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|
package graphql
import (
"io"
"strconv"
)
var nullLit = []byte(`null`)
var trueLit = []byte(`true`)
var falseLit = []byte(`false`)
var openBrace = []byte(`{`)
var closeBrace = []byte(`}`)
var openBracket = []byte(`[`)
var closeBracket = []byte(`]`)
var colon = []byte(`:`)
var comma = []byte(`,`)
var Null = lit(nullLit)
var True = lit(trueLit)
var False = lit(falseLit)
type Marshaler interface {
MarshalGQL(w io.Writer)
}
type Unmarshaler interface {
UnmarshalGQL(v interface{}) error
}
type OrderedMap struct {
Keys []string
Values []Marshaler
}
type WriterFunc func(writer io.Writer)
func (f WriterFunc) MarshalGQL(w io.Writer) {
f(w)
}
func NewOrderedMap(len int) *OrderedMap {
return &OrderedMap{
Keys: make([]string, len),
Values: make([]Marshaler, len),
}
}
func (m *OrderedMap) Add(key string, value Marshaler) {
m.Keys = append(m.Keys, key)
m.Values = append(m.Values, value)
}
func (m *OrderedMap) MarshalGQL(writer io.Writer) {
writer.Write(openBrace)
for i, key := range m.Keys {
if i != 0 {
writer.Write(comma)
}
io.WriteString(writer, strconv.Quote(key))
writer.Write(colon)
m.Values[i].MarshalGQL(writer)
}
writer.Write(closeBrace)
}
type Array []Marshaler
func (a Array) MarshalGQL(writer io.Writer) {
writer.Write(openBracket)
for i, val := range a {
if i != 0 {
writer.Write(comma)
}
val.MarshalGQL(writer)
}
writer.Write(closeBracket)
}
func lit(b []byte) Marshaler {
return WriterFunc(func(w io.Writer) {
w.Write(b)
})
}
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