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walker.go
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walker.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 nodes
import (
"context"
"strings"
"time"
"github.com/pydio/cells/v4/common"
"github.com/pydio/cells/v4/common/proto/tree"
)
// HandlerListNodesWithCallback is a generic implementation of ListNodesWithCallback for any Handler. Used by Client, Handler and HandlerMock
func HandlerListNodesWithCallback(v Handler, ctx context.Context, request *tree.ListNodesRequest, callback WalkFunc, ignoreCbError bool, filters ...WalkFilterFunc) error {
r, e := v.ReadNode(ctx, &tree.ReadNodeRequest{Node: &tree.Node{Path: request.Node.Path}})
if e != nil {
return e
}
skipFirst := false
firstFilters := append(filters, func(ctx context.Context, node *tree.Node) bool {
return request.FilterType == tree.NodeType_UNKNOWN || r.GetNode().Type == request.FilterType
})
for _, f := range firstFilters {
if !f(ctx, r.GetNode()) {
skipFirst = true
break
}
}
if !skipFirst {
if eC := callback(ctx, r.GetNode(), nil); eC != nil && !ignoreCbError {
return eC
}
}
ctx, cancel := context.WithTimeout(ctx, 6*time.Hour)
defer cancel()
nodeClient, err := v.ListNodes(ctx, request)
if err != nil {
return err
}
defer nodeClient.CloseSend()
loop:
for {
clientResponse, err := nodeClient.Recv()
if clientResponse == nil || err != nil {
break
}
n := clientResponse.GetNode()
for _, f := range filters {
if !f(ctx, n) {
continue loop
}
}
if e := callback(ctx, n, nil); e != nil && !ignoreCbError {
return e
}
}
return nil
}
// WalkFilterSkipPydioHiddenFile is a preset filter ignoring PydioSyncHiddenFile entries
func WalkFilterSkipPydioHiddenFile(_ context.Context, node *tree.Node) bool {
return !strings.HasSuffix(node.Path, common.PydioSyncHiddenFile)
}