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handler-virtual-browser.go
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/
handler-virtual-browser.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"
"io"
"strings"
"github.com/micro/go-micro/client"
"go.uber.org/zap"
"github.com/pydio/cells/common/log"
"github.com/pydio/cells/common/proto/tree"
)
// VirtualNodesBrowser is used by admin mode to list virtual nodes instead of their resolved values.
type VirtualNodesBrowser struct {
AbstractHandler
}
func NewVirtualNodesBrowser() *VirtualNodesBrowser {
return &VirtualNodesBrowser{}
}
// ReadNode creates a fake node if admin is reading info about a virtual node
func (v *VirtualNodesBrowser) ReadNode(ctx context.Context, in *tree.ReadNodeRequest, opts ...client.CallOption) (*tree.ReadNodeResponse, error) {
if virtual, exists := GetVirtualNodesManager().ByPath(in.Node.Path); exists {
log.Logger(ctx).Debug("Virtual Node Browser, Found", zap.Any("found", virtual))
return &tree.ReadNodeResponse{Node: virtual}, nil
}
return v.next.ReadNode(ctx, in, opts...)
}
// ListNodes Append virtual nodes to the datasources list if admin is listing the root of the tree
func (v *VirtualNodesBrowser) ListNodes(ctx context.Context, in *tree.ListNodesRequest, opts ...client.CallOption) (streamer tree.NodeProvider_ListNodesClient, e error) {
vManager := GetVirtualNodesManager()
if virtual, exists := vManager.ByPath(in.Node.Path); exists {
log.Logger(ctx).Debug("Virtual Node Browser, Found, send no children", zap.Any("found", virtual))
s := NewWrappingStreamer()
defer s.Close()
return s, nil
}
if strings.Trim(in.Node.Path, "/") != "" {
return v.next.ListNodes(ctx, in, opts...)
}
stream, err := v.next.ListNodes(ctx, in, opts...)
if err != nil {
return nil, err
}
s := NewWrappingStreamer()
go func() {
vManager.Load(true)
defer stream.Close()
defer s.Close()
for {
resp, err := stream.Recv()
if err != nil {
if err != io.EOF && err != io.ErrUnexpectedEOF {
s.SendError(err)
}
break
}
if resp == nil {
continue
}
s.Send(resp)
}
for _, n := range vManager.ListNodes() {
s.Send(&tree.ListNodesResponse{Node: n})
}
}()
return s, nil
}