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forward.go
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forward.go
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package message
import (
"crypto/md5"
"regexp"
"strings"
"sync"
"github.com/rhwong/MiraiGo/binary"
"github.com/rhwong/MiraiGo/client/pb/msg"
"github.com/rhwong/MiraiGo/internal/proto"
"github.com/rhwong/MiraiGo/utils"
)
// *----- Definitions -----* //
// ForwardMessage 合并转发消息
type ForwardMessage struct {
Nodes []*ForwardNode
}
type ForwardNode struct { // todo 加一个group_id
GroupId int64
SenderId int64
SenderName string
Time int32
Message []IMessageElement
}
type ForwardElement struct {
FileName string
Content string
ResId string
Items []*msg.PbMultiMsgItem
}
// *----- Implementations -----* //
func (f *ForwardMessage) Type() ElementType {
return Forward
}
// Type impl IMessageElement
func (e *ForwardElement) Type() ElementType {
return Forward
}
func (e *ForwardElement) Pack() []*msg.Elem {
rich := &msg.Elem{
RichMsg: &msg.RichMsg{
Template1: append([]byte{1}, binary.ZlibCompress(utils.S2B(e.Content))...),
ServiceId: proto.Int32(35),
MsgResId: []byte{},
},
}
txt := &msg.Elem{
Text: &msg.Text{
Str: proto.String("你的QQ暂不支持查看[转发多条消息],请期待后续版本。"),
},
}
return []*msg.Elem{rich, txt}
}
func NewForwardMessage() *ForwardMessage {
return &ForwardMessage{}
}
// AddNode adds a node to the forward message. return for method chaining.
func (f *ForwardMessage) AddNode(node *ForwardNode) *ForwardMessage {
f.Nodes = append(f.Nodes, node)
for _, item := range node.Message {
if item.Type() != Forward { // quick path
continue
}
}
return f
}
// Length return the length of Nodes.
func (f *ForwardMessage) Length() int { return len(f.Nodes) }
func (f *ForwardMessage) Brief() string {
var brief strings.Builder
for _, n := range f.Nodes {
brief.WriteString(ToReadableString(n.Message))
if brief.Len() >= 27 {
break
}
}
return brief.String()
}
func (f *ForwardMessage) Preview() string {
var pv strings.Builder
for i, node := range f.Nodes {
if i >= 4 {
break
}
pv.WriteString(`<title size="26" color="#777777">`)
pv.WriteString(utils.XmlEscape(node.SenderName))
pv.WriteString(": ")
pv.WriteString(utils.XmlEscape(ToReadableString(node.Message)))
pv.WriteString("</title>")
}
return pv.String()
}
func (f *ForwardMessage) CalculateValidationData(seq, random int32, groupCode int64) ([]byte, []byte) {
msgs := f.PackForwardMessage(seq, random, groupCode)
trans := &msg.PbMultiMsgTransmit{Msg: msgs, PbItemList: []*msg.PbMultiMsgItem{
{
FileName: proto.String("MultiMsg"),
Buffer: &msg.PbMultiMsgNew{Msg: msgs},
},
}}
b, _ := proto.Marshal(trans)
data := binary.GZipCompress(b)
hash := md5.Sum(data)
return data, hash[:]
}
func (f *ForwardMessage) PackForwardMessage(seq int32, random int32, groupCode int64) []*msg.Message {
ml := make([]*msg.Message, 0, len(f.Nodes))
for _, node := range f.Nodes {
ml = append(ml, &msg.Message{
Head: &msg.MessageHead{
FromUin: proto.Some(node.SenderId),
MsgSeq: proto.Some(seq),
MsgTime: proto.Some(node.Time),
MsgUid: proto.Int64(0x0100_0000_0000_0000 | (int64(random) & 0xFFFFFFFF)),
MutiltransHead: &msg.MutilTransHead{
MsgId: proto.Int32(1),
},
MsgType: proto.Int32(82),
GroupInfo: &msg.GroupInfo{
GroupCode: proto.Some(groupCode),
GroupRank: []byte{},
GroupName: []byte{},
GroupCard: proto.Some(node.SenderName),
},
},
Body: &msg.MessageBody{
RichText: &msg.RichText{
Elems: ToProtoElems(node.Message, false),
},
},
})
}
return ml
}
type lazyRegex struct {
once sync.Once
reg *regexp.Regexp
Pattern string
}
func (l *lazyRegex) init() {
l.reg = regexp.MustCompile(l.Pattern)
}
func (l *lazyRegex) findMatch1(content string) string {
l.once.Do(l.init)
matches := l.reg.FindStringSubmatch(content)
if matches == nil {
return ""
}
return matches[1]
}
var (
mResID = lazyRegex{Pattern: `m_resid="(.*?)"`}
mFileName = lazyRegex{Pattern: `m_fileName="(.*?)"`}
)
func forwardMsgFromXML(xml string) *ForwardElement {
resid := mResID.findMatch1(xml)
fileName := mFileName.findMatch1(xml)
if resid == "" && fileName == "" {
return nil
}
return &ForwardElement{FileName: fileName, ResId: resid}
}