Added in voicechannel and hides flags now when there are none

If the member isn't in VC, it won't show the `in voicechannel` property at all.
This way it only shows info that actually matters, making it easier to read.

This change has also been done to the `flags` property.

Author: Tais993

application/src/main/java/org/togetherjava/tjbot/commands/moderation/WhoIsCommand.java

@@ -1,6 +1,7 @@
 package org.togetherjava.tjbot.commands.moderation;
 
 import net.dv8tion.jda.api.EmbedBuilder;
+import net.dv8tion.jda.api.entities.GuildVoiceState;
 import net.dv8tion.jda.api.entities.Member;
 import net.dv8tion.jda.api.entities.Role;
 import net.dv8tion.jda.api.entities.User;
@@ -95,6 +96,7 @@ public void onSlashCommand(@NotNull final SlashCommandEvent event) {
 
         StringBuilder descriptionBuilder =
                 new StringBuilder().append(handleUserIdentification(user))
+                    .append(handleVoiceState(member))
                     .append("\n**Is bot:** ")
                     .append(user.isBot())
                     .append(handlePossibleBooster(member))
@@ -118,6 +120,16 @@ public void onSlashCommand(@NotNull final SlashCommandEvent event) {
                     "Click to see profile"));
     }
 
+    private static @NotNull String handleVoiceState(@NotNull final Member member) {
+        GuildVoiceState voiceState = Objects.requireNonNull(member.getVoiceState(),
+                "The given voiceState cannot be null");
+        if (voiceState.inVoiceChannel()) {
+            return "\n**In voicechannel:** " + (voiceState.getChannel().getAsMention());
+        } else {
+            return "";
+        }
+    }
+
 
     /**
      * Generates whois embed based on the given parameters.
@@ -141,7 +153,7 @@ public void onSlashCommand(@NotNull final SlashCommandEvent event) {
 
     /**
      * Handles boosting properties of a {@link Member}
-     * 
+     *
      * @param member the {@link Member} to take the booster properties from
      * @return user readable {@link String}
      */
@@ -157,7 +169,7 @@ public void onSlashCommand(@NotNull final SlashCommandEvent event) {
 
     /**
      * Handles the user's identifying properties (such as ID, tag)
-     * 
+     *
      * @param user the {@link User} to take the identifiers from
      * @return user readable {@link StringBuilder}
      */
@@ -171,7 +183,7 @@ public void onSlashCommand(@NotNull final SlashCommandEvent event) {
 
     /**
      * Formats the roles into a user readable {@link String}
-     * 
+     *
      * @param member member to take the Roles from
      * @return user readable {@link String} of the roles
      */
@@ -181,26 +193,32 @@ private static String formatRoles(final @NotNull Member member) {
 
     /**
      * Formats Hypesquad and the flags
-     * 
+     *
      * @param flags the {@link Collection} of {@link net.dv8tion.jda.api.entities.User.UserFlag}
      *        (recommend {@link java.util.EnumSet}
      * @return user readable {@link StringBuilder}
      */
     private static @NotNull StringBuilder handleUserFlags(
             final @NotNull Collection<User.UserFlag> flags) {
-        return formatHypesquad(flags).append("\n**Flags:** ").append(formatUserFlags(flags));
+        String formattedFlags = formatUserFlags(flags);
+
+        if (formattedFlags.isBlank()) {
+            return formatHypesquad(flags);
+        } else {
+            return formatHypesquad(flags).append("\n**Flags:** ").append(formatUserFlags(flags));
+        }
     }
 
     /**
      * Formats user readable Hypesquad item
-     * 
+     *
      * @param flags the {@link Collection} of {@link net.dv8tion.jda.api.entities.User.UserFlag}
      *        (recommend {@link java.util.EnumSet}
      * @return user readable {@link StringBuilder}
      */
     private static @NotNull StringBuilder formatHypesquad(
             final @NotNull Collection<User.UserFlag> flags) {
-        StringBuilder stringBuilder = new StringBuilder("**Hypesquad:** ");
+        StringBuilder stringBuilder = new StringBuilder("**\nHypesquad:** ");
 
         if (flags.contains(User.UserFlag.HYPESQUAD_BALANCE)) {
             stringBuilder.append(User.UserFlag.HYPESQUAD_BALANCE.getName());
@@ -217,7 +235,7 @@ private static String formatRoles(final @NotNull Member member) {
 
     /**
      * Formats the flags into a user readable {@link String}, filters Hypesquad relating flags
-     * 
+     *
      * @param flags the {@link Collection} of {@link net.dv8tion.jda.api.entities.User.UserFlag}
      *        (recommend {@link java.util.EnumSet}
      * @return the user readable string