move file backend to the platform service (#21365)

app/platform/options.go

@@ -11,6 +11,7 @@ import (
 	"github.com/mattermost/mattermost-server/v6/config"
 	"github.com/mattermost/mattermost-server/v6/einterfaces"
 	"github.com/mattermost/mattermost-server/v6/model"
+	"github.com/mattermost/mattermost-server/v6/shared/filestore"
 	"github.com/mattermost/mattermost-server/v6/shared/mlog"
 	"github.com/mattermost/mattermost-server/v6/store"
 	"github.com/mattermost/mattermost-server/v6/store/localcachelayer"
@@ -74,6 +75,13 @@ func Config(dsn string, readOnly bool, configDefaults *model.Config) Option {
 	}
 }
 
+func SetFileStore(filestore filestore.FileBackend) Option {
+	return func(ps *PlatformService) error {
+		ps.filestore = filestore
+		return nil
+	}
+}
+
 // ConfigStore applies the given config store, typically to replace the traditional sources with a memory store for testing.
 func ConfigStore(configStore *config.Store) Option {
 	return func(ps *PlatformService) error {

app/platform/service.go

@@ -20,6 +20,7 @@ import (
 	"github.com/mattermost/mattermost-server/v6/services/cache"
 	"github.com/mattermost/mattermost-server/v6/services/searchengine"
 	"github.com/mattermost/mattermost-server/v6/services/searchengine/bleveengine"
+	"github.com/mattermost/mattermost-server/v6/shared/filestore"
 	"github.com/mattermost/mattermost-server/v6/shared/mlog"
 	"github.com/mattermost/mattermost-server/v6/store"
 	"github.com/mattermost/mattermost-server/v6/store/localcachelayer"
@@ -41,6 +42,8 @@ type PlatformService struct {
 
 	configStore *config.Store
 
+	filestore filestore.FileBackend
+
 	cacheProvider cache.Provider
 	statusCache   cache.Cache
 	sessionCache  cache.Cache
@@ -213,6 +216,18 @@ func New(sc ServiceConfig, options ...Option) (*PlatformService, error) {
 		}
 	}
 
+	license := ps.License()
+	// Step 3: Initialize filestore
+	if ps.filestore == nil {
+		insecure := ps.Config().ServiceSettings.EnableInsecureOutgoingConnections
+		backend, err2 := filestore.NewFileBackend(ps.Config().FileSettings.ToFileBackendSettings(license != nil && *license.Features.Compliance, insecure != nil && *insecure))
+		if err2 != nil {
+			return nil, fmt.Errorf("failed to initialize filebackend: %w", err2)
+		}
+
+		ps.filestore = backend
+	}
+
 	var err error
 	ps.Store, err = ps.newStore()
 	if err != nil {
@@ -431,3 +446,7 @@ func (ps *PlatformService) GetPluginStatuses() (model.PluginStatuses, *model.App
 
 	return pluginStatuses, nil
 }
+
+func (ps *PlatformService) FileBackend() filestore.FileBackend {
+	return ps.filestore
+}