func getValue()

in pkg/client/elasticsearch/query.go [234:259]

• 23 lines of code
• 6 McCabe index (conditional complexity)

func getValue(path string, doc map[string]interface{}) (interface{}, error) {
	segments := strings.Split(path, ".")
	if !(len(segments) > 0) {
		return 0, fmt.Errorf("no segment in path")
	}
	isLeaf := len(segments) == 1

	root, segments := segments[0], segments[1:]
	rootDoc, exists := doc[root]
	if !exists {
		keys := make([]string, 0, len(doc))
		for k := range doc {
			keys = append(keys, k)
		}
		return 0, fmt.Errorf("can't find leaf %s in [%s]", root, strings.Join(keys, ","))
	}

	if isLeaf {
		// Value is expected
		return rootDoc, nil
	}
	if innerDoc, ok := rootDoc.(map[string]interface{}); ok {
		return getValue(strings.Join(segments, "."), innerDoc)
	}
	return 0, fmt.Errorf("not a document: %v", rootDoc)
}