fix: Add user friendly message for creationdate placeholder

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -27,10 +27,10 @@ body:
       description: Which server version version you using? If your server version is not listed, it is not supported. Update to a supported version first.
       multiple: false
       options:
-        - '1.19.1'
         - '1.19'
         - '1.18.2'
         - '1.18.1'
+        - '1.18'
         - '1.17.1'
         - '1.16.5'
     validations:

Bukkit/src/main/java/com/plotsquared/bukkit/listener/BlockEventListener.java

@@ -121,23 +121,6 @@ public class BlockEventListener implements Listener {
             Material.TURTLE_EGG,
             Material.TURTLE_SPAWN_EGG
     );
-    private static final Set<Material> SNOW;  // needed as Tag.SNOW isn't present in 1.16.5
-
-    static {
-        if (PlotSquared.platform().serverVersion()[1] < 17) {
-            SNOW = Set.of(
-                    Material.SNOW,
-                    Material.SNOW_BLOCK
-            );
-        } else {
-            SNOW = Set.of(
-                    Material.SNOW,
-                    Material.SNOW_BLOCK,
-                    Material.POWDER_SNOW // only since 1.17
-            );
-        }
-    }
-
     private final PlotAreaManager plotAreaManager;
     private final WorldEdit worldEdit;
 
@@ -546,7 +529,7 @@ public class BlockEventListener implements Listener {
             event.setCancelled(true);
             return;
         }
-        if (SNOW.contains(event.getNewState().getType())) {
+        if (Tag.SNOW.isTagged(event.getNewState().getType())) {
             if (!plot.getFlag(SnowFormFlag.class)) {
                 plot.debug("Snow could not form because snow-form = false");
                 event.setCancelled(true);
@@ -578,7 +561,7 @@ public class BlockEventListener implements Listener {
             return;
         }
         Class<? extends BooleanFlag<?>> flag;
-        if (SNOW.contains(event.getNewState().getType())) {
+        if (Tag.SNOW.isTagged(event.getNewState().getType())) {
             flag = SnowFormFlag.class;
         } else if (Tag.ICE.isTagged(event.getNewState().getType())) {
             flag = IceFormFlag.class;
@@ -695,7 +678,7 @@ public class BlockEventListener implements Listener {
             }
             return;
         }
-        if (SNOW.contains(blockType)) {
+        if (Tag.SNOW.isTagged(blockType)) {
             if (!plot.getFlag(SnowMeltFlag.class)) {
                 plot.debug("Snow could not melt because snow-melt = false");
                 event.setCancelled(true);

Core/src/main/java/com/plotsquared/core/util/placeholders/PlaceholderRegistry.java

@@ -164,7 +164,7 @@ public final class PlaceholderRegistry {
                     PlayerManager.getPlayerList(plot.getDenied(), player));
         });
         this.createPlaceholder("currentplot_creationdate", (player, plot) -> {
-            if (plot.getTimestamp() == 0) {
+            if (plot.getTimestamp() == 0 || !plot.hasOwner()) {
                 return legacyComponent(TranslatableCaption.of("info.unknown"), player);
             }
             long creationDate = plot.getTimestamp();