Data In-Memory

An in-memory implementation of the `DataClient` interface for the Flutter News App Toolkit.

This data_inmemory package provides a lightweight, non-persistent in-memory implementation of the DataClient interface within the Flutter News App Full Source Code Toolkit. It is designed primarily for testing, local development, or scenarios where a temporary data store is sufficient. This package allows for simulating a backend data source entirely in memory, supporting standard CRUD operations, advanced querying, and aggregation capabilities without requiring a live database connection.

⭐ Feature Showcase: Flexible In-Memory Data Management

This package offers a comprehensive set of features for managing data entities in memory.

🧱 Core Functionality

🚀 DataClient Implementation

• DataInMemoryClient<T> Class: A concrete in-memory implementation of the DataClient<T> interface, enabling type-safe interactions with various data models.
• Flexible Initialization: Supports initialData to pre-populate the client with existing data, accelerating setup for testing and development.

🌐 Comprehensive Data Operations

• CRUD Operations: Implements create, read, update, and delete methods for standard data manipulation.
• User-Scoped & Global Data: Supports operations tied to a specific userId for user-scoped data, as well as operations targeting global data not associated with any user.
• Rich Document-Style Querying: The readAll method supports advanced filtering with operators like $in, $nin, $ne, $gte on any field (including nested ones), multi-field sorting via SortOption objects, and cursor-based pagination via PaginationOptions.
• Generic Text Search: Supports the $regex operator for powerful, case-insensitive text searches on any string field (e.g., {'name': {'$regex': 'term', '$options': 'i'}}).
• Efficient Counting & Aggregation: Includes a count method for efficient document counting and an aggregate method to simulate basic MongoDB aggregation pipelines (supporting $match, $group, $sort, $limit), enabling testing of analytics-style queries.

🛡️ Standardized Error Handling

• HttpException Propagation: Throws standard exceptions from package:core (e.g., NotFoundException, BadRequestException) for consistent error handling, ensuring predictable error management across the application layers.

💡 Your Advantage: You get a meticulously designed, production-quality in-memory data client that simplifies testing, accelerates local development, and provides robust data management capabilities without the overhead of a persistent backend. This package is ideal for rapid prototyping and reliable unit/integration testing.

🔑 Licensing

This source code is licensed for commercial use and is provided for local evaluation. A Lifetime Commercial License is required for any production or public-facing application.

Please visit the main Flutter News App Full Source Code Toolkit organization page to review the full license terms and to purchase.