add cloud function source to git

function.go

@@ -0,0 +1,43 @@
+
+import (
+	"encoding/json"
+	"log"
+	"net/http"
+)
+
+type reply struct {
+	Response_type string `json:"response_type"`
+	Text          string `json:"text"`
+}
+
+// HelloWorld prints the JSON encoded "message" field in the body
+// of the request or "Hello, World!" if there isn't one.
+func Coffee(writer http.ResponseWriter, request *http.Request) {
+	var data struct {
+		Message      string `json:"message"`
+		Channel_id   string `json:"channel_id"`
+		Channel_name string `json:"channel_name"`
+		Team_domain  string `json:"team_domain"`
+		Team_id      string `json:"team_id"`
+		Post_id      string `json:"post_id"`
+		Text         string `json:"text"`
+		Timestamp    int64  `json:"timestamp"`
+		Token        string `json:"token"`
+		Trigger_word string `json:"trigger_word"`
+		User_id      string `json:"user_id"`
+		User_name    string `json:"user_name"`
+	}
+
+	err := json.NewDecoder(request.Body).Decode(&data)
+	if err != nil {
+		log.Printf("json.NewDecoder: %v\n", err)
+		http.Error(writer, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
+		return
+	}
+
+	log.Printf("%+v", data.User_id)
+	if data.Token == "moha5q8xqjg9prbq7q73676z9y" || data.Token == "33szr8spqi8tx81ymdsxpq5mjh" {
+		json.NewEncoder(writer).Encode(&reply{Response_type: "comment", Text: "@omorud @ksarband @psvihra"})
+	}
+}
+

go.mod

@@ -0,0 +1 @@
+module example.com/cloudfunction