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handler-virtual-resolver.go
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/
handler-virtual-resolver.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 virtual
import (
"context"
"github.com/pydio/cells/v4/common/nodes"
"github.com/pydio/cells/v4/common/nodes/abstract"
"github.com/pydio/cells/v4/common/nodes/acl"
"github.com/pydio/cells/v4/common/proto/tree"
)
func WithResolver() nodes.Option {
return func(options *nodes.RouterOptions) {
if !options.BrowseVirtualNodes && !options.AdminView {
options.Wrappers = append(options.Wrappers, NewVirtualNodesHandler())
}
}
}
// ResolverHandler dynamically resolves virtual nodes to their runtime value.
type ResolverHandler struct {
abstract.BranchFilter
}
func (v *ResolverHandler) Adapt(c nodes.Handler, options nodes.RouterOptions) nodes.Handler {
v.AdaptOptions(c, options)
return v
}
func NewVirtualNodesHandler() *ResolverHandler {
v := &ResolverHandler{}
v.InputMethod = v.updateInput
v.OutputMethod = func(ctx context.Context, node *tree.Node, identifier string) (context.Context, *tree.Node, error) {
return ctx, node, nil
}
return v
}
// updateInput Updates BranchInfo and AccessList in context with resolved values for virtual nodes
func (v *ResolverHandler) updateInput(ctx context.Context, node *tree.Node, identifier string) (context.Context, *tree.Node, error) {
virtualManager := abstract.GetVirtualNodesManager(v.RuntimeCtx)
if branchInfo, ok := nodes.GetBranchInfo(ctx, identifier); ok && !branchInfo.Binary && branchInfo.Root != nil {
originalUuid := branchInfo.Root.Uuid
if virtual, exists := virtualManager.ByUuid(branchInfo.Root.Uuid); exists {
resolvedRoot, e := virtualManager.ResolveInContext(ctx, virtual, true)
if e != nil {
return ctx, node, e
}
branchInfo.Root = resolvedRoot
ctx = nodes.WithBranchInfo(ctx, identifier, branchInfo)
if accessList, ok := acl.FromContext(ctx); ok {
if copied := accessList.ReplicateBitmask(originalUuid, resolvedRoot.Uuid); copied {
ctx = acl.ToContext(ctx, accessList)
}
}
}
}
return ctx, node, nil
}