# Accessibility Code Fixes - Detailed Implementation Guide

## Fix #1: File Upload Input aria-label

**File**: `apps/web/components/listings/image-upload.tsx`  
**Line**: 118

### Before
```tsx
<input
  ref={inputRef}
  type="file"
  accept="image/jpeg,image/png,image/webp"
  multiple
  className="hidden"
  onChange={(e) => {
    if (e.target.files) addFiles(e.target.files);
    e.target.value = '';
  }}
/>
```

### After
```tsx
<input
  ref={inputRef}
  type="file"
  accept="image/jpeg,image/png,image/webp"
  multiple
  className="hidden"
  aria-label="Chọn ảnh để tải lên"
  onChange={(e) => {
    if (e.target.files) addFiles(e.target.files);
    e.target.value = '';
  }}
/>
```

**Why**: Hidden inputs need aria-label so screen readers can announce their purpose when focused.

---

## Fix #2: Search Dialog Input aria-label

**File**: `apps/web/app/[locale]/(public)/search/page.tsx`  
**Line**: 189

### Before
```tsx
<input
  type="text"
  value={saveName}
  onChange={(e) => setSaveName(e.target.value)}
  placeholder="Tên tìm kiếm (VD: Chung cư Q7 dưới 3 tỷ)"
  className="mb-3 w-full rounded-md border bg-background px-3 py-2 text-sm outline-none focus:ring-2 focus:ring-primary"
  maxLength={100}
  onKeyDown={(e) => e.key === 'Enter' && handleSaveSearch()}
/>
```

### After
```tsx
<input
  type="text"
  value={saveName}
  onChange={(e) => setSaveName(e.target.value)}
  placeholder="Tên tìm kiếm (VD: Chung cư Q7 dưới 3 tỷ)"
  aria-label="Tên bộ lọc tìm kiếm"
  className="mb-3 w-full rounded-md border bg-background px-3 py-2 text-sm outline-none focus:ring-2 focus:ring-primary"
  maxLength={100}
  onKeyDown={(e) => e.key === 'Enter' && handleSaveSearch()}
/>
```

**Why**: Text inputs need aria-label when no associated label element exists. Placeholder is not a substitute for aria-label.

---

## Fix #3: Admin Moderation - Select All Checkbox

**File**: `apps/web/app/[locale]/(admin)/admin/moderation/page.tsx`  
**Line**: 222

### Before
```tsx
<TableHead className="w-10">
  <input
    type="checkbox"
    checked={selected.size === result.data.length && result.data.length > 0}
    onChange={toggleSelectAll}
    className="rounded border-input"
  />
</TableHead>
```

### After
```tsx
<TableHead className="w-10">
  <input
    type="checkbox"
    aria-label="Chọn tất cả tin đăng"
    checked={selected.size === result.data.length && result.data.length > 0}
    onChange={toggleSelectAll}
    className="rounded border-input"
  />
</TableHead>
```

**Why**: Checkbox in table headers need aria-label to distinguish them from row checkboxes.

---

## Fix #4: Admin Moderation - Row Checkboxes

**File**: `apps/web/app/[locale]/(admin)/admin/moderation/page.tsx`  
**Line**: 242

### Before
```tsx
<TableCell>
  <input
    type="checkbox"
    checked={selected.has(item.listingId)}
    onChange={() => toggleSelect(item.listingId)}
    className="rounded border-input"
  />
</TableCell>
```

### After (Option 1 - Simple)
```tsx
<TableCell>
  <input
    type="checkbox"
    aria-label={`Chọn tin đăng: ${item.listingId}`}
    checked={selected.has(item.listingId)}
    onChange={() => toggleSelect(item.listingId)}
    className="rounded border-input"
  />
</TableCell>
```

### After (Option 2 - Better with title)
```tsx
<TableCell>
  <input
    type="checkbox"
    aria-label={`Chọn tin đăng: ${item.title || item.listingId}`}
    checked={selected.has(item.listingId)}
    onChange={() => toggleSelect(item.listingId)}
    className="rounded border-input"
  />
</TableCell>
```

**Why**: Each checkbox needs unique aria-label that includes context about what listing it represents.

---

## Fix #5: Test Mock Image Component

**File**: `apps/web/app/[locale]/(public)/search/__tests__/search.spec.tsx`  
**Line**: 46

### Before
```tsx
vi.mock('next/image', () => ({
  default: (props: Record<string, unknown>) => <img {...props} />,
}));
```

### After (Option 1 - Simple)
```tsx
vi.mock('next/image', () => ({
  default: (props: Record<string, unknown>) => <img {...props} alt={props.alt || ''} />,
}));
```

### After (Option 2 - With Warning)
```tsx
vi.mock('next/image', () => ({
  default: (props: Record<string, unknown>) => {
    if (!props.alt) {
      console.warn('Image mock: Missing alt attribute', props);
    }
    return <img {...props} alt={props.alt || 'image'} />;
  },
}));
```

**Why**: Mock should enforce alt attribute to catch missing alts in tests before production.

---

## Fix #6 (Enhancement): Image Upload Drag-Drop Accessibility

**File**: `apps/web/components/listings/image-upload.tsx`  
**Lines**: 86-128

### Current Code
```tsx
<div
  onDragOver={handleDragOver}
  onDragLeave={handleDragLeave}
  onDrop={handleDrop}
  onClick={() => inputRef.current?.click()}
  className={cn(
    'flex cursor-pointer flex-col items-center justify-center rounded-lg border-2 border-dashed p-8 transition-colors',
    isDragging
      ? 'border-primary bg-primary/5'
      : 'border-muted-foreground/25 hover:border-primary/50',
  )}
>
  <svg>...</svg>
  <p className="text-sm font-medium">Kéo thả ảnh vào đây hoặc nhấp để chọn</p>
  <p className="mt-1 text-xs text-muted-foreground">
    JPG, PNG, WebP - Tối đa {maxFiles} ảnh, mỗi ảnh 10MB
  </p>
  <input
    ref={inputRef}
    type="file"
    accept="image/jpeg,image/png,image/webp"
    multiple
    className="hidden"
    onChange={(e) => {
      if (e.target.files) addFiles(e.target.files);
      e.target.value = '';
    }}
  />
</div>
```

### Enhanced Code
```tsx
<div
  onDragOver={handleDragOver}
  onDragLeave={handleDragLeave}
  onDrop={handleDrop}
  onClick={() => inputRef.current?.click()}
  role="button"
  tabIndex={0}
  aria-label="Khu vực kéo thả hoặc nhấp để tải ảnh lên"
  onKeyDown={(e) => {
    if (e.key === 'Enter' || e.key === ' ') {
      e.preventDefault();
      inputRef.current?.click();
    }
  }}
  className={cn(
    'flex cursor-pointer flex-col items-center justify-center rounded-lg border-2 border-dashed p-8 transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-primary focus-visible:ring-offset-2',
    isDragging
      ? 'border-primary bg-primary/5'
      : 'border-muted-foreground/25 hover:border-primary/50',
  )}
>
  <svg>...</svg>
  <p className="text-sm font-medium">Kéo thả ảnh vào đây hoặc nhấp để chọn</p>
  <p className="mt-1 text-xs text-muted-foreground">
    JPG, PNG, WebP - Tối đa {maxFiles} ảnh, mỗi ảnh 10MB
  </p>
  <input
    ref={inputRef}
    type="file"
    accept="image/jpeg,image/png,image/webp"
    multiple
    className="hidden"
    aria-label="Chọn ảnh để tải lên"
    onChange={(e) => {
      if (e.target.files) addFiles(e.target.files);
      e.target.value = '';
    }}
  />
</div>
```

**Changes**:
- `role="button"` - Identifies div as an interactive button
- `tabIndex={0}` - Makes div keyboard accessible
- `aria-label` - Describes the purpose to screen readers
- `onKeyDown` handler - Allows Enter/Space to activate
- `focus-visible` styles - Shows focus indicator for keyboard navigation

**Why**: Makes drag-drop area fully keyboard accessible for users who can't use a mouse.

---

## Testing After Implementation

### 1. Screen Reader Testing
```bash
# Use VoiceOver (Mac), NVDA (Windows), or JAWS
# Navigate to each fixed element and verify:
# - Input is announced with its aria-label
# - Checkbox is announced with its aria-label
# - Purpose is clear from screen reader announcement
```

### 2. Keyboard Navigation Testing
```bash
# Tab through the page
# Verify:
# - All interactive elements are reachable via Tab
# - Focus is visible on all elements
# - Enter/Space activates buttons and checkboxes
# - Image upload drag area is focused and can be activated with keyboard
```

### 3. Automated Testing
```bash
# Run axe
npm run test:a11y

# Or use Lighthouse
npx lighthouse https://localhost:3000 --view

# ESLint JSX Accessibility Plugin should catch these issues:
npm run lint
```

### 4. Visual Testing
```bash
# Verify with browser dev tools:
# - Inspect each input to confirm aria-label attribute exists
# - Check for proper focus styles
# - Verify focus ring colors meet contrast requirements
```

---

## Summary of Changes

| Issue | File | Line | Type | Severity |
|-------|------|------|------|----------|
| File input missing aria-label | image-upload.tsx | 118 | aria-label | HIGH |
| Search input missing aria-label | search/page.tsx | 189 | aria-label | HIGH |
| Header checkbox missing aria-label | moderation/page.tsx | 222 | aria-label | HIGH |
| Row checkboxes missing aria-label | moderation/page.tsx | 242 | aria-label | HIGH |
| Mock Image missing alt | search.spec.tsx | 46 | alt attribute | MEDIUM |
| Drag-drop area not keyboard accessible | image-upload.tsx | 86-128 | enhancement | MEDIUM |

---

## Estimated Implementation Time

- Fix #1: 2 minutes
- Fix #2: 2 minutes
- Fix #3: 2 minutes
- Fix #4: 3 minutes (need to find item.title in context)
- Fix #5: 2 minutes
- Fix #6: 10 minutes
- Testing: 15-20 minutes

**Total: ~35-45 minutes**