From: Bernard Blackham <dagobah@ucc.gu.uwa.edu.au>
Date: Fri, 25 Jun 2004 17:51:24 +0000 (+0000)
Subject: A UI on the vending machine.
X-Git-Url: https://git.ucc.asn.au/?a=commitdiff_plain;h=62cea4c2f0e367c6784f2f294a5a47f1bbc021be;p=zanchey%2Fdispense2.git

A UI on the vending machine.
---

diff --git a/sql-edition/servers/VendServer.py b/sql-edition/servers/VendServer.py
index c3f04bc..25a24b6 100755
--- a/sql-edition/servers/VendServer.py
+++ b/sql-edition/servers/VendServer.py
@@ -1,10 +1,13 @@
 #!/usr/bin/python
 
-import sys, os, string, socket, time, re
+import sys, os, string, time, re, pwd
 import pg
 from LATClient import LATClient
 from VendingMachine import VendingMachine
 
+GREETING = 'UCC SNACKS'
+PIN_LENGTH = 4
+
 class DispenseDatabase:
 	def __init__(self, vending_machine):
 		self.vending_machine = vending_machine
@@ -35,6 +38,54 @@ class DispenseDatabase:
 			self.process_requests()
 			notify = self.db.getnotify()
 
+def get_pin(uid):
+	try:
+		info = pwd.getpwuid(uid)
+	except KeyError:
+		return None
+	if info.pw_dir == None: return False
+	pinfile = os.path.join(info.pw_dir, '.pin')
+	try:
+		s = os.stat(pinfile)
+	except OSError:
+		return False
+	if s.st_mode & 077:
+		return None
+	try:
+		f = file(pinfile)
+	except IOError:
+		return None
+	pinstr = f.readline()
+	f.close()
+	if not re.search('^'+'[0-9]'*PIN_LENGTH+'$', pinstr):
+		return None
+	return int(pinstr)
+
+def has_good_pin(uid):
+	return get_pin != None
+
+def verify_user_pin(uid, pin):
+	if get_pin(uid) == pin:
+		info = pwd.getpwuid(uid)
+		return info.pw_name
+	else:
+		return None
+
+def door_open_mode(vending_machine):
+	print "Entering open door mode"
+	v.display("DOOR  OPEN")
+	while True:
+		v.wait_for_events(1)
+		while True:
+			e = v.next_event()
+			if e == None: break
+			(event, params) = e
+			if event == DOOR:
+				if params == 1: # door closed
+					v.display("BYE BYE!")
+					time.sleep(1)
+					return
+
 if __name__ == '__main__':
 	# Open vending machine via LAT
 	latclient = LATClient(service = 'VEND', password = 'dmscptd')
@@ -49,6 +100,106 @@ if __name__ == '__main__':
 
 	db = DispenseDatabase(v)
 	db.process_requests()
+	cur_user = ''
+	cur_pin = ''
+	cur_selection = ''
+
+	scrolling_message = [GREETING]
+	scrolling_wraps = False
+	need_repaint = True
+	timeout = None
+	last_tick = time.time()
+
 	while True:
+		if timeout != None and timeout > 0 and time.time() > last_tick+1:
+			timeout -= 1
+			if len(scrolling_message) > 0:
+				need_repaint = True
+		if need_repaint and len(scrolling_message) > 0:
+			v.display(scrolling_message[0])
+			if scrolling_wraps:
+				scrolling_message.append(scrolling_message[0])
+			del scrolling_message[0]
+			need_repaint = False
+
 		v.wait_for_events(1)
+		while True:
+			e = v.next_event()
+			if e == None: break
+			(event, params) = e
+			if event == DOOR:
+				if params == 0:
+					door_open_mode(v);
+					cur_user = ''
+					cur_pin = ''
+					scrolling_message = [GREETING]
+					scrolling_wraps = False
+					need_repaint = True
+			elif event == SWITCH:
+				# don't care right now.
+				pass
+			elif event == KEY:
+				key = params
+				# complicated key handling here:
+				if len(cur_user) < 5:
+					if key == 11:
+						cur_user = ''
+						scrolling_message = [GREETING]
+						scrolling_wraps = False
+						need_repaint = True
+						continue
+					cur_user += chr(key + ord('0'))
+					v.display('UID: '+cur_user)
+					if len(cur_user) == 5:
+						uid = int(cur_user)
+						if not has_good_pin(uid):
+							v.display('PIN NO GOOD')
+							time.sleep(1)
+							continue
+						v.display('PIN: ')
+						continue
+				elif len(cur_pin) < PIN_LENGTH:
+					if key == 11:
+						if cur_pin == '':
+							cur_user = ''
+							scrolling_message = [GREETING]
+							scrolling_wraps = False
+							need_repaint = True
+							continue
+						cur_pin = ''
+						v.display('PIN: ')
+						continue
+					cur_pin += chr(key + ord('0'))
+					v.display('PIN: '+'X'*len(cur_pin))
+					if len(cur_pin) == PIN_LENGTH:
+						name = verify_user_pin(int(cur_user), int(cur_pin))
+						if name:
+							v.beep(0, False)
+							cur_selection = ''
+
+							scrolling_message = [' WELCOME  ', name]
+							scrolling_message.append('OR A SNACK')
+							scrolling_wraps = True
+							need_repaint = True
+						else:
+							v.beep(255, False)
+							scrolling_message = [' BAD PIN  ', '  SORRY   ', GREETING]
+							scrolling_wraps = False
+							need_repaint = True
+
+							cur_user = ''
+							cur_pin = ''
+							continue
+				elif len(cur_selection) < 2:
+					if key == 11:
+						if cur_selection == '':
+							cur_pin = ''
+							cur_user = ''
+							v.display(GREETING)
+							continue
+						cur_selection += chr(key + ord('0'))
+						if len(cur_selection) == 2:
+							make_selection(cur_selection)
+
+
 		db.handle_events()