Add ProjectZomboidUserLog (user.txt)

Two row variants: low-level Connection events and player join/disconnect
events. The LINE regex accepts both shapes; analysers route via
CONNECTION (action/index/guid/id) and PLAYER_EVENT (steamid/player/event)
named-group regexes. Detectors: filename match plus content signatures
on either variant.

src/Log/ProjectZomboid/ProjectZomboidUserLog.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace IndifferentKetchup\Codex\Log\ProjectZomboid;
+
+use IndifferentKetchup\Codex\Analyser\AnalyserInterface;
+use IndifferentKetchup\Codex\Analyser\PatternAnalyser;
+use IndifferentKetchup\Codex\Detective\FilenameDetector;
+use IndifferentKetchup\Codex\Detective\WeightedSinglePatternDetector;
+use IndifferentKetchup\Codex\Parser\ParserInterface;
+use IndifferentKetchup\Codex\Parser\PatternParser;
+use IndifferentKetchup\Codex\Pattern\ProjectZomboid\UserPattern;
+
+class ProjectZomboidUserLog extends ProjectZomboidEventLog
+{
+    public static function getDefaultParser(): ParserInterface
+    {
+        return static::makePatternParser(
+            UserPattern::LINE,
+            [PatternParser::TIME]
+        );
+    }
+
+    public static function getDefaultAnalyser(): AnalyserInterface
+    {
+        return new PatternAnalyser();
+    }
+
+    public static function getDetectors(): array
+    {
+        return [
+            (new FilenameDetector())
+                ->setPattern('/_user\.txt$/')
+                ->setWeight(0.95),
+            (new WeightedSinglePatternDetector())
+                ->setPattern('/^\[[^\]]+\] Connection (?:add|disconnect) index=\d+ guid=\d+/m')
+                ->setWeight(0.90),
+            (new WeightedSinglePatternDetector())
+                ->setPattern('/^\[[^\]]+\] \d{17} "[^"]+" (?:attempting to join|allowed to join)/m')
+                ->setWeight(0.85),
+        ];
+    }
+
+    public function getTitle(): string
+    {
+        return "Project Zomboid User Log";
+    }
+}

src/Pattern/ProjectZomboid/UserPattern.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace IndifferentKetchup\Codex\Pattern\ProjectZomboid;
+
+/**
+ * Regex constants for the Project Zomboid user.txt format.
+ *
+ * Two row variants share the file: low-level connection events
+ *   [time] Connection {add|disconnect} index=N guid=N id={N|null}.
+ * and player join/leave events
+ *   [time] steamid "player" {attempting|allowed} to join.
+ *
+ * Both variants are accepted by LINE, which captures only the timestamp.
+ */
+class UserPattern
+{
+    public const string LINE = '/^\[(\d{2}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d{3})\] (?:Connection (?:add|disconnect) index=\d+ guid=\d+ id=(?:\d+|null)|\d{17} "[^"]+" .+?)\.?$/';
+
+    public const string CONNECTION = '/^\[\d{2}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d{3}\] Connection (?<action>add|disconnect) index=(?<index>\d+) guid=(?<guid>\d+) id=(?<id>\d+|null)\.?$/';
+
+    public const string PLAYER_EVENT = '/^\[\d{2}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d{3}\] (?<steamid>\d{17}) "(?<player>[^"]+)" (?<event>.+?)\.?$/';
+}