Code for matching between Trainees And Jobs

job.rb

module Matching
  extend ActiveSupport::Concern

  def run_matching trainee
    self.trainee = trainee
    self.matching = {rate: 0}
    self.weight_of_exact = { city: 19.3, course: 13.9, semester: 19.3, languages: 17.4, other_courses: 21.3 }
    self.run
  end

  def run
    self.check :cities
    self.check :courses
    self.check :semester
    self.check :languages
    self.check :other_course
    self.round_rate
    self.matching
  end

  def check type
    case type
    when :cities then check_cities
    when :courses then check_courses
    when :semester then check_semester
    when :languages then check_languages
    when :other_course then check_other_course
    end
  end


  def check_cities
    current_check = self.addresses.select(:id).where(id: self.trainee[:city_ids]).size
    self.matching[:city] = current_check > 0
    self.matching[:rate] += self.weight_of_exact[:city] if current_check > 0
  end

  def check_courses
    included = self.courses_id.include?(self.trainee[:course_id])
    self.matching[:course] = included
    matching[:rate] += weight_of_exact[:course] if included
  end

  def check_semester
    more_then = self.semester >= self.trainee[:semester]
    self.matching[:semester] = more_then
    self.matching[:rate] += self.weight_of_exact[:semester] if more_then
  end

  def check_languages
    current_check = job.languages.select(:title).where(title: self.trainee[:languages]).size
    self.matching[:languages] = current_check > 0
    self.matching[:rate] += self.weight_of_exact[:city] if current_check > 0
  end

  def check_other_course
    current_presence = self.requiriments.present? and trainee[:other_courses]
    self.matching[:other_course] = current_presence
    self.matching[:rate] += self.weight_of_exact[:other_courses] if current_presence
  end

  def round_rate
    self.matching[:rate] = self.matching[:rate].round(2)
  end
end