upgrade gradle & agp & kotlin & kotlinCompilerExtensionVersion & comp… #9
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…ervices
This commit introduces a major architectural refactor of the JavaScript integration, moving from a monolithic, hardcoded approach to a dynamic, modular, and scalable system for handling GATT services.
The previous implementation tightly coupled Kotlin classes (`HrmGattValue`, `BatteryGattValue`) with specific JS files and relied on fragile data access patterns (reading global variables directly). The new architecture addresses these limitations and establishes a robust foundation for future expansion.
### Key Architectural Changes:
1. **Dynamic & Modular JS with `gatt-core.js`:**
* A central `gatt-core.js` now provides a registration pattern (`registerGatt`).
* Individual service files (`hrm.js`, `battery.js`) are now self-contained modules that register themselves upon loading.
* This decouples the Android host from knowing which services exist, enabling true dynamic loading.
2. **Centralized Clock and Scheduler:**
* A new `clock.js` provides a shared sense of time for all JS modules.
* `MainActivity` now acts as a scheduler, driving the JS world by periodically calling `Clock.tick()` and the universal `next(uuid)` function for all registered modules. This aligns with QuickJS's passive execution model and removes the need for `setInterval` from within JS.
3. **On-Demand Script Loading:**
* The app now only loads core scripts (`clock.js`, `gatt-core.js`) on startup.
* Service-specific scripts (`hrm.js`, `battery.js`) are loaded dynamically when the user interacts with new UI buttons, demonstrating the system's extensibility.
4. **Robust Data Fetching ("Two-Step Method"):**
* A critical issue was discovered where `jsContext.evaluate()` returns `null` if the target JS function's definition contains a `console.log`, regardless of whether it's executed.
* This was solved by implementing a robust "two-step" data fetching pattern:
1. **Execute:** Use `evaluate()` to run the JS function and assign its result to a temporary global variable (e.g., `__temp_result = getValue(...)`).
2. **Read:** Use `globalObject.getProperty("__temp_result")` to safely read the value, bypassing the `evaluate()` return value issue.
5. **Integration of Legacy Abstractions:**
* The legacy `HrmGattValue` and `BatteryGattValue` classes were refactored.
* They no longer handle script loading and instead are initialized with a `JSContext`.
* Their internal logic was updated to use the new "two-step" data fetching method, proving the new JS backend can support various Kotlin-side consumer patterns.
### UI and Code Cleanup:
* The `MainScreen` UI was updated to include buttons for on-demand script loading.
* It now displays data fetched via two methods (direct access and through the legacy classes) for side-by-side comparison, validating the refactor.
* Redundant engine classes (`KJsEngine`, `JsEngine.java`) were removed, simplifying the architecture to a single `QuickJsEngine`.
This new architecture is significantly more maintainable, scalable, and decoupled. Adding a new GATT service is now as simple as adding a new JS file to the assets without needing to modify any Kotlin code.
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upgrade gradle & agp & kotlin & compose bom & kotlin comipler Ext version