Device Components.

The purpose of this feature is to provide a framework for discovery modules to store
information in the database, without needing to add new tables for each feature.

This Feature provides:
- A database structure to store data.
- An API to store and retrieve data from the database.
- Integration to the LibreNMS APIv0.
- Ability to disable/ignore components.
- Default alerting rules.

- The API returns $COMPONENT[$device_id][$component_id] to allow pulling of data for multiple devices.
  The intent is to be able to create 'Applications' the consolidate data from applications covering multiple devices.
- Added some developer documentation

html/includes/forms/component.inc.php

@@ -0,0 +1,84 @@
+<?php
+
+if (is_admin() === false) {
+    $response = array(
+        'status'  => 'error',
+        'message' => 'Need to be admin',
+    );
+    echo _json_encode($response);
+    exit;
+}
+
+$status     = 'error';
+$message    = 'Error with config';
+
+// enable/disable components on devices.
+$device_id    = intval($_POST['device']);
+
+require_once "../includes/component.php";
+$OBJCOMP = new component();
+
+// Go get the component array.
+$COMPONENTS = $OBJCOMP->getComponents($device_id);
+
+// We only care about our device id.
+$COMPONENTS = $COMPONENTS[$device_id];
+
+// Track how many updates we are making.
+$UPDATE = array();
+
+foreach ($COMPONENTS as $ID => $AVP) {
+    // Is the component disabled?
+    if (isset($_POST['dis_'.$ID])) {
+        // Yes it is, was it disabled before?
+        if ($COMPONENTS[$ID]['disabled'] == 0) {
+            // No it wasn't, best we disable it then..
+            $COMPONENTS[$ID]['disabled'] = 1;
+            $UPDATE[$ID] = true;
+        }
+    }
+    else {
+        // No its not, was it disabled before?
+        if ($COMPONENTS[$ID]['disabled'] == 1) {
+            // Yes it was, best we enable it then..
+            $COMPONENTS[$ID]['disabled'] = 0;
+            $UPDATE[$ID] = true;
+        }
+    }
+
+    // Is the component ignored?
+    if (isset($_POST['ign_'.$ID])) {
+        // Yes it is, was it ignored before?
+        if ($COMPONENTS[$ID]['ignore'] == 0) {
+            // No it wasn't, best we ignore it then..
+            $COMPONENTS[$ID]['ignore'] = 1;
+            $UPDATE[$ID] = true;
+        }
+    }
+    else {
+        // No its not, was it ignored before?
+        if ($COMPONENTS[$ID]['ignore'] == 1) {
+            // Yes it was, best we un-ignore it then..
+            $COMPONENTS[$ID]['ignore'] = 0;
+            $UPDATE[$ID] = true;
+        }
+    }
+}
+
+if (count($UPDATE) > 0) {
+    // Update our edited components.
+    $STATUS = $OBJCOMP->setComponentPrefs($device_id,$COMPONENTS);
+
+    $message    = count($UPDATE).' Device records updated.';
+    $status     = 'ok';
+}
+else {
+    $message    = 'Record unchanged. No update necessary.';
+    $status     = 'ok';
+}
+
+$response = array(
+    'status'    => $status,
+    'message'   => $message,
+);
+echo _json_encode($response);