Parse only the zone templates the map's zone tree uses

The world server read all 861 CZONE files; map 108 uses 633. The zone tree
is now read first and the parser loads only the templates it names. A
template with no CZONE file aborts boot from the parser, replacing the
check in loadZones.

The tree no longer carries player-city zones (mbScryer drops them at
export), so isPlayerCity and its skip are gone. An old tree still holding
them aborts boot: template 0 has no CZONE file.

Value changes: none; 228 unused templates are no longer in memory.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/engine/gameManager/ZoneManager.java

@@ -39,6 +39,7 @@ public enum ZoneManager {
     ZONEMANAGER;
 
     public static HashMap<Integer, CZoneTemplate> _zone_templates = new HashMap<>();
+    public static ArrayList<ZoneTreeEntry> zoneTree;
 
     public static final Set<Zone> macroZones = Collections.newSetFromMap(new ConcurrentHashMap<>());
     private static final ConcurrentHashMap<Integer, Zone> zonesByID = new ConcurrentHashMap<>(MBServerStatics.CHM_INIT_CAP, MBServerStatics.CHM_LOAD);
@@ -76,37 +77,35 @@ public enum ZoneManager {
         Logger.info("Zone templates: " + _zone_templates.size());
     }
 
-    // Static zones from the map's zone tree, then player-city zones from the DB. False aborts boot.
+    // Read before the zone templates, so only the templates this map uses are parsed. False aborts boot.
 
-    public static boolean loadZones(int mapID) {
+    public static boolean loadZoneTree(int mapID) {
-
-        ArrayList<ZoneTreeEntry> zoneTree;
-        ArrayList<Zone> cityZones;
-        Zone zone;
-        int staticCount = 0;
-        boolean templatesMissing = false;
 
         zoneTree = ZoneTreeParser.parseZoneTree(mapID);
 
-        if (zoneTree == null)
+        return zoneTree != null;
-            return false;
+    }
+
+    public static TreeSet<Integer> getZoneTreeTemplateIDs() {
+
+        TreeSet<Integer> templateIDs = new TreeSet<>();
 
         for (ZoneTreeEntry treeEntry : zoneTree)
-            if (!treeEntry.isPlayerCity && !_zone_templates.containsKey(treeEntry.template)) {
+            templateIDs.add(treeEntry.template);
-                Logger.error("Zone " + treeEntry.uid + " (" + treeEntry.name + ") has no CZONE template " + treeEntry.template);
-                templatesMissing = true;
-            }
 
-        if (templatesMissing)
+        return templateIDs;
-            return false;
+    }
 
-        // Player-city zones in the tree are a recording's cities; the live ones come from the DB
+    // Static zones from the map's zone tree, then player-city zones from the DB. False aborts boot.
+
+    public static boolean loadZones() {
+
+        ArrayList<Zone> cityZones;
+        Zone zone;
+        int staticCount = 0;
 
         for (ZoneTreeEntry treeEntry : zoneTree) {
 
-            if (treeEntry.isPlayerCity)
-                continue;
-
             if (treeEntry.parent != 0 && getZoneByUUID(treeEntry.parent) == null) {
                 Logger.error("Zone " + treeEntry.uid + " (" + treeEntry.name + ") has no parent zone " + treeEntry.parent);
                 return false;

src/engine/parsers/cache/ZoneParser.java

@@ -21,25 +21,33 @@ import org.json.JSONObject;
 import org.pmw.tinylog.Logger;
 
 import java.io.File;
+import java.util.Collection;
 import java.util.HashMap;
 
-// Loads zone templates from the client cache JSON (CZONE/<id>.json).
+// Loads zone templates from the client cache JSON (CZONE/<id>.json), only those the map's zone tree uses.
 
 public class ZoneParser {
 
     private static final String zonePath = ConfigManager.DEFAULT_DATA_DIR + "CZONE/";
 
-    public static HashMap<Integer, CZoneTemplate> parseZoneFolder() {
+    public static HashMap<Integer, CZoneTemplate> parseZoneTemplates(Collection<Integer> templateIds) {
 
         HashMap<Integer, CZoneTemplate> zoneTemplates = new HashMap<>();
-        File[] zoneFiles = CacheParserUtil.listJsonFiles(zonePath);
+        File zoneFile;
-        int templateId;
         JSONObject zoneJson;
         int failedCount = 0;
 
-        for (File zoneFile : zoneFiles) {
+        for (int templateId : templateIds) {
+
+            zoneFile = new File(zonePath + templateId + ".json");
+
+            if (!zoneFile.exists()) {
+                Logger.error("Zone template " + templateId + " has no CZONE file: " + zoneFile.getAbsolutePath());
+                failedCount++;
+                continue;
+            }
+
             try {
-                templateId = CacheParserUtil.templateIdFromFile(zoneFile);
                 zoneJson = CacheParserUtil.readJsonFile(zoneFile);
                 zoneTemplates.put(templateId, parseZoneEntry(templateId, zoneJson));
             } catch (Exception e) {
@@ -48,7 +56,7 @@ public class ZoneParser {
             }
         }
 
-        Logger.info("Loaded " + zoneTemplates.size() + " of " + zoneFiles.length + " zone templates");
+        Logger.info("Loaded " + zoneTemplates.size() + " of " + templateIds.size() + " zone templates");
         logCounts(zoneTemplates);
 
         // Partial zone data is never usable; null tells the caller to abort

src/engine/parsers/map/ZoneTreeParser.java

@@ -67,7 +67,6 @@ public class ZoneTreeParser {
         zone.parent = zoneJson.getInt("parent");
         zone.template = zoneJson.getInt("template");
         zone.name = zoneJson.getString("name");
-        zone.isPlayerCity = zoneJson.getBoolean("isPlayerCity");
         zone.offset = CacheParserUtil.readVector3(zoneJson.getJSONArray("offset"));
         zone.peaceZone = zoneJson.getBoolean("peaceZone");
         zone.terrain = zoneJson.getString("terrain");

src/engine/parsers/objects/ZoneTreeEntry.java

@@ -19,7 +19,6 @@ public class ZoneTreeEntry {
     public int parent;
     public int template;
     public String name;
-    public boolean isPlayerCity;
     public Vector3fImmutable offset;
     public boolean peaceZone;
     public String terrain;

src/engine/server/world/WorldServer.java

@@ -435,8 +435,15 @@ public class WorldServer {
         Logger.info("Indexing Cache Templates");
         CObjectIndex.build();
 
+        Logger.info("Loading Zone Tree");
+
+        if (!ZoneManager.loadZoneTree(worldMapID)) {
+            Logger.error("ABORT! Zone tree failed to load!");
+            exitServer(1);
+        }
+
         Logger.info("Loading Cache Zone Templates");
-        CZoneTemplate._zones = ZoneParser.parseZoneFolder();
+        CZoneTemplate._zones = ZoneParser.parseZoneTemplates(ZoneManager.getZoneTreeTemplateIDs());
 
         if (CZoneTemplate._zones == null || CZoneTemplate._zones.isEmpty()) {
             Logger.error("ABORT! Cache zone templates failed to load!");
@@ -550,8 +557,8 @@ public class WorldServer {
 
         Logger.info("Loading all Zones");
 
-        if (!ZoneManager.loadZones(worldMapID)) {
+        if (!ZoneManager.loadZones()) {
-            Logger.error("ABORT! Zone tree failed to load!");
+            Logger.error("ABORT! Zones failed to load!");
             exitServer(1);
         }