[Draft] feat(android): Implement Kotlin Coroutines for React Native 0.78 Compatibility

[isouravganguly]

Overview

This PR implements a React Native document picker module using Kotlin coroutines for efficient asynchronous operations. This is a draft PR intended for reference and discussion purposes, as I am maintaining a local version while the main package has moved to newer implementations.

Technical Details

Coroutines Implementation (RNDocumentPickerModule.kt)

• Utilizes Kotlin coroutines for handling asynchronous file operations
• Implements CoroutineScope for structured concurrency
• Uses Dispatchers.IO for file system operations to avoid blocking the main thread
• Manages coroutine lifecycle with SupervisorJob for proper cleanup
• Handles file metadata extraction and copying in background threads

Native Module Architecture (RNDocumentPickerPackage.java)

• Implements React Native's Native Module system
• Registers document picker functionality through ReactPackage interface
• Provides native Android document picking capabilities to React Native
• Handles both single and multiple file selection
• Supports directory selection

Status

This PR will remain in draft status as it serves as a reference implementation for our local project needs. The main package has evolved to newer features, but this implementation is maintained for specific project requirements.

Purpose

Sharing this implementation for:

• Code review and feedback
• Reference for similar implementations
• Documentation of an approach to handling file operations with Kotlin coroutines in React Native

Note

This is not intended for merging into the main package but serves as a documented implementation of forked requirements, on and before 9.x version.

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[vonovak]

Hello,
Thanks for the PR.

Just to be clear, I don't intend to merge major PRs to old versions of the package. I do intend to merge bug fixes with limited scope. Rewriting to kotlin goes beyond that.

Instead people should move to the new package.

Thank you for your understanding. 🙏