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# -*- coding: utf-8 -*-
# Part of Odoo. See LICENSE file for full copyright and licensing details.
from base64 import b64decode
from cups import IPPError, IPP_PRINTER_IDLE, IPP_PRINTER_PROCESSING, IPP_PRINTER_STOPPED
import dbus
import io
import logging
import netifaces as ni
import os
from PIL import Image, ImageOps
import re
import subprocess
import tempfile
from uuid import getnode as get_mac
from odoo import http
from odoo.addons.hw_drivers.connection_manager import connection_manager
from odoo.addons.hw_drivers.controllers.proxy import proxy_drivers
from odoo.addons.hw_drivers.driver import Driver
from odoo.addons.hw_drivers.event_manager import event_manager
from odoo.addons.hw_drivers.iot_handlers.interfaces.PrinterInterface import PPDs, conn, cups_lock
from odoo.addons.hw_drivers.main import iot_devices
from odoo.addons.hw_drivers.tools import helpers
_logger = logging.getLogger(__name__)
RECEIPT_PRINTER_COMMANDS = {
'star': {
'center': b'\x1b\x1d\x61\x01', # ESC GS a n
'cut': b'\x1b\x64\x02', # ESC d n
'title': b'\x1b\x69\x01\x01%s\x1b\x69\x00\x00', # ESC i n1 n2
'drawers': [b'\x07', b'\x1a'] # BEL & SUB
},
'escpos': {
'center': b'\x1b\x61\x01', # ESC a n
'cut': b'\x1d\x56\x41\n', # GS V m
'title': b'\x1b\x21\x30%s\x1b\x21\x00', # ESC ! n
'drawers': [b'\x1b\x3d\x01', b'\x1b\x70\x00\x19\x19', b'\x1b\x70\x01\x19\x19'] # ESC = n then ESC p m t1 t2
}
}
def cups_notification_handler(message, uri, device_identifier, state, reason, accepting_jobs):
if device_identifier in iot_devices:
reason = reason if reason != 'none' else None
state_value = {
IPP_PRINTER_IDLE: 'connected',
IPP_PRINTER_PROCESSING: 'processing',
IPP_PRINTER_STOPPED: 'stopped'
}
iot_devices[device_identifier].update_status(state_value[state], message, reason)
# Create a Cups subscription if it doesn't exist yet
try:
conn.getSubscriptions('/printers/')
except IPPError:
conn.createSubscription(
uri='/printers/',
recipient_uri='dbus://',
events=['printer-state-changed']
)
# Listen for notifications from Cups
bus = dbus.SystemBus()
bus.add_signal_receiver(cups_notification_handler, signal_name="PrinterStateChanged", dbus_interface="org.cups.cupsd.Notifier")
class PrinterDriver(Driver):
connection_type = 'printer'
def __init__(self, identifier, device):
super(PrinterDriver, self).__init__(identifier, device)
self.device_type = 'printer'
self.device_connection = device['device-class'].lower()
self.device_name = device['device-make-and-model']
self.state = {
'status': 'connecting',
'message': 'Connecting to printer',
'reason': None,
}
self.send_status()
self.receipt_protocol = 'star' if 'STR_T' in device['device-id'] else 'escpos'
if 'direct' in self.device_connection and any(cmd in device['device-id'] for cmd in ['CMD:STAR;', 'CMD:ESC/POS;']):
self.print_status()
@classmethod
def supported(cls, device):
if device.get('supported', False):
return True
protocol = ['dnssd', 'lpd', 'socket']
if any(x in device['url'] for x in protocol) and device['device-make-and-model'] != 'Unknown' or 'direct' in device['device-class']:
model = cls.get_device_model(device)
ppdFile = ''
for ppd in PPDs:
if model and model in PPDs[ppd]['ppd-product']:
ppdFile = ppd
break
with cups_lock:
if ppdFile:
conn.addPrinter(name=device['identifier'], ppdname=ppdFile, device=device['url'])
else:
conn.addPrinter(name=device['identifier'], device=device['url'])
conn.setPrinterInfo(device['identifier'], device['device-make-and-model'])
conn.enablePrinter(device['identifier'])
conn.acceptJobs(device['identifier'])
conn.setPrinterUsersAllowed(device['identifier'], ['all'])
conn.addPrinterOptionDefault(device['identifier'], "usb-no-reattach", "true")
conn.addPrinterOptionDefault(device['identifier'], "usb-unidir", "true")
return True
return False
@classmethod
def get_device_model(cls, device):
device_model = ""
if device.get('device-id'):
for device_id in [device_lo for device_lo in device['device-id'].split(';')]:
if any(x in device_id for x in ['MDL', 'MODEL']):
device_model = device_id.split(':')[1]
break
elif device.get('device-make-and-model'):
device_model = device['device-make-and-model']
return re.sub("[\(].*?[\)]", "", device_model).strip()
@classmethod
def get_status(cls):
status = 'connected' if any(iot_devices[d].device_type == "printer" and iot_devices[d].device_connection == 'direct' for d in iot_devices) else 'disconnected'
return {'status': status, 'messages': ''}
def action(self, data):
if data.get('action') == 'cashbox':
self.open_cashbox()
elif data.get('action') == 'print_receipt':
self.print_receipt(b64decode(data['receipt']))
else:
self.print_raw(b64decode(data['document']))
def disconnect(self):
self.update_status('disconnected', 'Printer was disconnected')
super(PrinterDriver, self).disconnect()
def update_status(self, status, message, reason=None):
"""Updates the state of the current printer.
Args:
status (str): The new value of the status
message (str): A comprehensive message describing the status
reason (str): The reason fo the current status
"""
if self.state['status'] != status or self.state['reason'] != reason:
self.state = {
'status': status,
'message': message,
'reason': reason,
}
self.send_status()
def send_status(self):
""" Sends the current status of the printer to the connected Odoo instance.
"""
self.data = {
'value': '',
'state': self.state,
}
event_manager.device_changed(self)
def print_raw(self, data):
process = subprocess.Popen(["lp", "-d", self.device_identifier], stdin=subprocess.PIPE)
process.communicate(data)
def print_receipt(self, receipt):
im = Image.open(io.BytesIO(receipt))
# Convert to greyscale then to black and white
im = im.convert("L")
im = ImageOps.invert(im)
im = im.convert("1")
print_command = getattr(self, 'format_%s' % self.receipt_protocol)(im)
self.print_raw(print_command)
def format_star(self, im):
width = int((im.width + 7) / 8)
raster_init = b'\x1b\x2a\x72\x41'
raster_page_length = b'\x1b\x2a\x72\x50\x30\x00'
raster_send = b'\x62'
raster_close = b'\x1b\x2a\x72\x42'
raster_data = b''
dots = im.tobytes()
while len(dots):
raster_data += raster_send + width.to_bytes(2, 'little') + dots[:width]
dots = dots[width:]
return raster_init + raster_page_length + raster_data + raster_close
def format_escpos(self, im):
width = int((im.width + 7) / 8)
raster_send = b'\x1d\x76\x30\x00'
max_slice_height = 255
raster_data = b''
dots = im.tobytes()
while len(dots):
im_slice = dots[:width*max_slice_height]
slice_height = int(len(im_slice) / width)
raster_data += raster_send + width.to_bytes(2, 'little') + slice_height.to_bytes(2, 'little') + im_slice
dots = dots[width*max_slice_height:]
return raster_data + RECEIPT_PRINTER_COMMANDS['escpos']['cut']
def print_status(self):
"""Prints the status ticket of the IoTBox on the current printer."""
wlan = ''
ip = ''
mac = ''
homepage = ''
pairing_code = ''
ssid = helpers.get_ssid()
wlan = '\nWireless network:\n%s\n\n' % ssid
interfaces = ni.interfaces()
ips = []
for iface_id in interfaces:
iface_obj = ni.ifaddresses(iface_id)
ifconfigs = iface_obj.get(ni.AF_INET, [])
for conf in ifconfigs:
if conf.get('addr') and conf.get('addr'):
ips.append(conf.get('addr'))
if len(ips) == 0:
ip = '\nERROR: Could not connect to LAN\n\nPlease check that the IoTBox is correc-\ntly connected with a network cable,\n that the LAN is setup with DHCP, and\nthat network addresses are available'
elif len(ips) == 1:
ip = '\nIP Address:\n%s\n' % ips[0]
else:
ip = '\nIP Addresses:\n%s\n' % '\n'.join(ips)
if len(ips) >= 1:
ips_filtered = [i for i in ips if i != '127.0.0.1']
main_ips = ips_filtered and ips_filtered[0] or '127.0.0.1'
mac = '\nMAC Address:\n%s\n' % helpers.get_mac_address()
homepage = '\nHomepage:\nhttp://%s:8069\n\n' % main_ips
code = connection_manager.pairing_code
if code:
pairing_code = '\nPairing Code:\n%s\n' % code
commands = RECEIPT_PRINTER_COMMANDS[self.receipt_protocol]
title = commands['title'] % b'IoTBox Status'
self.print_raw(commands['center'] + title + b'\n' + wlan.encode() + mac.encode() + ip.encode() + homepage.encode() + pairing_code.encode() + commands['cut'])
def open_cashbox(self):
"""Sends a signal to the current printer to open the connected cashbox."""
commands = RECEIPT_PRINTER_COMMANDS[self.receipt_protocol]
for drawer in commands['drawers']:
self.print_raw(drawer)
class PrinterController(http.Controller):
@http.route('/hw_proxy/default_printer_action', type='json', auth='none', cors='*')
def default_printer_action(self, data):
printer = next((d for d in iot_devices if iot_devices[d].device_type == 'printer' and iot_devices[d].device_connection == 'direct'), None)
if printer:
iot_devices[printer].action(data)
return True
return False
proxy_drivers['printer'] = PrinterDriver
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