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meta-node.go
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meta-node.go
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package merger
import (
"path"
"regexp"
"github.com/gobwas/glob"
"github.com/pydio/cells/common/proto/tree"
)
const (
NodeType_METADATA tree.NodeType = 3
MetaNodeParentUUIDMeta = "ParentUUID"
MetaNodeParentPathMeta = "ParentPath"
)
type MetaConfig struct {
MetaNames []string
MetaRegexp []*regexp.Regexp
}
// newMetaNode create a new MetaNode from an existing metadata
func newMetaNode(parentNode *TreeNode, name, value string) *TreeNode {
tN := NewTreeNode(&tree.Node{
Path: path.Join(parentNode.Path, name),
Uuid: parentNode.Uuid + "-" + name,
Type: NodeType_METADATA,
Etag: value,
MetaStore: map[string]string{
MetaNodeParentUUIDMeta: `"` + parentNode.Uuid + `"`, // Json-encode parent Uuid
MetaNodeParentPathMeta: `"` + parentNode.Path + `"`, // Json-encode parent Path
},
})
return tN
}
// addMetadataAsChildNodes extracts MetaNodes from normal node, based on a config
func addMetadataAsChildNodes(n *TreeNode, metaGlobs []glob.Glob) {
if len(metaGlobs) == 0 || n.MetaStore == nil {
return
}
for k, v := range n.MetaStore {
for _, g := range metaGlobs {
if g.Match(k) {
n.AddChild(newMetaNode(n, k, v))
}
}
}
return
}