Replace PermissionRequestCallback with direct methods

These are much cleaner in Kotlin code.

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

ui/src/main/java/com/wireguard/android/activity/SettingsActivity.kt

@@ -25,10 +25,10 @@ import java.util.Arrays
  * Interface for changing application-global persistent settings.
  */
 class SettingsActivity : ThemeChangeAwareActivity() {
-    private val permissionRequestCallbacks = SparseArray<PermissionRequestCallback>()
+    private val permissionRequestCallbacks = SparseArray<(permissions: Array<String>, granted: IntArray) -> Unit>()
     private var permissionRequestCounter = 0
 
-    fun ensurePermissions(permissions: Array<String>, cb: PermissionRequestCallback) {
+    fun ensurePermissions(permissions: Array<String>, cb: (permissions: Array<String>, granted: IntArray) -> Unit) {
         val needPermissions: MutableList<String> = ArrayList(permissions.size)
         permissions.forEach {
             if (ContextCompat.checkSelfPermission(this, it) != PackageManager.PERMISSION_GRANTED) {
@@ -38,7 +38,7 @@ class SettingsActivity : ThemeChangeAwareActivity() {
         if (needPermissions.isEmpty()) {
             val granted = IntArray(permissions.size)
             Arrays.fill(granted, PackageManager.PERMISSION_GRANTED)
-            cb.done(permissions, granted)
+            cb.invoke(permissions, granted)
             return
         }
         val idx = permissionRequestCounter++
@@ -70,14 +70,10 @@ class SettingsActivity : ThemeChangeAwareActivity() {
         val f = permissionRequestCallbacks[requestCode]
         if (f != null) {
             permissionRequestCallbacks.remove(requestCode)
-            f.done(permissions, grantResults)
+            f.invoke(permissions, grantResults)
         }
     }
 
-    interface PermissionRequestCallback {
-        fun done(permissions: Array<String>, grantResults: IntArray)
-    }
-
     class SettingsFragment : PreferenceFragmentCompat() {
         override fun onCreatePreferences(savedInstanceState: Bundle?, key: String?) {
             addPreferencesFromResource(R.xml.preferences)

ui/src/main/java/com/wireguard/android/preference/LogExporterPreference.kt

@@ -13,7 +13,6 @@ import androidx.preference.Preference
 import com.google.android.material.snackbar.Snackbar
 import com.wireguard.android.Application
 import com.wireguard.android.R
-import com.wireguard.android.activity.SettingsActivity
 import com.wireguard.android.util.DownloadsFileSaver
 import com.wireguard.android.util.ErrorMessages
 import com.wireguard.android.util.FragmentUtils
@@ -82,15 +81,12 @@ class LogExporterPreference(context: Context, attrs: AttributeSet?) : Preference
 
     override fun onClick() {
         FragmentUtils.getPrefActivity(this)
-                .ensurePermissions(arrayOf(Manifest.permission.WRITE_EXTERNAL_STORAGE),
+                .ensurePermissions(arrayOf(Manifest.permission.WRITE_EXTERNAL_STORAGE)) { _, grantResults ->
-                        object: SettingsActivity.PermissionRequestCallback {
-                            override fun done(permissions: Array<String>, grantResults: IntArray) {
                     if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                         isEnabled = false
                         exportLog()
                     }
                 }
-                        })
     }
 
     companion object {

ui/src/main/java/com/wireguard/android/preference/ZipExporterPreference.kt

@@ -13,16 +13,12 @@ import androidx.preference.Preference
 import com.google.android.material.snackbar.Snackbar
 import com.wireguard.android.Application
 import com.wireguard.android.R
-import com.wireguard.android.activity.SettingsActivity
 import com.wireguard.android.model.ObservableTunnel
 import com.wireguard.android.util.DownloadsFileSaver
 import com.wireguard.android.util.ErrorMessages
 import com.wireguard.android.util.FragmentUtils
-import com.wireguard.android.util.ObservableSortedKeyedList
-import com.wireguard.config.Config
 import java9.util.concurrent.CompletableFuture
 import java.nio.charset.StandardCharsets
-import java.util.ArrayList
 import java.util.zip.ZipEntry
 import java.util.zip.ZipOutputStream
 
@@ -86,15 +82,12 @@ class ZipExporterPreference(context: Context, attrs: AttributeSet?) : Preference
 
     override fun onClick() {
         FragmentUtils.getPrefActivity(this)
-                .ensurePermissions(arrayOf(Manifest.permission.WRITE_EXTERNAL_STORAGE),
+                .ensurePermissions(arrayOf(Manifest.permission.WRITE_EXTERNAL_STORAGE)) { _, grantResults ->
-                        object : SettingsActivity.PermissionRequestCallback {
-                            override fun done(permissions: Array<String>, grantResults: IntArray) {
                     if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                         isEnabled = false
                         exportZip()
                     }
                 }
-                        })
     }
 
     companion object {