allow filtering group by menu

src/grouping/mod.rs

@@ -198,6 +198,13 @@ impl GroupingOptions {
         .into_iter()
     }
 
+    pub fn matches(&self, filter: &str) -> bool {
+        if filter.is_empty() {
+            return true;
+        }
+        self.as_str().to_ascii_lowercase().contains(filter)
+    }
+
     pub fn group_key(&self, line: &LogLine) -> Option<u64> {
         let mut hasher = AHasher::default();
         match self {

src/ui/mod.rs

@@ -165,6 +165,7 @@ fn ui(frame: &mut Frame, app: &App, state: &mut UiState) {
             options,
             previous,
             list_state,
+            filter,
             ..
         }) => {
             ui(frame, app, previous);
@@ -173,8 +174,18 @@ fn ui(frame: &mut Frame, app: &App, state: &mut UiState) {
                 Constraint::Percentage(20),
                 Constraint::Length(options.len() as u16 + 2), // top and bottom border + content
             );
-            let popup = SelectList::new(options.iter().map(|option| option.as_str()))
-                .block(Block::bordered().title("Group By"));
+            let mut block = Block::bordered().title("Group By");
+            if !filter.is_empty() {
+                block = block.title_bottom(filter.as_str());
+            }
+
+            let popup = SelectList::new(
+                options
+                    .iter()
+                    .filter(|o| o.matches(filter))
+                    .map(|option| option.as_str()),
+            )
+            .block(block);
             frame.render_widget(Clear, area);
             frame.render_stateful_widget(popup, area, list_state);
         }

src/ui/state.rs

@@ -35,6 +35,7 @@ impl<'a> UiState<'a> {
                     previous: Some(_),
                     ..
                 })
+                | UiState::GroupByMenu(_)
                 | UiState::Distinct(DistinctLogsState { .. })
                 | UiState::Log(LogState { .. })
                 | UiState::Errors(ErrorLinesState { .. })
@@ -112,6 +113,7 @@ pub struct GroupByMenuState<'a> {
     pub previous: Box<UiState<'a>>,
     pub list_state: SizedListState,
     pub next: UiPage,
+    pub filter: String,
 }
 
 impl PartialEq for GroupByMenuState<'_> {
@@ -126,7 +128,16 @@ impl<'a> GroupByMenuState<'a> {
     }
 
     pub fn enter(self, selected: usize) -> UiState<'a> {
-        let group_option = self.options[selected];
+        let Some(group_option) = self
+            .options
+            .iter()
+            .filter(|o| o.matches(&self.filter))
+            .copied()
+            .nth(selected)
+        else {
+            return self.into();
+        };
+
         let lines = match self.previous.as_ref() {
             UiState::Group(group) => &group.result.lines.lines,
             UiState::Distinct(group) => &group.lines,
@@ -166,6 +177,7 @@ impl<'a> GroupState<'a> {
             previous: Box::new(self.into()),
             list_state: SizedListState::new(GroupingOptions::all().count()),
             next: UiPage::Group,
+            filter: String::new(),
         })
     }
 
@@ -248,6 +260,7 @@ impl<'a> DistinctLogsState<'a> {
             previous: Box::new(self.into()),
             list_state: SizedListState::new(GroupingOptions::all().count()),
             next: UiPage::DistinctLogs,
+            filter: String::new(),
         })
     }
 
@@ -382,6 +395,7 @@ impl<'a> UiState<'a> {
         match self {
             UiState::GroupList(state) => state.mode,
             UiState::Group(state) => state.mode,
+            UiState::GroupByMenu(_) => Mode::FilterInput,
             UiState::Distinct(state) => state.mode,
             _ => Mode::Normal,
         }
@@ -578,6 +592,17 @@ impl<'a> UiState<'a> {
                 let selected = state.selected();
                 (true, state.enter(selected))
             }
+            (UiState::GroupByMenu(mut state), UiEvent::Text(c)) => {
+                state.filter.push(c);
+                (true, state.into())
+            }
+            (UiState::GroupByMenu(mut state), UiEvent::PopText(PopMode::Character)) => {
+                state.filter.pop();
+                (true, state.into())
+            }
+            (UiState::GroupByMenu(GroupByMenuState { previous, .. }), UiEvent::ClearFilter) => {
+                (true, *previous)
+            }
             (UiState::Distinct(state), UiEvent::Select) => {
                 let selected = state.selected();
                 (true, state.enter(selected, app))