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