public $__table = 'core_curr_rate'; // table name
public $id;
public $curr;
- public $rate;
+ public $rate; // always to USD...
public $from_dt;
public $to_dt;
function loadRates()
{
+ static $checked = false;
+ if ($checked ) {
+ return true;
+ }
+ $checked = true;
+
// how often do we need to know this..?
// let's assume we do it once a week..
$x = DB_DataObject::Factory('core_curr_rate');
- $x->whereAdd('to_date > NOW()');
+ $x->whereAdd('to_dt > NOW()');
if ($x->count()) {
// got some data for beyond today..
+
return;
}
}
$rates['RMB'] = $rates['CNY'] ;
- foreach($rates as $cur=>$rate) {
+ foreach($rates as $cur=>$euro) {
+
+
+ $rate = $euro / $this->rates['USD'];
+
+
$ov = DB_DataObject::Factory('core_curr_rate');
$ov->curr = $cur;
$nl = clone($x);
- $ov->orderBy('to_date DESC');
+ $ov->orderBy('to_dt DESC');
$ov->limit(1);
$nl->from_dt = DB_DataObject::sqlValue("NOW()");
$nl->to_dt = DB_DataObject::sqlValue("NOW() + INTERVAL 7 DAY");
if ($ov->find(true)) {
- if (strtotime($ov->to_date) > time()) {
+ if (strtotime($ov->to_dt) > time()) {
continue;
}
- $nl->from_dt = $ov->to_date;
+ $nl->from_dt = $ov->to_dt;
if ($ov->rate == $rate) {
// modify the old one to expire
$oo = clone($ov);
- $ov->to_date = $nv->to_from_dt;
+ $ov->to_dt = $nv->from_dt;
$ov->update($oo);
continue;
}
}
+ function rate($cur, $when)
+ {
+ $when === false ? date('Y-m-d H:i:s') : $when;
+ $this->loadRates(); // check if we have an rates.
+
+ $r = DB_DataObject::factory('core_curr_rate');
+ $r->curr = $cur;
+ $r->whereAdd("from_dt < '" . date('Y-m-d H:i:s', strtotime($when)) . "'");
+
+ $r->orderBy('to_dt ASC');
+ $r->limit(1);
+ if ($r->find(true)) {
+ return $r->rate;
+ }
+ return false;
+ }
+ function convert($val, $from, $to, $when = false)
+ {
+
+
+ $fr = $this->rate($from, $when);
+ $tr = $this->rate($to, $when);
+
+ // crappy error handling..
+ if ($fr === false) {
+ $fr = 1;
+ }
+ if ($tr === false) {
+ $tr = 1;
+ }
+
+ return ((1.0 / $fr) * $val) * $tr;
+
+
+
+ }