feat: implement Haptika PPG and Watch V1

packages/react-native-haptika-ppg/ios/Watch/HaptikaWatchConnectivityModule.swift

@@ -0,0 +1,65 @@
+import Foundation
+import React
+
+/// Thin React Native facade over the central WCSession owner. The PPG and
+/// Core Haptics objects remain Nitro modules; connectivity is intentionally a
+/// process-wide service and therefore must not be instantiated per HybridObject.
+@objc(HaptikaWatchConnectivity)
+final class HaptikaWatchConnectivityModule: NSObject {
+  @objc static func requiresMainQueueSetup() -> Bool { false }
+
+  @objc func start() {
+    HaptikaWatchConnectivityService.shared.activate()
+  }
+
+  @objc func getConnectionState(
+    _ resolve: RCTPromiseResolveBlock,
+    rejecter reject: RCTPromiseRejectBlock
+  ) {
+    let state = HaptikaWatchConnectivityService.shared.state()
+    resolve([
+      "supported": state.supported,
+      "paired": state.paired,
+      "watchAppInstalled": state.installed,
+      "reachable": state.reachable,
+      "activationState": state.activationState,
+      "latestEventId": state.latestEventId ?? NSNull(),
+      "latestEventAt": state.latestEventAt ?? NSNull()
+    ])
+  }
+
+  @objc func drainEvents(
+    _ resolve: RCTPromiseResolveBlock,
+    rejecter reject: RCTPromiseRejectBlock
+  ) {
+    resolve(HaptikaWatchConnectivityService.shared.drainEvents())
+  }
+
+  @objc func acknowledgeEvents(_ eventIds: [String]) {
+    HaptikaWatchConnectivityService.shared.acknowledge(eventIds: eventIds)
+  }
+
+  @objc func sendPreferences(
+    _ json: String,
+    resolver resolve: RCTPromiseResolveBlock,
+    rejecter reject: RCTPromiseRejectBlock
+  ) {
+    resolve(HaptikaWatchConnectivityService.shared.sendPreferences(json: json))
+  }
+
+  @objc func sendCommand(
+    _ json: String,
+    resolver resolve: RCTPromiseResolveBlock,
+    rejecter reject: RCTPromiseRejectBlock
+  ) {
+    resolve(HaptikaWatchConnectivityService.shared.sendCommand(json: json))
+  }
+
+  @objc func transferEvent(
+    _ json: String,
+    resolver resolve: RCTPromiseResolveBlock,
+    rejecter reject: RCTPromiseRejectBlock
+  ) {
+    resolve(HaptikaWatchConnectivityService.shared.transferEvent(json: json))
+  }
+}