Handle message deletions

src/state/messages/convo.ts

@@ -106,6 +106,7 @@ export class Convo {
     string,
     {id: string; message: ChatBskyConvoSendMessage.InputSchema['message']}
   > = new Map()
+  private deletedMessages: Set<string> = new Set()
   private footerItems: Map<string, ConvoItem> = new Map()
 
   private pendingEventIngestion: Promise<void> | undefined
@@ -474,7 +475,14 @@ export class Convo {
       }
     })
 
-    return items.map((item, i) => {
+    return items
+      .filter(item => {
+        if (isConvoItemMessage(item)) {
+          return !this.deletedMessages.has(item.message.id)
+        }
+        return true
+      })
+      .map((item, i) => {
         let nextMessage = null
         const isMessage = isConvoItemMessage(item)
 
@@ -506,6 +514,32 @@ export class Convo {
       })
   }
 
+  async deleteMessage(messageId: string) {
+    this.deletedMessages.add(messageId)
+    this.commit()
+
+    await this.agent.api.chat.bsky.convo.deleteMessageForSelf(
+      {
+        convoId: this.convoId,
+        messageId,
+      },
+      {
+        encoding: 'application/json',
+        headers: {
+          Authorization: this.__tempFromUserDid,
+        },
+      },
+    )
+
+    // remove from optimistic
+    this.deletedMessages.delete(messageId)
+    // remove from either new or past messages
+    this.pastMessages.delete(messageId)
+    this.newMessages.delete(messageId)
+    // commit
+    this.commit()
+  }
+
   destroy() {
     this.status = ConvoStatus.Destroyed
     this.commit()