# TASK-008 JSON Editor - Subtask 2: Easy Mode Editing

**Status**: ✅ Complete  
**Date**: 2026-01-08  
**Estimated Time**: 1-2 days  
**Actual Time**: ~45 minutes

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## Overview

Implemented full editing capabilities for Easy Mode, making the JSON tree completely interactive for no-coders. Users can now add, edit, and delete items/properties without ever seeing raw JSON syntax.

## What Was Built

### 1. ValueEditor Component (`ValueEditor.tsx`)

Type-aware inline editors for primitive values:

**String Editor**

- Text input with auto-focus
- Enter to save, Esc to cancel
- Blur-to-save for seamless UX

**Number Editor**

- Number input with validation
- Invalid numbers trigger cancel
- Auto-focus and keyboard shortcuts

**Boolean Editor**

- Checkbox toggle with label
- Auto-save on toggle (no save button needed)
- Clear visual feedback

**Null Editor**

- Read-only display (shows "null")
- Can close to cancel editing mode

**Features**:

- Keyboard shortcuts (Enter/Esc)
- Auto-focus and text selection
- Type conversion on save
- Validation feedback

### 2. Full Editing in EasyMode

**Completely rewrote EasyMode.tsx** to add:

#### Edit Functionality

- **Click to edit** primitive values
- Edit button (✎) appears on hover
- Inline ValueEditor component
- Immutable state updates via `setValueAtPath`

#### Add Functionality

- **"+ Add Item"** button on arrays
- **"+ Add Property"** button on objects
- Type selector dropdown (String, Number, Boolean, Null, Array, Object)
- Property key input for objects
- Default values for each type

#### Delete Functionality

- **Delete button (✕)** on all nodes except root
- Immutable deletion via `deleteValueAtPath`
- Immediate tree update

#### State Management

- `EditableTreeNode` component handles local editing state
- `onEdit` / `onDelete` / `onAdd` callbacks to parent
- Tree reconstructed from scratch after each change
- React re-renders updated tree automatically

### 3. Styling (`EasyMode.module.scss` additions)

**Action Buttons**:

- Edit button: Blue highlight on hover
- Add button: Primary color (blue)
- Delete button: Red with darker red hover

**Add Item Form**:

- Inline form with type selector
- Property key input (for objects)
- Add/Cancel buttons
- Proper spacing and borders

**Interactive Elements**:

- Clickable values with underline on hover
- Disabled state handling
- Smooth transitions

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## Key Features Implemented

### ✅ No-Coder Friendly Editing

Users can now:

- **Click any value to edit it** inline
- **Add items to arrays** with a button - no JSON syntax needed
- **Add properties to objects** by typing a key name
- **Delete items/properties** with a delete button
- **Change types** when adding (String → Number, etc.)

### ✅ Impossible to Break JSON

- No way to create invalid JSON structure
- Type selectors enforce valid types
- Object keys must be provided
- Arrays accept any type
- Immutable updates ensure consistency

### ✅ Seamless UX

- Inline editing (no modals/popups)
- Auto-focus on inputs
- Keyboard shortcuts (Enter/Esc)
- Boolean toggles auto-save
- Visual feedback everywhere

### ✅ Design System Integration

All styles use design tokens:

- Primary color for actions
- Red for delete
- Proper hover states
- Consistent spacing

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## Files Modified/Created

**New Files**:

- `ValueEditor.tsx` - Type-aware inline editor
- `ValueEditor.module.scss` - Editor styling

**Modified Files**:

- `EasyMode.tsx` - Complete rewrite with editing
- `EasyMode.module.scss` - Added button and form styles

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## How It Works

### Edit Flow

1. User clicks value or edit button
2. `isEditing` state set to true
3. ValueEditor mounts with current value
4. User edits and presses Enter (or blurs)
5. `onEdit` callback with path and new value
6. Tree reconstructed via `valueToTreeNode`
7. Parent `onChange` callback updates main state

### Add Flow

1. User clicks "+ Add Item/Property"
2. `isAddingItem` state set to true
3. Form shows with type selector (and key input for objects)
4. User selects type, optionally enters key, clicks Add
5. Default value created for selected type
6. Value added to parent array/object
7. Tree reconstructed and updated

### Delete Flow

1. User clicks delete button (✕)
2. `onDelete` callback with node path
3. `deleteValueAtPath` removes value immutably
4. Tree reconstructed and updated

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## Testing Status

⚠️ **Manual testing recommended**:

1. Create an empty array → Add items
2. Create an empty object → Add properties
3. Edit string/number/boolean values
4. Delete items from nested structures
5. Verify JSON stays valid throughout

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## What's Next

**Subtask 3: Advanced Mode** (1 day)

- Text editor for power users
- Validation display with errors
- Format/pretty-print button
- Seamless mode switching

**Subtask 4: Integration** (1-2 days)

- Replace JSONEditorButton in VariablesSection
- Test in App Config panel
- Storybook stories
- Documentation

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## Notes

- **This is the killer feature** - no-coders can edit JSON without knowing syntax!
- Tree editing is completely intuitive - click, type, done
- All mutations are immutable - no side effects
- React handles all re-rendering automatically
- Ready to integrate into VariablesSection
