feat: add api endpoint to fecth filename of backup (#273)

Author: tanmoysrt

docs/rest_api.md

@@ -89,6 +89,20 @@ For other part, we are using the GraphQL API. Check the [GraphQL API Documentati
 
 ---
 
+### Backup Filename API
+
+**GET** /persistent-volume/backup/:id/filename
+
+**Example Response**
+
+**200 OK**
+- Filename will be sent as response text
+
+**Any other status code**
+- The filename will be failed to send
+
+---
+
 ### Upload File for Restore API
 **POST** /persistent-volume/restore/<restore_id>/upload
 

swiftwave_service/rest/persistent_volume.go

@@ -81,6 +81,23 @@ func (server *Server) downloadPersistentVolumeBackup(c echo.Context) error {
 	}
 }
 
+// GET /persistent-volume/backup/:id/filename
+func (server *Server) getPersistentVolumeBackupFileName(c echo.Context) error {
+	idStr := c.Param("id")
+	// convert id to uint
+	id, err := strconv.Atoi(idStr)
+	if err != nil {
+		return c.String(400, "Invalid id")
+	}
+	// fetch persistent volume backup
+	var persistentVolumeBackup core.PersistentVolumeBackup
+	err = persistentVolumeBackup.FindById(c.Request().Context(), server.ServiceManager.DbClient, uint(id))
+	if err != nil {
+		return c.String(500, "Internal server error")
+	}
+	return c.String(200, persistentVolumeBackup.File)
+}
+
 // POST /persistent-volume/restore/:id/upload
 func (server *Server) uploadPersistentVolumeRestoreFile(c echo.Context) error {
 	file, err := c.FormFile("file")

swiftwave_service/rest/server.go

@@ -20,6 +20,7 @@ func (server *Server) initiateProjectRoutes(e *echo.Echo) {
 	e.POST("/upload/code", server.uploadTarFile)
 	// Initiating Routes for PersistentVolume
 	e.GET("/persistent-volume/backup/:id/download", server.downloadPersistentVolumeBackup)
+	e.GET("/persistent-volume/backup/:id/filename", server.getPersistentVolumeBackupFileName)
 	e.POST("/persistent-volume/restore/:id/upload", server.uploadPersistentVolumeRestoreFile)
 	// Initiating Routes for Webhook
 	e.Any("/webhook/redeploy-app/:app-id/:webhook-token", server.redeployApp)