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handler-uuid-datasource.go
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handler-uuid-datasource.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 uuid
import (
"context"
"github.com/pydio/cells/v4/common/nodes/abstract"
"github.com/pydio/cells/v4/common"
"github.com/pydio/cells/v4/common/nodes"
"github.com/pydio/cells/v4/common/proto/tree"
)
func WithDatasource() nodes.Option {
return func(options *nodes.RouterOptions) {
options.Wrappers = append(options.Wrappers, NewUuidDataSourceHandler())
}
}
func NewUuidDataSourceHandler() *DataSourceHandler {
bt := &DataSourceHandler{}
bt.InputMethod = bt.updateInputBranch
bt.OutputMethod = bt.updateOutputNode
return bt
}
// DataSourceHandler is an BranchFilter extracting datasource info based on node UUID.
type DataSourceHandler struct {
abstract.BranchFilter
}
func (v *DataSourceHandler) Adapt(c nodes.Handler, options nodes.RouterOptions) nodes.Handler {
v.AdaptOptions(c, options)
return v
}
func (v *DataSourceHandler) updateInputBranch(ctx context.Context, node *tree.Node, identifier string) (context.Context, *tree.Node, error) {
branchInfo, ok := nodes.GetBranchInfo(ctx, identifier)
if !ok {
return ctx, node, nodes.ErrBranchInfoMissing(identifier)
}
if branchInfo.Client != nil {
// DS is already set by a previous middleware, ignore.
return ctx, node, nil
}
dsName := node.GetStringMeta(common.MetaNamespaceDatasourceName)
dsPath := node.GetStringMeta(common.MetaNamespaceDatasourcePath)
if len(dsPath) == 0 || len(dsName) == 0 {
// Ignore this step
return ctx, node, nil
}
source, e := v.ClientsPool.GetDataSourceInfo(dsName)
if e != nil {
return ctx, node, e
}
branchInfo.LoadedSource = source
ctx = nodes.WithBranchInfo(ctx, identifier, branchInfo)
return ctx, node, nil
}
func (v *DataSourceHandler) updateOutputNode(ctx context.Context, node *tree.Node, identifier string) (context.Context, *tree.Node, error) {
return ctx, node, nil
}