Add reverse world blacklist system (#1167)

* Add reverse world blacklist system

src/main/java/com/gamingmesh/jobs/container/Job.java

@@ -86,6 +86,7 @@ public class Job {
 
     private final List<String> fDescription = new ArrayList<>(), maxLevelCommands = new ArrayList<>();
     private List<String> worldBlacklist = new ArrayList<>();
+    private boolean reversedWorldBlacklist = false;
 
     private final List<Quest> quests = new ArrayList<>();
     private int maxDailyQuests = 1;
@@ -644,13 +645,21 @@ public class Job {
     }
 
     public boolean isWorldBlackListed(Block block, Entity ent) {
-	if (worldBlacklist.isEmpty())
-	    return false;
+        if (worldBlacklist.isEmpty())
+            return isReversedWorldBlacklist();
 
-	if (block != null && worldBlacklist.contains(block.getWorld().getName()))
-	    return true;
+        if (block != null)
+            return worldBlacklist.contains(block.getWorld().getName()) != reversedWorldBlacklist;
 
-	return ent != null && worldBlacklist.contains(ent.getWorld().getName());
+        return ent != null && worldBlacklist.contains(ent.getWorld().getName()) != reversedWorldBlacklist;
+    }
+
+    public boolean isReversedWorldBlacklist() {
+        return reversedWorldBlacklist;
+    }
+
+    public void setReversedWorldBlacklist(boolean reversedWorldBlacklist) {
+        this.reversedWorldBlacklist = reversedWorldBlacklist;
     }
 
     public boolean isIgnoreMaxJobs() {
@@ -663,6 +672,6 @@ public class Job {
 
     @Override
     public boolean equals(Object obj) {
-	return obj instanceof Job ? isSame((Job) obj) : false;
+        return obj instanceof Job && isSame((Job) obj);
     }
 }

src/main/resources/jobs/_EXAMPLE.yml

@@ -3,7 +3,7 @@
 # Edited by roracle to include 1.13 items and item names, preparing for 1.14 as well.
 
 # ATTENTION!
-# This is just an example job and will not be included into job list. Recomended to keep
+# This is just an example job and will not be included into job list. Recommended to keep
 # it around just for reference. Can be removed if needed.
 
 # Must be one word. This job will be ignored as this is just example of all possible actions.
@@ -575,7 +575,10 @@ exampleJob:
   commands-on-max-level:
   - 'msg [playerName] Max level of [job] reached!'
   - 'player:jobs stats'
-
+  
+  # Turns the "world-blacklist" list into a whitelist. This essentially means the job only works in the specified worlds.
+  reverse-world-blacklist-functionality: false
+  
   # World list in which this job will not work. World name should be exact
   world-blacklist:
   - plotworld