Implement the system status api endpoint. Closes #1936

app/Integrations/Contracts/System.php

@@ -0,0 +1,27 @@
+<?php
+
+/*
+ * This file is part of Cachet.
+ *
+ * (c) Alt Three Services Limited
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace CachetHQ\Cachet\Integrations\Contracts;
+
+/**
+ * This is the system interface.
+ *
+ * @author James Brooks <james@alt-three.com>
+ */
+interface System
+{
+    /**
+     * Get the entire system status.
+     *
+     * @return array
+     */
+    public function getStatus();
+}

app/Integrations/Core/System.php

@@ -0,0 +1,70 @@
+<?php
+
+/*
+ * This file is part of Cachet.
+ *
+ * (c) Alt Three Services Limited
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace CachetHQ\Cachet\Integrations\Core;
+
+use CachetHQ\Cachet\Integrations\Contracts\System as SystemContract;
+use CachetHQ\Cachet\Models\Component;
+use CachetHQ\Cachet\Models\Incident;
+
+/**
+ * This is the core system class.
+ *
+ * @author James Brooks <james@alt-three.com>
+ */
+class System implements SystemContract
+{
+    /**
+     * Get the entire system status.
+     *
+     * @return array
+     */
+    public function getStatus()
+    {
+        $enabledScope = Component::enabled();
+        $totalComponents = Component::enabled()->count();
+        $majorOutages = Component::enabled()->status(4)->count();
+        $isMajorOutage = $totalComponents ? ($majorOutages / $totalComponents) >= 0.5 : false;
+
+        // Default data
+        $status = [
+            'system_status'  => 'info',
+            'system_message' => trans_choice('cachet.service.bad', $totalComponents),
+            'favicon'        => 'favicon-high-alert',
+        ];
+
+        if ($isMajorOutage) {
+            $status = [
+                'system_status'  => 'danger',
+                'system_message' => trans_choice('cachet.service.major', $totalComponents),
+                'favicon'        => 'favicon-high-alert',
+            ];
+        } elseif (Component::enabled()->notStatus(1)->count() === 0) {
+            // If all our components are ok, do we have any non-fixed incidents?
+            $incidents = Incident::notScheduled()->orderBy('created_at', 'desc')->get()->filter(function ($incident) {
+                return $incident->status > 0;
+            });
+            $incidentCount = $incidents->count();
+
+            if ($incidentCount === 0 || ($incidentCount >= 1 && (int) $incidents->first()->status === 4)) {
+                $status = [
+                    'system_status'  => 'success',
+                    'system_message' => trans_choice('cachet.service.good', $totalComponents),
+                    'favicon'        => 'favicon',
+                ];
+            }
+        } elseif (Component::enabled()->whereIn('status', [2, 3])->count() > 0) {
+            $status['favicon'] = 'favicon-medium-alert';
+        }
+
+        return $status;
+    }
+}