buttons buttons and more buttons

src/helpers/messages/send_message.ts

@@ -3,6 +3,7 @@ import { rest } from "../../rest/rest.ts";
 import { structures } from "../../structures/mod.ts";
 import { DiscordChannelTypes } from "../../types/channels/channel_types.ts";
 import { DiscordAllowedMentionsTypes } from "../../types/messages/allowed_mentions_types.ts";
+import { ButtonStyles } from "../../types/messages/components/button_styles.ts";
 import { CreateMessage } from "../../types/messages/create_message.ts";
 import { DiscordMessage, Message } from "../../types/messages/message.ts";
 import { Errors } from "../../types/misc/errors.ts";
@@ -11,6 +12,8 @@ import { endpoints } from "../../util/constants.ts";
 import { requireBotChannelPermissions } from "../../util/permissions.ts";
 import { camelKeysToSnakeCase } from "../../util/utils.ts";
 import { validateLength } from "../../util/validate_length.ts";
+import { isActionRow } from "../type_guards/is_action_row.ts";
+import { isButton } from "../type_guards/is_button.ts";
 
 /** Send a message to the channel. Requires SEND_MESSAGES permission. */
 export async function sendMessage(
@@ -93,6 +96,60 @@ export async function sendMessage(
     }
   }
 
+  if (content.components?.length) {
+    let actionRowCounter = 0;
+
+    for (const component of content.components) {
+      // 5 Link buttons can not have a custom_id
+      if (isButton(component)) {
+        if (
+          component.type === ButtonStyles.Link &&
+          component.customId
+        ) {
+          throw new Error(Errors.LINK_BUTTON_CANNOT_HAVE_CUSTOM_ID);
+        }
+        if (
+          !component.customId
+        ) {
+          if (component.type !== ButtonStyles.Link) {
+            throw new Error(Errors.BUTTON_REQUIRES_CUSTOM_ID);
+          }
+        }
+
+        if (!validateLength(component.label, { max: 80 })) {
+          throw new Error(Errors.COMPONENT_LABEL_TOO_BIG);
+        }
+
+        if (
+          component.customId &&
+          !validateLength(component.customId, { max: 100 })
+        ) {
+          throw new Error(Errors.COMPONENT_CUSTOM_ID_TOO_BIG);
+        }
+      }
+
+      if (!isActionRow(component)) {
+        continue;
+      }
+
+      actionRowCounter++;
+      // Max of 5 ActionRows per message
+      if (actionRowCounter > 5) throw new Error(Errors.TOO_MANY_ACTION_ROWS);
+
+      // Max of 5 Buttons (or any component type) within an ActionRow
+      if (component.components?.length > 5) {
+        throw new Error(Errors.TOO_MANY_COMPONENTS);
+      }
+    }
+  }
+
+  if (
+    content.nonce &&
+    !validateLength(content.nonce.toString(), { max: 25 })
+  ) {
+    throw new Error(Errors.NONCE_TOO_LONG);
+  }
+
   const result = await rest.runMethod<Message>(
     "post",
     endpoints.CHANNEL_MESSAGES(channelId),