3.1.2 bugfixes (see long description)

- add messages in /rank and /rankup for when the configuration has a rankup to a non-existent rank.
- add invalid rankup message
- fix error for placeholders when prestiging is disabled
- add message for when a rank has no requirements

src/main/java/sh/okx/rankup/commands/RanksCommand.java

@@ -32,6 +32,14 @@ public class RanksCommand implements CommandExecutor {
         plugin.sendMessage(sender, Message.RANKS_CURRENT, rank, next);
         message = Message.RANKS_INCOMPLETE;
       } else {
+        // helpful message to say there is a null rankup
+        if(next == null) {
+          plugin.getMessage(Message.INVALID_RANKUP).failIfEmpty().send(sender);
+          plugin.getLogger().severe("Rankup from " + rank.getName() + " to " + rank.getNext() +
+              " is defined but " + rank.getNext() + " does not exist.");
+          return true;
+        }
+
         plugin.sendMessage(sender, message, rank, next);
       }
       rank = next;

src/main/java/sh/okx/rankup/commands/RankupCommand.java

@@ -32,8 +32,14 @@ public class RankupCommand implements CommandExecutor {
 
     Rankups rankups = plugin.getRankups();
     Rank rank = rankups.getByPlayer(player);
+    Rank next = rankups.next(rank);
     if (!plugin.checkRankup(player)) {
       return true;
+    } else if(next == null) {
+      plugin.getLogger().severe("Rankup from " + rank.getName() + " to " + rank.getNext() +
+          " is defined but " + rank.getNext() + " does not exist.");
+      plugin.getMessage(Message.INVALID_RANKUP).failIfEmpty().send(player);
+      return true;
     }
 
     FileConfiguration config = plugin.getConfig();
@@ -52,11 +58,11 @@ public class RankupCommand implements CommandExecutor {
       case "text":
         confirming.put(player, System.currentTimeMillis());
         plugin.replaceMoneyRequirements(plugin.getMessage(rank, Message.CONFIRMATION)
-            .replaceRanks(player, rank, rankups.next(rank)), player, rank)
+            .replaceRanks(player, rank, next), player, rank)
             .send(player);
         break;
       case "gui":
-        Gui.of(player, rank, rankups.next(rank), plugin).open(player);
+        Gui.of(player, rank, next, plugin).open(player);
         break;
       case "none":
         plugin.rankup(player);

src/main/java/sh/okx/rankup/messages/Message.java

@@ -27,7 +27,8 @@ public enum Message {
   NOT_HIGH_ENOUGH("not-high-enough"),
   PRESTIGE_SUCCESS_PUBLIC("prestige.success-public"),
   PRESTIGE_SUCCESS_PRIVATE("prestige.success-private"),
-  PRESTIGE_CONFIRMATION("prestige.confirmation");
+  PRESTIGE_CONFIRMATION("prestige.confirmation"),
+  INVALID_RANKUP("invalid-rankup");
 
   @Getter
   private final String name;

src/main/java/sh/okx/rankup/placeholders/RankupExpansion.java

@@ -29,8 +29,12 @@ public class RankupExpansion extends PlaceholderExpansion {
     Rank nextRank = rank == null ? null : rankups.next(rank);
 
     Prestiges prestiges = plugin.getPrestiges();
-    Prestige prestige = prestiges.getByPlayer(player);
-    Prestige nextPrestige = prestiges.next(prestige);
+    Prestige prestige = null;
+    Prestige nextPrestige = null;
+    if(prestiges != null) {
+      prestige = prestiges.getByPlayer(player);
+      nextPrestige = prestiges.next(prestige);
+    }
 
     if (params.startsWith("requirement_")) {
       String[] parts = params.split("_", 3);

src/main/java/sh/okx/rankup/ranks/Rank.java

@@ -11,6 +11,7 @@ import sh.okx.rankup.messages.MessageBuilder;
 import sh.okx.rankup.requirements.DeductibleRequirement;
 import sh.okx.rankup.requirements.Operation;
 import sh.okx.rankup.requirements.Requirement;
+import sh.okx.rankup.requirements.operation.AllOperation;
 
 import java.util.HashSet;
 import java.util.List;
@@ -39,6 +40,9 @@ public class Rank {
     if (requirementsSection != null) {
       requirements = plugin.getRequirementRegistry().getRequirements(requirementsSection);
       operation = plugin.getOperationRegistry().getOperation(section.getString("operation"));
+    } else if(section.contains("next")) {
+      plugin.getLogger().severe("Rank " + section.getName() + " has no requirements.");
+      return null;
     }
 
     return new Rank(plugin,