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|
package json
import (
"fmt"
"strconv"
"strings"
"go.neonxp.dev/json/internal/lexer"
)
func (j *JSON) parse(ch chan lexer.Lexem) (Node, error) {
prefix := <-ch
return j.createChild(nil, prefix, ch)
}
func (j *JSON) createChild(parent Node, l lexer.Lexem, ch chan lexer.Lexem) (Node, error) {
switch l.Type {
case lexer.LString:
c, err := j.Factory.Produce(StringType)
if err != nil {
return nil, err
}
if c, ok := c.(AcceptParent); ok {
c.SetParent(parent)
}
child := c.(StringNode)
j.Factory.Fill(child, strings.Trim(l.Value, `"`))
return child, nil
case lexer.LNumber:
num, err := strconv.ParseFloat(l.Value, 64)
if err != nil {
return nil, err
}
c, err := j.Factory.Produce(NumberType)
if err != nil {
return nil, err
}
if c, ok := c.(AcceptParent); ok {
c.SetParent(parent)
}
child := c.(NumberNode)
j.Factory.Fill(child, num)
return child, nil
case lexer.LBoolean:
b := strings.ToLower(l.Value) == "true"
c, err := j.Factory.Produce(BooleanType)
if err != nil {
return nil, err
}
if c, ok := c.(AcceptParent); ok {
c.SetParent(parent)
}
child := c.(BooleanNode)
j.Factory.Fill(child, b)
return child, nil
case lexer.LObjectStart:
child, err := j.parseObject(parent, ch)
if err != nil {
return nil, err
}
return child, nil
case lexer.LArrayStart:
child, err := j.parseArray(parent, ch)
if err != nil {
return nil, err
}
return child, nil
case lexer.LNull:
c, err := j.Factory.Produce(NullType)
if err != nil {
return nil, err
}
if c, ok := c.(AcceptParent); ok {
c.SetParent(parent)
}
return c.(NullNode), nil
default:
return nil, fmt.Errorf("ivalid token: '%s' type=%s", l.Value, l.Type.String())
}
}
func (j *JSON) parseObject(parent Node, ch chan lexer.Lexem) (ObjectNode, error) {
c, err := j.Factory.Produce(ObjectType)
if err != nil {
return nil, err
}
if c, ok := c.(AcceptParent); ok {
c.SetParent(parent)
}
n := c.(ObjectNode)
nextKey := ""
for l := range ch {
switch l.Type {
case lexer.LObjectKey:
nextKey = strings.Trim(l.Value, `"`)
case lexer.LObjectEnd:
return n, nil
case lexer.LObjectValue:
continue
default:
child, err := j.createChild(n, l, ch)
if err != nil {
return nil, err
}
n.Set(nextKey, child)
}
}
return nil, fmt.Errorf("unexpected end of object")
}
func (j *JSON) parseArray(parent Node, ch chan lexer.Lexem) (ArrayNode, error) {
c, err := j.Factory.Produce(ArrayType)
if err != nil {
return nil, err
}
if c, ok := c.(AcceptParent); ok {
c.SetParent(parent)
}
n := c.(ArrayNode)
for l := range ch {
switch l.Type {
case lexer.LArrayEnd:
return n, nil
default:
child, err := j.createChild(n, l, ch)
if err != nil {
return nil, err
}
n.Append(child)
}
}
return nil, fmt.Errorf("unexpected end of object")
}
|
