202 lines
7.6 KiB
Python
202 lines
7.6 KiB
Python
# -*- coding: utf-8 -*-
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import logging
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import simplejson
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import os
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import io
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import base64
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import openerp
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import time
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import random
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import math
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import openerp.addons.hw_proxy.controllers.main as hw_proxy
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import subprocess
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import usb.core
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from openerp.tools.translate import _
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from .. import escpos
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from ..escpos import printer
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from PIL import Image
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from openerp import http
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from openerp.http import request
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from openerp.addons.web.controllers.main import manifest_list, module_boot, html_template
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_logger = logging.getLogger(__name__)
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class EscposDriver(hw_proxy.Proxy):
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supported_printers = [
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{ 'vendor' : 0x04b8, 'product' : 0x0e03, 'name' : 'Epson TM-T20' }
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]
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def connected_usb_devices(self,devices):
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connected = []
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for device in devices:
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if usb.core.find(idVendor=device['vendor'], idProduct=device['product']) != None:
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connected.append(device)
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return connected
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def get_escpos_printer(self):
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printers = self.connected_usb_devices(self.supported_printers)
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if len(printers) > 0:
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return escpos.printer.Usb(printers[0]['vendor'], printers[0]['product'])
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else:
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return None
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@http.route('/hw_proxy/open_cashbox', type='json', auth='admin')
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def open_cashbox(self):
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print 'ESC/POS: OPEN CASHBOX'
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eprint = self.get_escpos_printer()
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if eprint != None:
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eprint.cashdraw(2)
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eprint.cashdraw(5)
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@http.route('/hw_proxy/print_receipt', type='json', auth='admin')
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def print_receipt(self, receipt):
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print 'ESC/POS: PRINT RECEIPT'
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eprint = self.get_escpos_printer()
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if eprint != None:
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self.print_receipt_body(eprint,receipt)
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eprint.cut()
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def print_receipt_body(self,eprint,receipt):
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def check(string):
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return string != True and bool(string) and string.strip()
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def price(amount):
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return ("{0:."+str(receipt['precision']['price'])+"f}").format(amount)
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def money(amount):
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return ("{0:."+str(receipt['precision']['money'])+"f}").format(amount)
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def quantity(amount):
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if math.floor(amount) != amount:
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return ("{0:."+str(receipt['precision']['quantity'])+"f}").format(amount)
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else:
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return str(amount)
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def printline(left, right='', width=40, ratio=0.5, indent=0):
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lwidth = int(width * ratio)
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rwidth = width - lwidth
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lwidth = lwidth - indent
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left = left[:lwidth]
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if len(left) != lwidth:
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left = left + ' ' * (lwidth - len(left))
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right = right[-rwidth:]
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if len(right) != rwidth:
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right = ' ' * (rwidth - len(right)) + right
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return ' ' * indent + left + right + '\n'
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def print_taxes():
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taxes = receipt['tax_details']
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for tax in taxes:
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eprint.text(printline(tax['tax']['name'],price(tax['amount']), width=40,ratio=0.6))
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logo = None
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if receipt['company']['logo']:
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img = receipt['company']['logo']
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img = img[img.find(',')+1:]
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f = io.BytesIO('img')
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f.write(base64.decodestring(img))
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f.seek(0)
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logo_rgba = Image.open(f)
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logo = Image.new('RGB', logo_rgba.size, (255,255,255))
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logo.paste(logo_rgba, mask=logo_rgba.split()[3])
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width = 300
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wfac = width/float(logo_rgba.size[0])
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height = int(logo_rgba.size[1]*wfac)
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logo = logo.resize((width,height), Image.ANTIALIAS)
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# Receipt Header
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if logo:
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eprint._convert_image(logo)
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eprint.text('\n')
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else:
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eprint.set(align='center',type='b',height=2,width=2)
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eprint.text(receipt['company']['name'] + '\n')
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eprint.set(align='center',type='b')
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if check(receipt['shop']['name']):
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eprint.text(receipt['shop']['name'] + '\n')
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if check(receipt['company']['contact_address']):
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eprint.text(receipt['company']['contact address'] + '\n')
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if check(receipt['company']['phone']):
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eprint.text('Tel:' + receipt['company']['phone'] + '\n')
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if check(receipt['company']['vat']):
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eprint.text('VAT:' + receipt['company']['vat'] + '\n')
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if check(receipt['company']['email']):
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eprint.text(receipt['company']['email'] + '\n')
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if check(receipt['company']['website']):
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eprint.text(receipt['company']['website'] + '\n')
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if check(receipt['header']):
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eprint.text(receipt['header']+'\n')
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if check(receipt['cashier']):
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eprint.text('-'*32+'\n')
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eprint.text('Served by '+receipt['cashier']+'\n')
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# Orderlines
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eprint.text('\n\n')
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eprint.set(align='center')
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for line in receipt['orderlines']:
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pricestr = price(line['price_display'])
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if line['discount'] == 0 and line['unit_name'] == 'Unit(s)' and line['quantity'] == 1:
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eprint.text(printline(line['product_name'],pricestr,ratio=0.6))
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else:
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eprint.text(printline(line['product_name'],ratio=0.6))
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if line['discount'] != 0:
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eprint.text(printline('Discount: '+str(line['discount'])+'%', ratio=0.6, indent=2))
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if line['unit_name'] == 'Unit(s)':
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eprint.text( printline( quantity(line['quantity']) + ' x ' + price(line['price']), pricestr, ratio=0.6, indent=2))
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else:
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eprint.text( printline( quantity(line['quantity']) + line['unit_name'] + ' x ' + price(line['price']), pricestr, ratio=0.6, indent=2))
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# Subtotal if the taxes are not included
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taxincluded = True
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if money(receipt['subtotal']) != money(receipt['total_with_tax']):
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eprint.text(printline('','-------'));
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eprint.text(printline(_('Subtotal'),money(receipt['subtotal']),width=40, ratio=0.6))
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print_taxes()
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#eprint.text(printline(_('Taxes'),money(receipt['total_tax']),width=40, ratio=0.6))
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taxincluded = False
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# Total
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eprint.text(printline('','-------'));
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eprint.set(align='center',height=2)
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eprint.text(printline(_(' TOTAL'),money(receipt['total_with_tax']),width=40, ratio=0.6))
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eprint.text('\n\n');
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# Paymentlines
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eprint.set(align='center')
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for line in receipt['paymentlines']:
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eprint.text(printline(line['journal'], money(line['amount']), ratio=0.6))
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eprint.text('\n');
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eprint.set(align='center',height=2)
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eprint.text(printline(_(' CHANGE'),money(receipt['change']),width=40, ratio=0.6))
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eprint.set(align='center')
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eprint.text('\n');
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# Extra Payment info
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if receipt['total_discount'] != 0:
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eprint.text(printline(_('Discounts'),money(receipt['total_discount']),width=40, ratio=0.6))
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if taxincluded:
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print_taxes()
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#eprint.text(printline(_('Taxes'),money(receipt['total_tax']),width=40, ratio=0.6))
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# Footer
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if check(receipt['footer']):
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eprint.text('\n'+receipt['footer']+'\n\n')
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eprint.text(receipt['name']+'\n')
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eprint.text( str(receipt['date']['date']).zfill(2)
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+'/'+ str(receipt['date']['month']+1).zfill(2)
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+'/'+ str(receipt['date']['year']).zfill(4)
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+' '+ str(receipt['date']['hour']).zfill(2)
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+':'+ str(receipt['date']['minute']).zfill(2) )
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