/
response.go
125 lines (98 loc) · 2.56 KB
/
response.go
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/*
* Copyright (c) 2023, LinstoHu
* All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package marketws
import (
"encoding/json"
"errors"
"github.com/valyala/fastjson"
)
type Request struct {
ID string `json:"id,omitempty"`
Sub string `json:"sub,omitempty"`
UnSub string `json:"unsub,omitempty"`
}
// AnyMessage represents either a JSON Response or SubscribedMessage.
type AnyMessage struct {
Ping *PingMessage
Response *Response
SubscribedMessage *SubscribedMessage
}
type PingMessage struct {
Ping int64 `json:"ping,omitempty"`
}
type PongMessage struct {
Pong int64 `json:"pong,omitempty"`
}
type Response struct {
ID string `json:"id,omitempty"`
Status string `json:"status,omitempty"`
Subbed string `json:"subbed,omitempty"`
Ts int64 `json:"ts,omitempty"`
}
type SubscribedMessage struct {
Channel string `json:"ch,omitempty"`
Ts int64 `json:"ts,omitempty"`
Data json.RawMessage `json:"tick"`
}
func (m AnyMessage) MarshalJSON() ([]byte, error) {
var v any
switch {
case m.Response != nil && m.SubscribedMessage == nil:
v = m.Response
case m.Response == nil && m.SubscribedMessage != nil:
v = m.SubscribedMessage
}
if v != nil {
return json.Marshal(v)
}
return nil, errors.New("message must have exactly one of the Response or SubscribedMessage fields set")
}
func (m *AnyMessage) UnmarshalJSON(data []byte) error {
var p fastjson.Parser
v, err := p.ParseBytes(data)
if err != nil {
return err
}
if v.Exists("ping") {
var resp PingMessage
if err := json.Unmarshal(data, &resp); err != nil {
return err
}
m.Ping = &resp
return nil
}
if v.Exists("id") {
var resp Response
if err := json.Unmarshal(data, &resp); err != nil {
return err
}
m.Response = &resp
return nil
}
if v.Exists("ch") {
msg := &SubscribedMessage{
Channel: string(v.GetStringBytes("ch")),
Ts: v.GetInt64("ts"),
}
if v.Get("tick") != nil {
msg.Data = v.Get("tick").MarshalTo(nil)
}
m.SubscribedMessage = msg
return nil
}
return nil
}