Module: LabInterface

Included in:
AstmServer
Defined in:
lib/ruby_astm/lab_interface.rb

Constant Summary collapse

ACK = 
"\x06"
ENQ = 
"\x05"
STX = 
"\x02"
LF = 
"\x10"
CR = 
"\x13"
ETX = 
"\x03"
EOT = 
"\x04"

Instance Method Summary collapse

Instance Method Details

#checksum(input) ⇒ Object 



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# File 'lib/ruby_astm/lab_interface.rb', line 66

def checksum(input)
  strString = input
  checksum = strString.sum
  b = checksum.to_s(16)
  strCksm = b[-2..-1]
  if strCksm.length < 2 
    for i in strString.length..1
       strCksm = "0" + strCksm
    end
  end
  strCksm.upcase
end

#data_buffer ⇒ Object

buffer of incoming data.



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# File 'lib/ruby_astm/lab_interface.rb', line 38

mattr_accessor :data_buffer

#generate_response ⇒ Object 



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# File 'lib/ruby_astm/lab_interface.rb', line 79

def generate_response
  header_responses = self.headers[-1].build_one_response
  header_responses.each_with_index {|response,key|
    message_checksum = checksum(response + terminator + ETX)
    final_resp = STX + response + terminator + ETX + message_checksum + "\r" 
    final_resp_arr = final_resp.bytes.to_a
    final_resp_arr << 10
    if (self.headers[-1].response_sent == false)
      puts "sending the  data as follows----------------------------------------------"
      puts "response sent is:"
      puts self.headers[-1].response_sent
      puts final_resp_arr.to_s
      puts final_resp_arr.pack('c*').gsub(/\r/,'\n')
      send_data(final_resp_arr.pack('c*')) 
      self.headers[-1].response_sent = true if (key == (header_responses.size - 1))
    else
      puts "sending EOT"
      send_data(EOT)
    end
  }
end

#is_mid_frame_end?(bytes_array) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ruby_astm/lab_interface.rb', line 101

def is_mid_frame_end?(bytes_array)

  ## if you get 13,10,2 anywhere, ignore that and the subsequent digit.
  bytes_indices_to_delete = []
  unless bytes_array.blank?
    bytes_array.each_with_index{|val,key|
      if bytes_array.size >= (key + 2)
        if bytes_array[key..(key+2)] == [13,10,2]
          bytes_indices_to_delete.push(key - 3)
          bytes_indices_to_delete.push(key - 2)
          bytes_indices_to_delete.push(key - 1)
          bytes_indices_to_delete.push(key)
          bytes_indices_to_delete.push(key + 1)
          bytes_indices_to_delete.push(key + 2)
        end
      end
    }
  end
  bytes_indices_to_delete
end

#pre_process_bytes(byte_arr, concat) ⇒ Object 



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# File 'lib/ruby_astm/lab_interface.rb', line 122

def pre_process_bytes(byte_arr,concat)

    puts byte_arr.to_s
    indices_to_delete = is_mid_frame_end?(byte_arr)
    #puts "indices to delete"
    #puts indices_to_delete.to_s

    if self.mid_frame_end_detected == true
      #puts "deletected mid fram is true, so deleting first byte before delete"
      #puts byte_arr.to_s
      byte_arr = byte_arr[1..-1]
      #puts "after deleteing"
      #puts byte_arr.to_s
      self.mid_frame_end_detected = false
    end

    unless indices_to_delete.blank?
      if byte_arr[(indices_to_delete[-1] + 1)]
        #puts "before deleting frame number "
        #puts byte_arr.to_s
        byte_arr.delete_at((indices_to_delete[-1] + 1))
        #puts "after deleting"
        #puts byte_arr.to_s
      else
        self.mid_frame_end_detected = true
      end
    end
    #puts "byte arr before reject"
    byte_arr = byte_arr.reject.with_index{|c,i|  indices_to_delete.include? i}
    

    byte_arr.each do |byte|
      x = [byte].pack('c*').force_encoding('UTF-8')
      if x == "\r"
        concat+="\n"
      elsif x == "\n"
        #puts "new line found --- "
        concat+=x
        #puts "last thing in concat."
        #puts concat[-1].to_s
      else
        concat+=x
      end
    end

    concat

end

#process_text(text) ⇒ Object 



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# File 'lib/ruby_astm/lab_interface.rb', line 291

def process_text(text)
    puts "text is:"
    puts text
    text.split("\n").each do |l|
      puts "doing line:#{l}" 
    line = Line.new({:text => l})
      process_type(line)
    end
end

#process_text_file(full_file_path) ⇒ Object

can process a file which contains ASTM output. this method is added so that you can load previously generated ASTM output into your database it also simplifies testing.



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# File 'lib/ruby_astm/lab_interface.rb', line 49

def process_text_file(full_file_path)
  #full_file_path ||= File.join root,'../test','resources','sysmex_550_sample.txt'
  IO.read(full_file_path).each_line do |line|
    line.split('\\r').each do |txt| 
      process_text(txt)
    end
  end
end

#process_type(line) ⇒ Object 



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# File 'lib/ruby_astm/lab_interface.rb', line 301

def process_type(line)
    case line.type
    when "Hl7_Header"
      hl7_header = Hl7Header.new({:line => line})
      self.headers ||= []
      self.headers << hl7_header
    when "Hl7_Observation"
      unless self.headers.blank?
        unless self.headers[-1].patients.blank?
          unless self.headers[-1].patients[-1].orders[-1].blank?
            hl7_observation = Hl7Observation.new({:line => line})
            self.headers[-1].patients[-1].orders[-1].results[hl7_observation.name] ||= hl7_observation
          end
        end
      end
    when "Hl7_Patient"
      hl7_patient = Hl7Patient.new({:line => line})
      self.headers[-1].patients << hl7_patient
    when "Hl7_Order"
      unless self.headers[-1].patients.blank?
        hl7_order = Hl7Order.new({:line => line, :patient_id => self.headers[-1].patients[-1].patient_id})
        self.headers[-1].patients[-1].orders << hl7_order
      end
    when "Header"
      puts "got header"
      header = Header.new({:line => line})
      self.headers ||= []
      self.headers << header
    when "Query"
      puts "got query"
      query = Query.new({:line => line})
      unless self.headers.blank?
        self.headers[-1].queries << query
      end
    when "Patient"
      puts "got patient."
      patient = Patient.new({:line => line})
      unless self.headers.blank?
        self.headers[-1].patients << patient
      end
    when "Order"
      order = Order.new({:line => line})
      unless self.headers.blank?
        unless self.headers[-1].patients.blank?
          self.headers[-1].patients[-1].orders << order
        end
      end
    when "Result"
      result = Result.new({:line => line})
      unless self.headers.blank?
        unless self.headers[-1].patients.blank?
          unless self.headers[-1].patients[-1].orders[-1].blank?
            self.headers[-1].patients[-1].orders[-1].results[result.name] ||= result
          end
        end
      end
    when "Terminator"
      ## it didn't terminate so there was no commit being called.
      unless self.headers.blank?
        puts "got terminator."
        self.headers[-1].commit
      end
    end
end

#receive_data(data) ⇒ Object 



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# File 'lib/ruby_astm/lab_interface.rb', line 171

def receive_data(data)
    

  begin


    self.data_buffer ||= ''

    #puts "incoming data bytes."

    concat = ""
    
 
    byte_arr = data.bytes.to_a
    self.test_data_bytes ||= []
    self.test_data_bytes.push(byte_arr)
  
    concat = pre_process_bytes(byte_arr,concat)

   
    
    puts "concat is:"
    
    puts concat.to_s
    
    self.data_buffer << concat

    ## if the last byte is EOT, then call process text.
    ## inside that split by line and process one at a time.
    ##process_text(concat)      
    

    if data.bytes.to_a[-1] == 4
      puts "GOT EOT --- PROCESSING BUFFER, AND CLEARING."
      process_text(self.data_buffer)
      #root_path = File.dirname __dir
      #puts "root path #{root_path}"
      #IO.write((File.join root_path,'test','resources','roche_multi_frame_bytes.txt'),self.test_data_bytes.to_s)
      #puts self.test_data_bytes.flatten.to_s
      self.data_buffer = ''
      unless self.headers.blank?
        if self.headers[-1].queries.blank?
          #puts "no queries in header so sending ack after getting EOT and processing the buffer"
          send_data(ACK)
        else
          #puts "sending ENQ"
          send_data(ENQ)
        end
      else
        puts "sending catch all --------------- ACK --------------"
        send_data(ACK)
      end
    elsif data.bytes.to_a[0] == 6
      puts "GOT ACK --- GENERATING RESPONSE"
      unless self.headers.blank?
        header_responses = self.headers[-1].build_one_response({machine_name: self.headers[-1].machine_name})
        ## if no queries then, we have to send ack.
        if header_responses.blank?
          #puts "sending ACK since there are no queries in the header"
          send_data(ACK)
        end
        header_responses.each_with_index {|response,key|
          message_checksum = checksum(response + terminator + ETX)
          final_resp = STX + response + terminator + ETX + message_checksum + "\r" 
          final_resp_arr = final_resp.bytes.to_a
          final_resp_arr << 10
          if (self.headers[-1].response_sent == false)
            #puts "sending the  data as follows----------------------------------------------"
            #puts "response sent is:"
            #puts self.headers[-1].response_sent
            #puts final_resp_arr.pack('c*').gsub(/\r/,'\n')
            send_data(final_resp_arr.pack('c*')) 
            self.headers[-1].response_sent = true if (key == (header_responses.size - 1))
          else
            #puts "sending EOT"
            send_data(EOT)
          end
        }
      else
        #puts "NO HEADERS PRESENT --- "
      end
    elsif data.bytes.to_a[0] == 255
      puts  " ----------- got 255 data -----------, not sending anything back. "
    else
      #unless self.data_buffer.blank?
      #  puts self.data_buffer.gsub(/\r/,'\n').to_s
      #end
      ## send the header 
      #puts "--------- SENT ACK -----------"
      ## strip non utf 8 characters from it.
      self.data_buffer.encode!('UTF-8', 'binary', invalid: :replace, undef: :replace, replace: '')
      if self.data_buffer =~ /MSH\|/
        #puts " -------------- HEADERS ARE BLANK WITH HL7, sending ack. ------------ "
        process_text(self.data_buffer)
        self.data_buffer = ''
        if self.headers.size > 0
          self.headers[-1].commit
          send_data(self.headers[-1].generate_ack_success_response)
        end
      else
        #puts " -------------- HEADERS ARE BLANK NOT HL7, sending ack. ------------ "
        send_data(ACK)
      end
    end

  rescue => e
    
    #self.headers = []
    AstmServer.log("data was: " + self.data_buffer + "error is:" + e.backtrace.to_s)
    #send_data(EOT)
  end

end

#root ⇒ Object

returns the root directory of the gem.



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# File 'lib/ruby_astm/lab_interface.rb', line 42

def root
    File.dirname __dir__
end

#send_enq ⇒ Object 



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# File 'lib/ruby_astm/lab_interface.rb', line 285

def send_enq
  #puts "enq as bytes is:"
  #puts ENQ.unpack('c*')
  send_data(ENQ)
end

#terminator ⇒ Object 



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# File 'lib/ruby_astm/lab_interface.rb', line 61

def terminator
  "L|1|N\r"
end

#test_data_bytes ⇒ Object

gather bytes to store for us to test.



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# File 'lib/ruby_astm/lab_interface.rb', line 29

mattr_accessor :test_data_bytes

#unbind ⇒ Object

1.STX + response + LF + ETX 2.response 3.STX + response + “L|1|Nr” + ETX 4.response + “L|1|Nr”



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# File 'lib/ruby_astm/lab_interface.rb', line 372

def unbind
   puts "-- someone disconnected from the echo server!"
end