Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

server/platform/services/searchengine/searchengine.go

@@ -0,0 +1,52 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package searchengine
+
+import (
+	"github.com/mattermost/mattermost-server/v6/model"
+)
+
+func NewBroker(cfg *model.Config) *Broker {
+	return &Broker{
+		cfg: cfg,
+	}
+}
+
+func (seb *Broker) RegisterElasticsearchEngine(es SearchEngineInterface) {
+	seb.ElasticsearchEngine = es
+}
+
+func (seb *Broker) RegisterBleveEngine(be SearchEngineInterface) {
+	seb.BleveEngine = be
+}
+
+type Broker struct {
+	cfg                 *model.Config
+	ElasticsearchEngine SearchEngineInterface
+	BleveEngine         SearchEngineInterface
+}
+
+func (seb *Broker) UpdateConfig(cfg *model.Config) *model.AppError {
+	seb.cfg = cfg
+	if seb.ElasticsearchEngine != nil {
+		seb.ElasticsearchEngine.UpdateConfig(cfg)
+	}
+
+	if seb.BleveEngine != nil {
+		seb.BleveEngine.UpdateConfig(cfg)
+	}
+
+	return nil
+}
+
+func (seb *Broker) GetActiveEngines() []SearchEngineInterface {
+	engines := []SearchEngineInterface{}
+	if seb.ElasticsearchEngine != nil && seb.ElasticsearchEngine.IsActive() {
+		engines = append(engines, seb.ElasticsearchEngine)
+	}
+	if seb.BleveEngine != nil && seb.BleveEngine.IsActive() {
+		engines = append(engines, seb.BleveEngine)
+	}
+	return engines
+}