$msg
END;
}
// Return a string which is a correct link back to ourselves, with the
// operation set to $func.
function gen_link($func, $content) {
$me = $_SERVER['SCRIPT_NAME'];
return "$content";
}
// Open a form which we will process. Creates the form tag with the
// correct action, and generates a hidden field for the function.
function gen_form($func) {
$me = $_SERVER['SCRIPT_NAME'];
return "
ENDTAB;
}
// Update accounts. Used by the functions which change balances to check
// and update. Args are the amount of transaction from the web page (must
// be checked). $delta_a and $delta_b are factors. Each account is
// incremented by the delta.
function update_account($acct, $amt, $delta_a, $delta_b) {
// Check the number.
if(!numeric($amt))
return "Please Enter a Valid Number";
// Convert deltas to absolute.
$delta_a = $delta_a * $amt;
$delta_b = $delta_b * $amt;
// Attempt to read the account entry.
$dbm = opendb();
if(!$dbm) return "Database Update Failed";
$dat = pg_exec($dbm,"SELECT jelly, dust " .
"FROM accounts WHERE acctname = '$acct'");
list($a, $b) = pg_fetch_row($dat, 0);
// Check for sufficient funds.
if($a + $delta_a < 0) {
pg_close($dbm);
return "Insufficient funds in ".act_A;
}
if($b + $delta_b < 0) {
pg_close($dbm);
return "Insufficient funds in ".act_B;
}
// Update
$a += $delta_a;
$b += $delta_b;
pg_exec($dbm, "UPDATE accounts SET jelly = $a, dust = $b " .
"WHERE acctname = '$acct'");
pg_close($dbm);
return '';
}
// Generate the start menu (the menu for logged out sessions). The title
// can be sent, or defaults.
function gen_start_menu($msg = 'Welcome to Frogbreath', $error = FALSE) {
frogstart($msg, $error);
echo gen_link('login', 'Log in'), " to Frogbreath ";
echo gen_link('create', 'Create'), " a Frogbreath account ";
global $oper;
$oper = 'menu';
}
// Generate the action menu (the menu for logged in sessions). Title will
// default.
function gen_do_menu($acct, $name, $msg = FALSE, $error = FALSE) {
// Default message. Can't be the default 'cause it needs a variable.
if(!$msg) $msg = "$name at Frogbreath";
frogstart($msg, $error);
// Generate the links.
echo gen_link('buy', 'Buy stuff'),
" you can't see from Frogbreath ";
echo gen_link('add', 'Give'), " fake money to Frogbreath ";
echo gen_link('xfer', 'Transfer'), " fake money between accounts. ";
echo gen_link('query', 'Query'), " fake balances. ";
echo gen_link('logout', 'Log out'), " from Frogbreath ";
global $oper;
$oper = 'menu';
}
// Log out the user. Changes the session state.
function do_logout($name) {
// Change state and generate the login menu.
$_SESSION['state'] = 'out';
gen_start_menu("$name has left Frogbreath");
}
// Function for serious errors that we can't figure out.
function gen_err($msg) {
// Just in case.
$_SESSION['state'] = 'out';
whap("Internal Error: $msg",
"An internal error has occurred: $msg." .
"This may indicate a problem with our server or your " .
"network connection. You may want to try again later. " .
"We regret any inconvenience this may cause.
" .
"Thank you for visiting Frogbreath.");
}
// Output a table of the subaccount balances for the currently logged-on
// account. Displays the header which defaults. If there is problem,
// returns an error message. Otherwise, returns ''.
function display_bal($acct, $msg = '', $error = FALSE) {
$Act_A = Act_A;
$Act_B = Act_B;
// Attempt to read the balances.
$dbm = opendb();
if(!$dbm)
return 'Database open failed.';
$dat = pg_exec($dbm,"SELECT jelly, dust, humanname " .
"FROM accounts WHERE acctname = '$acct'");
list($n, $m, $name) = pg_fetch_row($dat, 0);
pg_close($dbm);
// Display.
if(!$msg) $msg = "Balances for $name";
frogstart($msg, $error);
echo <<
$Act_A:
$n
$Act_B:
$m
DONE;
return '';
}
// Generate the balance query page.
function gen_query($acct, $name) {
$str = display_bal($acct);
if($str != '')
gen_do_menu($acct, $name, $str, TRUE);
}
// Produce the add additional funds menu.
function gen_add($acct, $name, $head, $error = FALSE) {
// Generate the current balance table
if(($m = display_bal($acct,$head)) != '') {
gen_do_menu($acct, $name, $m, TRUE);
return;
}
echo "
";
// Generate the transfer information form.
amt_acct_form('doadd', 'Funds to Add', "Add to ".act_A,
"Add to ".act_B, 'ADD');
}
// Process additional funds response.
function do_add($acct, $name) {
$amt = $_REQUEST['amt'];
$which = $_REQUEST['which'];
// Compute the delta factors for update_account based on the
// account selection from the form.
$da = $db = 0;
if($which == 'a') $da = 1;
else $db = 1;
// Attempt to update the account, then go to the index, or back to
// account add form in case of error.
if(($msg = update_account($acct, $amt, $da, $db)) != '')
gen_add($acct, $name, $msg);
else
gen_do_menu($acct, $name,
"Added $amt to " . ${"act_$which"} . " for $name");
}
// Generate transfer menu.
function gen_xfer($acct, $name, $head, $error = FALSE) {
// Display current balances.
if(($m = display_bal($acct, $head, $error)) != '') {
gen_do_menu($acct, $name, $m);
return;
}
echo "
";
// Generate transfer form.
amt_acct_form('doxfer', 'Funds to Transfer',
"Transfer from " . act_A . " to " . act_B,
"Transfer from " . act_B . " to " . act_A,
'TRANSFER');
}
// Process funds transfer.
function do_xfer($acct, $name) {
$amt = $_REQUEST['amt'];
// Based on radio button results, choose deltas for update_account,
// and a success message, in case we have some.
if($_REQUEST['which'] == 'a') {
$da = -1;
$db = 1;
$succ = "Transferred $amt from " . act_A . " to " . act_B .
" for $name";
} else {
$da = 1;
$db = -1;
$succ = "Transferred $amt from " . act_B . " to " . act_A .
" for $name";
}
// Update the account, menu or back to form in case of error.
if(($msg = update_account($acct, $amt, $da, $db)) != '')
gen_xfer($acct, $name, $msg, TRUE);
else
gen_do_menu($acct, $name, $succ);
}
// Generate the purchase menu.
function gen_buy($acct, $name, $head, $error = FALSE) {
// Display current balances.
if(($m = display_bal($acct, $head, $error)) != '') {
gen_do_menu($acct, $name, $m);
return;
}
echo "
$msg
END;
}
// Return a string which is a correct link back to ourselves, with the
// operation set to $func.
function gen_link($func, $content) {
$me = $_SERVER['SCRIPT_NAME'];
return "$content";
}
// Open a form which we will process. Creates the form tag with the
// correct action, and generates a hidden field for the function.
function gen_form($func) {
$me = $_SERVER['SCRIPT_NAME'];
return "
ENDTAB;
}
// Update accounts. Used by the functions which change balances to check
// and update. Args are the amount of transaction from the web page (must
// be checked). $delta_a and $delta_b are factors. Each account is
// incremented by the delta.
function update_account($acct, $amt, $delta_a, $delta_b) {
// Check the number.
if(!numeric($amt))
return "Please Enter a Valid Number";
// Convert deltas to absolute.
$delta_a = $delta_a * $amt;
$delta_b = $delta_b * $amt;
// Attempt to read the account entry.
$dbm = opendb();
if(!$dbm) return "Database Update Failed";
$dat = pg_exec($dbm,"SELECT jelly, dust " .
"FROM accounts WHERE acctname = '$acct'");
list($a, $b) = pg_fetch_row($dat, 0);
// Check for sufficient funds.
if($a + $delta_a < 0) {
pg_close($dbm);
return "Insufficient funds in ".act_A;
}
if($b + $delta_b < 0) {
pg_close($dbm);
return "Insufficient funds in ".act_B;
}
// Update
$a += $delta_a;
$b += $delta_b;
pg_exec($dbm, "UPDATE accounts SET jelly = $a, dust = $b " .
"WHERE acctname = '$acct'");
pg_close($dbm);
return '';
}
// Generate the start menu (the menu for logged out sessions). The title
// can be sent, or defaults.
function gen_start_menu($msg = 'Welcome to Frogbreath', $error = FALSE) {
frogstart($msg, $error);
echo gen_link('login', 'Log in'), " to Frogbreath