# Action System Integration Progress
## Phase 2 Completed: Navigation Key Extraction ✓
### What We've Done
1. **Integrated Action System into TUI**
- Added `KeyMapper` instance to `EnhancedTuiApp`
- Created `build_action_context()` to gather current state
- Created `try_handle_action()` to process actions
- Added integration point in `handle_results_input()` that tries action system first
2. **Extracted Navigation Actions**
- Arrow keys (Up, Down, Left, Right)
- Vim navigation (h, j, k, l)
- Page navigation (PageUp, PageDown)
- Jump navigation (Home, End, first/last column)
- Vim-style counts (e.g., 5j moves down 5 rows)
3. **Extracted Mode & UI Actions**
- Toggle selection mode (v key)
- Show help (F1)
- Show debug info (F5)
- Quit (q)
- Force quit (Ctrl+C)
4. **Extracted Data Operations**
- Toggle column pin (p)
- Sort by current column (s)
- Exit current mode (Esc)
### How It Works
1. When a key is pressed in Results mode:
- First tries to map through `KeyMapper` to get an `Action`
- If mapped, tries to handle through `try_handle_action()`
- If handled, returns immediately
- If not handled, falls back to legacy key handling
2. The `KeyMapper`:
- Maps keys to actions based on current mode
- Supports vim-style count prefixes (5j, 10k, etc.)
- Has global mappings (F1, F5, Ctrl+C) that work in any mode
- Has mode-specific mappings (navigation in Results mode)
3. The action handler:
- Takes an `Action` enum value
- Executes the appropriate TUI method
- Returns `ActionResult` to indicate success/failure
### Benefits So Far
1. **Cleaner separation** - Key mapping logic separated from action execution
2. **Vim-style counts** - Now support 5j, 10k, etc. for efficient navigation
3. **Testable** - Actions can be tested independently of key handling
4. **Customizable** - Key mappings can be easily changed in one place
5. **Non-breaking** - All existing functionality preserved through fallback
### Phase 3 Completed: Visitor Pattern Migration ✓
We've successfully migrated several groups of actions to the visitor pattern:
1. **Toggle Actions** (`ToggleActionHandler`)
- ToggleSelectionMode - Switch between cell/row/column selection
- ToggleRowNumbers - Show/hide row numbers
- ToggleCompactMode - Enable/disable compact display
- ToggleCaseInsensitive - Toggle case-insensitive comparisons
- ToggleKeyIndicator - Show/hide key press indicator
2. **Clear Actions** (`ClearActionHandler`)
- ClearFilter - Remove active filter
- ClearLine - Clear command line (context-aware for Command mode)
3. **Exit Actions** (`ExitActionHandler`)
- Quit - Normal application exit
- ForceQuit - Force quit (Ctrl+C)
These join the existing handlers:
- NavigationActionHandler (arrow keys, vim navigation, page navigation)
- ColumnActionHandler (pin, hide, unhide columns)
- ExportActionHandler (CSV, JSON export)
- YankActionHandler (yank cell, row, column, all, query)
- UIActionHandler (show help, debug info)
### Next Steps
1. **Remove duplicate handling** - Navigation keys are now handled twice (action system + legacy)
2. **Extract more complex actions**:
- Search operations (StartSearch, StartColumnSearch, StartFilter)
- Viewport navigation (NavigateToViewportTop/Middle/Bottom)
- Mode transitions (StartJumpToRow, etc.)
- Editing keys (text input, backspace, etc.)
3. **Move to reducer pattern** - Convert action handlers to pure functions
4. **Add key customization** - Load custom key mappings from config
### Testing
To verify the action system is working:
```bash
# Build and run with a test file
cargo build
echo "a,b\n1,2\n3,4" > test.csv
./target/debug/sql-cli test.csv -e "select * from data"
# Try these keys - status bar will show "✓ Action system handled: <key>"
# j, k, h, l - navigation
# 5j - move down 5 rows
# v - toggle selection mode
# p - pin column
# s - sort
# F1 - help
# q - quit
```
### Files Modified
- `src/ui/enhanced_tui.rs` - Added integration point and action handler
- `src/ui/actions.rs` - Action enum and types (already existed)
- `src/ui/key_mapper.rs` - Key to action mapping (already existed)
### Metrics
- **Keys extracted**: ~20 key combinations
- **Lines of legacy code that can be removed**: ~200-300 (not removed yet)
- **New code added**: ~100 lines (integration points)
- **Behavior changes**: None - 100% backward compatible