add cam permission check

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

app/src/main/java/com/nextcloud/talk/controllers/ChatController.kt

@@ -991,6 +991,17 @@ class ChatController(args: Bundle) :
         }
     }
 
+    private fun isCameraPermissionGranted(): Boolean {
+        return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            return PermissionChecker.checkSelfPermission(
+                context!!,
+                Manifest.permission.CAMERA
+            ) == PermissionChecker.PERMISSION_GRANTED
+        } else {
+            true
+        }
+    }
+
     private fun startAudioRecording(file: String) {
         binding.messageInputView.audioRecordDuration.base = SystemClock.elapsedRealtime()
         binding.messageInputView.audioRecordDuration.start()
@@ -1080,6 +1091,15 @@ class ChatController(args: Bundle) :
         )
     }
 
+    private fun requestCameraPermissions() {
+        requestPermissions(
+            arrayOf(
+                Manifest.permission.CAMERA
+            ),
+            REQUEST_CAMERA_PERMISSION
+        )
+    }
+
     private fun checkReadOnlyState() {
         if (currentConversation != null && isAlive()) {
             if (currentConversation?.shouldShowLobby(conversationUser) ?: false ||
@@ -1275,6 +1295,15 @@ class ChatController(args: Bundle) :
                     Toast.LENGTH_LONG
                 ).show()
             }
+        } else if (requestCode == REQUEST_CAMERA_PERMISSION) {
+            if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+                Log.d(TAG, "launch cam activity since permission for cam has been granted")
+                startActivityForResult(TakePhotoActivity.createIntent(context!!), REQUEST_CODE_PICK_CAMERA)
+            } else {
+                Toast
+                    .makeText(context, context?.getString(R.string.read_storage_no_permission), Toast.LENGTH_LONG)
+                    .show()
+            }
         }
     }
 
@@ -2572,7 +2601,11 @@ class ChatController(args: Bundle) :
     }
 
     fun sendPictureFromCamIntent() {
-        startActivityForResult(TakePhotoActivity.createIntent(context!!), REQUEST_CODE_PICK_CAMERA)
+        if (!isCameraPermissionGranted()) {
+            requestCameraPermissions()
+        } else {
+            startActivityForResult(TakePhotoActivity.createIntent(context!!), REQUEST_CODE_PICK_CAMERA)
+        }
     }
 
     companion object {
@@ -2589,6 +2622,7 @@ class ChatController(args: Bundle) :
         private const val AGE_THREHOLD_FOR_DELETE_MESSAGE: Int = 21600000 // (6 hours in millis = 6 * 3600 * 1000)
         private const val REQUEST_CODE_CHOOSE_FILE: Int = 555
         private const val REQUEST_RECORD_AUDIO_PERMISSION = 222
+        private const val REQUEST_CAMERA_PERMISSION = 223
         private const val REQUEST_CODE_PICK_CAMERA: Int = 333
         private const val OBJECT_MESSAGE: String = "{object}"
         private const val MINIMUM_VOICE_RECORD_DURATION: Int = 1000

app/src/main/res/values/strings.xml

@@ -478,4 +478,5 @@
     <string name="take_photo_switch_camera">Switch camera</string>
     <string name="take_photo_toggle_torch">Toggle torch</string>
     <string name="take_photo_error_deleting_picture">Error taking picture</string>
+    <string name="take_photo_permission">Taking a photo is not possible without permissions</string>
 </resources>