Rebuild channel index (#26080)

* WIP

* Added rebuild channels index functionality

* Added rough logic to send message to all sysadmins

* WIP

* WIP

* WIP

* Cleanup

* i18n fix

* reading through all pages of system admins

* Fixed webapp style

* i18n fix

* Added help text

* i18n fix

* i18n update

* Updated system console button action

* Updated snapshots

* some cleanup

* Updated snapshot

* Update server/channels/app/server.go

Co-authored-by: Daniel Espino García <larkox@gmail.com>

* fixed typo

* Refactoring to improve readibility

* moved index check to API later during config update

* Added some docs

* Updated get system bot

---------

Co-authored-by: Daniel Espino García <larkox@gmail.com>

server/platform/services/searchengine/bleveengine/bleve.go

@@ -292,6 +292,10 @@ func (b *BleveEngine) PurgeIndexes(rctx request.CTX) *model.AppError {
 	return b.openIndexes()
 }
 
+func (b *BleveEngine) PurgeIndexList(rctx request.CTX, indexes []string) *model.AppError {
+	return model.NewAppError("Bleve.PurgeIndex", "bleveengine.purge_list.not_implemented", nil, "not implemented", http.StatusNotFound)
+}
+
 func (b *BleveEngine) DataRetentionDeleteIndexes(rctx request.CTX, cutoff time.Time) *model.AppError {
 	return nil
 }
@@ -331,3 +335,7 @@ func (b *BleveEngine) UpdateConfig(cfg *model.Config) {
 	}
 	b.cfg = cfg
 }
+
+func (b *BleveEngine) IsChannelsIndexVerified() bool {
+	return true
+}

server/platform/services/searchengine/interface.go

@@ -47,6 +47,8 @@ type SearchEngineInterface interface {
 	DeleteFilesBatch(rctx request.CTX, endTime, limit int64) *model.AppError
 	TestConfig(rctx request.CTX, cfg *model.Config) *model.AppError
 	PurgeIndexes(rctx request.CTX) *model.AppError
+	PurgeIndexList(rctx request.CTX, indexes []string) *model.AppError
 	RefreshIndexes(rctx request.CTX) *model.AppError
 	DataRetentionDeleteIndexes(rctx request.CTX, cutoff time.Time) *model.AppError
+	IsChannelsIndexVerified() bool
 }

server/platform/services/searchengine/mocks/SearchEngineInterface.go

@@ -327,6 +327,20 @@ func (_m *SearchEngineInterface) IsAutocompletionEnabled() bool {
 	return r0
 }
 
+// IsChannelsIndexVerified provides a mock function with given fields:
+func (_m *SearchEngineInterface) IsChannelsIndexVerified() bool {
+	ret := _m.Called()
+
+	var r0 bool
+	if rf, ok := ret.Get(0).(func() bool); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Get(0).(bool)
+	}
+
+	return r0
+}
+
 // IsEnabled provides a mock function with given fields:
 func (_m *SearchEngineInterface) IsEnabled() bool {
 	ret := _m.Called()
@@ -383,6 +397,22 @@ func (_m *SearchEngineInterface) IsSearchEnabled() bool {
 	return r0
 }
 
+// PurgeIndexList provides a mock function with given fields: rctx, indexes
+func (_m *SearchEngineInterface) PurgeIndexList(rctx request.CTX, indexes []string) *model.AppError {
+	ret := _m.Called(rctx, indexes)
+
+	var r0 *model.AppError
+	if rf, ok := ret.Get(0).(func(request.CTX, []string) *model.AppError); ok {
+		r0 = rf(rctx, indexes)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*model.AppError)
+		}
+	}
+
+	return r0
+}
+
 // PurgeIndexes provides a mock function with given fields: rctx
 func (_m *SearchEngineInterface) PurgeIndexes(rctx request.CTX) *model.AppError {
 	ret := _m.Called(rctx)