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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);
});
new MainLoop(null, false).run();
return 0;
}
public static bool interpret(string data) {
int64 timestamp = (new DateTime.now_utc()).to_unix();
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)) {
stdout.printf("[%lld] ungültige Benutzernummer: %s\n", timestamp, data);
return false;
}
if(db.is_logged_in()) {
stdout.printf("[%lld] Last User forgot to logout!\n", timestamp);
db.logout();
}
stdout.printf("[%lld] Login: %d\n", timestamp, id);
return db.login(id);
} else if(data == "GUEST") {
if(db.is_logged_in()) {
stdout.printf("[%lld] Last User forgot to logout!\n", timestamp);
db.logout();
}
stdout.printf("[%lld] Login: Guest\n", timestamp);
return db.login(0);
} else if(data == "UNDO") {
if(!db.is_logged_in()) {
stdout.printf("[%lld] Can't undo if not logged in!\n", timestamp);
return false;
} else {
stdout.printf("[%lld] Undo last purchase!\n", timestamp);
return db.undo();
}
} else if(data == "LOGOUT") {
if(db.is_logged_in()) {
stdout.printf("[%lld] Logout!\n", timestamp);
return db.logout();
}
return false;
} else if(data == "STOCK") {
if(!db.is_logged_in()) {
stdout.printf("[%lld] You must be logged in to go into the stock mode\n", timestamp);
return false;
} else {
stdout.printf("[%lld] Going into stock mode!\n", timestamp);
return db.go_into_stock_mode();
}
} else if(db.is_in_stock_mode()) {
if(!data.has_prefix("AMOUNT")) {
uint64 id = uint64.parse(data);
/* check if data has valid format */
if(data != "%llu".printf(id)) {
stdout.printf("[%lld] ungültiges Produkt: %s\n", timestamp, data);
return false;
}
stdout.printf("[%lld] wähle Produkt: %s\n", timestamp, db.get_product_name(id));
return db.choose_stock_product(id);
} else {
uint64 amount = uint64.parse(data.substring(7));
/* check if data has valid format */
if(data != "AMOUNT %llu".printf(amount)) {
stdout.printf("[%lld] ungültiges Produkt: %s\n", timestamp, data);
return false;
}
stdout.printf("[%lld] zum Bestand hinzufügen: %llu\n", timestamp, amount);
return db.add_stock_product(amount);
}
} else {
uint64 id = uint64.parse(data);
/* check if data has valid format */
if(data != "%llu".printf(id)) {
stdout.printf("[%lld] ungültiges Produkt: %s\n", timestamp, data);
return false;
}
if(db.buy(id)) {
stdout.printf("[%lld] gekaufter Artikel: %s\n", timestamp, db.get_product_name(id));
return true;
} else {
stdout.printf("[%lld] Kauf fehlgeschlagen!\n", timestamp);
return false;
}
}
}
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