server/public/ -- pre-requisite changes (#23278)

* invert depdendency: filestore -> model

* markdown: nolint:misspell

* inline jsonutils within model

* push model.GetInfoForBytes -> channels/app

* push channel/utils.CompileGo* -> plugin/utils

* push plugin/scheduler -> channels/jobs/plugins

* push utils.Copy(File|Dir) -> model

* oauthproiders/gitlab -> channels/app/oauthproviders/gitlab

* decouple plugin from einterfaces.MetricsInterface

* fix TestGetInfoForFile

* Revert "Run golangci in server CI (#23240)"

This reverts commit 349e5d4573.

* add model/utils

---------

Co-authored-by: Agniva De Sarker <agnivade@yahoo.co.in>

server/platform/shared/filestore/filesstore.go

@@ -8,6 +8,7 @@ import (
 	"io"
 	"time"
 
+	"github.com/mattermost/mattermost-server/server/v8/model"
 	"github.com/pkg/errors"
 )
 
@@ -57,6 +58,30 @@ type FileBackendSettings struct {
 	AmazonS3RequestTimeoutMilliseconds int64
 }
 
+func NewFileBackendSettingsFromConfig(fileSettings *model.FileSettings, enableComplianceFeature bool, skipVerify bool) FileBackendSettings {
+	if *fileSettings.DriverName == model.ImageDriverLocal {
+		return FileBackendSettings{
+			DriverName: *fileSettings.DriverName,
+			Directory:  *fileSettings.Directory,
+		}
+	}
+	return FileBackendSettings{
+		DriverName:                         *fileSettings.DriverName,
+		AmazonS3AccessKeyId:                *fileSettings.AmazonS3AccessKeyId,
+		AmazonS3SecretAccessKey:            *fileSettings.AmazonS3SecretAccessKey,
+		AmazonS3Bucket:                     *fileSettings.AmazonS3Bucket,
+		AmazonS3PathPrefix:                 *fileSettings.AmazonS3PathPrefix,
+		AmazonS3Region:                     *fileSettings.AmazonS3Region,
+		AmazonS3Endpoint:                   *fileSettings.AmazonS3Endpoint,
+		AmazonS3SSL:                        fileSettings.AmazonS3SSL == nil || *fileSettings.AmazonS3SSL,
+		AmazonS3SignV2:                     fileSettings.AmazonS3SignV2 != nil && *fileSettings.AmazonS3SignV2,
+		AmazonS3SSE:                        fileSettings.AmazonS3SSE != nil && *fileSettings.AmazonS3SSE && enableComplianceFeature,
+		AmazonS3Trace:                      fileSettings.AmazonS3Trace != nil && *fileSettings.AmazonS3Trace,
+		AmazonS3RequestTimeoutMilliseconds: *fileSettings.AmazonS3RequestTimeoutMilliseconds,
+		SkipVerify:                         skipVerify,
+	}
+}
+
 func (settings *FileBackendSettings) CheckMandatoryS3Fields() error {
 	if settings.AmazonS3Bucket == "" {
 		return errors.New("missing s3 bucket settings")