sort
.uniq
.join(',')
end
def work(file='data.txt', opts=nil)
opts = @opts
users, sessions = parse_file(file, opts)
# Отчёт в json
# - Сколько всего юзеров +
# - Сколько всего уникальных браузеров +
# - Сколько всего сессий +
# - Перечислить уникальные браузеры в алфавитном порядке через запятую и капсом +
#
# - По каждому пользователю
# - сколько всего сессий +
# - сколько всего времени +
# - самая длинная сессия +
# - браузеры через запятую +
# - Хоть раз использовал IE? +
# - Всегда использовал только Хром? +
# - даты сессий в порядке убывания через запятую +
report = {}
report[:totalUsers] = users.count
# Подсчёт количества уникальных браузеров
uniqueBrowsers = count_browsers(sessions, opts)
report['uniqueBrowsersCount'] = uniqueBrowsers.count
report['totalSessions'] = sessions.count
report['allBrowsers'] = find_all_browsers(sessions)
sessions_by_user = sessions.group_by{|h| h["user_id"]}
sessions_by_user.default = []
users_objects = create_users_objects(users, sessions_by_user, opts)
report['usersStats'] = {}
collect_stats_from_users(report, users_objects, opts)
File.write('result.json', "#{report.to_json}\n")
end