55 lines
932 B
Go
55 lines
932 B
Go
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package cnf
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import (
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"encoding/json"
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"io"
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"strings"
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)
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type Json struct {
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data interface{}
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parsed bool
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}
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// Parse extract a reader as its JSON representation
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func (d *Json) Parse(_reader io.Reader) error {
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// 1. get json decoder
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decoder := json.NewDecoder(_reader)
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err := decoder.Decode(&d.data)
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if err != nil {
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return err
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}
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d.parsed = true
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return nil
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}
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// Get returns the value of a dot-separated path, and if it exists
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func (d *Json) Get(_path string) (string, bool) {
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// 1. extract path
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path := strings.Split(_path, ".")
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// 2. Iterate over path / nested fields
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current := d.data
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for _, field := range path {
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fmap, ok := current.(map[string]interface{})
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if !ok { // incomplete path
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return "", false
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}
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child, ok := fmap[field]
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if !ok { // incomplete path
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return "", false
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}
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current = child
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}
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// 3. Only return if string value
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value, ok := current.(string)
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return value, ok
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}
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