flectra/addons/hw_screen/controllers/main.py
2018-01-16 17:06:46 +05:30

176 lines
7.2 KiB
Python

# -*- coding: utf-8 -*-
# Part of Odoo, Flectra. See LICENSE file for full copyright and licensing details.
from flectra import http
from flectra.tools import config
from flectra.addons.web.controllers import main as web
from flectra.addons.hw_posbox_homepage.controllers import main as homepage
import logging
import netifaces as ni
import os
from subprocess import call
import time
import threading
self_port = str(config['http_port'] or 7073)
_logger = logging.getLogger(__name__)
class Homepage(homepage.PosboxHomepage):
def get_hw_screen_message(self):
return """
<p>
If you need to display the current customer basket on another device, you can do it <a href='/point_of_sale/display'>here</a>.
</p>
"""
class HardwareScreen(web.Home):
event_data = threading.Event()
pos_client_data = {'rendered_html': False,
'ip_from': False}
display_in_use = ''
failure_count = {}
def _call_xdotools(self, keystroke):
os.environ['DISPLAY'] = ":0.0"
os.environ['XAUTHORITY'] = "/run/lightdm/pi/xauthority"
try:
call(['xdotool', 'key', keystroke])
return "xdotool succeeded in stroking " + keystroke
except:
return "xdotool threw an error, maybe it is not installed on the posbox"
@http.route('/hw_proxy/display_refresh', type='json', auth='none', cors='*')
def display_refresh(self):
return self._call_xdotools('F5')
# POS CASHIER'S ROUTES
@http.route('/hw_proxy/customer_facing_display', type='json', auth='none', cors='*')
def update_user_facing_display(self, html=None):
request_ip = http.request.httprequest.remote_addr
if request_ip == HardwareScreen.pos_client_data.get('ip_from', ''):
HardwareScreen.pos_client_data['rendered_html'] = html
HardwareScreen.event_data.set()
return {'status': 'updated'}
else:
return {'status': 'failed'}
@http.route('/hw_proxy/take_control', type='json', auth='none', cors='*')
def take_control(self, html=None):
# ALLOW A CASHIER TO TAKE CONTROL OVER THE POSBOX, IN CASE OF MULTIPLE CASHIER PER POSBOX
HardwareScreen.pos_client_data['rendered_html'] = html
HardwareScreen.pos_client_data['ip_from'] = http.request.httprequest.remote_addr
HardwareScreen.event_data.set()
return {'status': 'success',
'message': 'You now have access to the display'}
@http.route('/hw_proxy/test_ownership', type='json', auth='none', cors='*')
def test_ownership(self):
if HardwareScreen.pos_client_data.get('ip_from') == http.request.httprequest.remote_addr:
return {'status': 'OWNER'}
else:
return {'status': 'NOWNER'}
# POSBOX ROUTES (SELF)
@http.route('/point_of_sale/display', type='http', auth='none')
def render_main_display(self):
return self._get_html()
@http.route('/point_of_sale/get_serialized_order', type='json', auth='none')
def get_serialized_order(self):
request_addr = http.request.httprequest.remote_addr
result = HardwareScreen.pos_client_data
if HardwareScreen.display_in_use and request_addr != HardwareScreen.display_in_use:
if not HardwareScreen.failure_count.get(request_addr):
HardwareScreen.failure_count[request_addr] = 0
if HardwareScreen.failure_count[request_addr] > 0:
time.sleep(10)
HardwareScreen.failure_count[request_addr] += 1
return {'rendered_html': """<div class="pos-customer_facing_display"><p>Not Authorized. Another browser is in use to display for the client. Please refresh.</p></div> """,
'stop_longpolling': True,
'ip_from': request_addr}
# IMPLEMENTATION OF LONGPOLLING
# Times out 2 seconds before the JS request does
if HardwareScreen.event_data.wait(28):
HardwareScreen.event_data.clear()
HardwareScreen.failure_count[request_addr] = 0
return result
return {'rendered_html': False,
'ip_from': HardwareScreen.pos_client_data['ip_from']}
def _get_html(self):
cust_js = None
interfaces = ni.interfaces()
my_ip = '127.0.0.1'
HardwareScreen.display_in_use = http.request.httprequest.remote_addr
with open(os.path.join(os.path.dirname(__file__), "../static/src/js/worker.js")) as js:
cust_js = js.read()
with open(os.path.join(os.path.dirname(__file__), "../static/src/css/cust_css.css")) as css:
cust_css = css.read()
display_ifaces = ""
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'):
display_ifaces += "<tr><td>" + iface_id + "</td>"
display_ifaces += "<td>" + conf.get('addr') + "</td>"
display_ifaces += "<td>" + conf.get('netmask') + "</td></tr>"
# What is my external IP ?
if iface_id != 'lo':
my_ip = conf.get('addr')
my_ip_port = my_ip + ":" + self_port
html = """
<!DOCTYPE html>
<html>
<head>
<title class="origin">Flectra -- Point of Sale</title>
<script type="text/javascript" class="origin" src="http://""" + my_ip_port + """/web/static/lib/jquery/jquery.js" >
</script>
<script type="text/javascript" class="origin">
""" + cust_js + """
</script>
<link rel="stylesheet" class="origin" href="http://""" + my_ip_port + """/web/static/lib/bootstrap/css/bootstrap.css" >
</link>
<script class="origin" src="http://""" + my_ip_port + """/web/static/lib/bootstrap/js/bootstrap.min.js"></script>
<style class="origin">
""" + cust_css + """
</style>
</head>
<body class="original_body">
<div hidden class="shadow"></div>
<div class="container">
<div class="row">
<div class="col-md-4 col-md-offset-4">
<h1>Flectra Point of Sale</h1>
<h2>POSBox Client display</h2>
<h3>My IPs</h3>
<table id="table_ip" class="table table-condensed">
<tr>
<th>Interface</th>
<th>IP</th>
<th>Netmask</th>
</tr>
""" + display_ifaces + """
</table>
<p>The customer cart will be displayed here once a Point of Sale session is started.</p>
<p>Flectra version 11 or above is required.</p>
</div>
</div>
</div>
</body>
</html>
"""
return html