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