feat(chat): send Discord stickers into Minecraft (closes #74)

minecord-chat/src/main/java/me/axieum/mcmod/minecord/impl/chat/callback/discord/MessageReceivedListener.java

@@ -6,6 +6,7 @@
 import eu.pb4.placeholders.api.PlaceholderContext;
 import eu.pb4.placeholders.api.PlaceholderHandler;
 import net.dv8tion.jda.api.entities.Message;
+import net.dv8tion.jda.api.entities.sticker.StickerItem;
 import net.dv8tion.jda.api.events.message.MessageReceivedEvent;
 import net.dv8tion.jda.api.hooks.ListenerAdapter;
 import org.jetbrains.annotations.Nullable;
@@ -35,9 +36,11 @@ public void onMessageReceived(MessageReceivedEvent event)
         if (!event.getMessage().getContentRaw().isEmpty())
             onText(event);
 
+        // Link any stickers
+        event.getMessage().getStickers().forEach(sticker -> onSticker(event, sticker));
+
         // Link any attachments
-        for (Message.Attachment attachment : event.getMessage().getAttachments())
-            onAttachment(event, attachment);
+        event.getMessage().getAttachments().forEach(attachment -> onAttachment(event, attachment));
     }
 
     /**
@@ -118,6 +121,49 @@ public void onText(MessageReceivedEvent event)
         }
     }
 
+    /**
+     * Handles a sticker of a given message received event.
+     *
+     * @param event message received event
+     * @param sticker message sticker
+     */
+    public void onSticker(MessageReceivedEvent event, StickerItem sticker)
+    {
+        final long channelId = event.getChannel().getIdLong();
+
+        /*
+         * Prepare the message placeholders.
+         */
+
+        final @Nullable PlaceholderContext ctx = PlaceholdersExt.getMinecordServerContext();
+        final Map<String, PlaceholderHandler> placeholders = Map.of(
+            // The author's tag (i.e. username#discriminator), e.g. Axieum#1001
+            "tag", string(event.getAuthor().getAsTag()),
+            // The author's username, e.g. Axieum
+            "username", string(event.getAuthor().getName()),
+            // The author's username discriminator, e.g. 1001
+            "discriminator", string(event.getAuthor().getDiscriminator()),
+            // The author's nickname or username
+            "author", string(
+                event.getMember() != null ? event.getMember().getEffectiveName() : event.getAuthor().getName()
+            ),
+            // The link to the sticker image
+            "url", string(sticker.getIconUrl()),
+            // The name of the sticker
+            "name", string(sticker.getName())
+        );
+
+        /*
+         * Dispatch the message.
+         */
+
+        MinecraftDispatcher.dispatch(
+            entry -> PlaceholdersExt.parseText(entry.minecraft.stickerNode, ctx, placeholders),
+            entry -> entry.minecraft.sticker != null && entry.id == channelId
+        );
+        LOGGER.info(PlaceholdersExt.parseString("@${tag} sent sticker ${name}", ctx, placeholders));
+    }
+
     /**
      * Handles an attachment of a given message received event.
      *

minecord-chat/src/main/java/me/axieum/mcmod/minecord/impl/chat/config/ChatConfig.java

@@ -440,6 +440,26 @@ public static class MinecraftSchema
             /** Pre-parsed 'unreact' text node. */
             public transient TextNode unreactNode;
 
+            /**
+             * A user sent a message that contained stickers.
+             *
+             * <ul>
+             *   <li>{@code ${author}} &mdash; the author's nickname or username</li>
+             *   <li>{@code ${tag}} &mdash; the author's tag (i.e. username#discriminator), e.g. Axieum#1001</li>
+             *   <li>{@code ${username}} &mdash; the author's username, e.g. Axieum</li>
+             *   <li>{@code ${discriminator}} &mdash; the author's username discriminator, e.g. 1001</li>
+             *   <li>{@code ${url}} &mdash; the link to the sticker image</li>
+             *   <li>{@code ${name}} &mdash; the name of the sticker</li>
+             * </ul>
+             */
+            @Comment("""
+                A user sent a message that contained stickers
+                Usages: ${author}, ${tag}, ${username}, ${discriminator}, ${url} and ${name}""")
+            public String sticker = "<cmd:'@${tag} '><hover:show_text:'<i>Sent from Discord</i>'><color:#00aaff>${author}</color></hover></cmd> <dark_gray>></dark_gray> <url:'${url}'><hover:show_text:'Sticker'><underline><blue>${name}</blue></underline></hover></url>";
+
+            /** Pre-parsed 'sticker' text node. */
+            public transient TextNode stickerNode;
+
             /**
              * A user sent a message that contained attachments.
              *
@@ -517,6 +537,7 @@ public void validatePostLoad()
             entry.minecraft.editNode = parseNode(entry.minecraft.edit);
             entry.minecraft.reactNode = parseNode(entry.minecraft.react);
             entry.minecraft.unreactNode = parseNode(entry.minecraft.unreact);
+            entry.minecraft.stickerNode = parseNode(entry.minecraft.sticker);
             entry.minecraft.attachmentNode = parseNode(entry.minecraft.attachment);
         });
     }