[PLT-7475] Add S3 region to system console and add S3 validation (#7373)

* add S3 region to system console and add S3 validation

* update translation message

* add bool as return value to Validate* functions

* update Validate* functions to be pure

app/admin.go

@@ -11,13 +11,14 @@ import (
 
 	"runtime/debug"
 
+	"net/http"
+
 	l4g "github.com/alecthomas/log4go"
 	"github.com/mattermost/platform/einterfaces"
 	"github.com/mattermost/platform/jobs"
 	"github.com/mattermost/platform/model"
 	"github.com/mattermost/platform/store"
 	"github.com/mattermost/platform/utils"
-	"net/http"
 )
 
 func GetLogs(page, perPage int) ([]string, *model.AppError) {
@@ -153,6 +154,34 @@ func SaveConfig(cfg *model.Config, sendConfigChangeClusterMessage bool) *model.A
 		return err
 	}
 
+	if *cfg.FileSettings.DriverName == model.IMAGE_DRIVER_S3 {
+		if !utils.ValidateAmazonS3Endpoint(*cfg.FileSettings.AmazonS3Endpoint) {
+			*cfg.FileSettings.AmazonS3Endpoint = model.FILE_SETTINGS_DEFAULT_AMAZON_S3_ENDPOINT
+			l4g.Warn(utils.T("utils.config.set_amazon_endpoint"), model.FILE_SETTINGS_DEFAULT_AMAZON_S3_ENDPOINT)
+		}
+
+		if !utils.ValidateAmazonS3Region(*cfg.FileSettings.AmazonS3Region) {
+			*cfg.FileSettings.AmazonS3Region = model.FILE_SETTINGS_DEFAULT_AMAZON_S3_REGION
+			l4g.Warn(utils.T("utils.config.set_amazon_region"), model.FILE_SETTINGS_DEFAULT_AMAZON_S3_REGION)
+		}
+
+		_, bucketLocation, err := utils.ValidateAmazonS3Bucket(cfg)
+		if err != nil {
+			return err
+		}
+
+		for endpoint, region := range utils.AWS_S3_ENDPOINT_MAP {
+			if bucketLocation == *cfg.FileSettings.AmazonS3Region {
+				*cfg.FileSettings.AmazonS3Endpoint = endpoint
+				l4g.Warn(utils.T("utils.config.set_amazon_endpoint"), endpoint)
+
+				*cfg.FileSettings.AmazonS3Region = region
+				l4g.Warn(utils.T("utils.config.set_amazon_region"), region)
+				break
+			}
+		}
+	}
+
 	if *utils.Cfg.ClusterSettings.Enable && *utils.Cfg.ClusterSettings.ReadOnlyConfig {
 		return model.NewAppError("saveConfig", "ent.cluster.save_config.error", nil, "", http.StatusForbidden)
 	}