Add date filtering to client logs diagnostics

src/TaxBaik.Web/Endpoints/ClientLogs/GetRecentLogsEndpoint.cs

@@ -5,6 +5,7 @@ namespace TaxBaik.Web.Endpoints.ClientLogs;
 public sealed class RecentClientLogEntry
 {
     public string? Timestamp { get; set; }
+    public DateTimeOffset? OccurredAt { get; set; }
     public string? Level { get; set; }
     public string? Source { get; set; }
     public string? Message { get; set; }
@@ -37,6 +38,8 @@ public sealed class GetRecentLogsEndpoint : EndpointWithoutRequest<IReadOnlyList
         var source = Query<string>("source");
         var route = Query<string>("route");
         var term = Query<string>("q");
+        var start = ParseDate(Query<string>("start"));
+        var end = ParseDate(Query<string>("end"));
 
         var logDir = Path.Combine(_environment.ContentRootPath, "logs");
         if (!Directory.Exists(logDir))
@@ -60,7 +63,7 @@ public sealed class GetRecentLogsEndpoint : EndpointWithoutRequest<IReadOnlyList
                     continue;
 
                 var entry = Parse(line);
-                if (Matches(entry, level, source, route, term))
+                if (Matches(entry, level, source, route, term, start, end))
                     entries.Add(entry);
             }
         }
@@ -70,18 +73,21 @@ public sealed class GetRecentLogsEndpoint : EndpointWithoutRequest<IReadOnlyList
 
     private static RecentClientLogEntry Parse(string line)
     {
-        var entry = new RecentClientLogEntry();
-        entry.Timestamp = ExtractTimestamp(line);
-        entry.Level = ExtractBetween(line, "] [", "]");
-        entry.Source = ExtractTokenAfter(line, "ClientLog ", 1);
-        entry.Route = ExtractNamedValue(line, "Route=");
-        entry.Screen = ExtractNamedValue(line, "Screen=");
-        entry.Feature = ExtractNamedValue(line, "Feature=");
-        entry.Action = ExtractNamedValue(line, "Action=");
-        entry.Step = ExtractNamedValue(line, "Step=");
-        entry.BuildVersion = ExtractNamedValue(line, "BuildVersion=");
-        entry.Message = ExtractMessage(line);
-        return entry;
+        var timestamp = ExtractTimestamp(line);
+        return new RecentClientLogEntry
+        {
+            Timestamp = timestamp,
+            OccurredAt = ParseDate(timestamp),
+            Level = ExtractBetween(line, "] [", "]"),
+            Source = ExtractTokenAfter(line, "ClientLog ", 1),
+            Route = ExtractNamedValue(line, "Route="),
+            Screen = ExtractNamedValue(line, "Screen="),
+            Feature = ExtractNamedValue(line, "Feature="),
+            Action = ExtractNamedValue(line, "Action="),
+            Step = ExtractNamedValue(line, "Step="),
+            BuildVersion = ExtractNamedValue(line, "BuildVersion="),
+            Message = ExtractMessage(line)
+        };
     }
 
     private static string? ExtractTimestamp(string line)
@@ -120,7 +126,7 @@ public sealed class GetRecentLogsEndpoint : EndpointWithoutRequest<IReadOnlyList
         return clientIndex >= 0 ? line[(clientIndex + "ClientLog ".Length)..] : line;
     }
 
-    private static bool Matches(RecentClientLogEntry entry, string? level, string? source, string? route, string? term)
+    private static bool Matches(RecentClientLogEntry entry, string? level, string? source, string? route, string? term, DateTimeOffset? start, DateTimeOffset? end)
     {
         if (!string.IsNullOrWhiteSpace(level) &&
             !string.Equals(entry.Level, level, StringComparison.OrdinalIgnoreCase))
@@ -147,9 +153,29 @@ public sealed class GetRecentLogsEndpoint : EndpointWithoutRequest<IReadOnlyList
             return false;
         }
 
+        if (start is not null && (entry.OccurredAt is null || entry.OccurredAt < start))
+        {
+            return false;
+        }
+
+        if (end is not null && (entry.OccurredAt is null || entry.OccurredAt > end))
+        {
+            return false;
+        }
+
         return true;
     }
 
+    private static DateTimeOffset? ParseDate(string? value)
+    {
+        if (string.IsNullOrWhiteSpace(value))
+        {
+            return null;
+        }
+
+        return DateTimeOffset.TryParse(value, out var parsed) ? parsed : null;
+    }
+
     private static string? ExtractNamedValue(string text, string prefix)
     {
         var index = text.IndexOf(prefix, StringComparison.OrdinalIgnoreCase);