# Pagination Integration Guide

## Overview
This guide explains how to replace the infinite scroll with proper pagination and add a status filter dropdown.

## Changes Needed

### 1. Add Status Filter Dropdown to HTML

**Location**: templates/dashboard.html, around line 568 (near the qualityFilter dropdown)

**Replace this section:**
```html
<div style="display: flex; gap: 8px; align-items: center;">
    <label style="color: #94a3b8; font-weight: 500;">Filter:</label>
    <select id="qualityFilter" onchange="loadFileQuality()" style="padding: 10px; border-radius: 6px; background: #1e293b; color: #e2e8f0; border: 1px solid #334155;">
        <option value="all">All States</option>
        <option value="discovered">Discovered</option>
        <option value="pending">Pending</option>
        <option value="processing">Processing</option>
        <option value="completed">Completed</option>
        <option value="failed">Failed</option>
        <option value="skipped">Skipped</option>
    </select>
</div>
```

**With this:**
```html
<div style="display: flex; gap: 15px; align-items: center;">
    <div style="display: flex; gap: 8px; align-items: center;">
        <label style="color: #94a3b8; font-weight: 500;">Status:</label>
        <select id="statusFilter" onchange="changeStatusFilter(this.value)" style="padding: 10px; border-radius: 6px; background: #1e293b; color: #e2e8f0; border: 1px solid #334155;">
            <option value="all">All States</option>
            <option value="discovered">Discovered</option>
            <option value="pending">Pending</option>
            <option value="processing">Processing</option>
            <option value="completed">Completed</option>
            <option value="failed">Failed</option>
            <option value="skipped">Skipped</option>
        </select>
    </div>
</div>
```

### 2. Add Pagination Controls Container

**Location**: Right after the closing `</table>` tag for qualityTable, before the `</div>` that closes the section

**Add:**
```html
                </table>
            </div>

            <!-- Pagination Controls -->
            <div id="paginationControls"></div>
        </div>
```

### 3. Replace JavaScript Code

**Location**: templates/dashboard.html, lines 1439-1625

**Remove:**
- All code from `// File Quality Analysis` to just before `function toggleFileSelection`
- Remove `function loadMoreFiles()`
- Remove `function handleScroll()`

**Replace with the code from:** `pagination-replacement.js`

### 4. Remove Infinite Scroll Event Listeners

**Location**: In the DOMContentLoaded event listener (around line 718-723)

**Remove these lines:**
```javascript
// Add infinite scroll
const tableContainer = document.querySelector('.section:has(#qualityTable)');
if (tableContainer) {
    tableContainer.addEventListener('scroll', handleScroll);
}
window.addEventListener('scroll', handleScroll);
```

### 5. Update applyFilter Function

**Location**: Around line 1613 in the current file

**Find:**
```javascript
function applyFilter(filterType) {
    // Update current filter
    currentAttributeFilter = filterType === 'all' ? null : filterType;

    // Update button styles...

    // Reload the file list with the new filter
    loadFileQuality();
}
```

**Update to:**
```javascript
function applyFilter(filterType) {
    // Update current filter
    currentAttributeFilter = filterType === 'all' ? null : filterType;
    currentPage = 1; // Reset to first page when changing filter

    // Update button styles to show active filter
    document.querySelectorAll('.filter-btn').forEach(btn => {
        const btnFilter = btn.getAttribute('data-filter');
        if (btnFilter === filterType) {
            btn.style.background = '#3b82f6';
            btn.style.fontWeight = '600';
        } else {
            btn.style.background = '#64748b';
            btn.style.fontWeight = '400';
        }
    });

    // Reload the file list with the new filter
    loadFileQuality();
}
```

### 6. Remove Old qualityFilter References

**Search for**: `document.getElementById('qualityFilter')`

**Remove or update** any references to the old qualityFilter dropdown since we're replacing it with statusFilter

## Key Features of New Pagination

### Status Filter Dropdown
- Select by status: All, Discovered, Pending, Processing, Completed, Failed, Skipped
- Independent from attribute filters
- Resets to page 1 when changed

### Pagination Controls
- **Previous/Next** buttons for navigation
- **Page indicator** showing current page and file range
- **Go to page** input for jumping to specific pages
- **Smart navigation** - Previous disabled on page 1

### Selection Persistence
- Selected files persist across page changes
- Checkboxes show correct state when returning to a page
- Clear selections when changing filters

### Efficient Loading
- Loads 100 files per page
- Only fetches what's needed
- Fast page switching

## Testing Checklist

After integration:

1. ✅ Status filter dropdown works
2. ✅ Can navigate pages with Previous/Next
3. ✅ Can jump to specific page
4. ✅ Selections persist across pages
5. ✅ Attribute filters work with pagination
6. ✅ Combining status + attribute filters works
7. ✅ Page resets to 1 when changing filters
8. ✅ No console errors

## Quick Integration Script

If you want to apply these changes automatically, here's a sed script approach:

1. Back up current dashboard.html
2. Apply the HTML changes manually (status filter, pagination container)
3. Replace the JavaScript section with pagination-replacement.js content

Or manually:
1. Open templates/dashboard.html
2. Follow each step above
3. Test in browser
4. Refresh and verify

## Comparison

### Before (Infinite Scroll)
- ❌ Confusing "Load More" button
- ❌ All files stay in DOM (memory issues)
- ❌ Hard to jump to specific section
- ❌ Scroll position lost on filter change

### After (Pagination)
- ✅ Clear page navigation
- ✅ Only 100 files in DOM at once
- ✅ Can jump to any page
- ✅ Clean state management
- ✅ Status filter dropdown for easy filtering