addons/hw_escpos/controllers/main.py

   1 # -*- coding: utf-8 -*-
   2 import commands
   3 import logging
   4 import simplejson
   5 import os
   6 import io
   7 import base64
   8 import openerp
   9 import time
  10 import random
  11 import math
  12 import md5
  13 import openerp.addons.hw_proxy.controllers.main as hw_proxy
  14 import subprocess
  15 import traceback
  16 from threading import Thread, Lock
  17 from Queue import Queue, Empty
  18
  19 try:
  20     import usb.core
  21 except ImportError:
  22     usb = None
  23
  24 try:
  25     from .. import escpos
  26     from ..escpos import printer
  27     from ..escpos import supported_devices
  28 except ImportError:
  29     escpos = printer = None
  30
  31 from PIL import Image
  32
  33 from openerp import http
  34 from openerp.http import request
  35 from openerp.addons.web.controllers.main import manifest_list, module_boot, html_template
  36 from openerp.tools.translate import _
  37
  38 _logger = logging.getLogger(__name__)
  39
  40
  41 class EscposDriver(Thread):
  42     def __init__(self):
  43         Thread.__init__(self)
  44         self.queue = Queue()
  45         self.lock  = Lock()
  46         self.status = {'status':'connecting', 'messages':[]}
  47
  48     def connected_usb_devices(self):
  49         connected = []
  50
  51         for device in supported_devices.device_list:
  52             if usb.core.find(idVendor=device['vendor'], idProduct=device['product']) != None:
  53                 connected.append(device)
  54         return connected
  55
  56     def lockedstart(self):
  57         with self.lock:
  58             if not self.isAlive():
  59                 self.daemon = True
  60                 self.start()
  61
  62     def get_escpos_printer(self):
  63         try:
  64             printers = self.connected_usb_devices()
  65             if len(printers) > 0:
  66                 self.set_status('connected','Connected to '+printers[0]['name'])
  67                 return escpos.printer.Usb(printers[0]['vendor'], printers[0]['product'])
  68             else:
  69                 self.set_status('disconnected','Printer Not Found')
  70                 return None
  71         except Exception as e:
  72             self.set_status('error',str(e))
  73             return None
  74
  75     def get_status(self):
  76         self.push_task('status')
  77         return self.status
  78
  79
  80
  81     def open_cashbox(self,printer):
  82         printer.cashdraw(2)
  83         printer.cashdraw(5)
  84
  85     def set_status(self, status, message = None):
  86         if status == self.status['status']:
  87             if message != None and message != self.status['messages'][-1]:
  88                 self.status['messages'].append(message)
  89         else:
  90             self.status['status'] = status
  91             if message:
  92                 self.status['messages'] = [message]
  93             else:
  94                 self.status['messages'] = []
  95
  96         if status == 'error' and message:
  97             _logger.error('ESC/POS Error: '+message)
  98         elif status == 'disconnected' and message:
  99             _logger.warning('ESC/POS Device Disconnected: '+message)
 100
 101     def run(self):
 102         if not escpos:
 103             _logger.error('ESC/POS cannot initialize, please verify system dependencies.')
 104             return
 105         while True:
 106             try:
 107                 timestamp, task, data = self.queue.get(True)
 108
 109                 printer = self.get_escpos_printer()
 110
 111                 if printer == None:
 112                     if task != 'status':
 113                         self.queue.put((timestamp,task,data))
 114                     time.sleep(5)
 115                     continue
 116                 elif task == 'receipt':
 117                     if timestamp >= time.time() - 1 * 60 * 60:
 118                         self.print_receipt_body(printer,data)
 119                         printer.cut()
 120                 elif task == 'xml_receipt':
 121                     if timestamp >= time.time() - 1 * 60 * 60:
 122                         printer.receipt(data)
 123                 elif task == 'cashbox':
 124                     if timestamp >= time.time() - 12:
 125                         self.open_cashbox(printer)
 126                 elif task == 'printstatus':
 127                     self.print_status(printer)
 128                 elif task == 'status':
 129                     pass
 130
 131             except Exception as e:
 132                 self.set_status('error', str(e))
 133                 errmsg = str(e) + '\n' + '-'*60+'\n' + traceback.format_exc() + '-'*60 + '\n'
 134                 _logger.error(errmsg);
 135
 136     def push_task(self,task, data = None):
 137         self.lockedstart()
 138         self.queue.put((time.time(),task,data))
 139
 140     def print_status(self,eprint):
 141         localips = ['0.0.0.0','127.0.0.1','127.0.1.1']
 142         ips =  [ c.split(':')[1].split(' ')[0] for c in commands.getoutput("/sbin/ifconfig").split('\n') if 'inet addr' in c ]
 143         ips =  [ ip for ip in ips if ip not in localips ]
 144         eprint.text('\n\n')
 145         eprint.set(align='center',type='b',height=2,width=2)
 146         eprint.text('PosBox Status\n')
 147         eprint.text('\n')
 148         eprint.set(align='center')
 149
 150         if len(ips) == 0:
 151             eprint.text('ERROR: Could not connect to LAN\n\nPlease check that the PosBox is correc-\ntly connected with a network cable,\n that the LAN is setup with DHCP, and\nthat network addresses are available')
 152         elif len(ips) == 1:
 153             eprint.text('IP Address:\n'+ips[0]+'\n')
 154         else:
 155             eprint.text('IP Addresses:\n')
 156             for ip in ips:
 157                 eprint.text(ip+'\n')
 158
 159         if len(ips) >= 1:
 160             eprint.text('\nHomepage:\nhttp://'+ips[0]+':8069\n')
 161
 162         eprint.text('\n\n')
 163         eprint.cut()
 164
 165     def print_receipt_body(self,eprint,receipt):
 166
 167         def check(string):
 168             return string != True and bool(string) and string.strip()
 169
 170         def price(amount):
 171             return ("{0:."+str(receipt['precision']['price'])+"f}").format(amount)
 172
 173         def money(amount):
 174             return ("{0:."+str(receipt['precision']['money'])+"f}").format(amount)
 175
 176         def quantity(amount):
 177             if math.floor(amount) != amount:
 178                 return ("{0:."+str(receipt['precision']['quantity'])+"f}").format(amount)
 179             else:
 180                 return str(amount)
 181
 182         def printline(left, right='', width=40, ratio=0.5, indent=0):
 183             lwidth = int(width * ratio)
 184             rwidth = width - lwidth
 185             lwidth = lwidth - indent
 186
 187             left = left[:lwidth]
 188             if len(left) != lwidth:
 189                 left = left + ' ' * (lwidth - len(left))
 190
 191             right = right[-rwidth:]
 192             if len(right) != rwidth:
 193                 right = ' ' * (rwidth - len(right)) + right
 194
 195             return ' ' * indent + left + right + '\n'
 196
 197         def print_taxes():
 198             taxes = receipt['tax_details']
 199             for tax in taxes:
 200                 eprint.text(printline(tax['tax']['name'],price(tax['amount']), width=40,ratio=0.6))
 201
 202         # Receipt Header
 203         if receipt['company']['logo']:
 204             eprint.set(align='center')
 205             eprint.print_base64_image(receipt['company']['logo'])
 206             eprint.text('\n')
 207         else:
 208             eprint.set(align='center',type='b',height=2,width=2)
 209             eprint.text(receipt['company']['name'] + '\n')
 210
 211         eprint.set(align='center',type='b')
 212         if check(receipt['shop']['name']):
 213             eprint.text(receipt['shop']['name'] + '\n')
 214         if check(receipt['company']['contact_address']):
 215             eprint.text(receipt['company']['contact_address'] + '\n')
 216         if check(receipt['company']['phone']):
 217             eprint.text('Tel:' + receipt['company']['phone'] + '\n')
 218         if check(receipt['company']['vat']):
 219             eprint.text('VAT:' + receipt['company']['vat'] + '\n')
 220         if check(receipt['company']['email']):
 221             eprint.text(receipt['company']['email'] + '\n')
 222         if check(receipt['company']['website']):
 223             eprint.text(receipt['company']['website'] + '\n')
 224         if check(receipt['header']):
 225             eprint.text(receipt['header']+'\n')
 226         if check(receipt['cashier']):
 227             eprint.text('-'*32+'\n')
 228             eprint.text('Served by '+receipt['cashier']+'\n')
 229
 230         # Orderlines
 231         eprint.text('\n\n')
 232         eprint.set(align='center')
 233         for line in receipt['orderlines']:
 234             pricestr = price(line['price_display'])
 235             if line['discount'] == 0 and line['unit_name'] == 'Unit(s)' and line['quantity'] == 1:
 236                 eprint.text(printline(line['product_name'],pricestr,ratio=0.6))
 237             else:
 238                 eprint.text(printline(line['product_name'],ratio=0.6))
 239                 if line['discount'] != 0:
 240                     eprint.text(printline('Discount: '+str(line['discount'])+'%', ratio=0.6, indent=2))
 241                 if line['unit_name'] == 'Unit(s)':
 242                     eprint.text( printline( quantity(line['quantity']) + ' x ' + price(line['price']), pricestr, ratio=0.6, indent=2))
 243                 else:
 244                     eprint.text( printline( quantity(line['quantity']) + line['unit_name'] + ' x ' + price(line['price']), pricestr, ratio=0.6, indent=2))
 245
 246         # Subtotal if the taxes are not included
 247         taxincluded = True
 248         if money(receipt['subtotal']) != money(receipt['total_with_tax']):
 249             eprint.text(printline('','-------'));
 250             eprint.text(printline(_('Subtotal'),money(receipt['subtotal']),width=40, ratio=0.6))
 251             print_taxes()
 252             #eprint.text(printline(_('Taxes'),money(receipt['total_tax']),width=40, ratio=0.6))
 253             taxincluded = False
 254
 255
 256         # Total
 257         eprint.text(printline('','-------'));
 258         eprint.set(align='center',height=2)
 259         eprint.text(printline(_('         TOTAL'),money(receipt['total_with_tax']),width=40, ratio=0.6))
 260         eprint.text('\n\n');
 261
 262         # Paymentlines
 263         eprint.set(align='center')
 264         for line in receipt['paymentlines']:
 265             eprint.text(printline(line['journal'], money(line['amount']), ratio=0.6))
 266
 267         eprint.text('\n');
 268         eprint.set(align='center',height=2)
 269         eprint.text(printline(_('        CHANGE'),money(receipt['change']),width=40, ratio=0.6))
 270         eprint.set(align='center')
 271         eprint.text('\n');
 272
 273         # Extra Payment info
 274         if receipt['total_discount'] != 0:
 275             eprint.text(printline(_('Discounts'),money(receipt['total_discount']),width=40, ratio=0.6))
 276         if taxincluded:
 277             print_taxes()
 278             #eprint.text(printline(_('Taxes'),money(receipt['total_tax']),width=40, ratio=0.6))
 279
 280         # Footer
 281         if check(receipt['footer']):
 282             eprint.text('\n'+receipt['footer']+'\n\n')
 283         eprint.text(receipt['name']+'\n')
 284         eprint.text(      str(receipt['date']['date']).zfill(2)
 285                     +'/'+ str(receipt['date']['month']+1).zfill(2)
 286                     +'/'+ str(receipt['date']['year']).zfill(4)
 287                     +' '+ str(receipt['date']['hour']).zfill(2)
 288                     +':'+ str(receipt['date']['minute']).zfill(2) )
 289
 290
 291 driver = EscposDriver()
 292
 293 driver.push_task('printstatus')
 294
 295 hw_proxy.drivers['escpos'] = driver
 296
 297 class EscposProxy(hw_proxy.Proxy):
 298
 299     @http.route('/hw_proxy/open_cashbox', type='json', auth='none', cors='*')
 300     def open_cashbox(self):
 301         _logger.info('ESC/POS: OPEN CASHBOX')
 302         driver.push_task('cashbox')
 303
 304     @http.route('/hw_proxy/print_receipt', type='json', auth='none', cors='*')
 305     def print_receipt(self, receipt):
 306         _logger.info('ESC/POS: PRINT RECEIPT')
 307         driver.push_task('receipt',receipt)
 308
 309     @http.route('/hw_proxy/print_xml_receipt', type='json', auth='none', cors='*')
 310     def print_receipt(self, receipt):
 311         _logger.info('ESC/POS: PRINT XML RECEIPT')
 312         driver.push_task('xml_receipt',receipt)
 313