WIP - needs test class and testing

src/main/java/world/bentobox/bentobox/api/commands/admin/AdminDeleteCommand.java

@@ -0,0 +1,71 @@
+package world.bentobox.bentobox.api.commands.admin;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+import world.bentobox.bentobox.api.commands.CompositeCommand;
+import world.bentobox.bentobox.api.user.User;
+import world.bentobox.bentobox.util.Util;
+
+public class AdminDeleteCommand extends CompositeCommand {
+
+    public AdminDeleteCommand(CompositeCommand parent) {
+        super(parent, "delete");
+    }
+    
+    @Override
+    public void setup() {
+        setPermission("admin.delete");
+        setParameters("commands.admin.delete.parameters");
+        setDescription("commands.admin.delete.description");
+    }
+
+    @Override
+    public boolean execute(User user, String label, List<String> args) {
+        // If args are not right, show help
+        if (args.size() != 1) {
+            showHelp(this, user);
+            return false;
+        }
+        // Get target
+        UUID targetUUID = getPlayers().getUUID(args.get(0));
+        if (targetUUID == null) {
+            user.sendMessage("general.errors.unknown-player");
+            return false;
+        }
+        if (!getIslands().hasIsland(getWorld(), targetUUID)) {
+            user.sendMessage("general.errors.player-has-no-island");
+            return false;
+        }
+        // Team leaders should be kicked before deleting otherwise the whole team will become weird
+        if (getIslands().inTeam(getWorld(), targetUUID) && getIslands().getTeamLeader(getWorld(), targetUUID).equals(targetUUID)) {
+            user.sendMessage("commands.admin.delete.cannot-delete-team-leader");
+            return false;
+        }
+        // Confirm
+        askConfirmation(user, () -> deletePlayer(user, targetUUID));
+        return false;
+    }
+    
+    private void deletePlayer(User user, UUID targetUUID) {
+        // Delete player and island
+        user.sendMessage("commands.admin.delete.delete-island", "[xyz]", Util.xyz(getIslands().getIsland(getWorld(), targetUUID).getCenter().toVector()));
+        getIslands().deleteIsland(getIslands().getIsland(getWorld(), targetUUID), true);
+        getIslands().removePlayer(getWorld(), targetUUID);
+        getPlayers().clearHomeLocations(getWorld(), targetUUID);        
+        user.sendMessage("general.success");
+    }
+
+    @Override
+    public Optional<List<String>> tabComplete(User user, String alias, List<String> args) {
+        String lastArg = !args.isEmpty() ? args.get(args.size()-1) : "";
+        if (args.isEmpty()) {
+            // Don't show every player on the server. Require at least the first letter
+            return Optional.empty();
+        }
+        List<String> options = new ArrayList<>(Util.getOnlinePlayerList(user));
+        return Optional.of(Util.tabLimit(options, lastArg));
+    }
+}