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| #!/usr/bin/env python2.7 | ||
| # -*- coding: utf-8 -*- | ||
| # | ||
| # FabLabKasse, a Point-of-Sale Software for FabLabs and other public and trust-based workshops. | ||
| # Copyright (C) 2015 Julian Hammer <julian.hammer@fablab.fau.de> | ||
| # Maximilian Gaukler <max@fablab.fau.de> | ||
| # Timo Voigt <timo@fablab.fau.de> | ||
| # | ||
| # This program is free software: you can redistribute it and/or modify it under the terms of the GNU | ||
| # General Public License as published by the Free Software Foundation, either version 3 of the | ||
| # License, or (at your option) any later version. | ||
| # | ||
| # This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without | ||
| # even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| # General Public License for more details. | ||
| # | ||
| # You should have received a copy of the GNU General Public License along with this program. If not, | ||
| # see <http://www.gnu.org/licenses/>. | ||
|
|
||
| "GUI + logic for loading the cart from a mobile application." | ||
|
|
||
| from PyQt4 import Qt, QtGui | ||
| from FabLabKasse.UI.LoadFromMobileAppDialogCode import LoadFromMobileAppDialog | ||
| from FabLabKasse.shopping.cart_from_app.cart_model import MobileAppCartModel | ||
| import logging | ||
|
|
||
| # check that current cart is empty | ||
|
|
||
|
|
||
| class MobileAppCartGUI(object): | ||
|
|
||
| "GUI + logic for loading the cart from a mobile application. It shows a QR Code as one-time-token for authentication." | ||
|
|
||
| def __init__(self, parent, appstore_url): | ||
| """ | ||
| parent: GUI main object. used as Qt GUI parent and for accessing shoppingBackend | ||
| appstore_url: URL for QRcode that leads to the app installation | ||
| """ | ||
| self.random_code = "" | ||
| self.diag = LoadFromMobileAppDialog(parent, appstore_url) | ||
| self.parent = parent | ||
|
|
||
| self.cart = MobileAppCartModel() | ||
| self.cart.cart_id_changed.connect(self.diag.set_random_code) | ||
|
|
||
| self.poll_timer = Qt.QTimer(self.parent) | ||
| self.poll_timer.setSingleShot(True) | ||
| self.poll_timer.setInterval(1000) | ||
| self.poll_timer.timeout.connect(self.poll) | ||
|
|
||
| def execute(self): | ||
| """show dialog with QRcodes, process order and payment, cleanup afterwards. | ||
| This method blocks until everything is done. | ||
| """ | ||
| if self.parent.shoppingBackend.get_current_order() != None: | ||
| if self.parent.shoppingBackend.get_current_total() != 0: | ||
| QtGui.QMessageBox.warning(self.parent, "Fehler", | ||
| u"Im Warenkorb am Automat liegen Produkte.\n" + | ||
| u"Bitte zahle zuerst diese Produkte oder lösche sie aus dem Warenkorb.\n") | ||
| return | ||
| self.parent.shoppingBackend.delete_current_order() | ||
| self.parent.shoppingBackend.set_current_order(None) | ||
|
|
||
| self.poll_timer.start() | ||
| self.diag.finished.connect(lambda x: self.dialog_finished) | ||
| self.diag.show() | ||
|
|
||
| def pay_cart(self, cart): | ||
| """ import given cart (from server's response), let the user pay it | ||
| @param cart: response from server | ||
| @rtype: bool | ||
| @return: True if successfully paid, False otherwise. | ||
| """ | ||
| # cart received | ||
| new_order = self.parent.shoppingBackend.create_order() | ||
| self.parent.shoppingBackend.set_current_order(new_order) | ||
|
|
||
| for (product, quantity) in cart: | ||
| self.parent.shoppingBackend.add_order_line(prod_id=product, qty=quantity, comment="") | ||
|
|
||
| # check total sum | ||
| # TODO this is ugly and doesn't show everything when there are too many articles | ||
| # make a nice GUI out of it | ||
| infotext = u"Stimmt der Warenkorb? \n" | ||
| order_lines = self.parent.shoppingBackend.get_order_lines() | ||
| for line in order_lines[0:10]: | ||
| infotext += unicode(line) + "\n" | ||
| if len(order_lines) > 10: | ||
| infotext += "... und {} weitere Posten ...\n".format(len(order_lines - 10)) | ||
| infotext += u"Gesamt: {}\n".format(self.parent.shoppingBackend.format_money(self.parent.shoppingBackend.get_current_total())) | ||
| okay = QtGui.QMessageBox.information(self.parent, "Warenkorb", infotext, QtGui.QMessageBox.Cancel | QtGui.QMessageBox.Yes) | ||
| okay = okay == QtGui.QMessageBox.Yes | ||
| if okay: | ||
| # try payup | ||
| successful = (self.parent.payup() == True) | ||
| else: | ||
| successful = False | ||
| print "feedback successful = {}".format(successful) | ||
| self.cart.send_status_feedback(successful) | ||
| if not successful: | ||
| self.parent.shoppingBackend.delete_current_order() | ||
| self.parent.shoppingBackend.set_current_order(None) | ||
| QtGui.QMessageBox.information(self.parent, "Info", u"Die Zahlung wurde abgebrochen.") | ||
| return successful | ||
|
|
||
| def poll(self): | ||
| "query the server if a cart was stored" | ||
| if not self.diag.isVisible(): | ||
| # this should not happen, maybe a race-condition | ||
| return | ||
| logging.debug(u"polling for cart {}".format(self.cart.cart_id)) | ||
| response = self.cart.load() | ||
| if not response: | ||
| self.poll_timer.start() | ||
| return | ||
| logging.debug("received cart: {}".format(response)) | ||
| self.diag.setEnabled(False) | ||
| self.pay_cart(response) | ||
| self.diag.reject() | ||
| self.parent.updateOrder() | ||
|
|
||
| def dialog_finished(self): | ||
| "user somehow exited the dialog. clean up everything." | ||
| self.poll_timer.stop() | ||
| self.diag.deleteLater() | ||
| self.poll_timer.deleteLater() | ||
| self.cart.deleteLater() |
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