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handler-path-multiple-roots.go
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handler-path-multiple-roots.go
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/*
* Copyright (c) 2019-2021. Abstrium SAS <team (at) pydio.com>
* This file is part of Pydio Cells.
*
* Pydio Cells is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Pydio Cells is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with Pydio Cells. If not, see <http://www.gnu.org/licenses/>.
*
* The latest code can be found at <https://pydio.com>.
*/
package views
import (
"context"
"strings"
"github.com/micro/go-micro/client"
"github.com/micro/go-micro/errors"
"go.uber.org/zap"
"github.com/pydio/cells/common"
"github.com/pydio/cells/common/log"
"github.com/pydio/cells/common/proto/idm"
"github.com/pydio/cells/common/proto/object"
"github.com/pydio/cells/common/proto/tree"
)
// MultipleRootsHandler handle special case of multiple-roots workspaces.
type MultipleRootsHandler struct {
AbstractBranchFilter
}
func NewPathMultipleRootsHandler() *MultipleRootsHandler {
m := &MultipleRootsHandler{}
m.outputMethod = m.updateOutputBranch
m.inputMethod = m.updateInputBranch
return m
}
func (m *MultipleRootsHandler) setWorkspaceRootFlag(ws *idm.Workspace, node *tree.Node) *tree.Node {
if strings.Trim(node.Path, "/") == "" {
out := node.Clone()
out.SetMeta(common.MetaFlagWorkspaceRoot, "true")
if attributes := ws.LoadAttributes(); attributes.SkipRecycle {
out.SetMeta("ws_skip_recycle", "true")
}
return out
} else {
return node
}
}
func (m *MultipleRootsHandler) updateInputBranch(ctx context.Context, node *tree.Node, identifier string) (context.Context, *tree.Node, error) {
branch, set := GetBranchInfo(ctx, identifier)
//log.Logger(ctx).Info("updateInput", zap.Any("branch", branch), zap.Bool("set", set), node.Zap())
if !set || branch.UUID == "ROOT" || branch.Client != nil {
return ctx, node, nil
}
if len(branch.RootUUIDs) == 1 {
rootNode, err := m.getRoot(branch.RootUUIDs[0])
if err != nil {
return ctx, node, err
}
if !rootNode.IsLeaf() {
branch.Root = rootNode
return WithBranchInfo(ctx, identifier, branch), m.setWorkspaceRootFlag(&branch.Workspace, node), nil
}
}
// There are multiple root nodes: detect /node-uuid/ segment in the path
out := node.Clone()
parts := strings.Split(strings.Trim(node.Path, "/"), "/")
if len(parts) > 0 {
rootId := parts[0]
rootKeys, e := m.rootKeysMap(branch.RootUUIDs)
if e != nil {
return ctx, out, e
}
for key, rNode := range rootKeys {
if key == rootId || rootId == rNode.GetUuid() {
branch.Root = rNode
out.Path = strings.Join(parts[1:], "/") // Replace path parts
ctx = WithBranchInfo(ctx, identifier, branch)
break
}
}
}
if branch.Root == nil {
return ctx, node, errors.NotFound(VIEWS_LIBRARY_NAME, "Could not find root node")
}
return ctx, m.setWorkspaceRootFlag(&branch.Workspace, out), nil
}
func (m *MultipleRootsHandler) updateOutputBranch(ctx context.Context, node *tree.Node, identifier string) (context.Context, *tree.Node, error) {
branch, set := GetBranchInfo(ctx, identifier)
out := node.Clone()
if set && branch.UUID != "ROOT" {
if branch.EncryptionMode != object.EncryptionMode_CLEAR {
out.SetMeta(common.MetaFlagEncrypted, "true")
}
if branch.VersioningPolicyName != "" {
out.SetMeta(common.MetaFlagVersioning, "true")
}
}
if !set || branch.UUID == "ROOT" || len(branch.RootUUIDs) < 2 {
return ctx, m.setWorkspaceRootFlag(&branch.Workspace, out), nil
}
if len(branch.RootUUIDs) == 1 {
root, _ := m.getRoot(branch.RootUUIDs[0])
if !root.IsLeaf() {
return ctx, m.setWorkspaceRootFlag(&branch.Workspace, out), nil
}
}
if branch.Root == nil {
return ctx, node, errors.InternalServerError(VIEWS_LIBRARY_NAME, "No Root defined, this is not normal")
}
// Prepend root node Uuid
out = m.setWorkspaceRootFlag(&branch.Workspace, out)
out.Path = m.makeRootKey(branch.Root) + "/" + strings.TrimLeft(node.Path, "/")
return ctx, out, nil
}
func (m *MultipleRootsHandler) ListNodes(ctx context.Context, in *tree.ListNodesRequest, opts ...client.CallOption) (tree.NodeProvider_ListNodesClient, error) {
// First try, without modifying ctx & node
_, out, err := m.updateInputBranch(ctx, in.Node, "in")
if err != nil && errors.Parse(err.Error()).Status == "Not Found" {
branch, _ := GetBranchInfo(ctx, "in")
streamer := NewWrappingStreamer()
nodes, e := m.rootKeysMap(branch.RootUUIDs)
if e != nil {
return streamer, e
}
go func() {
defer streamer.Close()
for rKey, rNode := range nodes {
node := rNode.Clone()
node.Path = rKey
// Re-read node to make sure it goes through other layers - Duplicate context
localCtx := WithBranchInfo(ctx, "in", branch)
t, e := m.ReadNode(localCtx, &tree.ReadNodeRequest{Node: node})
if e != nil {
log.Logger(ctx).Error("[Handler Multiple Root] Cannot read root node", zap.Error(e))
continue
}
node = t.Node
node.Path = rKey
if strings.HasPrefix(node.GetUuid(), "DATASOURCE:") {
node.SetMeta(common.MetaNamespaceNodeName, strings.TrimPrefix(node.GetUuid(), "DATASOURCE:"))
}
node.SetMeta(common.MetaFlagWorkspaceRoot, "true")
log.Logger(ctx).Debug("[Multiple Root] Sending back node", node.Zap())
streamer.Send(&tree.ListNodesResponse{Node: node})
}
}()
return streamer, nil
}
in.Node = out
return m.AbstractBranchFilter.ListNodes(ctx, in, opts...)
}
func (m *MultipleRootsHandler) ReadNode(ctx context.Context, in *tree.ReadNodeRequest, opts ...client.CallOption) (*tree.ReadNodeResponse, error) {
// First try, without modifying ctx & node
_, out, err := m.updateInputBranch(ctx, in.Node, "in")
if err != nil && errors.Parse(err.Error()).Status == "Not Found" && (in.Node.Path == "/" || in.Node.Path == "") {
// Load root nodes and
// return a fake root node
branch, _ := GetBranchInfo(ctx, "in")
nodes, e := m.rootKeysMap(branch.RootUUIDs)
if e != nil {
return &tree.ReadNodeResponse{Success: true, Node: &tree.Node{Path: ""}}, nil
}
fakeNode := &tree.Node{
Path: "",
Type: tree.NodeType_COLLECTION,
Size: 0,
MTime: 0,
}
for _, node := range nodes {
fakeNode.Size += node.Size
if node.MTime > fakeNode.MTime {
fakeNode.MTime = node.MTime
}
}
fakeNode.SetMeta(common.MetaNamespaceNodeName, branch.Workspace.Label)
fakeNode.SetMeta(common.MetaFlagVirtualRoot, "true")
if branch.Workspace.Scope != idm.WorkspaceScope_LINK {
fakeNode.SetMeta(common.MetaFlagLevelReadonly, "true")
}
return &tree.ReadNodeResponse{Success: true, Node: fakeNode}, nil
}
in.Node = out
return m.AbstractBranchFilter.ReadNode(ctx, in, opts...)
}