# -*- coding: utf-8 -*- import logging import simplejson import os import io import base64 import openerp import time import random import math import openerp.addons.hw_proxy.controllers.main as hw_proxy import subprocess from threading import Thread from Queue import Queue, Empty try: import usb.core except ImportError: usb = None try: from .. import escpos from ..escpos import printer from ..escpos import supported_devices except ImportError: escpos = printer = None from PIL import Image from openerp import http from openerp.http import request from openerp.addons.web.controllers.main import manifest_list, module_boot, html_template from openerp.tools.translate import _ _logger = logging.getLogger(__name__) class EscposDriver(Thread): def __init__(self): Thread.__init__(self) self.queue = Queue() self.status = {'status':'connecting', 'messages':[]} def connected_usb_devices(self): connected = [] for device in supported_devices.device_list: if usb.core.find(idVendor=device['vendor'], idProduct=device['product']) != None: connected.append(device) return connected def get_escpos_printer(self): try: printers = self.connected_usb_devices() if len(printers) > 0: self.set_status('connected','Connected to '+printers[0]['name']) return escpos.printer.Usb(printers[0]['vendor'], printers[0]['product']) else: self.set_status('disconnected','Printer Not Found') return None except Exception as e: self.set_status('error',str(e)) return None def get_status(self): self.push_task('status') return self.status def open_cashbox(printer): printer.cashdraw(2) printer.cashdraw(5) def set_status(self, status, message = None): if status == self.status['status']: if message != None and 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: '+message) elif status == 'disconnected' and message: _logger.warning('ESC/POS Device Disconnected: '+message) def run(self): self.queue = Queue() while True: try: timestamp, task, data = self.queue.get(True) printer = self.get_escpos_printer() if printer == None: if task != 'status': self.queue.put((timestamp,task,data)) time.sleep(5) continue elif task == 'receipt': if timestamp >= time.time() - 1 * 60 * 60: self.print_receipt_body(printer,data) printer.cut() elif task == 'cashbox': if timestamp >= time.time() * 12: self.open_cashbox(printer) elif task == 'status': pass except Exception as e: self.set_status('error', str(e)) _logger.error(e); def push_task(self,task, data = None): if not self.isAlive(): self.start() 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)) logo = None if receipt['company']['logo']: img = receipt['company']['logo'] img = img[img.find(',')+1:] f = io.BytesIO('img') f.write(base64.decodestring(img)) f.seek(0) logo_rgba = Image.open(f) logo = Image.new('RGB', logo_rgba.size, (255,255,255)) logo.paste(logo_rgba, mask=logo_rgba.split()[3]) width = 300 wfac = width/float(logo_rgba.size[0]) height = int(logo_rgba.size[1]*wfac) logo = logo.resize((width,height), Image.ANTIALIAS) # Receipt Header if logo: eprint._convert_image(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['shop']['name']): eprint.text(receipt['shop']['name'] + '\n') 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'] == 'Unit(s)' 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'] == 'Unit(s)': 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() hw_proxy.drivers['escpos'] = driver class EscposProxy(hw_proxy.Proxy): @http.route('/hw_proxy/open_cashbox', type='json', auth='none') def open_cashbox(self): _logger.info('ESC/POS: OPEN CASHBOX') driver.push_task('cashbox') @http.route('/hw_proxy/print_receipt', type='json', auth='none') def print_receipt(self, receipt): _logger.info('ESC/POS: PRINT RECEIPT') driver.push_task('receipt',receipt)