From d77a70902bab28388493575b0adb97833588d9bf Mon Sep 17 00:00:00 2001
From: rayan <rayan.boucheny@epfl.ch>
Date: Sun, 2 Jun 2024 18:44:12 +0200
Subject: [PATCH] feat: added gps location on the map

---
 app/src/main/AndroidManifest.xml              |  2 +
 .../ui/screens/event/maptab/EventMapScreen.kt | 42 +++++++++++++++++++
 2 files changed, 44 insertions(+)

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index f04aad7ee..62f8c39aa 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -9,6 +9,8 @@
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"
         android:maxSdkVersion="28"/>
     <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
+    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
 
     <application
         android:allowBackup="true"
diff --git a/app/src/main/java/com/github/se/assocify/ui/screens/event/maptab/EventMapScreen.kt b/app/src/main/java/com/github/se/assocify/ui/screens/event/maptab/EventMapScreen.kt
index a52ee0ffe..c7ce180b0 100644
--- a/app/src/main/java/com/github/se/assocify/ui/screens/event/maptab/EventMapScreen.kt
+++ b/app/src/main/java/com/github/se/assocify/ui/screens/event/maptab/EventMapScreen.kt
@@ -1,10 +1,15 @@
 package com.github.se.assocify.ui.screens.event.maptab
 
+import android.Manifest
 import android.annotation.SuppressLint
+import android.app.Activity
+import android.content.Context
+import android.content.pm.PackageManager
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.DisposableEffect
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.remember
@@ -13,6 +18,8 @@ import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.platform.LocalLifecycleOwner
 import androidx.compose.ui.platform.testTag
 import androidx.compose.ui.viewinterop.AndroidView
+import androidx.core.app.ActivityCompat
+import androidx.core.content.ContextCompat
 import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.LifecycleEventObserver
 import androidx.lifecycle.LifecycleObserver
@@ -30,11 +37,17 @@ import org.osmdroid.views.CustomZoomButtonsController
 import org.osmdroid.views.MapView
 import org.osmdroid.views.overlay.Marker
 import org.osmdroid.views.overlay.TilesOverlay
+import org.osmdroid.views.overlay.mylocation.GpsMyLocationProvider
+import org.osmdroid.views.overlay.mylocation.MyLocationNewOverlay
 
 // Initial position of the map (EPFL Agora)
 private val INITIAL_POSITION = GeoPoint(46.518726, 6.566613)
 // Initial zoom of the map (Zoom made to be focused on the EPFL campus)
 private const val INITIAL_ZOOM = 17.0
+// The location overlay to display the user's location
+private var myLocationOverlay: MyLocationNewOverlay? = null
+// Permission code for accessing GPS location
+const val LOCATION_PERMISSION_REQUEST_CODE = 1000
 
 /** A screen that displays a map of the event: location with the associated tasks. */
 @Composable
@@ -93,6 +106,18 @@ fun rememberMapViewWithLifecycle(): MapView {
     onDispose { lifecycle.removeObserver(lifecycleObserver) }
   }
 
+  // Request location permissions and initialize myLocationOverlay
+  LaunchedEffect(Unit) {
+    val permissionGranted = requestLocationPermission(context)
+    if (permissionGranted) {
+      val myLocationProvider = GpsMyLocationProvider(context)
+      myLocationProvider.startLocationProvider(null)
+      myLocationOverlay = MyLocationNewOverlay(myLocationProvider, mapView)
+      myLocationOverlay?.enableMyLocation()
+      mapView.overlays.add(myLocationOverlay)
+    }
+  }
+
   return mapView
 }
 
@@ -154,6 +179,23 @@ fun EPFLMapView(
       factory = { mapViewState }, modifier = modifier, update = { view -> onLoad?.invoke(view) })
 }
 
+/**
+ * Displays a permission dialog to request location permission
+ *
+ * @param context the context to display the dialog
+ */
+fun requestLocationPermission(context: Context): Boolean {
+  if (ContextCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) !=
+      PackageManager.PERMISSION_GRANTED) {
+    ActivityCompat.requestPermissions(
+        context as Activity,
+        arrayOf(Manifest.permission.ACCESS_FINE_LOCATION),
+        LOCATION_PERMISSION_REQUEST_CODE)
+    return false
+  }
+  return true
+}
+
 /**
  * The custom tile source from the EPFL plan API.
  *