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package model
import (
"fmt"
"strconv"
)
// Query returns node by array query
func Query(n Node, query []string) (Node, error) {
if len(query) == 0 {
return n, nil
}
head, rest := query[0], query[1:]
switch n := n.(type) {
case *ArrayNode:
idx, err := strconv.Atoi(head)
if err != nil {
return nil, fmt.Errorf("index must be a number, got %s", head)
}
next, err := n.Index(idx)
if err != nil {
return nil, err
}
return Query(next, rest)
case *ObjectNode:
next, err := n.Get(head)
if err != nil {
return nil, err
}
return Query(next, rest)
}
return nil, fmt.Errorf("can't get %s from node type %s", head, n.Type())
}
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