Adds the info command as described in #5

src/main/java/net/knarcraft/stargatecommand/command/TabCommandInfo.java

@@ -0,0 +1,75 @@
+package net.knarcraft.stargatecommand.command;
+
+import net.TheDgtl.Stargate.network.RegistryAPI;
+import net.TheDgtl.Stargate.network.portal.Portal;
+import net.TheDgtl.Stargate.network.portal.PortalFlag;
+import net.knarcraft.stargatecommand.util.PortalFinderHelper;
+import org.apache.commons.lang.StringUtils;
+import org.bukkit.Bukkit;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.TabExecutor;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * This tab-command represents the command for getting information about a seen portal
+ */
+public class TabCommandInfo implements TabExecutor {
+
+    private final RegistryAPI registryAPI;
+
+    /**
+     * Instantiates a new info command
+     *
+     * @param registryAPI <p>A reference to the Registry API</p>
+     */
+    public TabCommandInfo(RegistryAPI registryAPI) {
+        this.registryAPI = registryAPI;
+    }
+
+    @Override
+    public boolean onCommand(@NotNull CommandSender commandSender, @NotNull Command command, @NotNull String s,
+                             @NotNull String[] args) {
+        if (!(commandSender instanceof Player player)) {
+            commandSender.sendMessage("This command can only be used by a player");
+            return true;
+        }
+        Portal portal = PortalFinderHelper.findPortalByRaytrace(registryAPI, player, 15);
+        if (portal == null) {
+            commandSender.sendMessage("You need to look directly at a portal to get information about it");
+            return true;
+        }
+        StringBuilder stringBuilder = new StringBuilder();
+        stringBuilder.append("Information about the Stargate you are currently looking at:").append("\n");
+        stringBuilder.append("|- ").append("Name: ").append(portal.getName()).append("\n");
+        String destination = portal.getDestinationName();
+        if (destination != null && !destination.equalsIgnoreCase("null")) {
+            stringBuilder.append("|- ").append("Destination: ").append(portal.getDestinationName()).append("\n");
+        }
+        stringBuilder.append("|- ").append("Network: ").append(portal.getNetwork().getName()).append("\n");
+        Player owner = Bukkit.getPlayer(portal.getOwnerUUID());
+        if (owner != null) {
+            stringBuilder.append("|- ").append("Owner: ").append(owner.getName()).append("\n");
+        } else {
+            stringBuilder.append("|- ").append("Owner: ").append(portal.getOwnerUUID()).append("\n");
+        }
+        Set<PortalFlag> portalFlags = PortalFlag.parseFlags(portal.getAllFlagsString());
+        stringBuilder.append("|- ").append("Flags: ").append(StringUtils.join(portalFlags, ", ")).append("\n");
+        player.sendMessage(stringBuilder.toString());
+        return true;
+    }
+
+    @Nullable
+    @Override
+    public List<String> onTabComplete(@NotNull CommandSender commandSender, @NotNull Command command, @NotNull String s,
+                                      @NotNull String[] strings) {
+        return new ArrayList<>();
+    }
+
+}