Additional parameters for list_alerts and list_devices API calls (#9040)

- Add filtering by severity in list_alerts.
- Added ability to filter only active devices (not ignored and not disabled) in list_devices.

DO NOT DELETE THIS TEXT

#### Please note

> Please read this information carefully. You can run `./scripts/pre-commit.php` to check your code before submitting.

- [x] Have you followed our [code guidelines?](http://docs.librenms.org/Developing/Code-Guidelines/)

#### Testers

If you would like to test this pull request then please run: `./scripts/github-apply <pr_id>`, i.e `./scripts/github-apply 5926`

html/includes/api_functions.inc.php

@@ -318,6 +318,8 @@ function list_devices()
 
     if ($type == 'all' || empty($type)) {
         $sql = '1';
+    } elseif ($type == 'active') {
+        $sql = "`d`.`ignore`='0' AND `d`.`disabled`='0'";
     } elseif ($type == 'location') {
         $sql = "`d`.`location` LIKE '%".$query."%'";
     } elseif ($type == 'ignored') {
@@ -1043,6 +1045,17 @@ function list_alerts()
         $sql .= 'AND `A`.id=?';
     }
 
+    $severity = $_GET['severity'];
+    if (isset($severity)) {
+        if (in_array($severity, ['ok', 'warning', 'critical'])) {
+            $param[] = $severity;
+            $sql .= ' AND `R`.severity=?';
+        }
+    }
+    
+    $order = $_GET['order'] ?: "timestamp desc";
+    $sql .= ' ORDER BY A.'.$order;
+
     $alerts = dbFetchRows($sql, $param);
     api_success($alerts, 'alerts');
 }