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# -*- coding: utf-8 -*-
# Part of Odoo. See LICENSE file for full copyright and licensing details.
from __future__ import print_function
import logging
import math
import os
import os.path
import subprocess
import time
import netifaces as ni
import traceback
escpos = printer = None
try:
from .. escpos import *
from .. escpos.exceptions import *
from .. escpos.printer import Usb
except ImportError:
pass
from queue import Queue
from threading import Thread, Lock
try:
import usb.core
except ImportError:
usb = None
from odoo import http, _
from odoo.addons.hw_drivers.controllers import proxy
_logger = logging.getLogger(__name__)
# workaround https://bugs.launchpad.net/openobject-server/+bug/947231
# related to http://bugs.python.org/issue7980
from datetime import datetime
datetime.strptime('2012-01-01', '%Y-%m-%d')
class EscposDriver(Thread):
def __init__(self):
Thread.__init__(self)
self.queue = Queue()
self.lock = Lock()
self.status = {'status':'connecting', 'messages':[]}
def connected_usb_devices(self):
connected = []
# printers can either define bDeviceClass=7, or they can define one of
# their interfaces with bInterfaceClass=7. This class checks for both.
class FindUsbClass(object):
def __init__(self, usb_class):
self._class = usb_class
def __call__(self, device):
# first, let's check the device
if device.bDeviceClass == self._class:
return True
# transverse all devices and look through their interfaces to
# find a matching class
for cfg in device:
intf = usb.util.find_descriptor(cfg, bInterfaceClass=self._class)
if intf is not None:
return True
return False
printers = usb.core.find(find_all=True, custom_match=FindUsbClass(7))
# if no printers are found after this step we will take the
# first epson or star device we can find.
# epson
if not printers:
printers = usb.core.find(find_all=True, idVendor=0x04b8)
# star
if not printers:
printers = usb.core.find(find_all=True, idVendor=0x0519)
for printer in printers:
try:
description = usb.util.get_string(printer, printer.iManufacturer) + " " + usb.util.get_string(printer, printer.iProduct)
except Exception as e:
_logger.error("Can not get printer description: %s" % e)
description = 'Unknown printer'
connected.append({
'vendor': printer.idVendor,
'product': printer.idProduct,
'name': description
})
return connected
def lockedstart(self):
with self.lock:
if not self.is_alive():
self.daemon = True
self.start()
def get_escpos_printer(self):
printers = self.connected_usb_devices()
if len(printers) > 0:
try:
print_dev = Usb(printers[0]['vendor'], printers[0]['product'])
except HandleDeviceError:
# Escpos printers are now integrated to PrinterDriver, if the IoTBox is printing
# through Cups at the same time, we get an USBError(16, 'Resource busy'). This means
# that the Odoo instance connected to this IoTBox is up to date and no longer uses
# this escpos library.
return None
self.set_status(
'connected',
"Connected to %s (in=0x%02x,out=0x%02x)" % (printers[0]['name'], print_dev.in_ep, print_dev.out_ep)
)
return print_dev
else:
self.set_status('disconnected','Printer Not Found')
return None
def get_status(self):
self.push_task('status')
return self.status
def open_cashbox(self,printer):
printer.cashdraw(2)
printer.cashdraw(5)
def set_status(self, status, message = None):
_logger.info(status+' : '+ (message or 'no message'))
if status == self.status['status']:
if message != None and (len(self.status['messages']) == 0 or message != self.status['messages'][-1]):
self.status['messages'].append(message)
else:
self.status['status'] = status
if message:
self.status['messages'] = [message]
else:
self.status['messages'] = []
if status == 'error' and message:
_logger.error('ESC/POS Error: %s', message)
elif status == 'disconnected' and message:
_logger.warning('ESC/POS Device Disconnected: %s', message)
def run(self):
printer = None
if not escpos:
_logger.error('ESC/POS cannot initialize, please verify system dependencies.')
return
while True:
error = True
timestamp, task, data = self.queue.get(True)
try:
printer = self.get_escpos_printer()
if printer == None:
if task != 'status':
self.queue.put((timestamp,task,data))
error = False
time.sleep(5)
continue
elif task == 'receipt':
if timestamp >= time.time() - 1 * 60 * 60:
self.print_receipt_body(printer,data)
printer.cut()
elif task == 'xml_receipt':
if timestamp >= time.time() - 1 * 60 * 60:
printer.receipt(data)
elif task == 'cashbox':
if timestamp >= time.time() - 12:
self.open_cashbox(printer)
elif task == 'status':
pass
error = False
except NoDeviceError as e:
print("No device found %s" % e)
except HandleDeviceError as e:
printer = None
print("Impossible to handle the device due to previous error %s" % e)
except TicketNotPrinted as e:
print("The ticket does not seems to have been fully printed %s" % e)
except NoStatusError as e:
print("Impossible to get the status of the printer %s" % e)
except Exception as e:
self.set_status('error')
_logger.exception(e)
finally:
if error:
self.queue.put((timestamp, task, data))
if printer:
printer.close()
printer = None
def push_task(self,task, data = None):
self.lockedstart()
self.queue.put((time.time(),task,data))
def print_receipt_body(self,eprint,receipt):
def check(string):
return string != True and bool(string) and string.strip()
def price(amount):
return ("{0:."+str(receipt['precision']['price'])+"f}").format(amount)
def money(amount):
return ("{0:."+str(receipt['precision']['money'])+"f}").format(amount)
def quantity(amount):
if math.floor(amount) != amount:
return ("{0:."+str(receipt['precision']['quantity'])+"f}").format(amount)
else:
return str(amount)
def printline(left, right='', width=40, ratio=0.5, indent=0):
lwidth = int(width * ratio)
rwidth = width - lwidth
lwidth = lwidth - indent
left = left[:lwidth]
if len(left) != lwidth:
left = left + ' ' * (lwidth - len(left))
right = right[-rwidth:]
if len(right) != rwidth:
right = ' ' * (rwidth - len(right)) + right
return ' ' * indent + left + right + '\n'
def print_taxes():
taxes = receipt['tax_details']
for tax in taxes:
eprint.text(printline(tax['tax']['name'],price(tax['amount']), width=40,ratio=0.6))
# Receipt Header
if receipt['company']['logo']:
eprint.set(align='center')
eprint.print_base64_image(receipt['company']['logo'])
eprint.text('\n')
else:
eprint.set(align='center',type='b',height=2,width=2)
eprint.text(receipt['company']['name'] + '\n')
eprint.set(align='center',type='b')
if check(receipt['company']['contact_address']):
eprint.text(receipt['company']['contact_address'] + '\n')
if check(receipt['company']['phone']):
eprint.text('Tel:' + receipt['company']['phone'] + '\n')
if check(receipt['company']['vat']):
eprint.text('VAT:' + receipt['company']['vat'] + '\n')
if check(receipt['company']['email']):
eprint.text(receipt['company']['email'] + '\n')
if check(receipt['company']['website']):
eprint.text(receipt['company']['website'] + '\n')
if check(receipt['header']):
eprint.text(receipt['header']+'\n')
if check(receipt['cashier']):
eprint.text('-'*32+'\n')
eprint.text('Served by '+receipt['cashier']+'\n')
# Orderlines
eprint.text('\n\n')
eprint.set(align='center')
for line in receipt['orderlines']:
pricestr = price(line['price_display'])
if line['discount'] == 0 and line['unit_name'] == 'Units' and line['quantity'] == 1:
eprint.text(printline(line['product_name'],pricestr,ratio=0.6))
else:
eprint.text(printline(line['product_name'],ratio=0.6))
if line['discount'] != 0:
eprint.text(printline('Discount: '+str(line['discount'])+'%', ratio=0.6, indent=2))
if line['unit_name'] == 'Units':
eprint.text( printline( quantity(line['quantity']) + ' x ' + price(line['price']), pricestr, ratio=0.6, indent=2))
else:
eprint.text( printline( quantity(line['quantity']) + line['unit_name'] + ' x ' + price(line['price']), pricestr, ratio=0.6, indent=2))
# Subtotal if the taxes are not included
taxincluded = True
if money(receipt['subtotal']) != money(receipt['total_with_tax']):
eprint.text(printline('', '-------'))
eprint.text(printline(_('Subtotal'),money(receipt['subtotal']),width=40, ratio=0.6))
print_taxes()
#eprint.text(printline(_('Taxes'),money(receipt['total_tax']),width=40, ratio=0.6))
taxincluded = False
# Total
eprint.text(printline('', '-------'))
eprint.set(align='center',height=2)
eprint.text(printline(_(' TOTAL'),money(receipt['total_with_tax']),width=40, ratio=0.6))
eprint.text('\n\n')
# Paymentlines
eprint.set(align='center')
for line in receipt['paymentlines']:
eprint.text(printline(line['journal'], money(line['amount']), ratio=0.6))
eprint.text('\n')
eprint.set(align='center',height=2)
eprint.text(printline(_(' CHANGE'),money(receipt['change']),width=40, ratio=0.6))
eprint.set(align='center')
eprint.text('\n')
# Extra Payment info
if receipt['total_discount'] != 0:
eprint.text(printline(_('Discounts'),money(receipt['total_discount']),width=40, ratio=0.6))
if taxincluded:
print_taxes()
#eprint.text(printline(_('Taxes'),money(receipt['total_tax']),width=40, ratio=0.6))
# Footer
if check(receipt['footer']):
eprint.text('\n'+receipt['footer']+'\n\n')
eprint.text(receipt['name']+'\n')
eprint.text( str(receipt['date']['date']).zfill(2)
+'/'+ str(receipt['date']['month']+1).zfill(2)
+'/'+ str(receipt['date']['year']).zfill(4)
+' '+ str(receipt['date']['hour']).zfill(2)
+':'+ str(receipt['date']['minute']).zfill(2) )
driver = EscposDriver()
proxy.proxy_drivers['escpos'] = driver
class EscposProxy(proxy.ProxyController):
@http.route('/hw_proxy/open_cashbox', type='json', auth='none', cors='*')
def open_cashbox(self):
_logger.info('ESC/POS: OPEN CASHBOX')
driver.push_task('cashbox')
@http.route('/hw_proxy/print_receipt', type='json', auth='none', cors='*')
def print_receipt(self, receipt):
_logger.info('ESC/POS: PRINT RECEIPT')
driver.push_task('receipt',receipt)
@http.route('/hw_proxy/print_xml_receipt', type='json', auth='none', cors='*')
def print_xml_receipt(self, receipt):
_logger.info('ESC/POS: PRINT XML RECEIPT')
driver.push_task('xml_receipt',receipt)
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