Added invoice reminder details and other misc fixes

modules/invoice/classes/Model/Invoice.php

@@ -121,6 +121,27 @@ class Model_Invoice extends ORM_OSB implements Cartable {
 		return $result;
 	}
 
+	/**
+	 * Returns the array of Email Template Objects
+	 */
+	public function reminders($key=NULL,$format=FALSE) {
+		$prefix = 'task_invoice_';
+
+		if (is_null($key)) {
+			$result = array();
+
+			foreach ($this->reminders as $k=>$v)
+				array_push($result,ORM::factory('Email_Template',array('name'=>$prefix.$k)));
+
+			return $result;
+
+		} else {
+			$key = preg_replace("/^$prefix/",'',$key);
+
+			return isset($this->reminders[$key]) ? ($format ? Config::date($this->reminders[$key]) : $this->reminders[$key]) : NULL;
+		}
+	}
+
 	/**
 	 * Return the service items on an invoice relating to an invoice_item
 	 * IE: item_type == 0