public $__table = 'core_curr_rate'; // table name
public $id;
public $curr;
- public $rate;
+ public $rate; // always to USD...
public $from_dt;
public $to_dt;
}
+
+
+
/**
* current rate fetching
*
* this just get's the current rates from the ecb..
*
*
- */
-
- var $rates = array();
+ */
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');
$x->whereAdd('to_date > NOW()');
if ($x->count()) {
// got some data for beyond today..
+
return;
}
}
$rates['RMB'] = $rates['CNY'] ;
- foreach($rates as $r=>$v) {
+ foreach($rates as $cur=>$euro) {
- $x = DB_DataObject::Factory('core_curr_rate');
- $x->curr = $c;
- $nl = clone($x);
- $x->orderBy('to_date DESC');
- $x->limit(1);
+
+ $rate = $this->rates['USD'] * $euro;
- $$nl->from_dt = DB_DataObject::sqlValue("NOW()");
- if ($x->find(true)) {
- if (strtotime($x->to_date) > time()) {
+
+
+
+
+
+ $ov = DB_DataObject::Factory('core_curr_rate');
+ $ov->curr = $cur;
+ $nl = clone($x);
+ $ov->orderBy('to_date 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()) {
continue;
}
- $from_date = $x->to_date;
+ $nl->from_dt = $ov->to_date;
- }
- $x->whereAdd('to_date > NOW()');
+ if ($ov->rate == $rate) {
+ // modify the old one to expire
+ $oo = clone($ov);
+ $ov->to_date = $nv->to_from_dt;
+ $ov->update($oo);
+ continue;
+ }
+ } else {
+ // no previous record...
+ $nl->from_dt = '1970-01-01 00:00:00';
+ }
+ $nl->rate = $rate;
+ // create a new row.
+ $nl->insert();
}
+ }
+ function rate($cur, $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');
+ $r->limit(1);
+ }
+
+ function convert($val, $from, $to, $when = false)
+ {
+ if ($r === false) {
+ return false;
+ }
+ if (!isset($this->rates[$from]) || !isset($this->rates[$to]) ) {
+ return false;
+ }
+ //echo '<PRE>';print_R($this->rates);
+ $base = (1.0 / $this->rates[$from]) * $val;
+
+ return $this->rates[$to] * $base;
+
}
+
+
+
}