Initial commit

src/entity/message_payload.rs

@@ -0,0 +1,47 @@
+use mxlink::matrix_sdk::ruma::events::room::message::{
+    AudioMessageEventContent, MessageType, TextMessageEventContent,
+};
+use mxlink::matrix_sdk::ruma::{OwnedEventId, OwnedUserId};
+
+use mxlink::ThreadInfo;
+
+/// MessagePayload is like matrix-sdk's MessageType, but represents only message types that the bot deals with and payloads are massaged a bit.
+#[derive(Debug, Clone)]
+pub enum MessagePayload {
+    Text(TextMessageEventContent),
+
+    Audio(AudioMessageEventContent),
+
+    Reaction {
+        key: String,
+        reacted_to_event_payload: Box<Self>,
+        reacted_to_event_id: OwnedEventId,
+        reacted_to_event_sender_id: OwnedUserId,
+    },
+
+    /// Represents an encrypted message
+    Encrypted(ThreadInfo),
+}
+
+impl TryInto<MessagePayload> for MessageType {
+    type Error = String;
+
+    fn try_into(self) -> Result<MessagePayload, Self::Error> {
+        let payload = match self {
+            MessageType::Text(text_content) => MessagePayload::Text(text_content),
+            MessageType::Audio(audio_content) => {
+                // We can consider inspecting `audio_content.voice.is_some()` and ignoring audio which is not a voice message.
+                //
+                // However, at the time of this writing (2024-09-10), certain popular clients (Element iOS) send voice messages
+                // as regular audio messages, without voice annotation as per MSC3245.
+                // For this reason, we handle all audio.
+                MessagePayload::Audio(audio_content)
+            }
+            other => {
+                return Err(format!("Unsupported message type: {:?}", other));
+            }
+        };
+
+        Ok(payload)
+    }
+}