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/channels/app/platform/searchengine.go

@@ -0,0 +1,87 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package platform
+
+import (
+	"github.com/mattermost/mattermost-server/v6/model"
+	"github.com/mattermost/mattermost-server/v6/server/platform/shared/mlog"
+)
+
+func (ps *PlatformService) StartSearchEngine() (string, string) {
+	if ps.SearchEngine.ElasticsearchEngine != nil && ps.SearchEngine.ElasticsearchEngine.IsActive() {
+		ps.Go(func() {
+			if err := ps.SearchEngine.ElasticsearchEngine.Start(); err != nil {
+				ps.Log().Error(err.Error())
+			}
+		})
+	}
+
+	configListenerId := ps.AddConfigListener(func(oldConfig *model.Config, newConfig *model.Config) {
+		if ps.SearchEngine == nil {
+			return
+		}
+		ps.SearchEngine.UpdateConfig(newConfig)
+
+		if ps.SearchEngine.ElasticsearchEngine != nil && !*oldConfig.ElasticsearchSettings.EnableIndexing && *newConfig.ElasticsearchSettings.EnableIndexing {
+			ps.Go(func() {
+				if err := ps.SearchEngine.ElasticsearchEngine.Start(); err != nil {
+					mlog.Error(err.Error())
+				}
+			})
+		} else if ps.SearchEngine.ElasticsearchEngine != nil && *oldConfig.ElasticsearchSettings.EnableIndexing && !*newConfig.ElasticsearchSettings.EnableIndexing {
+			ps.Go(func() {
+				if err := ps.SearchEngine.ElasticsearchEngine.Stop(); err != nil {
+					mlog.Error(err.Error())
+				}
+			})
+		} else if ps.SearchEngine.ElasticsearchEngine != nil && *oldConfig.ElasticsearchSettings.Password != *newConfig.ElasticsearchSettings.Password || *oldConfig.ElasticsearchSettings.Username != *newConfig.ElasticsearchSettings.Username || *oldConfig.ElasticsearchSettings.ConnectionURL != *newConfig.ElasticsearchSettings.ConnectionURL || *oldConfig.ElasticsearchSettings.Sniff != *newConfig.ElasticsearchSettings.Sniff {
+			ps.Go(func() {
+				if *oldConfig.ElasticsearchSettings.EnableIndexing {
+					if err := ps.SearchEngine.ElasticsearchEngine.Stop(); err != nil {
+						mlog.Error(err.Error())
+					}
+					if err := ps.SearchEngine.ElasticsearchEngine.Start(); err != nil {
+						mlog.Error(err.Error())
+					}
+				}
+			})
+		}
+	})
+
+	licenseListenerId := ps.AddLicenseListener(func(oldLicense, newLicense *model.License) {
+		if ps.SearchEngine == nil {
+			return
+		}
+		if oldLicense == nil && newLicense != nil {
+			if ps.SearchEngine.ElasticsearchEngine != nil && ps.SearchEngine.ElasticsearchEngine.IsActive() {
+				ps.Go(func() {
+					if err := ps.SearchEngine.ElasticsearchEngine.Start(); err != nil {
+						mlog.Error(err.Error())
+					}
+				})
+			}
+		} else if oldLicense != nil && newLicense == nil {
+			if ps.SearchEngine.ElasticsearchEngine != nil {
+				ps.Go(func() {
+					if err := ps.SearchEngine.ElasticsearchEngine.Stop(); err != nil {
+						mlog.Error(err.Error())
+					}
+				})
+			}
+		}
+	})
+
+	return configListenerId, licenseListenerId
+}
+
+func (ps *PlatformService) StopSearchEngine() {
+	ps.RemoveConfigListener(ps.searchConfigListenerId)
+	ps.RemoveLicenseListener(ps.searchLicenseListenerId)
+	if ps.SearchEngine != nil && ps.SearchEngine.ElasticsearchEngine != nil && ps.SearchEngine.ElasticsearchEngine.IsActive() {
+		ps.SearchEngine.ElasticsearchEngine.Stop()
+	}
+	if ps.SearchEngine != nil && ps.SearchEngine.BleveEngine != nil && ps.SearchEngine.BleveEngine.IsActive() {
+		ps.SearchEngine.BleveEngine.Stop()
+	}
+}