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virtual-nodes-manager.go
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/
virtual-nodes-manager.go
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/*
* Copyright (c) 2018. 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"
"time"
"github.com/golang/protobuf/jsonpb"
"github.com/golang/protobuf/ptypes"
"github.com/golang/protobuf/ptypes/any"
"github.com/micro/go-micro/errors"
"github.com/patrickmn/go-cache"
"go.uber.org/zap"
"github.com/pydio/cells/common"
"github.com/pydio/cells/common/log"
"github.com/pydio/cells/common/micro"
"github.com/pydio/cells/common/proto/docstore"
"github.com/pydio/cells/common/proto/idm"
"github.com/pydio/cells/common/proto/tree"
"github.com/pydio/cells/common/service/proto"
"github.com/pydio/cells/common/utils/permissions"
)
var (
vManager *VirtualNodesManager
vManagerCache *cache.Cache
)
// VirtualNodesManager keeps an internal list of virtual nodes.
// They are cached for one minute to avoid too many requests on docstore service.
type VirtualNodesManager struct {
VirtualNodes []*tree.Node
}
// GetVirtualNodesManager creates a new VirtualNodesManager.
func GetVirtualNodesManager() *VirtualNodesManager {
if vManagerCache == nil {
vManagerCache = cache.New(time.Second*60, time.Second*120)
}
if vManager != nil {
vManager.Load()
return vManager
}
vManager = &VirtualNodesManager{}
vManager.Load()
return vManager
}
// Load requests the virtual nodes from the DocStore service.
func (m *VirtualNodesManager) Load(forceReload ...bool) {
if len(forceReload) == 0 || !forceReload[0] {
if vNodes, found := vManagerCache.Get("virtual-nodes"); found {
m.VirtualNodes = vNodes.([]*tree.Node)
return
}
}
log.Logger(context.Background()).Debug("Reloading virtual nodes to cache")
m.VirtualNodes = []*tree.Node{}
cli := docstore.NewDocStoreClient(common.SERVICE_GRPC_NAMESPACE_+common.SERVICE_DOCSTORE, defaults.NewClient())
stream, e := cli.ListDocuments(context.Background(), &docstore.ListDocumentsRequest{
StoreID: common.DOCSTORE_ID_VIRTUALNODES,
Query: &docstore.DocumentQuery{},
})
if e != nil {
return
}
defer stream.Close()
for {
resp, err := stream.Recv()
if err != nil {
break
}
if resp == nil {
continue
}
data := resp.Document.Data
node := tree.Node{}
er := jsonpb.UnmarshalString(data, &node)
if er != nil {
log.Logger(context.Background()).Error("Cannot unmarshal data: "+data, zap.Error(er))
} else {
log.Logger(context.Background()).Debug("Loading virtual node: ", zap.Any("node", node))
m.VirtualNodes = append(m.VirtualNodes, &node)
}
}
vManagerCache.Set("virtual-nodes", m.VirtualNodes, cache.DefaultExpiration)
}
// ByUuid finds a VirtualNode by its Uuid.
func (m *VirtualNodesManager) ByUuid(uuid string) (*tree.Node, bool) {
for _, n := range m.VirtualNodes {
if n.Uuid == uuid {
return n, true
}
}
return nil, false
}
// ByPath finds a VirtualNode by its Path.
func (m *VirtualNodesManager) ByPath(path string) (*tree.Node, bool) {
for _, n := range m.VirtualNodes {
if strings.Trim(n.Path, "/") == strings.Trim(path, "/") {
return n, true
}
}
return nil, false
}
// ListNodes simply returns the internally cached list.
func (m *VirtualNodesManager) ListNodes() []*tree.Node {
return m.VirtualNodes
}
// ResolveInContext computes the actual node Path based on the resolution metadata of the virtual node
// and the current metadata contained in context.
func (m *VirtualNodesManager) ResolveInContext(ctx context.Context, vNode *tree.Node, clientsPool *ClientsPool, create bool) (*tree.Node, error) {
// log.Logger(ctx).Error("RESOLVE IN CONTEXT - CONTEXT IS", zap.Any("ctx", ctx))
resolved := &tree.Node{}
userName, _ := permissions.FindUserNameInContext(ctx) // We may use Claims returned to grab role or user groupPath
if userName == "" {
log.Logger(ctx).Error("No UserName found in context, cannot resolve virtual node", zap.Any("ctx", ctx))
return nil, errors.New(VIEWS_LIBRARY_NAME, "No Claims found in context", 500)
}
resolutionString := vNode.MetaStore["resolution"]
if cType, exists := vNode.MetaStore["contentType"]; exists && cType == "text/javascript" {
datasourceKeys := map[string]string{}
if len(clientsPool.Sources) == 0 {
log.Logger(ctx).Debug("Clientspool.clients is empty! reload datasources now!")
clientsPool.listDatasources()
}
for key, _ := range clientsPool.Sources {
datasourceKeys[key] = key
}
in := map[string]interface{}{
"User": &permissions.JsUser{Name: userName},
"DataSources": datasourceKeys,
}
out := map[string]interface{}{
"Path": "",
}
if e := permissions.RunJavaScript(ctx, resolutionString, in, out); e == nil {
resolved.Path = out["Path"].(string)
//log.Logger(ctx).Debug("Javascript Resolved Objects", zap.Any("in", in), zap.Any("out", out))
} else {
log.Logger(ctx).Error("Cannot Run Javascript "+resolutionString, zap.Error(e), zap.Any("in", in), zap.Any("out", out))
return nil, e
}
} else {
resolved.Path = strings.Replace(resolutionString, "{USERNAME}", userName, -1)
}
resolved.Type = vNode.Type
parts := strings.Split(resolved.Path, "/")
resolved.SetMeta(common.META_NAMESPACE_DATASOURCE_NAME, parts[0])
resolved.SetMeta(common.META_NAMESPACE_DATASOURCE_PATH, strings.Join(parts[1:], "/"))
if readResp, e := clientsPool.GetTreeClient().ReadNode(ctx, &tree.ReadNodeRequest{Node: resolved}); e == nil {
return readResp.Node, nil
}
if create {
if createResp, err := clientsPool.GetTreeClientWrite().CreateNode(ctx, &tree.CreateNodeRequest{Node: resolved}); err != nil {
return nil, err
} else {
if e := m.copyRecycleRootAcl(ctx, vNode, createResp.Node); e != nil {
return nil, e
}
return createResp.Node, nil
}
}
return resolved, nil
}
func (m *VirtualNodesManager) copyRecycleRootAcl(ctx context.Context, vNode *tree.Node, resolved *tree.Node) error {
cl := idm.NewACLServiceClient(common.SERVICE_GRPC_NAMESPACE_+common.SERVICE_ACL, defaults.NewClient())
// Check if vNode has this flag set
q, _ := ptypes.MarshalAny(&idm.ACLSingleQuery{
NodeIDs: []string{vNode.Uuid},
Actions: []*idm.ACLAction{permissions.ACL_RECYCLE_ROOT},
})
st, e := cl.SearchACL(ctx, &idm.SearchACLRequest{Query: &service.Query{SubQueries: []*any.Any{q}}})
if e != nil {
return e
}
defer st.Close()
var has bool
for {
r, e := st.Recv()
if e != nil {
break
}
if r != nil {
has = true
break
}
}
if !has {
return nil
}
cl.CreateACL(ctx, &idm.CreateACLRequest{
ACL: &idm.ACL{
NodeID: resolved.Uuid,
Action: permissions.ACL_RECYCLE_ROOT,
},
})
return nil
}