class MyUniversalJobsMatch

# File lib/myuniversaljobsmatch.rb, line 24
def initialize(filepath: '')

  @filepath = filepath

  @url_base = 'https://findajob.dwp.gov.uk/'
  
  @dx = Dynarex.new 'ujm[title,tags]/item(job_id, title, ' + \
      'description, posting_date, company, location, industries, job_type)'

end

# File lib/myuniversaljobsmatch.rb, line 35
def dynarex()
  @dx
end

# File lib/myuniversaljobsmatch.rb, line 115
def query(id)

  doc = Nokorexi.new(@url_base + 'details/' + id).to_doc    
  
  title = doc.root.text('head/title')
  
  rows = doc.root.xpath('//table[1]/tbody/tr')
  
  h = rows.map do |tr|
    
    [
      tr.text('th').downcase.rstrip[0..-2].gsub(/ +/,'_').to_sym, 
      tr.text('td').to_s
    ]
    
  end.to_h

  h[:description] = doc.root.element('//div[@itemprop="description"]').xml\
      .gsub(/<br *\/> */,"\n").gsub(/<\/?[^\>]+\/?>/,'').strip    
  
  h[:posting_date] = h[:posting_date].to_date
  h[:closing_date] = h[:closing_date].to_date
  
  {title: title}.merge(h)
  
end

# File lib/myuniversaljobsmatch.rb, line 45
def search(title: '', where: '', results_per_page: nil, sort_by: nil, 
           hours: nil, contract_type: nil)
  
  params = {
    adv: 1,
    q: title,
    w: where
  }
  
  params[:pp] = results_per_page if results_per_page
  params[:cty] = contract_type if contract_type
  params[:cti] = hours if hours
  
  if sort_by then
    case sort_by.to_sym
    when :date
      params[:sb] = :date
      params[:sd] = :down
    when :highest_salary
      params[:sb] = :salary
      params[:sd] = :down
    when :lowest_salary
      params[:sb] = :salary      
      params[:sd] = :up
    end
  end
      
  url = @url_base + 'search/?' + params.map {|x| x.join('=') }.join('&')
  doc = Nokorexi.new(url).to_doc    
  
  rows = doc.root.xpath('//div[@class="search-result"]')
  
  a = rows.map do |row|

    items  = row.xpath('ul/li')
    joburl = row.element('h3/a/@href').to_s
    jobtitle = row.element('h3/a/text()')
    jobid = joburl[/\d+$/]
    jobref = title[/^\d+/].to_s

    date = items[0].text.to_date
    company = items[1].text('strong')
    location = items[1].element('span/text()')
    salary = items[2].text('strong') if items[2]
    desc = row.text('p').strip

    [jobid, jobref, date, jobtitle, joburl, company, location, 
     salary, desc]
    
  end


  dx = Dynarex.new('vacancies[title, desc, date, time, tags, xslt]/' + \
           'vacancy(job_id, job_ref, date, title, url, company, location, salary, desc)')

  dx.title = "Find a job - Search results for '#{title}'"
  dx.desc = "generated from web scrape of Find a job." + \
                                              "findajob.dwp.gov.uk/; source: " + url
  dx.tags = 'jobs vacancies jobmatch ' + title.split.first
  dx.date = Time.now.strftime("%Y-%b-%d")
  dx.time = Time.now.strftime("%H:%M")

  a.each do |row|
    dx.create Hash[(%i(job_id job_ref date title url company) + \
                    %i(location salary desc)).zip(row)]
  end

  return dx
end