improve standard format by adding date range and tool version

EliteBGS/DiscordLogGenerator.cs

@@ -3,6 +3,8 @@ using System.Linq;
 using System.Collections.Generic;
 using System.Text;
 using EliteBGS.LogGenerator;
+using System.Reflection;
+using System.Runtime.CompilerServices;
 
 namespace EliteBGS;
 
@@ -23,6 +25,37 @@ public class DiscordLogGenerator {
         new SearchAndRescueFormat(),
     };
 
+    protected virtual string GetToolVersion() {
+        Version v = Assembly.GetCallingAssembly().GetName().Version;
+        string ver;
+        if (v == null) {
+            ver = "v?.?.?";
+        } else {
+            ver = "v" + v.ToString(3);
+        }
+        return string.Format("EliteBGS {0}", ver);
+    }
+
+    protected virtual DateTime GetDateOfEarliestEntry(Objective objective) {
+        return objective
+            .Transactions
+            .SelectMany(x => x.Entries)
+            .OrderBy(x => x.Timestamp)
+            .First()
+            .Timestamp
+            ;
+    }
+
+    protected virtual DateTime GetDateOfLatestEntry(Objective objective) {
+        return objective
+            .Transactions
+            .SelectMany(x => x.Entries)
+            .OrderByDescending(x => x.Timestamp)
+            .First()
+            .Timestamp
+            ;
+    }
+
     protected virtual string GenerateSummary(Objective objective) {
         StringBuilder sb = new StringBuilder();
 
@@ -76,7 +109,14 @@ public class DiscordLogGenerator {
 
         string summary = GenerateSummary(objective);
 
-        log.AppendFormat("**Date:** {0}\n", DateTime.Now.ToString("dd/MM/yyyy"));
+        log.AppendFormat("**Log Generated:** {0} by {1}\n", 
+            DateTime.Now.ToString("dd/MM/yyyy"),
+            GetToolVersion()
+            );
+        log.AppendFormat("**Date:** {0} - {1}\n",
+            GetDateOfEarliestEntry(objective),
+            GetDateOfLatestEntry(objective)
+            );
         log.AppendFormat("**Target:** {0}\n", location);
         if (!string.IsNullOrEmpty(summary)) {
             log.AppendFormat("**Summary**: {0}\n", summary);