backend for download battery log button

csharp/App/Backend/Controller.cs

@@ -11,6 +11,14 @@ namespace InnovEnergy.App.Backend;
 
 using Token = String;
 
+// create JobStatus class to track download battery log job
+public class JobStatus
+{
+    public string JobId { get; set; }
+    public string Status { get; set; }
+    public string FileName { get; set; }
+    public DateTime StartTime { get; set; } 
+}
 
 [Controller]
 [Route("api/")]
@@ -631,6 +639,156 @@ public class Controller : ControllerBase
         return Ok();
     }
     
+    private static Dictionary<string, JobStatus> JobStatuses = new Dictionary<string, JobStatus>();
+
+    [HttpPost("StartDownloadBatteryLog")]
+    public async Task<ActionResult<string>> StartDownloadBatteryLog(long batteryNode, long installationId, Token authToken)
+    {
+        var session = Db.GetSession(authToken);
+        var installationToDownload = Db.GetInstallationById(installationId);
+
+        if (installationToDownload != null)
+        {
+            string jobId = Guid.NewGuid().ToString();
+            _ = Task.Run(async () =>
+            {
+                await session.RunDownloadLogScript(installationToDownload.VpnIp, batteryNode, installationToDownload.Product);
+                string fileName = $"{installationToDownload.VpnIp}-node{batteryNode}-{DateTime.Now:dd-MM-yyyy}.bin";
+                string filePath = $"/home/ubuntu/backend/downloadBatteryLog/{fileName}";
+
+                if (System.IO.File.Exists(filePath))
+                {
+                    SaveJobStatus(jobId, "Completed", fileName:fileName);
+                }
+                else
+                {
+                    SaveJobStatus(jobId, "Failed");
+                }
+            });
+
+            // Store initial job status in in-memory storage
+            SaveJobStatus(jobId, "Processing");
+
+            return Ok(jobId);
+        }
+
+        return NotFound();
+    }
+
+    [HttpGet("DownloadBatteryLog")]
+    public async Task<ActionResult> DownloadBatteryLog(string jobId)
+    
+    {
+        Console.WriteLine("-----------------------------------Start uploading battery log-----------------------------------");
+        var jobStatus = JobStatuses.TryGetValue(jobId, out var status) ? status : null;
+        if (jobStatus == null || jobStatus.Status != "Completed" || string.IsNullOrEmpty(jobStatus.FileName))
+        {
+            return NotFound();
+        }
+
+        string fileName = jobStatus.FileName;
+        string filePath = $"/home/ubuntu/backend/downloadBatteryLog/{fileName}";
+
+        if (!System.IO.File.Exists(filePath))
+        {
+            return NotFound();
+        }
+
+        string contentType = "application/octet-stream";
+        var memory = new MemoryStream();
+        await using (var stream = new FileStream(filePath, FileMode.Open))
+        {
+            await stream.CopyToAsync(memory);
+        }
+        memory.Position = 0;
+
+        var fileContentResult = new FileContentResult(memory.ToArray(), contentType)
+        {
+            //FileDownloadName = Path.GetFileName(filePath)
+            FileDownloadName = fileName
+        };
+        
+        Console.WriteLine("-----------------------------------Stop uploading battery log-----------------------------------");
+
+        return fileContentResult;
+    }
+    
+    [HttpDelete("DeleteBatteryLog")]
+    public IActionResult DeleteBatteryLog(string fileName)
+    {
+        Console.WriteLine("-----------------------------------Start deleting downloaded battery log-----------------------------------");
+        string filePath = $"/home/ubuntu/backend/downloadBatteryLog/{fileName}";
+        try
+        {
+            if (System.IO.File.Exists(filePath))
+            {
+                System.IO.File.Delete(filePath);
+                Console.WriteLine("-----------------------------------Stop deleting downloaded battery log-----------------------------------");
+                return Ok();
+            }
+            else
+            {
+                return NotFound("File not found.");
+            }
+        }
+        catch (Exception ex)
+        {
+            return StatusCode(500, $"Internal server error: {ex.Message}");
+        }
+    }
+    
+    private void SaveJobStatus(string jobId, string status, string fileName = null)
+    {
+        JobStatuses[jobId] = new JobStatus
+        {
+            JobId = jobId,
+            Status = status,
+            FileName = fileName,
+            StartTime = DateTime.UtcNow // Initialize StartTime when saving
+        };
+    }
+    
+    [HttpGet("GetJobResult")]
+    public ActionResult GetJobResult(string jobId)
+    {
+        if (string.IsNullOrEmpty(jobId))
+        {
+            return BadRequest(new { status = "Error", message = "Job ID is required." });
+        }
+        
+        if (!JobStatuses.TryGetValue(jobId, out var jobStatus))
+        {
+            return NotFound();
+        }
+
+        if (jobStatus.Status == "Completed")
+        {
+            return Ok(new { status = "Completed",  fileName = jobStatus.FileName });
+        }
+        else if (jobStatus.Status == "Failed")
+        {
+            return StatusCode(500, new { status = "Failed", message = "Job processing failed." });
+        }
+        else if (jobStatus.Status == "Processing")
+        {
+            // Check for timeout
+            var startTime = jobStatus.StartTime;
+            var currentTime = DateTime.UtcNow;
+
+            if ((currentTime - startTime).TotalMinutes > 60)//60 minutes as timeout => Running multiple tasks in parallel on a crowded backend server will increase the time each task takes to complete
+            {
+                return StatusCode(500, new { status = "Failed", message = "Job in back end timeout exceeded." });
+            }
+
+            return Ok(new { status = "Processing" });
+        }
+        else
+        {
+            return BadRequest(new { status = "Unknown", message = "Unknown job status." });
+        }
+    }
+    
+    
     [HttpPost(nameof(InsertNewAction))]
     public async Task<ActionResult<IEnumerable<Object>>> InsertNewAction([FromBody] UserAction action, Token authToken)
     {

csharp/App/Backend/DataTypes/Methods/Session.cs

@@ -91,6 +91,33 @@ public static class SessionMethods
         Console.WriteLine("-----------------------------------Stop updating firmware-----------------------------------");
     }
     
+    public static async Task RunDownloadLogScript(this Session? session, String vpnIp, Int64 batteryNode,Int64 product)
+    {
+        Console.WriteLine("-----------------------------------Start downloading battery log-----------------------------------");
+        string scriptPath = (product == 0) 
+            ? "/home/ubuntu/backend/downloadBatteryLog/download_bms_log_Salimax.sh" 
+            : "/home/ubuntu/backend/downloadBatteryLog/download_bms_log_Salidomo.sh";
+    
+        await Task.Run(() =>
+        {
+            var process = new Process
+            {
+                StartInfo = new ProcessStartInfo
+                {
+                    FileName = "/bin/bash",
+                    Arguments = $"{scriptPath} {vpnIp} {batteryNode}",
+                    UseShellExecute = false,
+                    RedirectStandardOutput = true
+                }
+            };
+    
+            process.Start();
+            var output = process.StandardOutput.ReadToEnd();
+            process.WaitForExit();
+            Console.WriteLine(output);
+        });
+        Console.WriteLine("-----------------------------------Stop downloading battery log-----------------------------------");
+    }
 
     public static async Task<Boolean> SendInstallationConfig(this Session? session, Int64 installationId, Configuration configuration)
     {