gno.land/p/onbloc/json/v0⧉

1package json23import (4	"bytes"5	"errors"6	"strconv"78	"gno.land/p/nt/ufmt/v0"9)1011// Marshal returns the JSON encoding of a Node.12func Marshal(node *Node) ([]byte, error) {13	var (14		buf  bytes.Buffer15		sVal string16		bVal bool17		nVal float6418		oVal []byte19		err  error20	)2122	if node == nil {23		return nil, errors.New("node is nil")24	}2526	if !node.modified && !node.ready() {27		return nil, errors.New("node is not ready")28	}2930	if !node.modified && node.ready() {31		buf.Write(node.source())32	}3334	if node.modified {35		switch node.nodeType {36		case Null:37			buf.Write(nullLiteral)3839		case Number:40			nVal, err = node.GetNumeric()41			if err != nil {42				return nil, err43			}4445			num := strconv.FormatFloat(nVal, 'f', -1, 64)46			buf.WriteString(num)4748		case String:49			sVal, err = node.GetString()50			if err != nil {51				return nil, err52			}5354			quoted := ufmt.Sprintf("%s", strconv.Quote(sVal))55			buf.WriteString(quoted)5657		case Boolean:58			bVal, err = node.GetBool()59			if err != nil {60				return nil, err61			}6263			bStr := ufmt.Sprintf("%t", bVal)64			buf.WriteString(bStr)6566		case Array:67			buf.WriteByte(bracketOpen)6869			for i := 0; i < len(node.next); i++ {70				if i != 0 {71					buf.WriteByte(comma)72				}7374				elem, ok := node.next[strconv.Itoa(i)]75				if !ok {76					return nil, ufmt.Errorf("array element %d is not found", i)77				}7879				oVal, err = Marshal(elem)80				if err != nil {81					return nil, err82				}8384				buf.Write(oVal)85			}8687			buf.WriteByte(bracketClose)8889		case Object:90			buf.WriteByte(curlyOpen)9192			bVal = false93			for k, v := range node.next {94				if bVal {95					buf.WriteByte(comma)96				} else {97					bVal = true98				}99100				key := ufmt.Sprintf("%s", strconv.Quote(k))101				buf.WriteString(key)102				buf.WriteByte(colon)103104				oVal, err = Marshal(v)105				if err != nil {106					return nil, err107				}108109				buf.Write(oVal)110			}111112			buf.WriteByte(curlyClose)113		}114	}115116	return buf.Bytes(), nil117}118