webserver-log-analyser/main.rb

# frozen_string_literal: true

require 'date'

logfile = File.open("teambuilder.pt.log")
data = logfile.read
lines = data.split("\n")

# Gets the IP address from the string
# Note: sometimes the function can fetch the UA version as an IP address
def get_line_ip(line)
  pattern = /\b(?:\d{1,3}\.){3}\d{1,3}\b/
  line.match(pattern)[0] if line.match(pattern)
end

# Returns the date in the current line
def get_line_date(line)
  pattern = /\[(.*?)\]/
  match = line.match(pattern)[0] if line.match(pattern)

  Date.parse(match.gsub("[", "").gsub("]", ""))
end

def get_line_code(line)
  pattern = /\s(\d{3})\s/
  line.match(pattern)[1] if line.match(pattern)
end

def get_line_ua(line)
  pattern = /"([^"]*)"$/
  user_agent = line.match(pattern)[0] if line.match(pattern)

  user_agent.gsub('"', '')
end

# Gets the number of times an IP contacted the site
def times_appeared_single(ips, ip_to_check)
  counter = 0
  ips.each do |ip|
    if ip == ip_to_check
      counter += 1
    end
  end
  [counter]
end

ips = []
lines.each do | line |
  previous_ip = ""
  ips << get_line_ip(line)

  puts get_line_ua(line)
end