Add support for short world notation in placeholders (#4819)

Author: RedstoneFuture

Bukkit/src/main/java/com/plotsquared/bukkit/placeholder/PAPIPlaceholders.java

@@ -71,6 +71,10 @@ public String onPlaceholderRequest(Player p, String identifier) {
                 return "";
             }
 
+            if (identifier.equals("this")) {
+                identifier = pl.getLocation().getWorldName();
+            }
+
             return pl.getPlotCount(identifier) > 0 ?
                     PlaceholderAPIPlugin.booleanTrue() :
                     PlaceholderAPIPlugin.booleanFalse();
@@ -82,6 +86,10 @@ public String onPlaceholderRequest(Player p, String identifier) {
                 return "";
             }
 
+            if (identifier.equals("this")) {
+                identifier = pl.getLocation().getWorldName();
+            }
+
             return String.valueOf(pl.getPlotCount(identifier));
         }
 
@@ -91,6 +99,10 @@ public String onPlaceholderRequest(Player p, String identifier) {
                 return "";
             }
 
+            if (identifier.equals("this")) {
+                identifier = pl.getLocation().getWorldName();
+            }
+
             return String.valueOf(PlotQuery.newQuery()
                     .ownedBy(pl)
                     .inWorld(identifier)
@@ -99,6 +111,39 @@ public String onPlaceholderRequest(Player p, String identifier) {
                     .count());
         }
 
+        if (identifier.startsWith("server_plot_count_")) {
+            identifier = identifier.substring("server_plot_count_".length());
+            if (identifier.isEmpty()) {
+                return "";
+            }
+
+            if (identifier.equals("this")) {
+                identifier = pl.getLocation().getWorldName();
+            }
+
+            return String.valueOf(PlotQuery.newQuery()
+                    .allPlots()
+                    .inWorld(identifier)
+                    .count());
+        }
+
+        if (identifier.startsWith("server_base_plot_count_")) {
+            identifier = identifier.substring("server_base_plot_count_".length());
+            if (identifier.isEmpty()) {
+                return "";
+            }
+
+            if (identifier.equals("this")) {
+                identifier = pl.getLocation().getWorldName();
+            }
+
+            return String.valueOf(PlotQuery.newQuery()
+                    .allPlots()
+                    .inWorld(identifier)
+                    .whereBasePlot()
+                    .count());
+        }
+
         // PlotSquared placeholders
         return PlotSquared.platform().placeholderRegistry().getPlaceholderValue(identifier, pl);
     }

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

@@ -225,6 +225,15 @@ private void registerDefault() {
                 return Integer.toString(metaDataAccess.get().orElse(0));
             }
         });
+        this.createPlaceholder("server_plot_count", player -> Integer.toString(PlotQuery.newQuery()
+                .allPlots()
+                .count())
+        );
+        this.createPlaceholder("server_base_plot_count", player -> Integer.toString(PlotQuery.newQuery()
+                .allPlots()
+                .whereBasePlot()
+                .count())
+        );
     }
 
     /**