Fix tricks working for non-bot maintainers

src/main/java/com/mcmoddev/mmdbot/modules/commands/community/server/tricks/CmdAddTrick.java

@@ -119,6 +119,16 @@ protected void execute(final CommandEvent event) {
                 return;
             }
 
+            if (!event.getChannel().getType().isGuild()) {
+                event.reply("This command only works in guilds!");
+                return;
+            }
+
+            if (!Utils.memberHasRole(event.getMember(), MMDBot.getConfig().getRole("bot_maintainer"))) {
+                event.reply("Only Bot Maintainers can use this command.");
+                return;
+            }
+
             Tricks.addTrick(trickType.createFromArgs(event.getArgs()));
             event.getMessage().reply("Added trick!").mentionRepliedUser(false).queue();
         }

src/main/java/com/mcmoddev/mmdbot/modules/commands/community/server/tricks/CmdEditTrick.java

@@ -145,6 +145,16 @@ protected void execute(final CommandEvent event) {
                 return;
             }
 
+            if (!event.getChannel().getType().isGuild()) {
+                event.reply("This command only works in guilds!");
+                return;
+            }
+
+            if (!Utils.memberHasRole(event.getMember(), MMDBot.getConfig().getRole("bot_maintainer"))) {
+                event.reply("Only Bot Maintainers can use this command.");
+                return;
+            }
+
             Trick trick = trickType.createFromArgs(event.getArgs());
             Optional<Trick> originalTrick = Tricks.getTricks().stream()
                 .filter(t -> t.getNames().stream().anyMatch(n -> trick.getNames().contains(n))).findAny();

src/main/java/com/mcmoddev/mmdbot/utilities/Utils.java

@@ -636,6 +636,9 @@ public static String uppercaseFirstLetter(final String string) {
      * @return if the member has the role
      */
     public static boolean memberHasRole(final Member member, final long roleId) {
+        if (member == null) {
+            return false;
+        }
         return member.getRoles().stream().anyMatch(r -> r.getIdLong() == roleId);
     }