From 5174966faf99564caf5778092a30376ba00678a7 Mon Sep 17 00:00:00 2001
From: Vincent Petry <pvince81@owncloud.com>
Date: Tue, 26 May 2020 16:09:25 +0200
Subject: [PATCH] Add TUS global capabilities

Advertise global TUS capabilities so that clients can check whether they
should load their TUS functionality.

This is in addition to the existing advertisement using headers on
Webdav PROPFINDS or OPTIONS depending on the underlying storage.

Note that storages could have different TUS capabilities so in the
future we should look into ways to aggregate the capabilities from
configured storages in these global capability attributes.
---
 cmd/reva/gen/gen.go                           |  6 +++++
 .../owncloud/ocs/data/capabilities.go         | 22 ++++++++++++++-----
 .../cloud/capabilities/capabilities.go        | 12 ++++++++++
 3 files changed, 34 insertions(+), 6 deletions(-)

diff --git a/cmd/reva/gen/gen.go b/cmd/reva/gen/gen.go
index 3231f0faaa..d4c015a7d0 100644
--- a/cmd/reva/gen/gen.go
+++ b/cmd/reva/gen/gen.go
@@ -172,6 +172,12 @@ bigfilechunking = true
 blacklisted_files = ["foo"]
 undelete = true
 versioning = true
+[http.services.ocssvc.capabilities.capabilities.files.tus_support]
+version = "1.0.0"
+resumable = "1.0.0"
+extension = "creation,creation-with-upload"
+http_method_override = ""
+max_chunk_size = 0
 [http.services.ocssvc.capabilities.capabilities.dav]
 chunking = "" # set to "1.0" for experimental support
 [http.services.ocssvc.capabilities.capabilities.files_sharing]
diff --git a/internal/http/services/owncloud/ocs/data/capabilities.go b/internal/http/services/owncloud/ocs/data/capabilities.go
index e7c3d85213..4e32942f81 100644
--- a/internal/http/services/owncloud/ocs/data/capabilities.go
+++ b/internal/http/services/owncloud/ocs/data/capabilities.go
@@ -52,7 +52,7 @@ type CapabilitiesData struct {
 type Capabilities struct {
 	Core          *CapabilitiesCore          `json:"core" xml:"core"`
 	Checksums     *CapabilitiesChecksums     `json:"checksums" xml:"checksums"`
-	Files         *CapabilitiesFiles         `json:"files" xml:"files"`
+	Files         *CapabilitiesFiles         `json:"files" xml:"files" mapstructure:"files"`
 	Dav           *CapabilitiesDav           `json:"dav" xml:"dav"`
 	FilesSharing  *CapabilitiesFilesSharing  `json:"files_sharing" xml:"files_sharing" mapstructure:"files_sharing"`
 	Notifications *CapabilitiesNotifications `json:"notifications" xml:"notifications"`
@@ -83,13 +83,23 @@ type CapabilitiesChecksums struct {
 	PreferredUploadType string   `json:"preferredUploadType" xml:"preferredUploadType" mapstructure:"preferred_upload_type"`
 }
 
+// CapabilitiesFilesTusSupport TODO this must be a summry of storages
+type CapabilitiesFilesTusSupport struct {
+	Version            string `json:"version" xml:"version"`
+	Resumable          string `json:"resumable" xml:"resumable"`
+	Extension          string `json:"extension" xml:"extension"`
+	MaxChunkSize       int    `json:"max_chunk_size" xml:"max_chunk_size" mapstructure:"max_chunk_size"`
+	HTTPMethodOverride string `json:"http_method_override" xml:"http_method_override" mapstructure:"http_method_override"`
+}
+
 // CapabilitiesFiles TODO this is storage specific, not global. What effect do these options have on the clients?
 type CapabilitiesFiles struct {
-	PrivateLinks     ocsBool  `json:"privateLinks" xml:"privateLinks" mapstructure:"private_links"`
-	BigFileChunking  ocsBool  `json:"bigfilechunking" xml:"bigfilechunking"`
-	Undelete         ocsBool  `json:"undelete" xml:"undelete"`
-	Versioning       ocsBool  `json:"versioning" xml:"versioning"`
-	BlacklistedFiles []string `json:"blacklisted_files" xml:"blacklisted_files>element" mapstructure:"blacklisted_files"`
+	PrivateLinks     ocsBool                      `json:"privateLinks" xml:"privateLinks" mapstructure:"private_links"`
+	BigFileChunking  ocsBool                      `json:"bigfilechunking" xml:"bigfilechunking"`
+	Undelete         ocsBool                      `json:"undelete" xml:"undelete"`
+	Versioning       ocsBool                      `json:"versioning" xml:"versioning"`
+	BlacklistedFiles []string                     `json:"blacklisted_files" xml:"blacklisted_files>element" mapstructure:"blacklisted_files"`
+	TusSupport       *CapabilitiesFilesTusSupport `json:"tus_support" xml:"tus_support" mapstructure:"tus_support"`
 }
 
 // CapabilitiesDav holds dav endpoint config
diff --git a/internal/http/services/owncloud/ocs/handlers/cloud/capabilities/capabilities.go b/internal/http/services/owncloud/ocs/handlers/cloud/capabilities/capabilities.go
index 1cf373e0b2..540c3b6224 100644
--- a/internal/http/services/owncloud/ocs/handlers/cloud/capabilities/capabilities.go
+++ b/internal/http/services/owncloud/ocs/handlers/cloud/capabilities/capabilities.go
@@ -101,6 +101,18 @@ func (h *Handler) Init(c *config.Config) {
 	// h.c.Capabilities.Files.Undelete is boolean
 	// h.c.Capabilities.Files.Versioning is boolean
 
+	if h.c.Capabilities.Files.TusSupport == nil {
+		// these are global capabilities
+		// TODO: infer from various TUS handlers from all known storages
+		h.c.Capabilities.Files.TusSupport = &data.CapabilitiesFilesTusSupport{
+			Version:            "1.0.0",
+			Resumable:          "1.0.0",
+			Extension:          "creation,creation-with-upload",
+			MaxChunkSize:       0,
+			HTTPMethodOverride: "",
+		}
+	}
+
 	// dav
 
 	if h.c.Capabilities.Dav == nil {