Supports for permissions range (like essentials.home.limit.<number>)

Core/src/main/java/fr/pandacube/lib/core/permissions/PermEntity.java

@@ -3,7 +3,9 @@ package fr.pandacube.lib.core.permissions;
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
+import java.util.OptionalLong;
 import java.util.Set;
+import java.util.stream.LongStream;
 
 import fr.pandacube.lib.core.chat.ChatUtil.DisplayTreeNode;
 import fr.pandacube.lib.core.permissions.PermissionsCachedBackendReader.CachedEntity;
@@ -91,6 +93,49 @@ public abstract class PermEntity {
 	}
 	
 	
+	public LongStream getPermissionRangeValues(String permissionPrefix) {
+		return getPermissionRangeValues(permissionPrefix, null, null);
+	}
+	
+	public LongStream getPermissionRangeValues(String permissionPrefix, String server) {
+		return getPermissionRangeValues(permissionPrefix, server, null);
+	}
+	
+	public LongStream getPermissionRangeValues(String permissionPrefix, String server, String world) {
+		String prefixWithEndingDot = permissionPrefix.endsWith(".") ? permissionPrefix : (permissionPrefix + ".");
+		int prefixLength = prefixWithEndingDot.length();
+		return listEffectivePermissions(server, world).entrySet().stream()
+				.filter(e -> e.getValue()) // permission must be positive
+				.map(e -> e.getKey()) // keep only the permission node (key), since the value is always true
+				.filter(p -> p.startsWith(prefixWithEndingDot)) // keep only relevant permissions
+				.map(p -> p.substring(prefixLength)) // keep only what is after the prefix
+				.map(suffix -> { // convert to long
+					try {
+						return Long.parseLong(suffix);
+					}
+					catch (NumberFormatException e) {
+						return null;
+					}
+				})
+				.filter(longSuffix -> longSuffix != null)
+				.mapToLong(longSuffix -> longSuffix)
+				.sorted();
+	}
+	
+	
+	public OptionalLong getPermissionRangeMax(String permissionPrefix) {
+		return getPermissionRangeMax(permissionPrefix, null, null);
+	}
+
+	public OptionalLong getPermissionRangeMax(String permissionPrefix, String server) {
+		return getPermissionRangeMax(permissionPrefix, server, null);
+	}
+	
+	public OptionalLong getPermissionRangeMax(String permissionPrefix, String server, String world) {
+		return getPermissionRangeValues(permissionPrefix, server, world).max();
+	}
+	
+	
 	public Boolean hasPermission(String permission) {
 		return hasPermission(permission, null, null);
 	}

Core/src/main/java/fr/pandacube/lib/core/players/IOffPlayer.java

@@ -1,7 +1,9 @@
 package fr.pandacube.lib.core.players;
 
 import java.util.Calendar;
+import java.util.OptionalLong;
 import java.util.UUID;
+import java.util.stream.LongStream;
 
 import fr.pandacube.lib.core.chat.ChatColorUtil;
 import fr.pandacube.lib.core.db.DBException;
@@ -158,8 +160,7 @@ public interface IOffPlayer {
 			return online.hasPermission(permission);
 		
 		// at this point, the player is offline
-		Boolean res = getPermissionUser().hasPermission(permission);
+		return getPermissionUser().hasPermissionOr(permission, null, null, false);
-		return res != null ? res : false;
 	}
 	
 	/**
@@ -183,6 +184,42 @@ public interface IOffPlayer {
 		return getPermissionUser().hasPermissionExpression(permissionExpression, null, null);
 	}
 
+	/**
+	 * Lists all the values for a set of permission indicating an integer in a range.
+	 * <p>
+	 * A permission range is used to easily attribute a number to a group or player,
+	 * like the maximum number of homes allowed. For instance, if the player has the permission
+	 * {@code essentials.home.12}, this method would return a stream containing the value 12,
+	 * if the parameter {@code permissionPrefix} is {@code "essentials.home."}.
+	 * <p>
+	 * The use of a stream allow the caller to get either the maximum, the minimum, or do any
+	 * other treatment to the values.
+	 * @param permissionPrefix the permission prefix to search for.
+	 * @return a LongStream containing all the values found for the specified permission prefix.
+	 */
+	public default LongStream getPermissionRangeValues(String permissionPrefix) {
+		IOnlinePlayer online = getOnlineInstance();
+		
+		if (online != null)
+			return online.getPermissionRangeValues(permissionPrefix);
+		
+		// at this point, the player is offline
+		return getPermissionUser().getPermissionRangeValues(permissionPrefix, null, null);
+	}
+	
+	/**
+	 * Returns the maximum value returned by {@link IOffPlayer#getPermissionRangeValues(String)}.
+	 */
+	public default OptionalLong getPermissionRangeMax(String permissionPrefix) {
+		IOnlinePlayer online = getOnlineInstance();
+		
+		if (online != null)
+			return online.getPermissionRangeMax(permissionPrefix);
+		
+		// at this point, the player is offline
+		return getPermissionUser().getPermissionRangeMax(permissionPrefix, null, null);
+	}
+
 	/**
 	 * Tells if the this player is part of the specified group
 	 * 

Core/src/main/java/fr/pandacube/lib/core/players/IOnlinePlayer.java

@@ -1,7 +1,9 @@
 package fr.pandacube.lib.core.players;
 
 import java.util.Locale;
+import java.util.OptionalLong;
 import java.util.UUID;
+import java.util.stream.LongStream;
 
 import org.geysermc.floodgate.api.FloodgateApi;
 import org.geysermc.floodgate.api.player.FloodgatePlayer;
@@ -100,6 +102,26 @@ public interface IOnlinePlayer extends IOffPlayer {
 	 * or it may result in a {@link StackOverflowError}.
 	 */
 	public abstract boolean hasPermissionExpression(String permission);
+
+	/**
+	 * Lists all the values for a set of permission indicating an integer in a range.
+	 * <p>
+	 * A permission range is used to easily attribute a number to a group or player,
+	 * like the maximum number of homes allowed. For instance, if the player has the permission
+	 * {@code essentials.home.12}, this method would return a stream containing the value 12,
+	 * if the parameter {@code permissionPrefix} is {@code "essentials.home."}.
+	 * <p>
+	 * The use of a stream allow the caller to get either the maximum, the minimum, or do any
+	 * other treatment to the values.
+	 * @param permissionPrefix the permission prefix to search for.
+	 * @return a LongStream containing all the values found for the specified permission prefix.
+	 */
+	public abstract LongStream getPermissionRangeValues(String permissionPrefix);
+	
+	/**
+	 * Returns the maximum value returned by {@link IOffPlayer#getPermissionRangeValues(String)}.
+	 */
+	public abstract OptionalLong getPermissionRangeMax(String permissionPrefix);