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handler-path-datasource.go
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/
handler-path-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 path
import (
"context"
"path"
"strings"
"go.uber.org/zap"
"github.com/pydio/cells/v4/common"
"github.com/pydio/cells/v4/common/log"
"github.com/pydio/cells/v4/common/nodes"
"github.com/pydio/cells/v4/common/nodes/abstract"
"github.com/pydio/cells/v4/common/proto/tree"
)
func WithDatasource() nodes.Option {
return func(options *nodes.RouterOptions) {
options.Wrappers = append(options.Wrappers, newDataSourceHandler())
}
}
func newDataSourceHandler() *DataSourceHandler {
bt := &DataSourceHandler{}
bt.InputMethod = bt.updateInputBranch
bt.OutputMethod = bt.updateOutputNode
return bt
}
// DataSourceHandler is an BranchFilter adding/extracting datasource name from the path.
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
}
out := node.Clone()
if branchInfo.Workspace.UUID == "ROOT" {
if len(strings.Trim(node.Path, "/")) > 0 {
// Get Data Source from first segment, leave tree path unchanged
parts := strings.Split(strings.Trim(node.Path, "/"), "/")
dsName := parts[0]
source, e := v.ClientsPool.GetDataSourceInfo(dsName)
if e != nil {
return ctx, node, e
}
log.Logger(ctx).Debug("updateInput", zap.Any("source", source))
if len(parts) > 1 {
dsPath := strings.Join(parts[1:], "/")
out.MustSetMeta(common.MetaNamespaceDatasourcePath, dsPath)
}
if source.ObjectsBucket == "" {
parts := strings.Split(strings.Trim(node.Path, "/"), "/")
if len(parts) >= 2 {
// Read bucket name from second segment
source = nodes.WithBucketName(source, parts[1])
// Remove from datasource_path
out.MustSetMeta(common.MetaNamespaceDatasourcePath, strings.Join(parts[2:], "/"))
}
}
branchInfo.LoadedSource = source
if source.IsInternal() && node.Uuid == "" {
out.Uuid = path.Base(out.Path)
}
ctx = nodes.WithBranchInfo(ctx, identifier, branchInfo)
}
} else if branchInfo.Root != nil {
wsRoot := branchInfo.Root
dsName := wsRoot.GetStringMeta(common.MetaNamespaceDatasourceName)
source, err := v.ClientsPool.GetDataSourceInfo(dsName)
if err != nil {
log.Logger(ctx).Error("Cannot find DataSourceInfo for "+dsName, zap.Error(err))
return nil, out, err
}
if source.ObjectsBucket == "" {
parts := strings.Split(strings.Trim(node.Path, "/"), "/")
if len(parts) >= 2 {
// Read bucket name from second segment
source = nodes.WithBucketName(source, parts[1])
// Remove from datasource_path
out.MustSetMeta(common.MetaNamespaceDatasourcePath, strings.Join(parts[2:], "/"))
}
}
branchInfo.LoadedSource = source
ctx = nodes.WithBranchInfo(ctx, identifier, branchInfo)
} else {
return ctx, node, nodes.ErrBranchInfoRootMissing(identifier)
}
return ctx, out, nil
}
func (v *DataSourceHandler) updateOutputNode(ctx context.Context, node *tree.Node, identifier string) (context.Context, *tree.Node, error) {
// Reload DS info - may be necessary for outputFiltering case
if branchInfo, ok := nodes.GetBranchInfo(ctx, identifier); (!ok || branchInfo.DataSource == nil) && node.GetStringMeta(common.MetaNamespaceDatasourceName) != "" {
dsName := node.GetStringMeta(common.MetaNamespaceDatasourceName)
if source, err := v.ClientsPool.GetDataSourceInfo(dsName); err == nil {
branchInfo.LoadedSource = source
ctx = nodes.WithBranchInfo(ctx, identifier, branchInfo)
}
}
if branchInfo, ok := nodes.GetBranchInfo(ctx, identifier); ok && branchInfo.DataSource != nil && branchInfo.LoadedSource.ObjectsBucket == "" {
sLen := len(strings.Split(strings.Trim(node.Path, "/"), "/"))
if sLen == 1 {
// The root of the datasource is at the bucket level, set flag readonly
n := node.Clone()
n.MustSetMeta(common.MetaFlagLevelReadonly, "true")
return ctx, n, nil
} else if sLen == 2 {
// Set a specific flag that can adapt the display
n := node.Clone()
n.MustSetMeta(common.MetaFlagBucket, "true")
return ctx, n, nil
}
}
return ctx, node, nil
}