Added permission request event

app/src/main/java/com/topjohnwu/magisk/model/permissions/PermissionRequestBuilder.kt

@@ -0,0 +1,40 @@
+package com.topjohnwu.magisk.model.permissions
+
+typealias SimpleCallback = () -> Unit
+typealias PermissionRationaleCallback = (List<String>) -> Unit
+
+class PermissionRequestBuilder {
+
+    private var onSuccessCallback: SimpleCallback = {}
+    private var onFailureCallback: SimpleCallback = {}
+    private var onShowRationaleCallback: PermissionRationaleCallback = {}
+
+    fun onSuccess(callback: SimpleCallback) {
+        onSuccessCallback = callback
+    }
+
+    fun onFailure(callback: SimpleCallback) {
+        onFailureCallback = callback
+    }
+
+    fun onShowRationale(callback: PermissionRationaleCallback) {
+        onShowRationaleCallback = callback
+    }
+
+    fun build(): PermissionRequest {
+        return PermissionRequest(onSuccessCallback, onFailureCallback, onShowRationaleCallback)
+    }
+
+}
+
+class PermissionRequest(
+    private val onSuccessCallback: SimpleCallback,
+    private val onFailureCallback: SimpleCallback,
+    private val onShowRationaleCallback: PermissionRationaleCallback
+) {
+
+    fun onSuccess() = onSuccessCallback()
+    fun onFailure() = onFailureCallback()
+    fun onShowRationale(permissions: List<String>) = onShowRationaleCallback(permissions)
+
+}

app/src/main/java/com/topjohnwu/magisk/ui/base/MagiskActivity.kt

@@ -7,14 +7,21 @@ import androidx.appcompat.app.AppCompatDelegate
 import androidx.core.net.toUri
 import androidx.databinding.ViewDataBinding
 import androidx.fragment.app.Fragment
+import com.karumi.dexter.Dexter
+import com.karumi.dexter.MultiplePermissionsReport
+import com.karumi.dexter.PermissionToken
+import com.karumi.dexter.listener.PermissionRequest
+import com.karumi.dexter.listener.multi.MultiplePermissionsListener
 import com.ncapdevi.fragnav.FragNavController
 import com.ncapdevi.fragnav.FragNavTransactionOptions
 import com.skoumal.teanity.viewevents.ViewEvent
 import com.topjohnwu.magisk.Config
+import com.topjohnwu.magisk.model.events.PermissionEvent
 import com.topjohnwu.magisk.model.events.ViewActionEvent
 import com.topjohnwu.magisk.model.navigation.MagiskAnimBuilder
 import com.topjohnwu.magisk.model.navigation.MagiskNavigationEvent
 import com.topjohnwu.magisk.model.navigation.Navigator
+import com.topjohnwu.magisk.model.permissions.PermissionRequestBuilder
 import com.topjohnwu.magisk.utils.Utils
 import timber.log.Timber
 import kotlin.reflect.KClass
@@ -64,6 +71,13 @@ abstract class MagiskActivity<ViewModel : MagiskViewModel, Binding : ViewDataBin
         when (event) {
             is MagiskNavigationEvent -> navigateTo(event)
             is ViewActionEvent -> event.action(this)
+            is PermissionEvent -> withPermissions(*event.permissions.toTypedArray()) {
+                onSuccess { event.callback.onNext(true) }
+                onFailure {
+                    event.callback.onNext(false)
+                    event.callback.onError(SecurityException("User refused permissions"))
+                }
+            }
         }
     }
 
@@ -135,6 +149,26 @@ abstract class MagiskActivity<ViewModel : MagiskViewModel, Binding : ViewDataBin
 
     fun openUrl(url: String) = Utils.openLink(this, url.toUri())
 
+    fun withPermissions(vararg permissions: String, builder: PermissionRequestBuilder.() -> Unit) {
+        val request = PermissionRequestBuilder().apply(builder).build()
+        Dexter.withActivity(this)
+            .withPermissions(*permissions)
+            .withListener(object : MultiplePermissionsListener {
+                override fun onPermissionsChecked(report: MultiplePermissionsReport?) =
+                    if (report?.areAllPermissionsGranted() == true) {
+                        request.onSuccess()
+                    } else {
+                        request.onFailure()
+                    }
+
+                override fun onPermissionRationaleShouldBeShown(
+                    permissions: MutableList<PermissionRequest>?,
+                    token: PermissionToken?
+                ) = request.onShowRationale(permissions.orEmpty().map { it.name })
+            })
+            .check()
+    }
+
     private fun FragNavTransactionOptions.Builder.customAnimations(options: MagiskAnimBuilder) =
         customAnimations(options.enter, options.exit, options.popEnter, options.popExit)
 

app/src/main/java/com/topjohnwu/magisk/ui/base/MagiskFragment.kt

@@ -5,9 +5,11 @@ import androidx.databinding.ViewDataBinding
 import androidx.fragment.app.Fragment
 import com.skoumal.teanity.view.TeanityFragment
 import com.skoumal.teanity.viewevents.ViewEvent
+import com.topjohnwu.magisk.model.events.PermissionEvent
 import com.topjohnwu.magisk.model.events.ViewActionEvent
 import com.topjohnwu.magisk.model.navigation.MagiskNavigationEvent
 import com.topjohnwu.magisk.model.navigation.Navigator
+import com.topjohnwu.magisk.model.permissions.PermissionRequestBuilder
 import kotlin.reflect.KClass
 
 
@@ -27,9 +29,20 @@ abstract class MagiskFragment<ViewModel : MagiskViewModel, Binding : ViewDataBin
         when (event) {
             is MagiskNavigationEvent -> navigateTo(event)
             is ViewActionEvent -> event.action(requireActivity())
+            is PermissionEvent -> magiskActivity.withPermissions(*event.permissions.toTypedArray()) {
+                onSuccess { event.callback.onNext(true) }
+                onFailure {
+                    event.callback.onNext(false)
+                    event.callback.onError(SecurityException("User refused permissions"))
+                }
+            }
         }
     }
 
+    fun withPermissions(vararg permissions: String, builder: PermissionRequestBuilder.() -> Unit) {
+        magiskActivity.withPermissions(*permissions, builder = builder)
+    }
+
     fun openLink(url: String) = magiskActivity.openUrl(url)
 
     open fun onBackPressed(): Boolean = false

app/src/main/java/com/topjohnwu/magisk/ui/base/MagiskViewModel.kt

@@ -2,8 +2,11 @@ package com.topjohnwu.magisk.ui.base
 
 import android.app.Activity
 import com.skoumal.teanity.viewmodel.LoadingViewModel
+import com.topjohnwu.magisk.model.events.PermissionEvent
 import com.topjohnwu.magisk.model.events.ViewActionEvent
 import com.topjohnwu.magisk.utils.Event
+import io.reactivex.Observable
+import io.reactivex.subjects.PublishSubject
 import timber.log.Timber
 
 
@@ -16,4 +19,8 @@ abstract class MagiskViewModel : LoadingViewModel(), Event.AutoListener {
         ViewActionEvent(action).publish()
     }
 
+    fun withPermissions(vararg permissions: String): Observable<Boolean> {
+        val subject = PublishSubject.create<Boolean>()
+        return subject.doOnSubscribe { PermissionEvent(permissions.toList(), subject).publish() }
+    }
 }