79 lines
1.5 KiB
Go
79 lines
1.5 KiB
Go
package internal
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import (
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"fmt"
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"sort"
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"strings"
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)
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// DecodeToNode Converts the labels to a node.
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// labels -> nodes
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func DecodeToNode(labels map[string]string, filters ...string) (*Node, error) {
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var sortedKeys []string
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for key := range labels {
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if len(filters) == 0 {
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sortedKeys = append(sortedKeys, key)
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continue
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}
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for _, filter := range filters {
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if len(key) >= len(filter) && strings.EqualFold(key[:len(filter)], filter) {
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sortedKeys = append(sortedKeys, key)
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continue
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}
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}
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}
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sort.Strings(sortedKeys)
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labelRoot := "traefik"
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var node *Node
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for i, key := range sortedKeys {
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split := strings.Split(key, ".")
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if split[0] != labelRoot {
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// TODO (@ldez): error or continue
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return nil, fmt.Errorf("invalid label root %s", split[0])
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}
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labelRoot = split[0]
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if i == 0 {
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node = &Node{}
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}
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decodeToNode(node, split, labels[key])
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}
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return node, nil
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}
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func decodeToNode(root *Node, path []string, value string) {
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if len(root.Name) == 0 {
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root.Name = path[0]
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}
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// it's a leaf or not -> children
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if len(path) > 1 {
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if n := containsNode(root.Children, path[1]); n != nil {
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// the child already exists
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decodeToNode(n, path[1:], value)
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} else {
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// new child
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child := &Node{Name: path[1]}
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decodeToNode(child, path[1:], value)
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root.Children = append(root.Children, child)
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}
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} else {
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root.Value = value
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}
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}
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func containsNode(nodes []*Node, name string) *Node {
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for _, n := range nodes {
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if name == n.Name {
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return n
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}
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}
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return nil
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}
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