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/* 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 static int main(string[] args) {
if(args.length < 2) {
stderr.printf("%s <device>\n", args[0]);
return 1;
}
dev = new Device(args[1], 9600, 8, 1);
db = new Database("shop.db");
dev.received_barcode.connect((data) => {
if(interpret(data))
dev.blink(10);
});
write_to_log("KtT Shop System has been started");
/* attach webserver to mainloop */
new WebServer();
/* run mainloop */
new MainLoop().run();
/* call destructors */
dev = null;
db = 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;
}
}
}
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