cache displaynames in ocs

changelog/unreleased/ocis-cache-displayname.md

@@ -0,0 +1,5 @@
+Bugfix: Cache display names in ocs service
+
+The ocs list shares endpoint may need to fetch the displayname for multiple different users. We are now caching the lookup fo 60 seconds to save redundant RPCs to the users service.
+
+https://github.com/cs3org/reva/pull/1161

internal/http/services/owncloud/ocs/conversions/main.go

@@ -20,6 +20,7 @@
 package conversions
 
 import (
+	"context"
 	"fmt"
 	"net/http"
 	"path"
@@ -272,6 +273,29 @@ func AsCS3Permissions(p int, rp *provider.ResourcePermissions) *provider.Resourc
 	return rp
 }
 
+// UserShare2ShareData converts a cs3api user share into shareData data model
+// TODO(jfd) merge userShare2ShareData with publicShare2ShareData
+func UserShare2ShareData(ctx context.Context, share *collaboration.Share) (*ShareData, error) {
+	sd := &ShareData{
+		Permissions:  UserSharePermissions2OCSPermissions(share.GetPermissions()),
+		ShareType:    ShareTypeUser,
+		UIDOwner:     LocalUserIDToString(share.GetCreator()),
+		UIDFileOwner: LocalUserIDToString(share.GetOwner()),
+		ShareWith:    LocalUserIDToString(share.GetGrantee().GetId()),
+	}
+
+	if share.Id != nil && share.Id.OpaqueId != "" {
+		sd.ID = share.Id.OpaqueId
+	}
+	if share.Ctime != nil {
+		sd.STime = share.Ctime.Seconds // TODO CS3 api birth time = btime
+	}
+	// actually clients should be able to GET and cache the user info themselves ...
+	// TODO only return the userid, let the clientso look up the displayname
+	// TODO check grantee type for user vs group
+	return sd, nil
+}
+
 // PublicShare2ShareData converts a cs3api public share into shareData data model
 func PublicShare2ShareData(share *link.PublicShare, r *http.Request, publicURL string) *ShareData {
 	var expiration string
@@ -281,30 +305,29 @@ func PublicShare2ShareData(share *link.PublicShare, r *http.Request, publicURL s
 		expiration = ""
 	}
 
-	shareWith := ""
-	if share.PasswordProtected {
-		shareWith = "***redacted***"
+	sd := &ShareData{
+		// share.permissions are mapped below
+		// Displaynames are added later
+		ID:           share.Id.OpaqueId,
+		ShareType:    ShareTypePublicLink,
+		STime:        share.Ctime.Seconds, // TODO CS3 api birth time = btime
+		Token:        share.Token,
+		Expiration:   expiration,
+		MimeType:     share.Mtime.String(),
+		Name:         share.DisplayName,
+		MailSend:     0,
+		URL:          publicURL + path.Join("/", "#/s/"+share.Token),
+		Permissions:  publicSharePermissions2OCSPermissions(share.GetPermissions()),
+		UIDOwner:     LocalUserIDToString(share.Creator),
+		UIDFileOwner: LocalUserIDToString(share.Owner),
 	}
 
-	return &ShareData{
-		// share.permissions ar mapped below
-		// DisplaynameOwner:     creator.DisplayName,
-		// DisplaynameFileOwner: share.GetCreator().String(),
-		ID:                   share.Id.OpaqueId,
-		ShareType:            ShareTypePublicLink,
-		ShareWith:            shareWith,
-		ShareWithDisplayname: shareWith,
-		STime:                share.Ctime.Seconds, // TODO CS3 api birth time = btime
-		Token:                share.Token,
-		Expiration:           expiration,
-		MimeType:             share.Mtime.String(),
-		Name:                 share.DisplayName,
-		MailSend:             0,
-		URL:                  publicURL + path.Join("/", "#/s/"+share.Token),
-		Permissions:          publicSharePermissions2OCSPermissions(share.GetPermissions()),
-		UIDOwner:             LocalUserIDToString(share.Creator),
-		UIDFileOwner:         LocalUserIDToString(share.Owner),
+	if share.PasswordProtected {
+		sd.ShareWith = "***redacted***"
+		sd.ShareWithDisplayname = "***redacted***"
 	}
+
+	return sd
 	// actually clients should be able to GET and cache the user info themselves ...
 	// TODO check grantee type for user vs group
 }
@@ -318,6 +341,8 @@ func LocalUserIDToString(userID *userpb.UserId) string {
 }
 
 // UserIDToString transforms a cs3api user id into an ocs data model
+// TODO This should be used instead of LocalUserIDToString bit it requires interpreting an @ on the client side
+// TODO An alternative would be to send the idp / iss as an additional attribute. might be less intrusive
 func UserIDToString(userID *userpb.UserId) string {
 	if userID == nil || userID.OpaqueId == "" {
 		return ""