1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
/* Copyright 2012, Sebastian Reichel <sre@ring0.de>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
public Device dev;
public Database db;
public AudioPlayer audio;
public CSVMemberFile csvimport;
public MainLoop loop;
public static int main(string[] args) {
Gst.init(ref args);
if(args.length < 2) {
stderr.printf("%s <device>\n", args[0]);
return 1;
}
/* handle unix signals */
Unix.signal_add(Posix.SIGTERM, handle_signals);
Unix.signal_add(Posix.SIGINT, handle_signals);
dev = new Device(args[1], 9600, 8, 1);
db = new Database("shop.db");
audio = new AudioPlayer();
loop = new MainLoop();
dev.received_barcode.connect((data) => {
if(interpret(data))
dev.blink(10);
});
write_to_log("KtT Shop System has been started");
audio.play("system/startup.ogg");
/* attach webserver to mainloop */
new WebServer();
/* run mainloop */
loop.run();
write_to_log("Stopping Shop System");
audio.play("system/shutdown.ogg");
/* we need to run the mainloop to play audio */
audio.end_of_stream.connect(() => { loop.quit(); });
loop.run();
/* explicitly call destructors */
dev = null;
db = null;
audio = null;
return 0;
}
public void write_to_log(string format, ...) {
var arguments = va_list();
var message = format.vprintf(arguments);
stdout.printf(message + "\n");
}
public static bool interpret(string data) {
if(data.has_prefix("USER ")) {
string str_id = data.substring(5);
int32 id = int.parse(str_id);
/* check if data has valid format */
if(data != "USER %d".printf(id)) {
write_to_log("ungültige Benutzernummer: %s", data);
return false;
}
if(db.is_logged_in()) {
write_to_log("Last User forgot to logout!");
db.logout();
}
write_to_log("Login: %d", id);
return db.login(id);
} else if(data == "GUEST") {
if(db.is_logged_in()) {
write_to_log("Last User forgot to logout!");
db.logout();
}
write_to_log("Login: Guest");
return db.login(0);
} else if(data == "UNDO") {
if(!db.is_logged_in()) {
write_to_log("Can't undo if not logged in!");
return false;
} else {
write_to_log("Undo last purchase!");
return db.undo();
}
} else if(data == "LOGOUT") {
if(db.is_logged_in()) {
write_to_log("Logout!");
return db.logout();
}
return false;
} else {
uint64 id = uint64.parse(data);
/* check if data has valid format */
if(data != "%llu".printf(id)) {
write_to_log("ungültiges Produkt: %s", data);
return false;
}
if(db.buy(id)) {
write_to_log("gekaufter Artikel: %s (%d,%02d €)", db.get_product_name(id), db.get_product_price(id)/100, db.get_product_price(id) % 100);
return true;
} else {
write_to_log("Kauf fehlgeschlagen!");
return false;
}
}
}
bool handle_signals() {
loop.quit();
return false;
}
|
