api(json-rpc): force stickers to be sent as stickers (#4819)

This approach uses a param field to enable forcing the sticker
`viewtype`. The first commit has the memory-only flag implemented, but
this flag is not persistent through the database conversion needed for
draft/undraft. That's why `param` has to be used.

follow up to #4814 
fixes #4739

---------

Co-authored-by: Septias <scoreplayer2000@gmail.comclear>

deltachat-jsonrpc/src/api/mod.rs

@@ -1756,6 +1756,9 @@ impl CommandApi {
         let mut msg = Message::new(Viewtype::Sticker);
         msg.set_file(&sticker_path, None);
 
+        // JSON-rpc does not need heuristics to turn [Viewtype::Sticker] into [Viewtype::Image]
+        msg.force_sticker();
+
         let message_id = deltachat::chat::send_msg(&ctx, ChatId::new(chat_id), &mut msg).await?;
         Ok(message_id.to_u32())
     }

src/chat.rs

@@ -2208,9 +2208,12 @@ async fn prepare_msg_blob(context: &Context, msg: &mut Message) -> Result<()> {
             .with_context(|| format!("attachment missing for message of type #{}", msg.viewtype))?;
 
         let mut maybe_sticker = msg.viewtype == Viewtype::Sticker;
-        if msg.viewtype == Viewtype::Image || maybe_sticker {
+        if msg.viewtype == Viewtype::Image
+            || maybe_sticker && !msg.param.exists(Param::ForceSticker)
+        {
             blob.recode_to_image_size(context, &mut maybe_sticker)
                 .await?;
+
             if !maybe_sticker {
                 msg.viewtype = Viewtype::Image;
             }
@@ -5679,6 +5682,51 @@ mod tests {
         .await
     }
 
+    #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+    async fn test_sticker_jpeg_force() {
+        let alice = TestContext::new_alice().await;
+        let bob = TestContext::new_bob().await;
+        let alice_chat = alice.create_chat(&bob).await;
+
+        let file = alice.get_blobdir().join("sticker.jpg");
+        tokio::fs::write(
+            &file,
+            include_bytes!("../test-data/image/avatar1000x1000.jpg"),
+        )
+        .await
+        .unwrap();
+
+        // Images without force_sticker should be turned into [Viewtype::Image]
+        let mut msg = Message::new(Viewtype::Sticker);
+        msg.set_file(file.to_str().unwrap(), None);
+        let sent_msg = alice.send_msg(alice_chat.id, &mut msg).await;
+        let msg = bob.recv_msg(&sent_msg).await;
+        assert_eq!(msg.get_viewtype(), Viewtype::Image);
+
+        // Images with `force_sticker = true` should keep [Viewtype::Sticker]
+        let mut msg = Message::new(Viewtype::Sticker);
+        msg.set_file(file.to_str().unwrap(), None);
+        msg.force_sticker();
+        let sent_msg = alice.send_msg(alice_chat.id, &mut msg).await;
+        let msg = bob.recv_msg(&sent_msg).await;
+        assert_eq!(msg.get_viewtype(), Viewtype::Sticker);
+
+        // Images with `force_sticker = true` should keep [Viewtype::Sticker]
+        // even on drafted messages
+        let mut msg = Message::new(Viewtype::Sticker);
+        msg.set_file(file.to_str().unwrap(), None);
+        msg.force_sticker();
+        alice_chat
+            .id
+            .set_draft(&alice, Some(&mut msg))
+            .await
+            .unwrap();
+        let mut msg = alice_chat.id.get_draft(&alice).await.unwrap().unwrap();
+        let sent_msg = alice.send_msg(alice_chat.id, &mut msg).await;
+        let msg = bob.recv_msg(&sent_msg).await;
+        assert_eq!(msg.get_viewtype(), Viewtype::Sticker);
+    }
+
     #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
     async fn test_sticker_gif() -> Result<()> {
         test_sticker(

src/message.rs

@@ -664,6 +664,12 @@ impl Message {
         self.viewtype
     }
 
+    /// Forces the message to **keep** [Viewtype::Sticker]
+    /// e.g the message will not be converted to a [Viewtype::Image].
+    pub fn force_sticker(&mut self) {
+        self.param.set_int(Param::ForceSticker, 1);
+    }
+
     /// Returns the state of the message.
     pub fn get_state(&self) -> MessageState {
         self.state

src/param.rs

@@ -187,6 +187,9 @@ pub enum Param {
 
     /// For Webxdc Message Instances: timestamp of summary update.
     WebxdcSummaryTimestamp = b'Q',
+
+    /// For messages: Whether [crate::message::Viewtype::Sticker] should be forced.
+    ForceSticker = b'X',
 }
 
 /// An object for handling key=value parameter lists.