implement log splitting for discord posting

EliteBGS/DiscordLogGenerator.cs

@@ -198,4 +198,53 @@ public class DiscordLogGenerator {
 
         return log.ToString().Trim();
     }
+
+    public virtual string[] SplitLog(string log, int maxcount = 2000) {
+        throw new NotImplementedException();
+    }
+
+    protected string[] SplitLogWithHeader(string log, string header, int maxcount = 2000) {
+        string[] lines = log.Split("\n");
+        List<string> chunks = new();
+        string chunk = string.Empty;
+        bool done = false;
+
+        // First split the log into its headers
+        // skip first bot header line
+        for (int i = 1; i < lines.Length; i++) {
+            string line = lines[i];
+
+            if (line.StartsWith(header) && !string.IsNullOrEmpty(chunk)) {
+                chunks.Add(chunk.Trim());
+                chunk = string.Empty;
+            }
+
+            chunk = chunk + "\n" + line;
+        }
+
+        int curchunk = 0;
+        string botheader = BotHeader().Trim() + "\n";
+        // Leave room for botheder and some leeway
+        int maxlength = (2000 - botheader.Length - 10);
+
+        // Then try to collate chunks
+        for (curchunk = 0; curchunk < chunks.Count; ++curchunk) {
+            int count = chunks[curchunk].Length;
+            while (count < maxlength && (curchunk+1) < chunks.Count) {
+                count += chunks[curchunk + 1].Length + 2;
+                if (count < maxlength) {
+                    chunks[curchunk] += "\n";
+                    chunks[curchunk] += chunks[curchunk + 1];
+                    chunks.RemoveAt(curchunk + 1);
+                }
+            }
+        }
+
+        // Readd bott headers
+        for (int i = 0; i < chunks.Count; i++) {
+            chunks[i] = chunks[i].Insert(0, botheader);
+        }
+
+        return chunks.ToArray();
+    }
 }

EliteBGS/GenericDiscordLog.cs

@@ -1,4 +1,7 @@
-namespace EliteBGS;
+using System.Collections.Generic;
+using System.Windows.Documents;
+
+namespace EliteBGS;
 
 public class GenericDiscordLog : DiscordLogGenerator {
     public override string ToString() {
@@ -8,4 +11,8 @@ public class GenericDiscordLog : DiscordLogGenerator {
     public override string Name {
         get { return "Generic"; }
     }
+
+    public override string[] SplitLog(string log, int maxcount = 2000) {
+        return SplitLogWithHeader(log, "**Date:**", maxcount);
+    }
 }

EliteBGS/MainWindow.xaml.cs

@@ -653,27 +653,17 @@ public partial class MainWindow : MetroWindow {
         }
     }
 
-    private bool CheckDiscordPostMessageLength() {
-        var content = DiscordLog.Text;
-        if (string.IsNullOrEmpty(content)) {
-            return true;
-        }
-
-        if (content.Length >= DiscordPoster.DiscordLimit) {
-            MessageBox.Show("The log is too long for discord posting (limit of 2000 characters).",
-                "Error", MessageBoxButton.OK, MessageBoxImage.Error);
-            return false;
-        }
-
-        return true;
-    }
-
     private void PostToDiscordWebhook(DiscordWebhook hook) {
         if (string.IsNullOrEmpty(DiscordLog.Text)) {
             return;
         }
         try {
-            DiscordPoster.PostToDiscord(hook, DiscordLog.Text);
+            DiscordLogGenerator discord = LogType.SelectedItem as DiscordLogGenerator;
+            var chunks = discord.SplitLog(DiscordLog.Text);
+
+            foreach (var chunk in chunks) {
+                DiscordPoster.PostToDiscord(hook, chunk);
+            }
             Log(string.Format("successfully posted to discord webhook {0}",
                 hook.Name));
         } catch (Exception ex) {
@@ -693,16 +683,10 @@ public partial class MainWindow : MetroWindow {
         if (hook == null) {
             return;
         }
-        if (!CheckDiscordPostMessageLength()) {
-            return;
-        }
         PostToDiscordWebhook(hook);
     }
 
     private void PostToAll_Click(object sender, RoutedEventArgs e) {
-        if (!CheckDiscordPostMessageLength()) {
-            return;
-        }
         foreach (DiscordWebhook hook in Config.Global.Webhooks) {
             PostToDiscordWebhook(hook);
         }

EliteBGS/NonaDiscordLog.cs

@@ -91,4 +91,8 @@ public class NonaDiscordLog : DiscordLogGenerator {
     public override string Name {
         get { return "NovaNavy"; }
     }
+
+    public override string[] SplitLog(string log, int maxcount = 2000) {
+        return SplitLogWithHeader(log, ":clock2: `Date:`", maxcount);
+    }
 }

EliteBGS/OneLineDiscordLog.cs

@@ -1,6 +1,9 @@
 using EliteBGS.LogGenerator;
+using System;
+using System.Collections.Generic;
 using System.Linq;
 using System.Text;
+using System.Windows.Documents;
 
 namespace EliteBGS;
 
@@ -25,6 +28,25 @@ public class OneLineDiscordLog : DiscordLogGenerator {
         return "";
     }
 
+    public override string[] SplitLog(string log, int maxcount = 2000) {
+        string[] lines = log.Split('\n');
+        List<string> chunks = new();
+        string chunk = string.Empty;
+
+        for (int i = 0; i < lines.Length; i++) {
+            string line = lines[i];
+            if ((chunk.Length + line.Length) > maxcount || i == lines.Length - 1) {
+                chunks.Add(chunk.Trim());
+                chunk = string.Empty;
+                chunk = chunk.Insert(0, BotHeader()).Trim();
+            } else {
+                chunk = chunk + "\n" + line;
+            }
+        }
+
+        return chunks.ToArray();
+    }
+
     public override string GenerateDiscordLog(Report report) {
         StringBuilder log = new StringBuilder();