function ask_y_or_n($question)
{
echo "{$question} (y or n): ";
$input_str = my_fgets();
echo "\n";
if ($input_str === "y") {
return true;
} else {
if ($input_str === "n") {
return false;
} else {
echo "Your input is invalid.\n";
exit(1);
}
}
}
function select_snt()
{
$snts = get_schedule();
foreach ($snts as $key => $snt) {
echo "{$key}) " . date('Y-m-d H:i', time_of_when($snt["when"])) . "\n";
}
echo "\n";
echo "Select a S&T (x to exit): ";
$input_str = my_fgets();
echo "\n";
if ($input_str === "x") {
echo "Exit\n";
exit(0);
} else {
if (my_key_exists($input_str, $snts)) {
$snt = $snts[(int) $input_str];
echo "The S&T on " . date('Y-m-d H:i', time_of_when($snt["when"])) . " is selected.\n\n";
return $snt;
} else {
echo "Your input is invalid.\n";
exit(1);
}
}
}
