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nodes-selector.go
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nodes-selector.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 jobs
import (
"context"
"fmt"
"io"
"path"
"strings"
"github.com/pydio/cells/v4/common/client/grpc"
"go.uber.org/zap"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/types/known/anypb"
"github.com/pydio/cells/v4/common"
"github.com/pydio/cells/v4/common/log"
"github.com/pydio/cells/v4/common/proto/service"
"github.com/pydio/cells/v4/common/proto/tree"
)
type FreeStringEvaluator func(ctx context.Context, query string, node *tree.Node) bool
var (
freeStringEvaluator FreeStringEvaluator
)
func RegisterNodesFreeStringEvaluator(f FreeStringEvaluator) {
freeStringEvaluator = f
}
type NodeMatcher struct {
*tree.Query
}
func (n *NodeMatcher) Matches(object interface{}) bool {
if node, ok := object.(*tree.Node); ok {
return evaluateSingleQuery(n.Query, node)
} else {
return false
}
}
func (n *NodesSelector) MultipleSelection() bool {
return n.Collect
}
func (n *NodesSelector) SelectorID() string {
return "NodesSelector"
}
func (n *NodesSelector) FilterID() string {
return "NodesFilter"
}
func (n *NodesSelector) Select(ctx context.Context, input *ActionMessage, objects chan interface{}, done chan bool) error {
defer func() {
done <- true
}()
selector := n.evaluatedClone(ctx, input)
// Absolute Paths pre-specified, just pass them without checking for existence
if len(selector.Pathes) > 0 {
for _, p := range selector.Pathes {
objects <- &tree.Node{
Path: p,
}
}
return nil
}
// FanOut existing values from Input.Nodes and return
if selector.FanOutInput {
for _, n := range input.Nodes {
objects <- n.Clone()
}
return nil
}
// Now handle query
q := &tree.Query{}
if !selector.All && (selector.Query == nil || selector.Query.SubQueries == nil || len(selector.Query.SubQueries) == 0) {
return nil
}
if e := anypb.UnmarshalTo(selector.Query.SubQueries[0], q, proto.UnmarshalOptions{}); e != nil {
log.Logger(ctx).Error("Could not parse input query", zap.Error(e))
return e
}
if e := q.ParseDurationDate(); e != nil {
log.Logger(ctx).Error("Error while parsing DurationDate", zap.Error(e))
return e
}
// If paths are preset, just load nodes and do not go further
if len(q.Paths) > 0 {
sCli := tree.NewNodeProviderClient(grpc.GetClientConnFromCtx(ctx, common.ServiceTree))
for _, p := range q.Paths {
if r, e := sCli.ReadNode(ctx, &tree.ReadNodeRequest{Node: &tree.Node{Path: p}}); e == nil {
objects <- r.GetNode()
}
}
return nil
}
// If UUIDs are preset, just load nodes and do not go further
if len(q.UUIDs) > 0 {
sCli := tree.NewNodeProviderClient(grpc.GetClientConnFromCtx(ctx, common.ServiceTree))
for _, uuid := range q.UUIDs {
if r, e := sCli.ReadNode(ctx, &tree.ReadNodeRequest{Node: &tree.Node{Uuid: uuid}}); e == nil {
objects <- r.GetNode()
}
}
return nil
}
filter := func(n *tree.Node) bool {
return true
}
var total int
if q.FreeString != "" || q.Content != "" || q.FileNameOrContent != "" {
// Use the Search Service, relaunch search as long as there are results (request size cannot be empty)
// Search Service does not support PathDepth, reapply filtering on output
if q.PathDepth > 0 {
filter = func(n *tree.Node) bool {
depth := int32(len(strings.Split(strings.Trim(n.GetPath(), "/"), "/")))
return depth == q.PathDepth
}
} else if q.PathDepth == -1 && len(q.PathPrefix) == 1 {
// Special -1 case : just look for Depth(PathPrefix) + 1
filter = func(n *tree.Node) bool {
depth := int32(len(strings.Split(strings.Trim(n.GetPath(), "/"), "/")))
refDepth := int32(len(strings.Split(strings.Trim(q.PathPrefix[0], "/"), "/")))
return depth == refDepth+1
}
}
var cursor int32
size := int32(50)
for {
req := &tree.SearchRequest{
Query: q,
Details: true,
From: cursor,
Size: size,
}
res, loadMore, err := n.performListing(ctx, common.ServiceSearch, req, filter, objects)
if err != nil {
return err
}
total += res
if loadMore {
cursor += size
} else {
break
}
}
} else {
// For simple requests, directly use the Tree service
var e error
req := &tree.SearchRequest{
Query: q,
Details: true,
}
total, _, e = n.performListing(ctx, common.ServiceTree, req, filter, objects)
if e != nil {
return e
}
}
log.Logger(ctx).Info("Selector finished request with query", zap.Any("q", q), zap.Int("count", total))
return nil
}
func (n *NodesSelector) performListing(ctx context.Context, serviceName string, req *tree.SearchRequest, filter func(n *tree.Node) bool, objects chan interface{}) (int, bool, error) {
treeClient := tree.NewSearcherClient(grpc.GetClientConnFromCtx(ctx, serviceName))
sStream, eR := treeClient.Search(ctx, req)
if eR != nil {
return 0, false, eR
}
var received int32
var count int
var stErr error
defer sStream.CloseSend()
for {
resp, rE := sStream.Recv()
if rE != nil {
if rE != io.EOF {
stErr = rE
}
break
}
if resp == nil || resp.Node == nil {
continue
}
received++
if !filter(resp.GetNode()) {
continue
}
log.Logger(ctx).Debug("Search Request with query received Node", resp.Node.ZapPath())
objects <- resp.Node
count++
}
mayHaveMore := req.Size > 0 && received == req.Size
return count, mayHaveMore, stErr
}
func (n *NodesSelector) Filter(ctx context.Context, input *ActionMessage) (*ActionMessage, *ActionMessage, bool) {
var excluded []*tree.Node
if len(input.Nodes) == 0 {
return input, nil, false
}
if n.All {
return input, nil, true
}
selector := n.evaluatedClone(ctx, input)
var newNodes []*tree.Node
var multi *service.MultiMatcher
if selector.Query != nil && len(selector.Query.SubQueries) > 0 {
multi = &service.MultiMatcher{}
if er := multi.Parse(selector.Query, func(o *anypb.Any) (service.Matcher, error) {
target := &tree.Query{}
if e := anypb.UnmarshalTo(o, target, proto.UnmarshalOptions{}); e != nil {
return nil, e
}
return &NodeMatcher{Query: target}, nil
}); er != nil {
fmt.Println("Error while parsing query", er)
}
}
for _, node := range input.Nodes {
if len(selector.Pathes) > 0 {
if contains(selector.Pathes, node.Path, false, false) {
newNodes = append(newNodes, node)
} else {
excluded = append(excluded, node)
}
continue
}
if multi != nil {
if multi.Matches(node) {
newNodes = append(newNodes, node)
} else {
excluded = append(excluded, node)
}
}
}
output := input
output.Nodes = newNodes
var xx *ActionMessage
if len(excluded) > 0 {
xx = input.Clone()
xx.Nodes = excluded
}
return output, xx, len(newNodes) > 0
}
func (n *NodesSelector) evaluatedClone(ctx context.Context, input *ActionMessage) *NodesSelector {
if len(GetFieldEvaluators()) == 0 {
return n
}
c := proto.Clone(n).(*NodesSelector)
for i, p := range c.Pathes {
c.Pathes[i] = EvaluateFieldStr(ctx, input, p)
}
if c.Query != nil && len(c.Query.SubQueries) > 0 {
for i, q := range c.Query.SubQueries {
singleQuery := &tree.Query{}
if e := anypb.UnmarshalTo(q, singleQuery, proto.UnmarshalOptions{}); e != nil {
continue
}
singleQuery.Content = EvaluateFieldStr(ctx, input, singleQuery.Content)
singleQuery.DurationDate = EvaluateFieldStr(ctx, input, singleQuery.DurationDate)
singleQuery.FileName = EvaluateFieldStr(ctx, input, singleQuery.FileName)
singleQuery.FileNameOrContent = EvaluateFieldStr(ctx, input, singleQuery.FileNameOrContent)
singleQuery.FreeString = EvaluateFieldStr(ctx, input, singleQuery.FreeString)
singleQuery.Extension = EvaluateFieldStr(ctx, input, singleQuery.Extension)
singleQuery.PathPrefix = EvaluateFieldStrSlice(ctx, input, singleQuery.PathPrefix)
singleQuery.Paths = EvaluateFieldStrSlice(ctx, input, singleQuery.Paths)
singleQuery.UUIDs = EvaluateFieldStrSlice(ctx, input, singleQuery.UUIDs)
c.Query.SubQueries[i], _ = anypb.New(singleQuery)
}
}
return c
}
func contains(slice []string, value string, prefix bool, lower bool) bool {
if lower {
value = strings.ToLower(value)
}
for _, v := range slice {
if lower {
v = strings.ToLower(v)
}
if prefix && strings.HasPrefix(value, v) {
return true
} else if !prefix && value == v {
return true
}
}
return false
}
func evaluateSingleQuery(q *tree.Query, node *tree.Node) (result bool) {
defer func() {
// Invert result if q.Not
if q.Not {
result = !result
}
}()
if len(q.Paths) > 0 {
if !contains(q.Paths, node.Path, false, false) {
return false
}
}
if len(q.UUIDs) > 0 {
if !contains(q.UUIDs, node.Uuid, false, false) {
return false
}
}
if len(q.PathPrefix) > 0 {
if !contains(q.PathPrefix, node.Path, true, false) {
return false
}
}
if (q.MinSize > 0 && node.Size < q.MinSize) || (q.MaxSize > 0 && node.Size > q.MaxSize) {
return false
}
if er := q.ParseDurationDate(); er != nil {
fmt.Println("[warn] Error while parsing Duration: " + er.Error())
}
if (q.MinDate > 0 && node.MTime < q.MinDate) || (q.MaxDate > 0 && node.MTime > q.MaxDate) {
return false
}
if (q.Type == tree.NodeType_COLLECTION && node.IsLeaf()) || (q.Type == tree.NodeType_LEAF && !node.IsLeaf()) {
return false
}
if q.PathDepth > 0 && len(strings.Split(strings.Trim(node.Path, "/"), "/")) != int(q.PathDepth) {
return false
}
if len(q.FileNameOrContent) > 0 {
fmt.Println("[warn] Filtering on FileNameOrContent is not supported yet, switching to Filename")
q.FileName = q.FileNameOrContent
}
if len(q.Content) != 0 {
// Read content??
fmt.Println("[warn] Dynamic filtering on Content is not supported yet - ignoring")
}
if len(q.FileName) != 0 {
// Basic search: can have wildcard on left, right, or none (exact search)
nodeName := node.GetStringMeta(common.MetaNamespaceNodeName)
if len(nodeName) == 0 {
nodeName = path.Base(node.Path)
}
var left, right bool
if strings.HasPrefix(q.FileName, "*") {
left = true
}
if strings.HasSuffix(q.FileName, "*") {
right = true
}
search := strings.Trim(q.FileName, "*")
if left || right {
// If not exact search, lowerCase
nodeName = strings.ToLower(nodeName)
search = strings.ToLower(search)
}
if left && right && !strings.Contains(nodeName, search) { // *part*
return false
} else if right && !left && !strings.HasPrefix(nodeName, search) { // start*
return false
} else if left && !right && !strings.HasSuffix(nodeName, search) { // *end
return false
} else if !left && !right && nodeName != search { // exact term
return false
}
}
if len(q.Extension) > 0 {
// Can be "ext1,ext2,ext3"
exts := strings.Split(q.Extension, ",")
nodeName := node.GetStringMeta(common.MetaNamespaceNodeName)
if len(nodeName) == 0 {
nodeName = path.Base(node.Path)
}
nodeExt := strings.TrimLeft(path.Ext(nodeName), ".")
if !contains(exts, nodeExt, false, true) {
return false
}
}
// Bleve-style query string
if len(q.FreeString) > 0 {
if freeStringEvaluator == nil {
log.Logger(context.Background()).Error("Warning, no FreeStringEvaluator was registered for nodes selector")
return false
} else {
return freeStringEvaluator(context.Background(), q.FreeString, node)
}
}
return true
}