# Task Breakdown - Care Book Block Ultimate

**Project**: WordPress Plugin para Controlo de Appointments KiviCare  
**Status**: Ready for Implementation  
**Branch**: 001-wordpress-plugin-para  
**Generated**: 2025-09-12 22:45  

---

## 📊 IMPLEMENTATION ROADMAP

### **🚨 PHASE 0: Security Foundation & Environment Setup** 
**Duration**: 3-4 days  
**Priority**: CRITICAL  

#### **T0.1** - Development Environment Security Update
**Priority**: CRITICAL  
**Estimated**: 4 hours  
**Dependencies**: None  

**Tasks**:
1. [ ] Update PHP to 8.1+ ou 8.4 (security compliance)
2. [ ] Update MySQL to 8.0.35+ (EOL compliance)  
3. [ ] Install Composer latest version
4. [ ] Verify WordPress 6.8+ compatibility
5. [ ] Test KiviCare 3.6.8+ integration points
6. [ ] Document new environment specifications

**Success Criteria**:
- ✅ PHP 8.1+/8.4 functional with all WordPress features
- ✅ MySQL 8.0+ running with proper character sets  
- ✅ Composer autoloading configured
- ✅ WordPress 6.8+ compatible environment

**Files Affected**:
- Development environment configuration
- Documentation updates

---

#### **T0.2** - Plugin Foundation Structure  
**Priority**: HIGH  
**Estimated**: 6 hours  
**Dependencies**: T0.1  

**Tasks**:
1. [ ] Create plugin main file with PHP 8+ features
2. [ ] Setup Composer with PSR-4 autoloading
3. [ ] Create namespace structure `CareBook\Ultimate\`
4. [ ] Setup security validation framework
5. [ ] Create health monitoring foundation
6. [ ] Setup error reporting system

**Success Criteria**:
- ✅ Plugin loads without errors on activation
- ✅ PSR-4 autoloading functional
- ✅ Namespace isolation working
- ✅ Security framework operational

**Code Example**:
```php
<?php
/**
 * Plugin Name: Care Book Block Ultimate
 * PHP Version: 8.1+
 * WordPress Version: 6.0+
 * KiviCare Version: 3.6.8+
 */
declare(strict_types=1);

namespace CareBook\Ultimate;

if (!defined('ABSPATH')) {
    exit;
}

require_once __DIR__ . '/vendor/autoload.php';
```

**Files to Create**:
- `care-book-block-ultimate.php` (main plugin file)
- `composer.json` (autoloading configuration)
- `src/` directory structure

---

#### **T0.3** - Database Schema & Migration System
**Priority**: HIGH  
**Estimated**: 5 hours  
**Dependencies**: T0.2  

**Tasks**:
1. [ ] Create MySQL 8.0+ optimized schema
2. [ ] Implement migration system with rollback
3. [ ] Add proper indexing strategy
4. [ ] Setup JSON metadata support
5. [ ] Create database health checks
6. [ ] Test schema performance with sample data

**Success Criteria**:
- ✅ Database table created successfully
- ✅ Indexes performing as expected
- ✅ Migration system functional
- ✅ JSON metadata working

**Schema**:
```sql
CREATE TABLE wp_care_booking_restrictions (
    id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    doctor_id BIGINT UNSIGNED NOT NULL,
    service_id BIGINT UNSIGNED NULL COMMENT 'NULL = applies to all services',
    restriction_type ENUM('hide_doctor', 'hide_service', 'hide_combination') NOT NULL,
    is_active BOOLEAN DEFAULT true,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    created_by BIGINT UNSIGNED,
    metadata JSON NULL COMMENT 'MySQL 8.0+ JSON support',
    
    INDEX idx_doctor_service (doctor_id, service_id),
    INDEX idx_active_restrictions (is_active, restriction_type),
    INDEX idx_created_at (created_at),
    FOREIGN KEY (doctor_id) REFERENCES wp_kc_doctors(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
```

**Files to Create**:
- `src/Database/Migration.php`
- `src/Database/Schema.php`
- `src/Database/HealthCheck.php`

---

### **🚀 PHASE 0.5: Integration Resilience Layer** ⭐ NEW
**Duration**: 2 days  
**Priority**: HIGH  

#### **T0.5.1** - KiviCare Hook Compatibility System
**Priority**: HIGH  
**Estimated**: 6 hours  
**Dependencies**: T0.3  

**Tasks**:
1. [ ] Create hook availability checking system
2. [ ] Implement fallback mechanisms for missing hooks
3. [ ] Add KiviCare version detection
4. [ ] Create graceful degradation patterns
5. [ ] Setup hook monitoring system
6. [ ] Test compatibility with KiviCare 3.6.8+

**Success Criteria**:
- ✅ Hook availability detection working
- ✅ Fallback mechanisms functional
- ✅ Version compatibility verified
- ✅ Graceful degradation operational

**Code Example**:
```php
<?php
namespace CareBook\Ultimate\Integration;

class HookCompatibility {
    public function checkKiviCareIntegration(): array {
        return [
            'hooks_available' => $this->checkRequiredHooks(),
            'version_compatible' => $this->checkKiviCareVersion(),
            'fallback_needed' => $this->determineFallbackNeed()
        ];
    }
    
    private function checkRequiredHooks(): bool {
        return has_filter('kivicare_available_doctors') && 
               has_filter('kivicare_available_services');
    }
}
```

**Files to Create**:
- `src/Integration/HookCompatibility.php`
- `src/Integration/FallbackHandler.php`
- `src/Integration/VersionChecker.php`

---

### **📋 PHASE 1: Core Foundation Development**
**Duration**: 5 days  
**Priority**: HIGH  

#### **T1.1** - Core Domain Models (PHP 8+ Features)
**Priority**: HIGH  
**Estimated**: 4 hours  
**Dependencies**: T0.5.1  

**Tasks**:
1. [ ] Create Restriction model with readonly class
2. [ ] Implement RestrictionType enum  
3. [ ] Add value objects for domain logic
4. [ ] Create model validation rules
5. [ ] Setup model testing framework
6. [ ] Document model relationships

**Success Criteria**:
- ✅ All models instantiate correctly
- ✅ Type safety enforced
- ✅ Validation rules working
- ✅ Unit tests passing

**Code Example**:
```php
<?php
declare(strict_types=1);

namespace CareBook\Ultimate\Models;

readonly class Restriction {
    public function __construct(
        public int $id,
        public int $doctorId,
        public ?int $serviceId,
        public RestrictionType $type,
        public bool $isActive = true,
        public ?\DateTimeImmutable $createdAt = null
    ) {}
}

enum RestrictionType: string {
    case HIDE_DOCTOR = 'hide_doctor';
    case HIDE_SERVICE = 'hide_service';  
    case HIDE_COMBINATION = 'hide_combination';
}
```

**Files to Create**:
- `src/Models/Restriction.php`
- `src/Models/RestrictionType.php`
- `tests/Unit/Models/RestrictionTest.php`

---

#### **T1.2** - Repository Pattern Implementation
**Priority**: HIGH  
**Estimated**: 5 hours  
**Dependencies**: T1.1  

**Tasks**:
1. [ ] Create RestrictionRepository interface
2. [ ] Implement MySQL repository with prepared statements
3. [ ] Add query builder for complex filtering
4. [ ] Implement caching layer integration
5. [ ] Add bulk operation methods
6. [ ] Create repository tests

**Success Criteria**:
- ✅ CRUD operations functional
- ✅ Prepared statements used throughout
- ✅ Caching integrated
- ✅ Bulk operations working
- ✅ Test coverage >90%

**Code Example**:
```php
<?php
namespace CareBook\Ultimate\Repositories;

interface RestrictionRepositoryInterface {
    public function findActiveRestrictions(): array;
    public function findByDoctorId(int $doctorId): array;
    public function bulkToggle(array $ids, bool $isActive): bool;
}

class RestrictionRepository implements RestrictionRepositoryInterface {
    // Implementation with MySQL 8.0+ optimizations
}
```

**Files to Create**:
- `src/Repositories/RestrictionRepositoryInterface.php`
- `src/Repositories/RestrictionRepository.php`
- `tests/Integration/RestrictionRepositoryTest.php`

---

#### **T1.3** - Multi-Layer Security System
**Priority**: CRITICAL  
**Estimated**: 6 hours  
**Dependencies**: T1.2  

**Tasks**:
1. [ ] Implement 7-layer security validation
2. [ ] Create rate limiting system
3. [ ] Add CSRF/XSS protection
4. [ ] Setup input validation framework
5. [ ] Implement output escaping
6. [ ] Create security testing suite

**Success Criteria**:
- ✅ All 7 security layers functional
- ✅ Rate limiting operational
- ✅ XSS/CSRF protection working
- ✅ Input validation comprehensive
- ✅ Security tests passing

**Code Example**:
```php
<?php
namespace CareBook\Ultimate\Security;

class SecurityValidator {
    public function validateAjaxRequest(): void {
        // Layer 1: WordPress nonce
        if (!wp_verify_nonce($_POST['nonce'], 'care_booking_nonce')) {
            wp_die('Security check failed');
        }
        
        // Layer 2: Capability checking
        if (!current_user_can('manage_care_restrictions')) {
            wp_die('Insufficient permissions');
        }
        
        // Layer 3: Rate limiting
        if (!$this->checkRateLimit()) {
            wp_die('Too many requests');
        }
        
        // Layer 4-7: Additional validation layers
        $this->validateInputData($_POST);
    }
}
```

**Files to Create**:
- `src/Security/SecurityValidator.php`
- `src/Security/RateLimiter.php`
- `src/Security/InputSanitizer.php`
- `tests/Unit/Security/SecurityValidatorTest.php`

---

### **⚡ PHASE 2: Core Features Implementation**
**Duration**: 7 days  
**Priority**: HIGH  

#### **T2.1** - CSS Injection System with FOUC Prevention
**Priority**: HIGH  
**Estimated**: 5 hours  
**Dependencies**: T1.3  

**Tasks**:
1. [ ] Create CSS generation engine
2. [ ] Implement FOUC prevention strategy
3. [ ] Add progressive enhancement
4. [ ] Setup CSS minification
5. [ ] Create CSS caching system
6. [ ] Test cross-browser compatibility

**Success Criteria**:
- ✅ CSS injected correctly on frontend
- ✅ FOUC prevented (<50ms critical CSS)
- ✅ Progressive enhancement working
- ✅ CSS performance optimized

**Code Example**:
```php
<?php
namespace CareBook\Ultimate\Services;

class CssInjectionService {
    public function injectRestrictionStyles(): void {
        $restrictions = $this->getActiveRestrictions();
        $css = $this->generateHidingCss($restrictions);
        
        // Critical CSS inline for FOUC prevention
        wp_add_inline_style('kivicare-frontend', $css);
    }
    
    private function generateHidingCss(array $restrictions): string {
        // Generate optimized CSS selectors
        return $this->buildSelectorCss($restrictions);
    }
}
```

**Files to Create**:
- `src/Services/CssInjectionService.php`
- `src/Services/CssGenerator.php`
- `tests/Unit/Services/CssInjectionServiceTest.php`

---

#### **T2.2** - WordPress Admin Interface (AJAX)
**Priority**: HIGH  
**Estimated**: 8 hours  
**Dependencies**: T2.1  

**Tasks**:
1. [ ] Create admin page structure
2. [ ] Implement AJAX endpoints with security
3. [ ] Build toggle interface components
4. [ ] Add bulk operations UI
5. [ ] Create progress indicators
6. [ ] Add user feedback systems

**Success Criteria**:
- ✅ Admin interface loads correctly
- ✅ AJAX responses <75ms
- ✅ Toggle functionality working
- ✅ Bulk operations functional
- ✅ User experience intuitive

**Code Example**:
```php
<?php
namespace CareBook\Ultimate\Admin;

class AjaxHandler {
    public function registerEndpoints(): void {
        add_action('wp_ajax_care_toggle_restriction', [$this, 'toggleRestriction']);
        add_action('wp_ajax_care_bulk_update', [$this, 'bulkUpdate']);
    }
    
    public function toggleRestriction(): void {
        $this->validateNonce();
        $this->checkCapabilities();
        
        $request = $this->validateRequest($_POST);
        $result = $this->restrictionService->toggle($request);
        
        wp_send_json_success($result);
    }
}
```

**Files to Create**:
- `src/Admin/AdminInterface.php`
- `src/Admin/AjaxHandler.php`
- `assets/js/admin.js`
- `assets/css/admin.css`
- `templates/admin/restriction-manager.php`

---

#### **T2.3** - KiviCare Hook Integration System
**Priority**: HIGH  
**Estimated**: 6 hours  
**Dependencies**: T2.2  

**Tasks**:
1. [ ] Implement WordPress hook handlers
2. [ ] Create data filtering logic
3. [ ] Add hook monitoring system
4. [ ] Test integration with KiviCare 3.6.8+
5. [ ] Create integration tests
6. [ ] Document hook usage

**Success Criteria**:
- ✅ Hooks filter data correctly
- ✅ Integration stable with KiviCare
- ✅ No conflicts with other plugins
- ✅ Performance impact <1.5%

**Code Example**:
```php
<?php
namespace CareBook\Ultimate\Integrations\KiviCare;

class HookManager {
    public function registerHooks(): void {
        add_filter('kivicare_available_doctors', [$this, 'filterDoctors'], 10, 2);
        add_filter('kivicare_available_services', [$this, 'filterServices'], 10, 2);
        add_action('kivicare_before_booking_form', [$this, 'injectCss']);
    }
    
    public function filterDoctors(array $doctors, array $context): array {
        $restrictions = $this->getActiveRestrictions();
        return $this->applyDoctorFiltering($doctors, $restrictions);
    }
}
```

**Files to Create**:
- `src/Integrations/KiviCare/HookManager.php`
- `src/Integrations/KiviCare/DataFilter.php`
- `tests/Integration/KiviCareIntegrationTest.php`

---

#### **T2.4** - Advanced Caching System
**Priority**: HIGH  
**Estimated**: 4 hours  
**Dependencies**: T2.3  

**Tasks**:
1. [ ] Implement distributed cache interface
2. [ ] Setup WordPress Transients caching
3. [ ] Create intelligent cache invalidation
4. [ ] Add cache performance monitoring
5. [ ] Setup cache warming system
6. [ ] Create cache tests

**Success Criteria**:
- ✅ Cache hit ratio >98%
- ✅ Cache invalidation working correctly
- ✅ Performance improvement measurable
- ✅ Multi-server compatible

**Code Example**:
```php
<?php
namespace CareBook\Ultimate\Cache;

class RestrictionCache {
    private const CACHE_KEY = 'care_booking_restrictions';
    private const CACHE_EXPIRATION = 3600; // 1 hour
    
    public function getRestrictions(): array {
        $cached = get_transient(self::CACHE_KEY);
        if ($cached !== false) {
            return $cached;
        }
        
        $restrictions = $this->loadFromDatabase();
        set_transient(self::CACHE_KEY, $restrictions, self::CACHE_EXPIRATION);
        
        return $restrictions;
    }
}
```

**Files to Create**:
- `src/Cache/CacheManager.php`
- `src/Cache/CacheInvalidator.php`
- `tests/Unit/Cache/CacheManagerTest.php`

---

### **🔧 PHASE 3: Enhancement & Production Readiness**
**Duration**: 10-12 days  
**Priority**: MEDIUM-HIGH  

#### **T3.1** - Production Health Monitoring System
**Priority**: HIGH  
**Estimated**: 6 hours  
**Dependencies**: T2.4  

**Tasks**:
1. [ ] Create comprehensive health check system
2. [ ] Implement error detection and reporting
3. [ ] Setup performance monitoring
4. [ ] Create automated alerts
5. [ ] Add system diagnostics
6. [ ] Create monitoring dashboard

**Success Criteria**:
- ✅ Health checks running hourly
- ✅ Errors detected and reported
- ✅ Performance metrics tracked
- ✅ Alerts functioning

**Code Example**:
```php
<?php
namespace CareBook\Ultimate\Monitoring;

class HealthMonitor {
    public function checkKiviCareIntegration(): array {
        return [
            'hooks_available' => $this->checkRequiredHooks(),
            'database_accessible' => $this->checkDatabaseHealth(),
            'cache_working' => $this->checkCacheSystem(),
            'permissions_correct' => $this->checkPermissions()
        ];
    }
    
    public function scheduleHealthChecks(): void {
        wp_schedule_event(time(), 'hourly', 'care_booking_health_check');
    }
}
```

**Files to Create**:
- `src/Monitoring/HealthMonitor.php`
- `src/Monitoring/PerformanceTracker.php`
- `src/Monitoring/AlertSystem.php`

---

#### **T3.2** - Bulk Operations & Advanced Features
**Priority**: MEDIUM  
**Estimated**: 6 hours  
**Dependencies**: T3.1  

**Tasks**:
1. [ ] Implement bulk toggle operations
2. [ ] Create import/export functionality
3. [ ] Add search and filtering
4. [ ] Create audit logging system
5. [ ] Add backup/restore mechanisms
6. [ ] Create advanced UI components

**Success Criteria**:
- ✅ Bulk operations handle >1000 items
- ✅ Import/export working with JSON
- ✅ Search functionality responsive
- ✅ Audit trail complete

**Files to Create**:
- `src/Services/BulkOperations.php`
- `src/Services/ImportExport.php`
- `src/Services/AuditLogger.php`

---

#### **T3.3** - Comprehensive Testing Suite
**Priority**: HIGH  
**Estimated**: 8 hours  
**Dependencies**: T3.2  

**Tasks**:
1. [ ] Complete unit test coverage (>90%)
2. [ ] Create integration tests with KiviCare
3. [ ] Add performance regression tests
4. [ ] Setup automated test running
5. [ ] Create mock objects for testing
6. [ ] Add end-to-end tests

**Success Criteria**:
- ✅ Unit test coverage >90%
- ✅ Integration tests passing
- ✅ Performance tests meeting targets
- ✅ CI/CD pipeline functional

**Files to Create**:
- `tests/Unit/` (complete coverage)
- `tests/Integration/` (KiviCare integration)
- `tests/Performance/` (regression tests)
- `tests/Mocks/KiviCareMock.php`

---

#### **T3.4** - Performance Optimization & Finalization
**Priority**: MEDIUM  
**Estimated**: 6 hours  
**Dependencies**: T3.3  

**Tasks**:
1. [ ] Optimize database queries for MySQL 8.0+
2. [ ] Implement advanced caching strategies
3. [ ] Minimize CSS and JavaScript
4. [ ] Add lazy loading where appropriate
5. [ ] Create performance benchmarks
6. [ ] Finalize documentation

**Success Criteria**:
- ✅ Page load overhead <1.5%
- ✅ AJAX response time <75ms
- ✅ Cache hit ratio >98%
- ✅ Memory usage <8MB

**Performance Targets**:
- Page Load Overhead: <1.5% (improved from <2%)
- AJAX Response: <75ms (improved from <100ms)
- Cache Hit Ratio: >98% (improved from >95%)
- Database Query: <30ms (MySQL 8.0 optimized)
- Memory Usage: <8MB (PHP 8+ efficiency)

---

## 🧪 TESTING STRATEGY

### **Unit Tests** (PHPUnit 10+)
- All models and services
- Security validation functions
- Cache invalidation logic
- Input sanitization methods

### **Integration Tests**
- WordPress hook integration
- KiviCare compatibility (3.6.8+)
- Database operations
- Admin interface functionality

### **Performance Tests**
- Page load impact measurement
- AJAX response time testing
- Cache performance validation
- Database query optimization

### **Security Tests**
- Input validation testing
- XSS/CSRF prevention validation
- Rate limiting verification
- Capability checking tests

---

## 📈 SUCCESS METRICS

### **Functional Metrics**
- [ ] Doctor/service restrictions working in real-time
- [ ] Admin interface learning curve <30 seconds
- [ ] Zero KiviCare core modifications required
- [ ] Bulk operations handle >1000 items efficiently

### **Performance Metrics**
- [ ] Page load overhead <1.5%
- [ ] AJAX response time <75ms
- [ ] Cache hit ratio >98%
- [ ] Database queries <30ms (MySQL 8.0)
- [ ] Memory usage <8MB

### **Security Metrics**
- [ ] All 7 security layers operational
- [ ] Zero security vulnerabilities in code scan
- [ ] Rate limiting prevents abuse
- [ ] Input validation blocks malicious data

### **Reliability Metrics**
- [ ] Health monitoring system operational
- [ ] Automated error detection working
- [ ] Fallback mechanisms tested
- [ ] Integration resilience confirmed

---

## ⚠️ RISK MITIGATION

### **Critical Issues Addressed**

1. **Hook Dependencies Risk**: ✅ Fallback mechanisms + version checking
2. **FOUC Performance Risk**: ✅ Critical CSS inline + progressive enhancement
3. **Database Scaling**: ✅ Advanced indexing + MySQL 8.0+ optimization
4. **Cache Distribution**: ✅ Distributed cache interface preparation
5. **AJAX Security**: ✅ Multi-layer security validation
6. **Plugin Conflicts**: ✅ Enhanced namespacing + prefixing
7. **PHP 8+ Migration**: ✅ Graceful degradation + version checking
8. **Testing Complexity**: ✅ Mock objects + live integration tests
9. **Rollback Strategy**: ✅ Backup/restore mechanism
10. **Production Monitoring**: ✅ Health monitoring system

---

## 📅 TIMELINE SUMMARY

| Phase | Duration | Focus | Critical Tasks |
|-------|----------|-------|---------------|
| **Phase 0** | 3-4 days | Security & Foundation | T0.1, T0.2, T0.3 |
| **Phase 0.5** | 2 days | Integration Resilience | T0.5.1 |
| **Phase 1** | 5 days | Core Foundation | T1.1, T1.2, T1.3 |
| **Phase 2** | 7 days | Core Features | T2.1, T2.2, T2.3, T2.4 |
| **Phase 3** | 10-12 days | Enhancement & Production | T3.1, T3.2, T3.3, T3.4 |
| **Total** | **27-30 days** | **Complete System** | **Production-Ready Plugin** |

---

## ✅ DEFINITION OF DONE

### **Technical Requirements**
- [ ] ✅ PHP 8.1+/8.4 compatibility verified
- [ ] ✅ MySQL 8.0+ optimized and tested
- [ ] ✅ WordPress 6.8+ compatibility confirmed
- [ ] ✅ KiviCare 3.6.8+ integration working
- [ ] ✅ PSR-4 autoloading implemented
- [ ] ✅ Multi-layer security operational
- [ ] ✅ Performance targets met

### **Quality Requirements**
- [ ] ✅ Test coverage >90%
- [ ] ✅ No security vulnerabilities
- [ ] ✅ Code review completed
- [ ] ✅ Documentation complete
- [ ] ✅ Health monitoring operational

### **Business Requirements**
- [ ] ✅ User acceptance criteria met
- [ ] ✅ Performance requirements achieved
- [ ] ✅ Scalability targets reached
- [ ] ✅ Reliability standards met

---

**Status**: ✅ **READY FOR IMPLEMENTATION**  
**Next Steps**: Begin Phase 0 - Security Foundation & Environment Setup  
**Priority**: Execute T0.1 (Development Environment Security Update)

---

**Generated By**: Context7 + Planning Phase + Validation Process  
**Total Tasks**: 16 major tasks with 94+ subtasks  
**Confidence Level**: **HIGH** (validated through multiple sources)