Start on database interactions for ladders

Author: Innectic

API/src/main/java/me/innectic/permissify/api/database/DatabaseHandler.java

@@ -27,6 +27,7 @@
 import lombok.Getter;
 import me.innectic.permissify.api.group.Permission;
 import me.innectic.permissify.api.group.group.PermissionGroup;
+import me.innectic.permissify.api.group.ladder.AbstractLadder;
 import me.innectic.permissify.api.profile.PermissifyProfile;
 
 import java.util.*;
@@ -274,4 +275,7 @@ public DatabaseHandler(ConnectionInformation connectionInformation) {
      * @param group the new group to become the default.
      */
     public abstract void setDefaultGroup(PermissionGroup group);
+
+    public abstract void setGroupLadder(PermissionGroup group, AbstractLadder ladder);
+    public abstract Optional<AbstractLadder> getGroupLadder(PermissionGroup group);
 }

API/src/main/java/me/innectic/permissify/api/database/handlers/SQLHandler.java

@@ -30,6 +30,7 @@
 import me.innectic.permissify.api.group.Permission;
 import me.innectic.permissify.api.database.ConnectionInformation;
 import me.innectic.permissify.api.group.group.PermissionGroup;
+import me.innectic.permissify.api.group.ladder.AbstractLadder;
 import me.innectic.permissify.api.profile.PermissifyProfile;
 import me.innectic.permissify.api.util.FormatterType;
 
@@ -793,6 +794,20 @@ public void setDefaultGroup(PermissionGroup group) {
         }
     }
 
+    @Override
+    public void setGroupLadder(PermissionGroup group, AbstractLadder ladder) {
+        // TODO: Make this method less expensive
+        group.setLadder(ladder);
+        this.cachedGroups.removeIf(pGroup -> pGroup.getName().equals(group.getName())); // TODO:  Groups should have their own equals thing
+        this.cachedGroups.add(group);
+    }
+
+    @Override
+    public Optional<AbstractLadder> getGroupLadder(PermissionGroup group) {
+        // TODO: Actually commit this to the database
+        return Optional.ofNullable(group.getLadder());
+    }
+
     private boolean hasFormattingTable(Connection connection, String database) {
         try {
             if (isUsingSqlite) {

API/src/main/java/me/innectic/permissify/api/group/group/PermissionGroup.java

@@ -26,6 +26,7 @@
 
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
+import lombok.Setter;
 import me.innectic.permissify.api.group.Permission;
 import me.innectic.permissify.api.group.ladder.AbstractLadder;
 
@@ -44,7 +45,7 @@ public class PermissionGroup implements Serializable {
     @Getter private final String suffix;
     @Getter private List<Permission> permissions = new ArrayList<>();
     @Getter private Map<UUID, Boolean> players = new HashMap<>();
-    @Getter private AbstractLadder ladder;  // TODO: Ask the database for the ladder
+    @Getter @Setter private AbstractLadder ladder;  // TODO: Ask the database for the ladder
 
     /**
      * Remove a permission from the group