Initial Commit

app/src/main/java/com/hawhamburg/micr0bu/service/TripServiceBus.kt

@@ -0,0 +1,38 @@
+package com.hawhamburg.micr0bu.service
+
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+
+/**
+ * Process-level singleton that bridges [TripRecordingService] (writes) and
+ * [TripRecordingViewModel] (reads) without requiring a bound service.
+ *
+ * The service updates [state] on every relevant change; the ViewModel collects
+ * it as a cold StateFlow.
+ */
+object TripServiceBus {
+
+    data class State(
+        val isRecording: Boolean = false,
+        val currentTripId: Long = -1L,
+        val elapsedSeconds: Long = 0L,
+        val brakingCount: Int = 0,
+        val turningCount: Int = 0,
+        val stoppingCount: Int = 0,
+        val currentSpeedMs: Float = 0f,
+    )
+
+    private val _state = MutableStateFlow(State())
+    val state: StateFlow<State> = _state.asStateFlow()
+
+    /** Called exclusively from [TripRecordingService]. */
+    internal fun update(transform: State.() -> State) {
+        _state.value = _state.value.transform()
+    }
+
+    /** Resets to idle — called when recording stops. */
+    internal fun reset() {
+        _state.value = State()
+    }
+}