Allow drafts without text if there is a quote

src/chat.rs

@@ -315,14 +315,11 @@ impl ChatId {
     async fn do_set_draft(self, context: &Context, msg: &mut Message) -> Result<(), Error> {
         match msg.viewtype {
             Viewtype::Unknown => bail!("Can not set draft of unknown type."),
-            Viewtype::Text => match msg.text.as_ref() {
-                Some(text) => {
-                    if text.is_empty() {
-                        bail!("No text in draft");
-                    }
+            Viewtype::Text => {
+                if msg.text.is_none_or_empty() && msg.in_reply_to.is_none_or_empty() {
+                    bail!("No text and no quote in draft");
                 }
-                None => bail!("No text in draft"),
-            },
+            }
             _ => {
                 let blob = msg
                     .param
@@ -346,7 +343,7 @@ impl ChatId {
                     msg.text.as_deref().unwrap_or(""),
                     msg.param.to_string(),
                     1,
-                    msg.in_reply_to,
+                    msg.in_reply_to.as_deref().unwrap_or_default(),
                 ],
             )
             .await?;

src/dc_tools.rs

@@ -709,6 +709,21 @@ pub(crate) fn improve_single_line_input(input: impl AsRef<str>) -> String {
         .to_string()
 }
 
+pub(crate) trait IsNoneOrEmpty<T> {
+    fn is_none_or_empty(&self) -> bool;
+}
+impl<T> IsNoneOrEmpty<T> for Option<T>
+where
+    T: AsRef<str>,
+{
+    fn is_none_or_empty(&self) -> bool {
+        match self {
+            Some(s) if !s.as_ref().is_empty() => false,
+            _ => true,
+        }
+    }
+}
+
 #[cfg(test)]
 mod tests {
     #![allow(clippy::indexing_slicing)]