Refactor: Extract discord attachment creation into its own function

services/phoebe-discord/src/sender.rs

@@ -1,6 +1,6 @@
 use phoebe::{
     attachments::attachment_to_url,
-    mid_chat::{ChatMessage, ChatMessageEdit, ChatMessageReference, ChatReference},
+    mid_chat::{ChatAttachment, ChatMessage, ChatMessageEdit, ChatMessageReference, ChatReference},
     prelude::*,
 };
 
@@ -72,6 +72,34 @@ async fn create_webhook_reply_embeds(
     vec![]
 }
 
+async fn create_discord_attachments(source: &'_ ChatMessage) -> Vec<AttachmentType<'_>> {
+    source
+        .attachments
+        .iter()
+        .map(|a| match a {
+            ChatAttachment::Online {
+                url,
+                media_type: Some(media_type),
+            } => {
+                if media_type.starts_with("image/") {
+                    AttachmentType::Image(url)
+                } else {
+                    todo!("Handle non-image online attachment")
+                }
+            }
+            ChatAttachment::Online { .. } => {
+                todo!("Handle online attachment with no media_type")
+            }
+            ChatAttachment::InMemory {
+                file_name, data, ..
+            } => AttachmentType::Bytes {
+                filename: file_name.clone(),
+                data: data.into(),
+            },
+        })
+        .collect()
+}
+
 pub async fn send_discord_message(
     discord: &mut DiscordService,
     source: &ChatMessage,
@@ -95,19 +123,7 @@ pub async fn send_discord_message(
         None
     };
 
-    let files = source
-        .attachments
-        .iter()
-        .map(|a| match a {
-            phoebe::mid_chat::ChatAttachment::Online { url, .. } => AttachmentType::Image(url),
-            phoebe::mid_chat::ChatAttachment::InMemory {
-                file_name, data, ..
-            } => AttachmentType::Bytes {
-                filename: file_name.clone(),
-                data: data.into(),
-            },
-        })
-        .collect::<Vec<_>>();
+    let files = create_discord_attachments(source).await;
 
     if let Some(webhook) = get_or_create_webhook_for_channel(&mut *discord, &channel_id).await {
         let reply_embeds = if let Some((channel, message)) = discord_reply {