Adding the new search engine abstraction (#13304)

* WIP

* Adding bleve to go modules

* WIP

* Adding missing files from searchengine implementation

* WIP

* WIP

* WIP

* WIP

* WIP

* WIP

* User and channel indexing and searches implemented

* Make bleve tests run with in-memory indexes

* Implement post index and deletion tests

* Initial commits for the search layer

* Removing unnecesary indexing

* WIP

* WIP

* More fixes for tests

* Adding the search layer

* Finishing the migration of searchers to the layer

* Removing unnecesary code

* Allowing multiple engines active at the same time

* WIP

* Add simple post search

* Print information when using bleve

* Adding some debugging to understand better how the searches are working

* Making more dynamic config of search engines

* Add post search basics

* Adding the Purge API endpoint

* Fixing bleve config updates

* Adding missed file

* Regenerating search engine mocks

* Adding missed v5 to modules imports

* fixing i18n

* Fixing some test around search engine

* Removing all bleve traces

* Cleaning up the vendors directory and go.mod/go.sum files

* Regenerating timer layer

* Adding properly the license

* Fixing govet shadow error

* Fixing some tests

* Fixing TestSearchPostsFromUser

* Fixing another test

* Fixing more tests

* Fixing more tests

* Removing SearchEngine redundant text from searchengine module code

* Fixing some reindexing problems in members updates

* Fixing tests

* Addressing PR comments

* Reverting go.mod and go.sum

* Addressing PR comments

* Fixing tests compilation

* Fixing govet

* Adding search engine stop method

* Being more explicit on where we use includeDeleted

* Adding GetSqlSupplier test helper method

* Mocking elasticsearch start function

* Fixing tests

Co-authored-by: Miguel de la Cruz <miguel@mcrx.me>
Co-authored-by: mattermod <mattermod@users.noreply.github.com>

testlib/helper.go

@@ -12,7 +12,9 @@ import (
 
 	"github.com/mattermost/mattermost-server/v5/mlog"
 	"github.com/mattermost/mattermost-server/v5/model"
+	"github.com/mattermost/mattermost-server/v5/services/searchengine"
 	"github.com/mattermost/mattermost-server/v5/store"
+	"github.com/mattermost/mattermost-server/v5/store/searchlayer"
 	"github.com/mattermost/mattermost-server/v5/store/sqlstore"
 	"github.com/mattermost/mattermost-server/v5/store/storetest"
 	"github.com/mattermost/mattermost-server/v5/utils"
@@ -21,6 +23,7 @@ import (
 type MainHelper struct {
 	Settings         *model.SqlSettings
 	Store            store.Store
+	SearchEngine     *searchengine.Broker
 	SQLSupplier      *sqlstore.SqlSupplier
 	ClusterInterface *FakeClusterInterface
 
@@ -100,11 +103,15 @@ func (h *MainHelper) setupStore() {
 
 	h.Settings = storetest.MakeSqlSettings(driverName)
 
+	config := &model.Config{}
+	config.SetDefaults()
+
+	h.SearchEngine = searchengine.NewBroker(config, nil)
 	h.ClusterInterface = &FakeClusterInterface{}
 	h.SQLSupplier = sqlstore.NewSqlSupplier(*h.Settings, nil)
-	h.Store = &TestStore{
+	h.Store = searchlayer.NewSearchLayer(&TestStore{
 		h.SQLSupplier,
-	}
+	}, h.SearchEngine)
 }
 
 func (h *MainHelper) setupResources() {