Add endpoint support for read receipts.

src/api/api.go

@@ -91,6 +91,12 @@ type Reaction struct {
 	Timestamp    int64  `json:"timestamp"`
 }
 
+type Receipt struct {
+	Recipient   string `json:"recipient"`
+	ReceiptType string `json:"receipt_type" enums:"read,viewed"`
+	Timestamp   int64  `json:"timestamp"`
+}
+
 type SendMessageV1 struct {
 	Number           string   `json:"number"`
 	Recipients       []string `json:"recipients"`
@@ -1472,6 +1478,51 @@ func (a *Api) RemoveReaction(c *gin.Context) {
 	c.Status(http.StatusNoContent)
 }
 
+
+// @Summary Send a receipt.
+// @Tags Receipts
+// @Description Send a read or viewed receipt
+// @Accept  json
+// @Produce  json
+// @Success 204 {string} OK
+// @Failure 400 {object} Error
+// @Param data body Receipt true "Receipt"
+// @Router /v1/receipts/{number} [post]
+func (a *Api) SendReceipt(c *gin.Context) {
+	var req Receipt
+	err := c.BindJSON(&req)
+	if err != nil {
+		c.JSON(400, Error{Msg: "Couldn't process request - invalid request"})
+		log.Error(err.Error())
+		return
+	}
+
+	number := c.Param("number")
+
+	if req.Recipient == "" {
+		c.JSON(400, Error{Msg: "Couldn't process request - recipient missing"})
+		return
+	}
+
+	// if req.ReceiptType != "viewed" && req.ReceiptType != "read" {
+	if !utils.StringInSlice(req.ReceiptType, []string{"read", "viewed"}) {
+		c.JSON(400, Error{Msg: "Couldn't process request - receipt type must be read or viewed"})
+		return
+	}
+
+	if req.Timestamp == 0 {
+		c.JSON(400, Error{Msg: "Couldn't process request - timestamp missing"})
+		return
+	}
+
+	err = a.signalClient.SendReceipt(number, req.Recipient, req.ReceiptType, req.Timestamp)
+	if err != nil {
+		c.JSON(400, Error{Msg: err.Error()})
+		return
+	}
+	c.Status(http.StatusNoContent)
+}
+
 // @Summary Show Typing Indicator.
 // @Tags Messages
 // @Description Show Typing Indicator.
@@ -1883,7 +1934,7 @@ func (a *Api) ListInstalledStickerPacks(c *gin.Context) {
 
 // @Summary Add Sticker Pack.
 // @Tags Sticker Packs
-// @Description In order to add a sticker pack, browse to https://signalstickers.org/ and select the sticker pack you want to add. Then, press the "Add to Signal" button. If you look at the address bar in your browser you should see an URL in this format: https://signal.art/addstickers/#pack_id=XXX&pack_key=YYY, where XXX is the pack_id and YYY is the pack_key. 
+// @Description In order to add a sticker pack, browse to https://signalstickers.org/ and select the sticker pack you want to add. Then, press the "Add to Signal" button. If you look at the address bar in your browser you should see an URL in this format: https://signal.art/addstickers/#pack_id=XXX&pack_key=YYY, where XXX is the pack_id and YYY is the pack_key.
 // @Accept  json
 // @Produce  json
 // @Param number path string true "Registered Phone Number"

src/client/client.go

@@ -1637,6 +1637,44 @@ func (s *SignalClient) SendReaction(number string, recipient string, emoji strin
 	return err
 }
 
+
+func (s *SignalClient) SendReceipt(number string, recipient string, receipt_type string, timestamp int64) error {
+	// see https://github.com/AsamK/signal-cli/blob/master/man/signal-cli.1.adoc#sendreceipt
+	var err error
+	recp := recipient
+
+	if s.signalCliMode == JsonRpc {
+		type Request struct {
+			Recipient    string `json:"recipient,omitempty"`
+			ReceiptType  string `json:"receipt-type"`
+			Timestamp    int64  `json:"target-timestamp"`
+		}
+		request := Request{}
+		request.Recipient = recp
+		request.ReceiptType = receipt_type
+		request.Timestamp = timestamp
+
+		jsonRpc2Client, err := s.getJsonRpc2Client()
+		if err != nil {
+			return err
+		}
+		_, err = jsonRpc2Client.getRaw("sendReceipt", &number, request)
+		return err
+	}
+
+	cmd := []string{
+		"--config", s.signalCliConfig,
+		"-a", number,
+		"sendReceipt",
+		recp,
+	}
+
+	cmd = append(cmd, []string{"-t", strconv.FormatInt(timestamp, 10)}...)
+
+	_, err = s.cliClient.Execute(true, cmd, "")
+	return err
+}
+
 func (s *SignalClient) SendStartTyping(number string, recipient string) error {
 	var err error
 	recp := recipient

src/main.go

@@ -49,6 +49,9 @@ import (
 // @tag.name Reactions
 // @tag.description React to messages.
 
+// @tag.name Receipts
+// @tag.description Send receipts for messages.
+
 // @tag.name Search
 // @tag.description Search the Signal Service.
 
@@ -254,6 +257,11 @@ func main() {
 			reactions.DELETE(":number", api.RemoveReaction)
 		}
 
+		receipts := v1.Group("/receipts")
+		{
+			receipts.POST(":number", api.SendReceipt)
+		}
+
 		search := v1.Group("/search")
 		{
 			search.GET("", api.SearchForNumbers)