Module: Tzispa::Helpers::Crawler

Includes:
HashTrans
Defined in:
lib/tzispa/helpers/crawler.rb

Defined Under Namespace

Classes: CrawlerError

Instance Method Summary collapse

Methods included from HashTrans

#hash_fussion!

Instance Method Details

#crawler_save_file(url, dest_file, accept_schemes = ['http', 'https', 'ftp']) ⇒ Object 



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# File 'lib/tzispa/helpers/crawler.rb', line 20

def crawler_save_file(url, dest_file, accept_schemes = ['http', 'https', 'ftp'])
  begin
    uri = URI(url)
    raise ArgumentError.new "Inavlid url: #{url}" unless accept_schemes.include?(uri.scheme) && uri.host
    File.delete(dest_file) if File.exist?(dest_file)
    File.open("#{dest_file}", 'wb') do |fo|
      fo.write open(url).read
    end
  rescue => ex
    raise CrawlerError.new "Error in crawler_save_file '#{url}': #{ex.message}"
  end
end

#crawler_table(noko, table_path, columns) ⇒ Object 



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# File 'lib/tzispa/helpers/crawler.rb', line 66

def crawler_table(noko, table_path, columns)
  Hash.new.tap { |sections|
    htmee = HTMLEntities.new(:expanded)
    noko = noko.xpath(table_path)
    colspans = "td[@colspan=\"#{columns}\"]"
    if noko.xpath(colspans).count == 0
      noko.collect { |row|
        dterm = htmee.decode(row.at_xpath('td[1]')&.content).gsub(/\n|\r|\t/,' ').strip
        unless dterm.empty?
          sections[dterm] ||= Array.new
          sections[dterm] << (2..columns).map { |i|
              ReverseMarkdown.convert(
                htmee.decode(row.at_xpath("td[#{i}]")&.children&.to_s || row.at_xpath("td[#{i}]")&.to_s).strip, unknown_tags: :bypass
              ).gsub(/\r|\t/,' ').strip
          }.join('\n')
        end
      }
    else
      current_section = nil
      noko.collect { |row|
         unless row.xpath(colspans)&.text.strip.empty?
           current_section = htmee.decode(row.xpath("td[@colspan=\"#{columns}\"]").text).gsub(/\n|\r|\t/,' ').strip
           sections[current_section] ||= Array.new
         else
           if current_section
             sections[current_section] << (1..columns).map { |i|
                ReverseMarkdown.convert(
                  htmee.decode(row.at_xpath("td[#{i}]")&.children&.to_s.strip || row.at_xpath("td[#{i}]")&.to_s.strip), unknown_tags: :bypass
                ).strip
             }.join(': ')
           end
         end
       }
    end
  }
end

#crawler_table_to_dl(noko, table_path, columns, excluded_terms: [], fussion_terms: {}) ⇒ Object 



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# File 'lib/tzispa/helpers/crawler.rb', line 42

def crawler_table_to_dl(noko, table_path, columns, excluded_terms: [], fussion_terms:{})
  String.new.tap { |content|
    markdown = Redcarpet::Markdown.new(Redcarpet::Render::HTML.new)
    sections = crawler_table(noko, table_path, columns)
    hash_fussion! sections, fussion_terms
    unless sections.empty?
      content << '<dl>'
      sections.sort.each { |key, value|
        unless key.empty? || value.empty? || excluded_terms.include?(UnicodeUtils.downcase key)
          content << "<dt>#{key}</dt>"
          if value.is_a?(Array) && value.count > 1
            content << '<ul>' << value.map { |item| "<li>#{markdown.render item}</li>"}.join("\n") << '</ul>'
          elsif value.is_a?(Array) && value.count == 1
            content << "<dd>#{markdown.render value.first}</dd>"
          else
            content << "<dd>#{markdown.render value}</dd>"
          end
        end
      }
      content << "</dl>"
    end
  }
end

#crawler_table_to_list(noko, table_path, excluded_terms: []) ⇒ Object 



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# File 'lib/tzispa/helpers/crawler.rb', line 103

def crawler_table_to_list(noko, table_path, excluded_terms: [])
  htmee = HTMLEntities.new(:expanded)
  markdown = Redcarpet::Markdown.new(Redcarpet::Render::HTML.new)
  String.new.tap { |list|
    list << '<ul>'
    list << Array.new.tap { |lines|
      noko.xpath(table_path).collect { |td|
        line = if td.xpath('table/tr/td').count > 0
          crawler_table(td, 'table/tr', 2)
        else
          raw_ln = ReverseMarkdown.convert(td&.children&.to_s.strip, unknown_tags: :bypass)
          raw_ln unless raw_ln.empty? || excluded_terms.include?(raw_ln)
        end
        if line&.is_a? String
          lines << "<li>#{htmee.decode(markdown.render line)}</li>"
        elsif line.is_a? Hash
          line&.map { |key, value|
            lines << "<li><strong>#{key}</strong>: #{value} </li>" unless excluded_terms.include?(key) || excluded_terms.include?(value)
          }.join("\n")
        else
          line&.map { |v|
            lines << "<li>#{v}</li>" unless excluded_terms.include?(v)
          }.join("\n")
        end
      }
    }.join("\n")
    list << '</ul>'
  }
end

#crawler_to_markdown(source) ⇒ Object 



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# File 'lib/tzispa/helpers/crawler.rb', line 33

def crawler_to_markdown(source)
  begin
    source = source.read if source.respond_to? :read
    htmee = HTMLEntities.new
    ReverseMarkdown.convert(htmee.decode(source).strip, unknown_tags: :bypass)
  rescue Encoding::UndefinedConversionError
  end
end