- [shared] Implement network state monitoring

- [android] UI reacts to network state
- [ios] UI reacts to network state

2 files changed, 58 insertions, 1 deletions

diff --git a/shared/src/androidMain/AndroidManifest.xml b/shared/src/androidMain/AndroidManifest.xml
index 568741e..f0f34af 100644
--- a/shared/src/androidMain/AndroidManifest.xml
+++ b/shared/src/androidMain/AndroidManifest.xml
@@ -1,2 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest />
\ No newline at end of file
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+</manifest>
\ No newline at end of file
diff --git a/shared/src/androidMain/kotlin/mx/trackermap/TrackerMap/controllers/NetworkController.kt b/shared/src/androidMain/kotlin/mx/trackermap/TrackerMap/controllers/NetworkController.kt
new file mode 100644
index 0000000..eecd7de
--- /dev/null
+++ b/shared/src/androidMain/kotlin/mx/trackermap/TrackerMap/controllers/NetworkController.kt
@@ -0,0 +1,55 @@
+package mx.trackermap.TrackerMap.controllers
+
+import android.content.Context
+import android.net.ConnectivityManager
+import android.net.Network
+import android.net.NetworkCapabilities
+import android.net.NetworkRequest
+import android.os.Build
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import mx.trackermap.TrackerMap.Injectable
+
+actual class NetworkController(context: Context): Injectable {
+    private val networkRequest = NetworkRequest.Builder().build()
+    private val connectivityManager: ConnectivityManager
+    private val _networkAvailable = MutableStateFlow<Boolean?>(null)
+    actual val networkAvailable = _networkAvailable.asStateFlow()
+
+    private val networkCallback = object: ConnectivityManager.NetworkCallback() {
+        override fun onCapabilitiesChanged(
+            network: Network,
+            networkCapabilities: NetworkCapabilities
+        ) {
+            super.onCapabilitiesChanged(network, networkCapabilities)
+            _networkAvailable.value = checkNetworkAccess(networkCapabilities)
+        }
+
+        override fun onLost(network: Network) {
+            super.onLost(network)
+            _networkAvailable.value = false
+        }
+    }
+
+    init {
+        connectivityManager = context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
+        _networkAvailable.value = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            checkNetworkAccess(connectivityManager.getNetworkCapabilities(connectivityManager.activeNetwork))
+        } else {
+            connectivityManager.activeNetworkInfo?.isConnected == true
+        }
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+            connectivityManager.registerDefaultNetworkCallback(networkCallback)
+        } else {
+            connectivityManager.registerNetworkCallback(networkRequest, networkCallback)
+        }
+    }
+
+    private fun checkNetworkAccess(capabilities: NetworkCapabilities?) =
+        capabilities != null
+                && capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
+                && if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED)
+        } else true
+}
\ No newline at end of file