Handle emoji content type (#275)

* add containsOnly emoji helper

* add emoji check when sending text message

packages/status-js/src/client/chat.ts

@@ -302,6 +302,14 @@ export class Chat {
   }
 
   public sendTextMessage = async (text: string, responseTo?: string) => {
+    if (text === '') {
+      throw new Error('Text message cannot be empty')
+    }
+
+    const type = containsOnlyEmoji(text)
+      ? ChatMessageProto.ContentType.EMOJI
+      : ChatMessageProto.ContentType.TEXT_PLAIN
+
     // TODO: protos does not support optional fields :-(
     const payload = ChatMessageProto.encode({
       clock: BigInt(Date.now()),
@@ -310,8 +318,8 @@ export class Chat {
       responseTo: responseTo ?? '',
       ensName: '',
       chatId: this.id,
-      messageType: 'COMMUNITY_CHAT',
-      contentType: ChatMessageProto.ContentType.TEXT_PLAIN,
+      contentType: type,
+      messageType: 'COMMUNITY_CHAT' as MessageType,
       sticker: { hash: '', pack: 0 },
       image: {
         type: 'JPEG',

packages/status-js/src/helpers/contains-only-emoji.test.ts

@@ -0,0 +1,17 @@
+import { containsOnlyEmoji } from './contains-only-emoji'
+
+describe('containsOnlyEmoji', () => {
+  it('should be truthy', () => {
+    expect(containsOnlyEmoji('💩')).toBeTruthy()
+    expect(containsOnlyEmoji('💩💩💩💩💩💩')).toBeTruthy()
+  })
+
+  it('should be falsy', () => {
+    expect(containsOnlyEmoji('')).toBeFalsy()
+    expect(containsOnlyEmoji(' ')).toBeFalsy()
+    expect(containsOnlyEmoji(' 💩')).toBeFalsy()
+    expect(containsOnlyEmoji('💩 ')).toBeFalsy()
+    expect(containsOnlyEmoji('text 💩')).toBeFalsy()
+    expect(containsOnlyEmoji('💩 text')).toBeFalsy()
+  })
+})

packages/status-js/src/helpers/contains-only-emoji.ts

@@ -0,0 +1,4 @@
+// todo?: should ignore whitespaces with replace(/\s+/g, '').trim()
+export function containsOnlyEmoji(text: string): boolean {
+  return /^\p{Emoji}+$/gu.test(text)
+}