feat: update UI for reply w/ Reviewed-by to subset of patches

Update the UI for the changes introduced by the two last commits.

This results in the button "[x] reviewed-by" in the "Actions" tab having
a display (in the right side) of the number of the patches that are
staged in gray, e.g., if the patches 1, 2, and 7 are staged, the button
will look like

```
[x] reviewed-by (1,2,7)
```

Signed-off-by: David Tadokoro <[email protected]>

src/app.rs

@@ -153,12 +153,14 @@ impl App {
                         .into_text()?;
                     patches_preview.push(patch_preview);
                 }
+                let has_cover_letter = representative_patch.number_in_series() == 0;
                 let patches_to_reply = vec![false; raw_patches.len()];
                 self.patchset_details_and_actions_state = Some(PatchsetDetailsAndActionsState {
                     representative_patch,
                     raw_patches,
                     patches_preview,
                     patches_to_reply,
+                    has_cover_letter,
                     preview_index: 0,
                     preview_scroll_offset: 0,
                     preview_pan: 0,

src/app/screens/details_actions.rs

@@ -14,6 +14,8 @@ pub struct PatchsetDetailsAndActionsState {
     pub raw_patches: Vec<String>,
     /// Patches in the format to be displayed as preview
     pub patches_preview: Vec<Text<'static>>,
+    /// Indicates if patchset has a cover letter
+    pub has_cover_letter: bool,
     /// Which patches to reply
     pub patches_to_reply: Vec<bool>,
     pub preview_index: usize,

src/ui/details_actions.rs

@@ -63,6 +63,29 @@ fn render_details_and_actions(f: &mut Frame, app: &App, details_chunk: Rect, act
 
     f.render_widget(patchset_details, details_chunk);
 
+    let mut patches_to_reply = String::new();
+    if let Some(true) = patchset_details_and_actions
+        .patchset_actions
+        .get(&PatchsetAction::ReplyWithReviewedBy)
+    {
+        patches_to_reply.push('(');
+        let number_offset = if patchset_details_and_actions.has_cover_letter {
+            0
+        } else {
+            1
+        };
+        let patches_to_reply_numbers: Vec<usize> = patchset_details_and_actions
+            .patches_to_reply
+            .iter()
+            .enumerate()
+            .filter_map(|(i, &val)| if val { Some(i + number_offset) } else { None })
+            .collect();
+        for number in patches_to_reply_numbers {
+            patches_to_reply.push_str(&format!("{number},"));
+        }
+        patches_to_reply = format!("{})", &patches_to_reply[..patches_to_reply.len() - 1]);
+    }
+
     let patchset_actions = &patchset_details_and_actions.patchset_actions;
     let patchset_actions = vec![
         Line::from(vec![
@@ -81,8 +104,9 @@ fn render_details_and_actions(f: &mut Frame, app: &App, details_chunk: Rect, act
             Span::styled("ookmark", Style::default().fg(Color::Cyan)),
         ]),
         Line::from(vec![
-            if *patchset_actions
-                .get(&PatchsetAction::ReplyWithReviewedBy)
+            if *patchset_details_and_actions
+                .patches_to_reply
+                .get(patchset_details_and_actions.preview_index)
                 .unwrap()
             {
                 Span::styled("[x] ", Style::default().fg(Color::Green))
@@ -96,7 +120,8 @@ fn render_details_and_actions(f: &mut Frame, app: &App, details_chunk: Rect, act
                     .add_modifier(Modifier::UNDERLINED)
                     .add_modifier(Modifier::BOLD),
             ),
-            Span::styled("eviewed-by", Style::default().fg(Color::Cyan)),
+            Span::styled("eviewed-by ", Style::default().fg(Color::Cyan)),
+            Span::styled(patches_to_reply, Style::default().fg(Color::DarkGray)),
         ]),
     ];
     let patchset_actions = Paragraph::new(patchset_actions)
@@ -122,10 +147,17 @@ fn render_preview(f: &mut Frame, app: &App, chunk: Rect) {
         .message_id()
         .href;
     let mut preview_title = String::from(" Preview ");
-    if let Some(successful_indexes) = app.reviewed_patchsets.get(representative_patch_message_id) {
-        if successful_indexes.contains(&preview_index) {
-            preview_title = " Preview [REVIEWED] ".to_string();
-        }
+    if matches!(
+        app.reviewed_patchsets.get(representative_patch_message_id),
+        Some(successful_indexes) if successful_indexes.contains(&preview_index)
+    ) {
+        preview_title = " Preview [REVIEWED-BY] ".to_string();
+    } else if *patchset_details_and_actions
+        .patches_to_reply
+        .get(preview_index)
+        .unwrap()
+    {
+        preview_title = " Preview [REVIEWED-BY]* ".to_string();
     };
 
     let preview_offset = patchset_details_and_actions.preview_scroll_offset;