added JoinGroupByInviteLink feature

src/api/api.go

@@ -1334,6 +1334,33 @@ func (a *Api) JoinGroup(c *gin.Context) {
 	c.Status(http.StatusNoContent)
 }
 
+// @Summary Join a Signal Group by invite link.
+// @Tags Groups
+// @Description Join the specified Signal Group by invite link.
+// @Accept  json
+// @Produce  json
+// @Success 204 {string} OK
+// @Failure 400 {object} Error
+// @Param number path string true "Registered Phone Number"
+// @Query invite_link query string true "Invite Link"
+// @Router /v1/groups/{number}/join_by_invite_link [post]
+func (a *Api) JoinGroupByInviteLink(c *gin.Context) {
+	number := c.Param("number")
+	if number == "" {
+		c.JSON(400, Error{Msg: "Couldn't process request - number missing"})
+		return
+	}
+
+	inviteLink := c.Query("invite_link")
+	err := a.signalClient.JoinGroupByInviteLink(number, inviteLink)
+	if err != nil {
+		c.JSON(400, Error{Msg: err.Error()})
+		return
+	}
+
+	c.Status(http.StatusNoContent)
+}
+
 // @Summary Quit a Signal Group.
 // @Tags Groups
 // @Description Quit the specified Signal Group.

src/client/client.go

@@ -5,13 +5,14 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	log "github.com/sirupsen/logrus"
 	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strconv"
 	"strings"
 
+	log "github.com/sirupsen/logrus"
+
 	securejoin "github.com/cyphar/filepath-securejoin"
 	"github.com/h2non/filetype"
 
@@ -1549,6 +1550,24 @@ func (s *SignalClient) JoinGroup(number string, groupId string) error {
 	return err
 }
 
+func (s *SignalClient) JoinGroupByInviteLink(number string, inviteLink string) error {
+	var err error
+	if s.signalCliMode == JsonRpc {
+		type Request struct {
+			InviteLink string `json:"uri"`
+		}
+		request := Request{InviteLink: inviteLink}
+		jsonRpc2Client, err := s.getJsonRpc2Client()
+		if err != nil {
+			return err
+		}
+		_, err = jsonRpc2Client.getRaw("joinGroup", &number, request)
+	} else {
+		_, err = s.cliClient.Execute(true, []string{"--config", s.signalCliConfig, "-a", number, "joinGroup", "--uri", inviteLink}, "")
+	}
+	return err
+}
+
 func (s *SignalClient) QuitGroup(number string, groupId string) error {
 	var err error
 	if s.signalCliMode == JsonRpc {

src/main.go

@@ -3,6 +3,11 @@ package main
 import (
 	"encoding/json"
 	"flag"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"strconv"
+
 	"github.com/bbernhard/signal-cli-rest-api/api"
 	"github.com/bbernhard/signal-cli-rest-api/client"
 	docs "github.com/bbernhard/signal-cli-rest-api/docs"
@@ -12,10 +17,6 @@ import (
 	log "github.com/sirupsen/logrus"
 	swaggerFiles "github.com/swaggo/files"
 	ginSwagger "github.com/swaggo/gin-swagger"
-	"io/ioutil"
-	"net/http"
-	"os"
-	"strconv"
 )
 
 // @title Signal Cli REST API
@@ -191,6 +192,7 @@ func main() {
 		{
 			groups.POST(":number", api.CreateGroup)
 			groups.GET(":number", api.GetGroups)
+			groups.POST(":number/join_by_invite_link", api.JoinGroupByInviteLink)
 			groups.GET(":number/:groupid", api.GetGroup)
 			groups.DELETE(":number/:groupid", api.DeleteGroup)
 			groups.POST(":number/:groupid/block", api.BlockGroup)