Implement tab completion for seen and whois. (#1440)

Essentials/src/com/earth2me/essentials/commands/Commandseen.java

@@ -16,6 +16,7 @@ import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
 import java.util.UUID;
+import java.util.Collections;
 
 import static com.earth2me.essentials.I18n.tl;
 
@@ -210,4 +211,13 @@ public class Commandseen extends EssentialsCommand {
         });
 
     }
+
+    @Override
+    protected List<String> getTabCompleteOptions(Server server, CommandSource sender, String commandLabel, String[] args) {
+        if (args.length == 1) {
+            return getPlayers(server, sender);
+        } else {
+            return Collections.emptyList();
+        }
+    }
 }

Essentials/src/com/earth2me/essentials/commands/Commandwhois.java

@@ -9,6 +9,8 @@ import org.bukkit.Server;
 import org.bukkit.Statistic;
 
 import java.util.Locale;
+import java.util.Collections;
+import java.util.List;
 
 import static com.earth2me.essentials.I18n.tl;
 
@@ -57,4 +59,13 @@ public class Commandwhois extends EssentialsCommand {
         sender.sendMessage(tl("whoisMuted", (user.isMuted() ? user.getMuteTimeout() > 0 ? DateUtil.formatDateDiff(user.getMuteTimeout()) : tl("true") : tl("false"))));
 
     }
+
+    @Override
+    protected List<String> getTabCompleteOptions(Server server, CommandSource sender, String commandLabel, String[] args) {
+        if (args.length == 1) {
+            return getPlayers(server, sender);
+        } else {
+            return Collections.emptyList();
+        }
+    }
 }