(dashboard widget api) add gateway data collector

src/www/widgets/api/plugins/gateway.php

@@ -25,7 +25,45 @@
     POSSIBILITY OF SUCH DAMAGE.
 */
 
+/**
+ * widget gateway data
+ */
 function gateway_api()
 {
-    return array();
+    $result = array();
+    $gateways_status = return_gateways_status(true);
+    foreach(return_gateways_array() as $gname => $gw) {
+        $gatewayItem = array("name" => $gname);
+        if (!empty($gateways_status[$gname])) {
+            $gatewayItem['address'] = lookup_gateway_ip_by_name($gname);
+            $gatewayItem['status'] = strtolower($gateways_status[$gname]['status']);
+            $gatewayItem['loss'] = $gateways_status[$gname]['loss'];
+            $gatewayItem['delay'] = $gateways_status[$gname]['delay'];
+            switch ($gatewayItem['status']) {
+                case "none":
+                    $gatewayItem['status_translated'] = gettext("Online");
+                    break;
+                case "down":
+                    $gatewayItem['status_translated'] = gettext("Offline");
+                    break;
+                case "delay":
+                    $gatewayItem['status_translated'] = gettext("Latency");
+                    break;
+                case "loss":
+                    $gatewayItem['status_translated'] = gettext("Packetloss");
+                    break;
+                default:
+                    $gatewayItem['status_translated'] = gettext("Pending");
+                    break;
+            }
+        } else {
+            $gatewayItem['address'] = "";
+            $gatewayItem['status'] = "~";
+            $gatewayItem['status_translated'] =  gettext("Unknown");
+            $gatewayItem['loss'] = "~";
+            $gatewayItem['delay'] = "unknown";
+        }
+        $result[] = $gatewayItem;
+    }
+    return $result;
 }