feat(gateway): added first implement of the Gateway (MQTT, Influx, REST)

Signed-off-by: Klagarge <remi@heredero.ch>

gateway/src/PublishCommand.go

@@ -0,0 +1,59 @@
+package main
+
+import (
+	"errors"
+	_ "gateway-softweng/docs"
+
+	_ "github.com/eclipse/paho.mqtt.golang"
+	"github.com/gin-gonic/gin"
+)
+
+// Command represents the structure of the command to be published
+// @Description Command structure for publishing
+type Command struct {
+	Command string `json:"command" example:"UP" binding:"required"`
+}
+
+// @Summary Publish command
+// @Description Publish a command to a specific device in a room
+// @Tags commands
+// @Accept json
+// @Produce json
+// @Security BasicAuth
+// @Param room query string true "Room name" example(Garage)
+// @Param device query string true "Device name" example(Door)
+// @Param command body main.Command true "Command to publish"
+// @Success 200 {object} map[string]string "status:ok"
+// @Failure 500 {object} gin.H
+// @Router /raclette [post]
+func (gh *Gateway) publishCommand(c *gin.Context) error {
+	// Get the user from the authenticated context
+	user := c.MustGet(gin.AuthUserKey).(string)
+
+	// Get room and device from the query parameters
+	room, ret := c.GetQuery("room")
+	if !ret {
+		return errors.New(`no room found`)
+	}
+	device, ret := c.GetQuery("device")
+	if !ret {
+		return errors.New(`no device found`)
+	}
+
+	// Define the JSON structure for the command
+	var json Command
+
+	// Bind the JSON payload to the structure
+	err := c.Bind(&json)
+	if err != nil {
+		return err
+	}
+
+	// Publish the command to the MQTT broker
+	topic := user + "/" + room + "/" + device + "/command/" + json.Command
+	token := gh.mqtt.Publish(topic, 1, false, "")
+	if token.Wait() && token.Error() != nil {
+		return token.Error()
+	}
+	return nil
+}