Introduce HostSlaHistory model

Author: yhabteab

library/Icingadb/Model/HostSlaHistory.php

@@ -0,0 +1,108 @@
+<?php
+
+namespace Icinga\Module\Icingadb\Model;
+
+use ipl\Orm\Relations;
+use ipl\Orm\UnionModel;
+use ipl\Sql\Expression;
+
+class HostSlaHistory extends UnionModel
+{
+    public function getTableName()
+    {
+        return 'host';
+    }
+
+    public function getKeyName()
+    {
+        return 'host_id';
+    }
+
+    public function getColumns()
+    {
+        return [
+            'host_id',
+            'display_name',
+            'event_time',
+            'event_type',
+            'event_priority',
+            'hard_state',
+            'previous_hard_state'
+        ];
+    }
+
+    public function getUnions()
+    {
+        return [
+            [
+                Host::class,
+                [
+                    'sla_history_downtime'
+                ],
+                [
+                    'display_name'        => 'host.display_name',
+                    'event_priority'      => new Expression('1'),
+                    'event_time'          => 'sla_history_downtime.downtime_start',
+                    'event_type'          => new Expression('\'downtime_start\''),
+                    'hard_state'          => new Expression('NULL'),
+                    'host_id'             => 'id',
+                    'previous_hard_state' => new Expression('NULL'),
+                ]
+            ],
+            [
+                Host::class,
+                [
+                    'sla_history_downtime'
+                ],
+                [
+                    'display_name'        => 'host.display_name',
+                    'event_priority'      => new Expression('2'),
+                    'event_time'          => 'sla_history_downtime.downtime_end',
+                    'event_type'          => new Expression('\'downtime_end\''),
+                    'hard_state'          => new Expression('NULL'),
+                    'host_id'             => 'id',
+                    'previous_hard_state' => new Expression('NULL'),
+                ]
+            ],
+            [
+                Host::class,
+                [
+                    'sla_history_state'
+                ],
+                [
+                    'display_name'        => 'display_name',
+                    'event_priority'      => new Expression('0'),
+                    'event_time'          => 'sla_history_state.event_time',
+                    'event_type'          => new Expression('\'state_change\''),
+                    'hard_state'          => 'sla_history_state.hard_state',
+                    'host_id'             => 'id',
+                    'previous_hard_state' => 'sla_history_state.previous_hard_state',
+                ]
+            ],
+            // Fake result!!
+            [
+                Host::class,
+                [],
+                [
+                    'display_name'        => 'host.display_name',
+                    'event_priority'      => new Expression('3'),
+                    'event_time'          => new Expression('NULL'),
+                    'event_type'          => new Expression('\'end\''),
+                    'hard_state'          => new Expression('NULL'),
+                    'host_id'             => 'id',
+                    'previous_hard_state' => new Expression('NULL'),
+                ]
+            ]
+        ];
+    }
+
+    public function getDefaultSort()
+    {
+        return ['display_name', 'event_time', 'event_priority'];
+    }
+
+    public function createRelations(Relations $relations)
+    {
+        (new Host())->createRelations($relations);
+    }
+}