Mountain/Environment/

SynchronizationProvider.rs

//! # SynchronizationProvider (Environment)
//!
//! RESPONSIBILITIES:
//! - Implements
//!   [`SynchronizationProvider`](CommonLibrary::Synchronization::SynchronizationProvider)
//!   for [`MountainEnvironment`]
//! - Provides two-way synchronization of user data across devices
//! - Handles push (local → remote) and pull (remote → local) operations
//! - Manages sync state, conflict resolution, and offline queuing
//! - Provides sync status notifications and progress tracking
//!
//! ARCHITECTURAL ROLE:
//! - Optional provider for cloud sync functionality (currently stub)
//! - Would integrate with external sync service (Firebase, Supabase, custom
//!   backend)
//! - Uses authentication from `AuthenticationProvider` (to be implemented)
//! - Syncs multiple data types: settings, keybindings, workspaces, extensions,
//!   snippets
//! - Store sync metadata in
//!   [`ApplicationState`](crate::ApplicationState::ApplicationState)
//!
//! SYNC ARCHITECTURE:
//! **PushUserData**:
//! - Upload local data snapshot to remote server
//! - Compare versions to detect conflicts
//! - Handle conflicts via configured strategy (latest wins, manual, merge)
//! - Queue operations when offline for later retry
//! - Update local state after successful push
//!
//! **PullUserData**:
//! - Download latest remote data snapshot
//! - Compare with local version to detect conflicts
//! - Apply changes or prompt for conflict resolution
//! - Notify UI of sync completion via events
//!
//! CONFLICT RESOLUTION:
//! - Strategies: Latest Wins, Local Wins, Remote Wins, Manual Resolution, Merge
//! - Version tracking using timestamps or incremental version numbers
//! - Conflict UI would be handled by frontend (Sky) via notifications
//! - TODO: Implement proper three-way merge for settings files
//!
//! ERROR HANDLING:
//! - Uses [`CommonError`](CommonLibrary::Error::CommonError) for all operations
//! - Network failures should be queued for retry with exponential backoff
//! - Authentication errors should trigger re-authentication flow
//! - TODO: Implement proper error categorization and user messaging
//!
//! PERFORMANCE:
//! - Sync operations should be non-blocking and cancellable
//! - Large data payloads should be compressed and chunked
//! - Incremental sync to minimize data transfer (sync only deltas)
//! - Throttling to respect rate limits and avoid network saturation
//!
//! SECURITY:
//! - All sync traffic must be encrypted (HTTPS/TLS)
//! - Sensitive data (credentials, tokens) must be encrypted at rest on server
//! - Device identification and authentication required
//! - TODO: Implement end-to-end encryption for maximum security
//!
//! VS CODE REFERENCE:
//! - `vs/workbench/services/settings/common/settingsSync.ts` - settings sync
//!   service
//! - `vs/workbench/common/sync/syncService.ts` - sync service abstraction
//! - `vs/workbench/services/settings/common/settingsTarget.ts` - multi-device
//!   sync
//! - `vs/platform/update/common/update.ts` - update pattern for comparison
//!
//! TODO:
//! - Implement complete sync service integration (Firebase, Supabase, custom)
//! - Add authentication flow for sync service (OAuth, API keys)
//! - Implement conflict detection and resolution strategies (version vectors)
//! - Add offline queue with persistent storage for pending operations
//! - Implement retry logic with exponential backoff and jitter
//! - Support sync schedule configuration (manual, immediate, interval, on-wifi)
//! - Add sync progress tracking and cancellation support
//! - Implement selective sync based on user preferences (data type filters)
//! - Support data versioning for rollback and audit trail
//! - Add sync conflict UI for user resolution (frontend component)
//! - Implement sync encryption for sensitive data (client-side encryption)
//! - Support sync across multiple devices (device IDs, device management)
//! - Add sync history and audit log (for compliance and debugging)
//! - Implement sync migration and upgrade support (schema changes)
//! - Support sync for workspaces and configurations (full workspace state)
//! - Add sync for extensions and their data (extension state, settings)
//! - Implement sync throttling to avoid rate limits (adaptive throttling)
//! - Support sync for large files with chunking and resumable uploads
//! - Add sync statistics and analytics (sync frequency, data volume, errors)
//! - Implement sync health checks and monitoring (service status, connectivity)
//! - Support sync service fallback and failover (multiple backend endpoints)
//!
//! MODULE CONTENTS:
//! - [`SynchronizationProvider`](CommonLibrary::Synchronization::SynchronizationProvider) implementation:
//! - `PushUserData` - upload local data to remote
//! (stub)
//! - `PullUserData` - download remote data to local
//! (stub)
//! - Current state: Stub with logging only; production implementation pending
//!
//! ---
//! *Implementation notes: This provider is currently a stub with no actual sync
//! functionality. Future work will integrate with a cloud sync service
//! provider.*

use CommonLibrary::{
	Error::CommonError::CommonError,
	Synchronization::SynchronizationProvider::SynchronizationProvider,
};
use async_trait::async_trait;
use log::warn;
use serde_json::Value;

use super::MountainEnvironment::MountainEnvironment;

#[async_trait]
impl SynchronizationProvider for MountainEnvironment {
	async fn PushUserData(&self, _UserData:Value) -> Result<(), CommonError> {
		warn!("[SyncProvider] PushUserData is not implemented.");

		// A real implementation would connect to a settings sync service,
		// authenticate, and upload the user data payload.
		Ok(())
	}

	async fn PullUserData(&self) -> Result<Value, CommonError> {
		warn!("[SyncProvider] PullUserData is not implemented.");

		// A real implementation would connect to a settings sync service,
		// authenticate, and download the latest user data snapshot.
		Ok(Value::Null)
	}
}