# TASK-007I: Data Browser Panel - COMPLETE

## Summary

Implemented a full-featured data browser panel for viewing and editing records in local backend SQLite tables, providing a spreadsheet-like interface with inline editing, search, pagination, and CRUD operations.

## Status: ✅ Complete

## Date: 2026-01-15

---

## What Was Implemented

### 1. Backend IPC Handlers (BackendManager.js)

Added four new IPC handlers for data operations:

- **`backend:queryRecords`** - Query records with pagination, sorting, search filters
- **`backend:createRecord`** - Create a new record in a table
- **`backend:saveRecord`** - Update an existing record (inline edit)
- **`backend:deleteRecord`** - Delete a single record

These handlers wrap the existing LocalSQLAdapter CRUD methods (query, create, save, delete) and expose them to the renderer process.

### 2. DataBrowser Component (`panels/databrowser/`)

Created a complete data browser panel with the following components:

#### DataBrowser.tsx (Main Component)

- Table selector dropdown
- Search input with cross-field text search
- Pagination with page navigation (50 records per page)
- Bulk selection and delete operations
- CSV export functionality
- Loading states and error handling
- New record modal trigger

#### DataGrid.tsx (Spreadsheet View)

- Column headers with type badges (String, Number, Boolean, Date, Object, Array)
- System columns (objectId, createdAt, updatedAt) displayed as read-only
- Inline editing - click any editable cell to edit
- Row selection with checkbox
- Select all/none toggle
- Delete action per row
- Scrollable with sticky header

#### CellEditor.tsx (Inline Editor)

- Type-aware input controls:
  - **String**: Text input
  - **Number**: Number input with step="any"
  - **Boolean**: Checkbox with immediate save
  - **Date**: datetime-local input
  - **Object/Array**: Multi-line JSON editor with Save/Cancel buttons
- Auto-focus and select on mount
- Enter to save, Escape to cancel (for simple types)
- Validation for numbers and JSON parsing
- Error display for invalid input

#### NewRecordModal.tsx (Create Record Form)

- Form fields generated from column schema
- Type-aware input controls for each field type
- Required field validation
- Default values based on column defaults or type defaults
- Success callback to refresh data grid

### 3. Styling

All components use theme CSS variables per UI-STYLING-GUIDE.md:

- `--theme-color-bg-*` for backgrounds
- `--theme-color-fg-*` for text
- `--theme-color-border-*` for borders
- `--theme-color-primary*` for accents
- `--theme-color-success/danger/notice` for status colors

### 4. Integration

Added "Data" button to LocalBackendCard (visible when backend is running):

- Opens DataBrowser in a full-screen portal overlay
- Same pattern as Schema panel

---

## Files Created/Modified

### Created Files:

```
packages/noodl-editor/src/editor/src/views/panels/databrowser/
├── DataBrowser.tsx           - Main data browser component
├── DataBrowser.module.scss   - Styles for DataBrowser
├── DataGrid.tsx              - Spreadsheet grid component
├── DataGrid.module.scss      - Styles for DataGrid
├── CellEditor.tsx            - Inline cell editor
├── CellEditor.module.scss    - Styles for CellEditor
├── NewRecordModal.tsx        - Create record modal
├── NewRecordModal.module.scss - Styles for modal
└── index.ts                  - Exports
```

### Modified Files:

```
packages/noodl-editor/src/main/src/local-backend/BackendManager.js
  - Added queryRecords(), createRecord(), saveRecord(), deleteRecord() methods
  - Added corresponding IPC handlers

packages/noodl-editor/src/editor/src/views/panels/BackendServicesPanel/LocalBackendCard/LocalBackendCard.tsx
  - Added DataBrowser import
  - Added showDataBrowser state
  - Added "Data" button
  - Added DataBrowser portal rendering
```

---

## How To Use

1. Start a local backend from the Backend Services panel
2. Click the "Data" button on the running backend card
3. Select a table from the dropdown (auto-selects first table if available)
4. Browse records with pagination
5. Click any editable cell to edit inline
6. Use "+ New Record" to add records
7. Use checkboxes for bulk selection and delete
8. Use "Export CSV" to download current view

---

## Technical Notes

### Query API

The query API supports:

```javascript
{
  collection: string,    // Table name
  limit: number,         // Max records (default 50)
  skip: number,          // Pagination offset
  where: object,         // Filter conditions ($or, contains, etc.)
  sort: string[],        // Sort order (e.g., ['-createdAt'])
  count: boolean         // Return total count for pagination
}
```

### Search Implementation

Search uses `$or` with `contains` operator across all String columns and objectId. The LocalSQLAdapter converts this to SQLite LIKE queries.

### Type Handling

- System fields (objectId, createdAt, updatedAt) are always read-only
- Boolean cells save immediately on checkbox toggle
- Object/Array cells require explicit Save button due to JSON editing
- Dates are stored as ISO8601 strings

---

## Future Improvements (Not in scope)

- Column sorting by clicking headers
- Filter by specific field values
- Relation/Pointer field expansion
- Inline record duplication
- Undo for delete operations
- Import CSV/JSON

---

## Verification Checklist

- [x] IPC handlers added to BackendManager.js
- [x] DataBrowser component created
- [x] DataGrid with inline editing
- [x] CellEditor with type-aware controls
- [x] NewRecordModal for creating records
- [x] CSV export functionality
- [x] Pagination working
- [x] Search functionality
- [x] Bulk delete operations
- [x] Integration with LocalBackendCard
- [x] Theme-compliant styling
- [x] No hardcoded colors
- [x] JSDoc comments added

---

## Related Tasks

- **TASK-007A**: Core SQLite adapter ✅
- **TASK-007B**: Workflow integration ✅
- **TASK-007C**: Schema management ✅
- **TASK-007D**: Backend lifecycle ✅
- **TASK-007E**: Express HTTP API ✅
- **TASK-007F**: Node integration ✅
- **TASK-007G**: UI components ✅
- **TASK-007H**: Schema Panel UI ✅
- **TASK-007I**: Data Browser ✅ (this task)