CAMERA V1

FATrace.OEMApp/Utils/LogReader.cs

@@ -0,0 +1,42 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+
+namespace FATrace.OEMApp.Utils
+{
+    public static class LogReader
+    {
+        public static IEnumerable<string> ReadTailLines(string filePath, int lineCount)
+        {
+            if (string.IsNullOrWhiteSpace(filePath) || !File.Exists(filePath))
+                return Enumerable.Empty<string>();
+
+            var lines = new LinkedList<string>();
+            try
+            {
+                using var fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
+                using var sr = new StreamReader(fs);
+                string? line;
+                while ((line = sr.ReadLine()) != null)
+                {
+                    lines.AddLast(line);
+                    if (lines.Count > lineCount) lines.RemoveFirst();
+                }
+            }
+            catch
+            {
+                return Enumerable.Empty<string>();
+            }
+            return lines;
+        }
+
+        public static string GetTodayLogPath()
+        {
+            var baseDir = AppContext.BaseDirectory;
+            var logDir = Path.Combine(baseDir, "logs");
+            var file = Path.Combine(logDir, DateTime.Now.ToString("yyyy-MM-dd") + ".log");
+            return file;
+        }
+    }
+}