feat: TUI Phase 1 common widgets + scoring/path beads

crates/lore-tui/src/state/mod.rs

@@ -0,0 +1,335 @@
+#![allow(dead_code)] // Phase 1: consumed by LoreApp in bd-6pmy
+
+//! Top-level state composition for the TUI.
+//!
+//! Each screen has its own state struct. State is preserved when
+//! navigating away — screens are never cleared on pop.
+//!
+//! [`LoadState`] enables stale-while-revalidate: screens show the last
+//! available data during a refresh, with a spinner indicating the load.
+//!
+//! [`ScreenIntent`] is the pure return type from state handlers — they
+//! never spawn async tasks directly. The intent is interpreted by
+//! [`LoreApp`](crate::app::LoreApp) which dispatches through the
+//! [`TaskSupervisor`](crate::task_supervisor::TaskSupervisor).
+
+pub mod command_palette;
+pub mod dashboard;
+pub mod issue_detail;
+pub mod issue_list;
+pub mod mr_detail;
+pub mod mr_list;
+pub mod search;
+pub mod sync;
+pub mod timeline;
+pub mod who;
+
+use std::collections::HashMap;
+
+use crate::message::Screen;
+
+// Re-export screen states for convenience.
+pub use command_palette::CommandPaletteState;
+pub use dashboard::DashboardState;
+pub use issue_detail::IssueDetailState;
+pub use issue_list::IssueListState;
+pub use mr_detail::MrDetailState;
+pub use mr_list::MrListState;
+pub use search::SearchState;
+pub use sync::SyncState;
+pub use timeline::TimelineState;
+pub use who::WhoState;
+
+// ---------------------------------------------------------------------------
+// LoadState
+// ---------------------------------------------------------------------------
+
+/// Loading state for a screen's data.
+///
+/// Enables stale-while-revalidate: screens render their last data while
+/// showing a spinner when `Refreshing`.
+#[derive(Debug, Clone, PartialEq, Eq, Default)]
+pub enum LoadState {
+    /// No load in progress, data is current (or screen was never loaded).
+    #[default]
+    Idle,
+    /// First load — no data to show yet, display a full-screen spinner.
+    LoadingInitial,
+    /// Background refresh — show existing data with a spinner indicator.
+    Refreshing,
+    /// Load failed — display the error alongside any stale data.
+    Error(String),
+}
+
+impl LoadState {
+    /// Whether data is currently being loaded.
+    #[must_use]
+    pub fn is_loading(&self) -> bool {
+        matches!(self, Self::LoadingInitial | Self::Refreshing)
+    }
+}
+
+// ---------------------------------------------------------------------------
+// ScreenLoadStateMap
+// ---------------------------------------------------------------------------
+
+/// Tracks per-screen load state.
+///
+/// Returns [`LoadState::Idle`] for screens that haven't been tracked.
+/// Automatically removes entries set to `Idle` to prevent unbounded growth.
+#[derive(Debug, Default)]
+pub struct ScreenLoadStateMap {
+    map: HashMap<Screen, LoadState>,
+}
+
+impl ScreenLoadStateMap {
+    /// Get the load state for a screen (defaults to `Idle`).
+    #[must_use]
+    pub fn get(&self, screen: &Screen) -> &LoadState {
+        static IDLE: LoadState = LoadState::Idle;
+        self.map.get(screen).unwrap_or(&IDLE)
+    }
+
+    /// Set the load state for a screen.
+    ///
+    /// Setting to `Idle` removes the entry to prevent map growth.
+    pub fn set(&mut self, screen: Screen, state: LoadState) {
+        if state == LoadState::Idle {
+            self.map.remove(&screen);
+        } else {
+            self.map.insert(screen, state);
+        }
+    }
+
+    /// Whether any screen is currently loading.
+    #[must_use]
+    pub fn any_loading(&self) -> bool {
+        self.map.values().any(LoadState::is_loading)
+    }
+}
+
+// ---------------------------------------------------------------------------
+// ScreenIntent
+// ---------------------------------------------------------------------------
+
+/// Pure return type from screen state handlers.
+///
+/// State handlers must never spawn async work directly — they return
+/// an intent that [`LoreApp`] interprets and dispatches through the
+/// [`TaskSupervisor`].
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum ScreenIntent {
+    /// No action needed.
+    None,
+    /// Navigate to a new screen.
+    Navigate(Screen),
+    /// Screen data needs re-querying (e.g., filter changed).
+    RequeryNeeded(Screen),
+}
+
+// ---------------------------------------------------------------------------
+// ScopeContext
+// ---------------------------------------------------------------------------
+
+/// Global scope filters applied across all screens.
+///
+/// When a project filter is active, all data queries scope to that
+/// project. The TUI shows the active scope in the status bar.
+#[derive(Debug, Default)]
+pub struct ScopeContext {
+    /// Active project filter (project_id).
+    pub project_id: Option<i64>,
+    /// Human-readable project name for display.
+    pub project_name: Option<String>,
+}
+
+// ---------------------------------------------------------------------------
+// AppState
+// ---------------------------------------------------------------------------
+
+/// Top-level state composition for the TUI.
+///
+/// Each field holds one screen's state. State is preserved when
+/// navigating away and restored on return.
+#[derive(Debug, Default)]
+pub struct AppState {
+    // Per-screen states.
+    pub dashboard: DashboardState,
+    pub issue_list: IssueListState,
+    pub issue_detail: IssueDetailState,
+    pub mr_list: MrListState,
+    pub mr_detail: MrDetailState,
+    pub search: SearchState,
+    pub timeline: TimelineState,
+    pub who: WhoState,
+    pub sync: SyncState,
+    pub command_palette: CommandPaletteState,
+
+    // Cross-cutting state.
+    pub global_scope: ScopeContext,
+    pub load_state: ScreenLoadStateMap,
+    pub error_toast: Option<String>,
+    pub show_help: bool,
+    pub terminal_size: (u16, u16),
+}
+
+impl AppState {
+    /// Set a screen's load state.
+    pub fn set_loading(&mut self, screen: Screen, state: LoadState) {
+        self.load_state.set(screen, state);
+    }
+
+    /// Set the global error toast.
+    pub fn set_error(&mut self, msg: String) {
+        self.error_toast = Some(msg);
+    }
+
+    /// Clear the global error toast.
+    pub fn clear_error(&mut self) {
+        self.error_toast = None;
+    }
+
+    /// Whether any text input is currently focused.
+    #[must_use]
+    pub fn has_text_focus(&self) -> bool {
+        self.issue_list.filter_focused
+            || self.mr_list.filter_focused
+            || self.search.query_focused
+            || self.command_palette.query_focused
+    }
+
+    /// Remove focus from all text inputs.
+    pub fn blur_text_focus(&mut self) {
+        self.issue_list.filter_focused = false;
+        self.mr_list.filter_focused = false;
+        self.search.query_focused = false;
+        self.command_palette.query_focused = false;
+    }
+}
+
+// ---------------------------------------------------------------------------
+// Tests
+// ---------------------------------------------------------------------------
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_load_state_default_idle() {
+        let map = ScreenLoadStateMap::default();
+        assert_eq!(*map.get(&Screen::Dashboard), LoadState::Idle);
+        assert_eq!(*map.get(&Screen::IssueList), LoadState::Idle);
+    }
+
+    #[test]
+    fn test_load_state_set_and_get() {
+        let mut map = ScreenLoadStateMap::default();
+        map.set(Screen::Dashboard, LoadState::LoadingInitial);
+        assert_eq!(*map.get(&Screen::Dashboard), LoadState::LoadingInitial);
+        assert_eq!(*map.get(&Screen::IssueList), LoadState::Idle);
+    }
+
+    #[test]
+    fn test_load_state_set_idle_removes_entry() {
+        let mut map = ScreenLoadStateMap::default();
+        map.set(Screen::Dashboard, LoadState::Refreshing);
+        assert_eq!(map.map.len(), 1);
+
+        map.set(Screen::Dashboard, LoadState::Idle);
+        assert_eq!(map.map.len(), 0);
+        assert_eq!(*map.get(&Screen::Dashboard), LoadState::Idle);
+    }
+
+    #[test]
+    fn test_any_loading() {
+        let mut map = ScreenLoadStateMap::default();
+        assert!(!map.any_loading());
+
+        map.set(Screen::Dashboard, LoadState::LoadingInitial);
+        assert!(map.any_loading());
+
+        map.set(Screen::Dashboard, LoadState::Error("oops".into()));
+        assert!(!map.any_loading());
+    }
+
+    #[test]
+    fn test_load_state_is_loading() {
+        assert!(!LoadState::Idle.is_loading());
+        assert!(LoadState::LoadingInitial.is_loading());
+        assert!(LoadState::Refreshing.is_loading());
+        assert!(!LoadState::Error("x".into()).is_loading());
+    }
+
+    #[test]
+    fn test_app_state_default_compiles() {
+        let state = AppState::default();
+        assert!(!state.show_help);
+        assert!(state.error_toast.is_none());
+        assert_eq!(state.terminal_size, (0, 0));
+    }
+
+    #[test]
+    fn test_app_state_set_error_and_clear() {
+        let mut state = AppState::default();
+        state.set_error("db busy".into());
+        assert_eq!(state.error_toast.as_deref(), Some("db busy"));
+
+        state.clear_error();
+        assert!(state.error_toast.is_none());
+    }
+
+    #[test]
+    fn test_app_state_has_text_focus() {
+        let mut state = AppState::default();
+        assert!(!state.has_text_focus());
+
+        state.search.query_focused = true;
+        assert!(state.has_text_focus());
+    }
+
+    #[test]
+    fn test_app_state_blur_text_focus() {
+        let mut state = AppState::default();
+        state.issue_list.filter_focused = true;
+        state.mr_list.filter_focused = true;
+        state.search.query_focused = true;
+        state.command_palette.query_focused = true;
+
+        state.blur_text_focus();
+
+        assert!(!state.has_text_focus());
+        assert!(!state.issue_list.filter_focused);
+        assert!(!state.mr_list.filter_focused);
+        assert!(!state.search.query_focused);
+        assert!(!state.command_palette.query_focused);
+    }
+
+    #[test]
+    fn test_app_state_set_loading() {
+        let mut state = AppState::default();
+        state.set_loading(Screen::IssueList, LoadState::Refreshing);
+        assert_eq!(
+            *state.load_state.get(&Screen::IssueList),
+            LoadState::Refreshing
+        );
+    }
+
+    #[test]
+    fn test_screen_intent_variants() {
+        let none = ScreenIntent::None;
+        let nav = ScreenIntent::Navigate(Screen::IssueList);
+        let requery = ScreenIntent::RequeryNeeded(Screen::Search);
+
+        assert_eq!(none, ScreenIntent::None);
+        assert_eq!(nav, ScreenIntent::Navigate(Screen::IssueList));
+        assert_eq!(requery, ScreenIntent::RequeryNeeded(Screen::Search));
+    }
+
+    #[test]
+    fn test_scope_context_default() {
+        let scope = ScopeContext::default();
+        assert!(scope.project_id.is_none());
+        assert!(scope.project_name.is_none());
+    }
+}