Fixes tab completion for the add and remove commands #7

src/main/java/net/knarcraft/paidsigns/command/RemoveTabCommand.java

@@ -0,0 +1,69 @@
+package net.knarcraft.paidsigns.command;
+
+import net.knarcraft.paidsigns.PaidSigns;
+import net.knarcraft.paidsigns.container.PaidSign;
+import net.knarcraft.paidsigns.utility.Tokenizer;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.TabExecutor;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ * A representation of the command for removing a paid sign
+ */
+public class RemoveTabCommand implements TabExecutor {
+
+    @Override
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label,
+                             @NotNull String[] args) {
+        List<String> arguments = Tokenizer.tokenize(String.join(" ", args));
+        if (arguments.size() < 1) {
+            return false;
+        }
+        String name = arguments.get(0);
+
+        try {
+            if (PaidSigns.getInstance().getSignManager().removePaidSign(name)) {
+                sender.sendMessage("Successfully removed paid sign");
+            } else {
+                sender.sendMessage("No matching paid sign was found");
+            }
+            return true;
+        } catch (IOException e) {
+            Logger logger = PaidSigns.getInstance().getLogger();
+            logger.log(Level.SEVERE, "Exception encountered while trying to write " +
+                    "to the data file");
+            logger.log(Level.SEVERE, Arrays.toString(e.getStackTrace()));
+            sender.sendMessage("An exception occurred. Please notify the server administrator or check the server log.");
+        }
+        return false;
+    }
+
+    @Nullable
+    @Override
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias,
+                                      @NotNull String[] args) {
+        List<String> arguments = Tokenizer.tokenize(String.join(" ", args));
+        int argumentSize = args[args.length - 1].isEmpty() ? arguments.size() : arguments.size() - 1;
+
+        if (argumentSize < 1) {
+            List<PaidSign> allPaidSigns = PaidSigns.getInstance().getSignManager().getAllPaidSigns();
+            List<String> signIds = new ArrayList<>();
+            for (PaidSign sign : allPaidSigns) {
+                signIds.add("\"" + sign.getName() + "\"");
+            }
+            return signIds;
+        } else {
+            return new ArrayList<>();
+        }
+    }
+
+}