From 3532df32fdf882971f321f2fb143ac41147a8f75 Mon Sep 17 00:00:00 2001
From: Suphonchai Phoonsawat <suphonchai.ph@gmail.com>
Date: Tue, 20 Jan 2026 05:38:42 +0700
Subject: [PATCH] Refactor message consumption to start after 8:10 AM and
 implement time checks for operating hours

---
 BMA.EHR.CheckInConsumer/Program.cs | 100 +++++++++++++++--------------
 1 file changed, 51 insertions(+), 49 deletions(-)

diff --git a/BMA.EHR.CheckInConsumer/Program.cs b/BMA.EHR.CheckInConsumer/Program.cs
index 40a9db26..e09c61c6 100644
--- a/BMA.EHR.CheckInConsumer/Program.cs
+++ b/BMA.EHR.CheckInConsumer/Program.cs
@@ -13,9 +13,6 @@ var configuration = new ConfigurationBuilder()
 
 WriteToConsole("Consumer Start!");
 
-// Wait until 8:00 AM before starting to consume messages
-await WaitUntil8AM();
-
 var host = configuration["Rabbit:Host"] ?? "";
 var user = configuration["Rabbit:User"] ?? "";
 var pass = configuration["Rabbit:Password"] ?? "";
@@ -24,52 +21,63 @@ var queue = configuration["Rabbit:Queue"] ?? "basic-queue";
 // create connection
 var factory = new ConnectionFactory()
 {
-    //Uri = new Uri("amqp://admin:P@ssw0rd@192.168.4.11:5672")
-    HostName = host,// หรือ hostname ของ RabbitMQ Server ที่คุณใช้
-    UserName = user, // ใส่ชื่อผู้ใช้ของคุณ
-    Password = pass // ใส่รหัสผ่านของคุณ
+    HostName = host,
+    UserName = user,
+    Password = pass
 };
 
 using var connection = factory.CreateConnection();
 using var channel = connection.CreateModel();
 
-//channel.QueueDeclare(queue: "bma-checkin-queue", durable: true, exclusive: false, autoDelete: false, arguments: null);
 channel.QueueDeclare(queue: queue, durable: true, exclusive: false, autoDelete: false, arguments: null);
 
 var consumer = new EventingBasicConsumer(channel);
+string? consumerTag = null;
+bool isConsuming = false;
 
 consumer.Received += async (model, ea) =>
 {
     var body = ea.Body.ToArray();
     var message = Encoding.UTF8.GetString(body);
+    
+    // Double-check time before processing (safety check)
+    if (!IsWithinOperatingHours())
+    {
+        WriteToConsole($"Message received outside operating hours. Requeuing message.");
+        channel.BasicNack(ea.DeliveryTag, false, true); // Requeue the message
+        return;
+    }
+    
     await CallRestApi(message);
-
-    // convert string into object
-    //var request = JsonConvert.DeserializeObject<CheckInRequest>(message);
-    //using (var db = new ApplicationDbContext())
-    //{
-    //    var item = new AttendantItem
-    //    {
-    //        Name = request.Name,
-    //        CheckInDateTime = request.CheckInDateTime,
-    //    };
-    //    db.AttendantItems.Add(item);
-    //    db.SaveChanges();
-
-    //    WriteToConsole($"ได้รับคำขอจาก Queue: {message}");
-    //    WriteToConsole($"ตอบกลับจาก REST API: {JsonConvert.SerializeObject(item)}");
-    //}
-
     WriteToConsole($"ได้รับคำขอจาก Queue: {message}");
-    //WriteToConsole($"ตอบกลับจาก REST API: {JsonConvert.SerializeObject(item)}");
 };
 
-//channel.BasicConsume(queue: "bma-checkin-queue", autoAck: true, consumer: consumer);
-channel.BasicConsume(queue: queue, autoAck: true, consumer: consumer);
+// Monitor and control consumer based on time schedule
+using var timer = new PeriodicTimer(TimeSpan.FromMinutes(1));
 
-//Console.WriteLine("\nPress 'Enter' to exit the process...");
-
-await Task.Delay(-1);
+while (await timer.WaitForNextTickAsync())
+{
+    var shouldBeConsuming = IsWithinOperatingHours();
+    
+    if (shouldBeConsuming && !isConsuming)
+    {
+        // Start consuming
+        consumerTag = channel.BasicConsume(queue: queue, autoAck: true, consumer: consumer);
+        isConsuming = true;
+        WriteToConsole($"✅ Started consuming messages at {GetCurrentBangkokTime():yyyy-MM-dd HH:mm:ss}");
+    }
+    else if (!shouldBeConsuming && isConsuming)
+    {
+        // Stop consuming
+        if (consumerTag != null)
+        {
+            channel.BasicCancel(consumerTag);
+            consumerTag = null;
+        }
+        isConsuming = false;
+        WriteToConsole($"⏸️  Stopped consuming messages at {GetCurrentBangkokTime():yyyy-MM-dd HH:mm:ss}. Will resume after 08:10 tomorrow.");
+    }
+}
 
 static void WriteToConsole(string message)
 {
@@ -98,28 +106,22 @@ async Task CallRestApi(string requestData)
     }
 }
 
-async Task WaitUntil8AM()
+DateTime GetCurrentBangkokTime()
 {
-    // Get current time in Bangkok timezone
     var bangkokTimeZone = TimeZoneInfo.FindSystemTimeZoneById("SE Asia Standard Time");
-    var currentTime = TimeZoneInfo.ConvertTimeFromUtc(DateTime.UtcNow, bangkokTimeZone);
+    return TimeZoneInfo.ConvertTimeFromUtc(DateTime.UtcNow, bangkokTimeZone);
+}
+
+bool IsWithinOperatingHours()
+{
+    var currentTime = GetCurrentBangkokTime();
+    var startTime = new TimeSpan(8, 10, 0); // 8:10 AM
+    var endTime = new TimeSpan(23, 59, 59); // End of day
     
-    var targetTime = new DateTime(currentTime.Year, currentTime.Month, currentTime.Day, 8, 10, 0);
+    var currentTimeOfDay = currentTime.TimeOfDay;
     
-    // If current time is already past 8:10 AM today, start immediately
-    if (currentTime >= targetTime)
-    {
-        WriteToConsole($"Current time is {currentTime:HH:mm:ss}. Starting consumer immediately.");
-        return;
-    }
-    
-    // Calculate time to wait
-    var timeToWait = targetTime - currentTime;
-    WriteToConsole($"Current time is {currentTime:HH:mm:ss}. Waiting until 08:10:00 to start consuming messages.");
-    WriteToConsole($"Time to wait: {timeToWait.Hours} hours, {timeToWait.Minutes} minutes, {timeToWait.Seconds} seconds");
-    
-    await Task.Delay(timeToWait);
-    WriteToConsole("It's now 08:10:00. Starting to consume messages from queue.");
+    // Consumer should only work from 8:10 AM to end of day
+    return currentTimeOfDay >= startTime && currentTimeOfDay <= endTime;
 }