Improve log querying?

src/main/java/land/chipmunk/chipmunkbot/commands/LogQueryCommand.java

@@ -20,14 +20,15 @@ import java.io.FileInputStream;
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 import java.util.Scanner;
+import java.util.Arrays;
 import java.util.function.Predicate;
 import java.util.zip.GZIPInputStream;
 
 public class LogQueryCommand {
-  private Thread thread;
+  private LogQueryThread thread;
 
   private static SimpleCommandExceptionType ALREADY_QUERYING_LOGS_EXCEPTION = new SimpleCommandExceptionType(ComponentMessage.wrap(Component.translatable("Another log query is already running")));
-  private static SimpleCommandExceptionType ALREADY_NOT_QUERYING_LOGS_EXCEPTION = new SimpleCommandExceptionType(ComponentMessage.wrap(Component.translatable("No log query is currently running")));
+  private static SimpleCommandExceptionType NOT_QUERYING_LOGS_EXCEPTION = new SimpleCommandExceptionType(ComponentMessage.wrap(Component.translatable("No log query is currently running")));
 
   public static void register (CommandDispatcher dispatcher) {
     final LogQueryCommand instance = new LogQueryCommand();
@@ -36,7 +37,7 @@ public class LogQueryCommand {
       literal("logquery")
         .then(
           literal("abort")
-            // .executes(this::abortCommand)
+            .executes(instance::abortCommand)
         )
         .then(
           literal("count")
@@ -52,6 +53,10 @@ public class LogQueryCommand {
                 // .executes(instance::reportCommand)
             )
         )
+        .then(
+          literal("progress")
+            .executes(instance::progressCommand)
+        )
     );
   }
 
@@ -67,10 +72,14 @@ public class LogQueryCommand {
     throw ALREADY_QUERYING_LOGS_EXCEPTION.create();
   }
 
-  /* public int abortCommand (CommandContext<CommandSource> context) throws CommandSyntaxException {
-    if (!querying()) throw ALREADY_NOT_QUERYING_LOGS_EXCEPTION.create();
-    
-  } */
+  public int abortCommand (CommandContext<CommandSource> context) throws CommandSyntaxException {
+    if (!querying()) throw NOT_QUERYING_LOGS_EXCEPTION.create();
+
+    thread.breakQuery();
+    context.getSource().sendOutput(Component.translatable("Stopped querying logs"));
+
+    return Command.SINGLE_SUCCESS;    
+  }
 
   public int countCommand (CommandContext<CommandSource> context) throws CommandSyntaxException {
     alreadyQueryingCheck();
@@ -87,24 +96,43 @@ public class LogQueryCommand {
     return Command.SINGLE_SUCCESS;
   }
 
-  @AllArgsConstructor
-  public static class CountThread extends Thread {
+  public int progressCommand (CommandContext<CommandSource> context) {
+    final Component progress = Component.translatable(
+      "Currently reading %s (%s/%s)",
+      Component.text(thread.currentFilename, NamedTextColor.GREEN),
+      Component.text(thread.currentIndex + 1),
+      Component.text(thread.totalFiles)
+    );
+
+    context.getSource().sendOutput(progress, false);
+    return Command.SINGLE_SUCCESS;
+  }
+
+  public static abstract class LogQueryThread extends Thread {
     public Predicate<String> query;
     public File directory;
-    public CommandSource source;
+
+    public String currentFilename = null;
+    public int currentIndex = 0;
+    public int totalFiles;
+
+    private boolean breakFlag;
 
     public void run () {
-      int instances = 0;
-      final long startTime = System.currentTimeMillis();
+      breakFlag = false;
 
-      final String[] filenames = directory.list();
+      String[] filenames = directory.list();
+      if (filenames == null) return;
+      Arrays.sort(filenames);
+      totalFiles = filenames.length;
 
-      if (filenames == null) {
-        source.sendOutput(Component.translatable("Unable to query the bot's logs, as the directory does not exist", NamedTextColor.RED));
-        return;
-      }
+      onStart();
 
       for (String filename : filenames) {
+        currentFilename = filename;
+
+        if (breakFlag) return;
+
         try {
           InputStream is = new FileInputStream(new File(directory, filename));
           if (filename.endsWith(".log.gz")) is = new GZIPInputStream(is);
@@ -113,16 +141,50 @@ public class LogQueryCommand {
           final Scanner scanner = new Scanner(is, StandardCharsets.UTF_8);
 
           while (scanner.hasNextLine()) {
-            if (!query.test(scanner.nextLine())) continue;
-            instances++;
+            final String line = scanner.nextLine();
+            if (!query.test(line)) continue;
+            onMatch(line);
           }
 
           scanner.close();
         } catch (Exception exception) {
           exception.printStackTrace();
         }
-      }
 
+        currentIndex++;
+      }
+    }
+
+    public void breakQuery () {
+      breakFlag = true;
+    }
+
+    public void onStart () {}
+    public void onFinish () {}
+    abstract void onMatch (String line);
+  }
+
+  @AllArgsConstructor
+  public static class CountThread extends LogQueryThread {
+    public int instances = 0;
+    public long startTime;
+    public CommandSource source;
+
+    public CountThread (Predicate<String> query, File directory, CommandSource source) {
+      this.query = query;
+      this.directory = directory;
+      this.source = source;
+    }
+
+    public void onStart () {
+      startTime = System.currentTimeMillis();
+    }
+
+    public void onMatch (String line) {
+      instances++;
+    }
+
+    public void onFinish () {
       double seconds = (double) (System.currentTimeMillis() - startTime) / 1000d;
       source.sendOutput(Component.translatable("Found %s instances of the specified query in %s seconds", Component.text(instances, NamedTextColor.GREEN), Component.text(seconds, NamedTextColor.GREEN)));
     }