Use upstream whatsapp again (#809)

vendor/github.com/Rhymen/go-whatsapp/group.go

@@ -0,0 +1,90 @@
+package whatsapp
+
+import (
+	"encoding/json"
+	"fmt"
+	"time"
+)
+
+func (wac *Conn) GetGroupMetaData(jid string) (<-chan string, error) {
+	data := []interface{}{"query", "GroupMetadata", jid}
+	return wac.writeJson(data)
+}
+
+func (wac *Conn) CreateGroup(subject string, participants []string) (<-chan string, error) {
+	return wac.setGroup("create", "", subject, participants)
+}
+
+func (wac *Conn) UpdateGroupSubject(subject string, jid string) (<-chan string, error) {
+	return wac.setGroup("subject", jid, subject, nil)
+}
+
+func (wac *Conn) SetAdmin(jid string, participants []string) (<-chan string, error) {
+	return wac.setGroup("promote", jid, "", participants)
+}
+
+func (wac *Conn) RemoveAdmin(jid string, participants []string) (<-chan string, error) {
+	return wac.setGroup("demote", jid, "", participants)
+}
+
+func (wac *Conn) AddMember(jid string, participants []string) (<-chan string, error) {
+	return wac.setGroup("add", jid, "", participants)
+}
+
+func (wac *Conn) RemoveMember(jid string, participants []string) (<-chan string, error) {
+	return wac.setGroup("remove", jid, "", participants)
+}
+
+func (wac *Conn) LeaveGroup(jid string) (<-chan string, error) {
+	return wac.setGroup("leave", jid, "", nil)
+}
+
+func (wac *Conn) GroupInviteLink(jid string) (string, error) {
+	request := []interface{}{"query", "inviteCode", jid}
+	ch, err := wac.writeJson(request)
+	if err != nil {
+		return "", err
+	}
+
+	var response map[string]interface{}
+
+	select {
+	case r := <-ch:
+		if err := json.Unmarshal([]byte(r), &response); err != nil {
+			return "", fmt.Errorf("error decoding response message: %v\n", err)
+		}
+	case <-time.After(wac.msgTimeout):
+		return "", fmt.Errorf("request timed out")
+	}
+
+	if int(response["status"].(float64)) != 200 {
+		return "", fmt.Errorf("request responded with %d", response["status"])
+	}
+
+	return response["code"].(string), nil
+}
+
+func (wac *Conn) GroupAcceptInviteCode(code string) (jid string, err error) {
+	request := []interface{}{"action", "invite", code}
+	ch, err := wac.writeJson(request)
+	if err != nil {
+		return "", err
+	}
+
+	var response map[string]interface{}
+
+	select {
+	case r := <-ch:
+		if err := json.Unmarshal([]byte(r), &response); err != nil {
+			return "", fmt.Errorf("error decoding response message: %v\n", err)
+		}
+	case <-time.After(wac.msgTimeout):
+		return "", fmt.Errorf("request timed out")
+	}
+
+	if int(response["status"].(float64)) != 200 {
+		return "", fmt.Errorf("request responded with %d", response["status"])
+	}
+
+	return response["gid"].(string), nil
+}