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107 lines
2.0 KiB
Go
107 lines
2.0 KiB
Go
package binary
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import (
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"fmt"
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pb "github.com/Rhymen/go-whatsapp/binary/proto"
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"github.com/golang/protobuf/proto"
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)
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type Node struct {
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Description string
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Attributes map[string]string
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Content interface{}
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}
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func Marshal(n Node) ([]byte, error) {
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if n.Attributes != nil && n.Content != nil {
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a, err := marshalMessageArray(n.Content.([]interface{}))
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if err != nil {
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return nil, err
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}
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n.Content = a
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}
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w := NewEncoder()
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if err := w.WriteNode(n); err != nil {
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return nil, err
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}
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return w.GetData(), nil
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}
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func marshalMessageArray(messages []interface{}) ([]Node, error) {
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ret := make([]Node, len(messages))
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for i, m := range messages {
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if wmi, ok := m.(*pb.WebMessageInfo); ok {
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b, err := marshalWebMessageInfo(wmi)
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if err != nil {
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return nil, nil
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}
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ret[i] = Node{"message", nil, b}
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} else {
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ret[i], ok = m.(Node)
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if !ok {
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return nil, fmt.Errorf("invalid Node")
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}
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}
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}
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return ret, nil
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}
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func marshalWebMessageInfo(p *pb.WebMessageInfo) ([]byte, error) {
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b, err := proto.Marshal(p)
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if err != nil {
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return nil, err
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}
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return b, nil
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}
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func Unmarshal(data []byte) (*Node, error) {
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r := NewDecoder(data)
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n, err := r.ReadNode()
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if err != nil {
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return nil, err
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}
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if n != nil && n.Attributes != nil && n.Content != nil {
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nContent, ok := n.Content.([]Node)
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if ok {
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n.Content, err = unmarshalMessageArray(nContent)
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if err != nil {
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return nil, err
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}
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}
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}
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return n, nil
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}
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func unmarshalMessageArray(messages []Node) ([]interface{}, error) {
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ret := make([]interface{}, len(messages))
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for i, msg := range messages {
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if msg.Description == "message" {
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info, err := unmarshalWebMessageInfo(msg.Content.([]byte))
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if err != nil {
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return nil, err
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}
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ret[i] = info
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} else {
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ret[i] = msg
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}
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}
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return ret, nil
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}
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func unmarshalWebMessageInfo(msg []byte) (*pb.WebMessageInfo, error) {
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message := &pb.WebMessageInfo{}
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err := proto.Unmarshal(msg, message)
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if err != nil {
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return nil, err
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}
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return message, nil
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}
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