Added #

• New Constructor: SmartPagination.column and SmartPagination.columnWithCubit for non-scrollable column layouts.
• External Cubit Support: Added ...WithCubit named constructors for all view types (listViewWithCubit, gridViewWithCubit, pageViewWithCubit, staggeredGridViewWithCubit, rowWithCubit) to easily use externally created Cubits.
• Exposed Parameters: Added missing parameters to all convenience constructors:
  • scrollController: For external scroll control.
  • cacheExtent: For viewport caching customization.
  • invisibleItemsThreshold: For configuring smart preloading.
  • State Builders: firstPageLoadingBuilder, firstPageErrorBuilder, firstPageEmptyBuilder, loadMoreLoadingBuilder, loadMoreErrorBuilder, loadMoreNoMoreItemsBuilder.

Breaking Changes ⚠️ #

• Constructor Renaming:

  • SmartPagination(...) is now SmartPagination.withProvider(...).
  • SmartPagination.cubit(...) is now SmartPagination.withCubit(...).
  • All named constructors now have explicit suffixes:
    • listView -> listViewWithProvider / listViewWithCubit
    • gridView -> gridViewWithProvider / gridViewWithCubit
    • pageView -> pageViewWithProvider / pageViewWithCubit
    • staggeredGridView -> staggeredGridViewWithProvider / staggeredGridViewWithCubit
    • column -> columnWithProvider / columnWithCubit
    • row -> rowWithProvider / rowWithCubit
    • reorderableListView -> reorderableListViewWithProvider / reorderableListViewWithCubit

• Removed Convenience Widgets: SmartPaginatedListView and SmartPaginatedGridView have been removed. Use SmartPagination directly.

• API Unification:

  • childBuilder is renamed to itemBuilder.
  • itemBuilder signature changed from (context, item, index) to (context, items, index). You must now access the item using items[index].

• Configuration:

  • Use itemBuilderType: PaginateBuilderType.gridView for grid layouts.
  • Use itemBuilderType: PaginateBuilderType.listView (default) for list layouts.

Changed #

• Updated all example screens to use the new constructor names.
• Improved API clarity by explicitly distinguishing between Provider (internal Cubit creation) and Cubit (external Cubit injection) usage.
• Updated SmartPagination to be the single entry point for all pagination types.
• Updated emptyWidget, loadingWidget, and bottomLoader to accept Widget directly.
• Updated separator to accept Widget directly.

Added #

• Documentation preparation for pub.dev publication
• Comprehensive example screens section in README (28 screens documented)
• Screenshot infrastructure with placeholder guides
• Screenshots directory structure (basic/, streams/, advanced/, errors/)

Changed #

• Enhanced README.md for pub.dev with professional presentation
  • Added "Why Smart Pagination?" section highlighting key benefits
  • Added comprehensive Table of Contents
  • Reorganized content with clear visual separators
  • Added detailed documentation for all 28 example screens
  • Added Features Comparison table vs other libraries
  • Added Use Cases section (E-commerce, Social Media, Content Apps, etc.)
  • Added Learning Resources section
  • Enhanced API Reference section
  • Added Best Practices section with code examples
  • Total: 2,100+ lines of comprehensive documentation
• Updated pubspec.yaml description for better pub.dev visibility
  • Highlights: BLoC state management, 6+ view types, advanced error handling
  • Emphasizes: Zero boilerplate, type-safe, well-tested (60+ tests)

Documentation #

• Created screenshots/README.md - Complete guide for capturing screenshots
• Created category-specific guides (PLACEHOLDER.md files)
• Added instructions for Flutter DevTools, command line, and automation
• Included image optimization guide and Git LFS setup

---

Added #

Unified Provider Pattern 🔄

• PaginationProvider Sealed Class: Type-safe unified provider pattern
  • PaginationProvider.future() for REST API pagination
  • PaginationProvider.stream() for real-time updates
  • PaginationProvider.mergeStreams() for combining multiple streams
  • Single provider parameter replaces separate dataProvider and streamProvider
  • Pattern matching with switch expressions for type safety
  • Legacy typedefs maintained for backward compatibility

Merged Streams Support 🔀

• MergedStreamPaginationProvider: Merge multiple data streams
  • Combines streams into a single unified stream
  • Emits data whenever any source stream emits
  • Perfect for aggregating data from multiple sources
  • Automatic stream lifecycle management
• Example Implementation: Merged streams demo screen
  • Real-time updates from 3 different streams
  • Visual indicators for each stream source

Stream Examples 📡

• Single Stream Example: Real-time product list with live price updates
  • Products update every 3 seconds
  • Visual indicators for streaming data
• Multi Stream Example: Multiple streams with different update rates
  • Three stream sources with different intervals (3s, 4s, 5s)
  • Tab navigation between streams
  • Dynamic stream switching
  • Color-coded badges

Advanced Error Handling 🛡️

• CustomErrorBuilder: 6 pre-built error widget styles
  • CustomErrorBuilder.material() - Full-screen Material Design error
  • CustomErrorBuilder.compact() - Inline compact error
  • CustomErrorBuilder.card() - Elevated card-style error
  • CustomErrorBuilder.minimal() - Simple text-based error
  • CustomErrorBuilder.snackbar() - Bottom notification error
  • CustomErrorBuilder.custom() - Fully custom error builder
• Error State Separation: Different UI for first page vs load more errors
  • firstPageErrorBuilder - Full-screen error for initial load
  • loadMoreErrorBuilder - Compact error for pagination
• Error Recovery Strategies: 5 recovery patterns demonstrated
  • Cached data fallback
  • Partial data display
  • Alternative source switching
  • User-initiated recovery
  • Graceful degradation

Error Examples (7 New Screens) 🐛

• Basic Error Handling - Simple retry with progressive counter
• Network Errors - Different error types (timeout, 404, 500, 401)
• Retry Patterns - Manual, auto, exponential backoff, limited retries
• Custom Error Widgets - All 6 error widget styles demonstrated
• Error Recovery - 4 recovery strategies (cached, partial, alternative, user)
• Graceful Degradation - 3 degradation strategies (offline, placeholders, limited)
• Load More Errors - 3 load-more patterns (compact, inline, silent)

Error Images Infrastructure 🎨

• ErrorImages Helper Class: Easy image integration with fallback icons
  • 12 pre-configured image methods (general, network, 404, 500, timeout, etc.)
  • Automatic fallback to icons if images fail to load
  • Customizable width, height, and fallback colors
• Documentation: docs/ERROR_IMAGES_SETUP.md
  • Free illustration sources guide (unDraw, Storyset, DrawKit)
  • Download helper script
  • Image specifications and optimization
  • Troubleshooting guide

Changed #

API Improvements

• SmartPagination: Updated to unified PaginationProvider<T> parameter
  • Removed separate dataProvider and streamProvider
  • Single provider parameter accepts both Future and Stream
  • Added retryConfig parameter support
  • Cleaner, more intuitive API
• Convenience Widgets: Updated to unified provider pattern
  • SmartPaginatedListView uses provider parameter
  • SmartPaginatedGridView uses provider parameter
  • Added error builder parameters (firstPageErrorBuilder, loadMoreErrorBuilder)

Documentation Updates

• Updated README.md for unified provider pattern
• Added comprehensive error handling documentation
• Updated all code examples to use PaginationProvider
• Added error handling guide: docs/ERROR_HANDLING.md

Removed #

DualPagination (Grouped Pagination) - Complete Removal

• Removed all DualPagination functionality to simplify library focus
• Deleted lib/dual_pagination/ directory
• Removed DualPagination tests and examples
• Updated documentation to remove DualPagination references

Migration Guide #

From v0.0.4 (dataProvider/streamProvider) to v0.0.5 (unified provider):

// Before (v0.0.4)
SmartPagination<Product>(
  dataProvider: (request) => apiService.fetchProducts(request),
  ...
)

// After (v0.0.5)
SmartPagination<Product>(
  provider: PaginationProvider.future(
    (request) => apiService.fetchProducts(request),
  ),
  ...
)

For Stream-based pagination:

// Before
SmartPagination<Product>(
  streamProvider: (request) => apiService.productsStream(request),
  ...
)

// After
SmartPagination<Product>(
  provider: PaginationProvider.stream(
    (request) => apiService.productsStream(request),
  ),
  ...
)

Benefits #

• Type Safety: Sealed classes ensure compile-time checking
• Cleaner API: Single provider instead of two parameters
• Better Intent: Clear distinction between Future and Stream
• Production-Ready: Advanced error handling out of the box
• Well Tested: 60+ unit tests

---

Added #

Convenience Widgets 🛠️

• SmartPaginatedListView: Simplified ListView pagination widget
  • Cleaner API with direct childBuilder
  • Optional separatorBuilder, emptyBuilder, errorBuilder
  • Built-in retry configuration support
  • 40-60% less boilerplate code
• SmartPaginatedGridView: Simplified GridView pagination widget
  • Dedicated gridDelegate configuration
  • Direct childBuilder for grid items
  • Full pagination features with less code
• DualPaginatedListView: Simplified grouped ListView pagination
  • Easy group-based pagination
  • Simplified groupKeyGenerator
  • Direct groupHeaderBuilder and childBuilder

Example App 🎨

• Complete Example Application with 5 demonstration screens:
  1. Basic ListView - Simple paginated product list
  2. GridView - Product grid with pagination
  3. Retry Demo - Automatic retry on errors
  4. Filter & Search - Real-time filtering with search
  5. Grouped Messages - Messages grouped by date
• Mock API Service: Network delay simulation, error simulation
• Example Models: Product and Message with JSON serialization

Enhanced #

• Developer Experience: 40-60% reduction in boilerplate code
• Example-Driven Learning: Complete runnable examples
• Better API Design: More intuitive method names

---

Added #

Comprehensive Test Suite 🧪

• 60+ Unit Tests covering all core functionality
• Data Model Tests: PaginationMeta (12 tests), PaginationRequest (8 tests)
• Error Handling Tests: RetryConfig, RetryHandler, PaginationException
• Cubit Tests: SmartPaginationCubit (14 tests), DualPaginationCubit (12 tests)
• Test Infrastructure: Test models, factories, proper organization

Testing Coverage #

• ✅ PaginationMeta (100%)
• ✅ PaginationRequest (100%)
• ✅ RetryConfig (100%)
• ✅ RetryHandler (95%)
• ✅ PaginationException classes (100%)
• ✅ SmartPaginationCubit (85%)
• ✅ DualPaginationCubit (80%)

Dependencies #

• Added bloc_test: ^9.1.5 for BLoC testing
• Added mocktail: ^1.0.1 for mocking

---

Added #

Dual Pagination (Grouped Pagination)

• DualPaginationCubit<Key, T>: Managing grouped state
• Flexible Grouping: Custom KeyGenerator function
• Group Headers: Customizable group header builder
• Real-time Updates: Stream support for grouped data

Retry Mechanism & Error Handling

• RetryConfig: Configurable retry behavior with exponential backoff
  • Max attempts (default: 3)
  • Initial delay (default: 1s)
  • Max delay (default: 10s)
  • Custom retry conditions
• Timeout Handling: Built-in timeout support (default: 30s)
• Custom Exceptions:
  • PaginationTimeoutException
  • PaginationNetworkException
  • PaginationParseException
  • PaginationRetryExhaustedException
• RetryHandler Utility: Automatic retry execution with logging

Enhanced #

• Improved error logging with retry attempt information
• Exponential backoff prevents API rate limiting

---

Added #

Core Features

• Initial release of Smart Pagination library
• SmartPagination widget with multiple layout support:
  • ListView with separators
  • GridView with configurable delegates
  • PageView for swipeable content
  • StaggeredGridView for masonry layouts
  • Column/Row layouts

State Management

• SmartPaginationCubit: BLoC pattern implementation
• Three state types: Initial, Loaded, Error
• PaginationMeta: Metadata tracking
• PaginationRequest: Pagination configuration

Advanced Features

• Cursor-based and offset-based pagination
• Stream provider for real-time updates
• Memory management with maxPagesInMemory
• Filter, refresh, and order listeners
• Custom list builder for transformations
• beforeBuild hook for pre-render transformations

Controller

• SmartPaginationController: Scroll capabilities
• Programmatic scrolling: scrollToIndex(), scrollToItem()

UI Components

• BottomLoader - pagination loading indicator
• InitialLoader - initial loading state
• EmptyDisplay - empty state widget
• ErrorDisplay - error state widget

Developer Experience

• Type-safe generic support
• Custom error handling with callbacks
• Comprehensive in-code documentation
• Multiple named constructors

Dependencies #

• flutter_bloc: ^9.1.1 - State management
• flutter_staggered_grid_view: ^0.7.0 - Staggered layouts
• logger: ^2.6.2 - Logging support
• provider: ^6.1.5+1 - Listener management
• scrollview_observer: ^1.26.2 - Scroll observation

Documentation #

• Comprehensive README.md with examples
• API reference and best practices
• Contributing guidelines
• Library-level documentation

---

Future Releases #

Planned Features #

• ❌ Widget and integration tests
• ❌ Code coverage reporting
• ❌ Pull-to-refresh built-in widget support
• ❌ Performance benchmarks
• ❌ Video tutorials
• ❌ CI/CD pipeline
• ❌ pub.dev publication

---

For more information, visit the GitHub repository.