Added install implementation

app/src/main/java/com/topjohnwu/magisk/ui/install/InstallFragment.kt

@@ -1,8 +1,10 @@
 package com.topjohnwu.magisk.ui.install
 
+import android.content.Intent
 import android.graphics.Insets
 import com.topjohnwu.magisk.R
 import com.topjohnwu.magisk.databinding.FragmentInstallMd2Binding
+import com.topjohnwu.magisk.model.events.RequestFileEvent
 import com.topjohnwu.magisk.redesign.compat.CompatFragment
 import org.koin.androidx.viewmodel.ext.android.viewModel
 
@@ -13,6 +15,11 @@ class InstallFragment : CompatFragment<InstallViewModel, FragmentInstallMd2Bindi
 
     override fun consumeSystemWindowInsets(insets: Insets) = insets
 
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        super.onActivityResult(requestCode, resultCode, data)
+        viewModel.data.value = RequestFileEvent.resolve(requestCode, resultCode, data)
+    }
+
     override fun onStart() {
         super.onStart()
         requireActivity().setTitle(R.string.install)

app/src/main/java/com/topjohnwu/magisk/ui/install/InstallViewModel.kt

@@ -1,15 +1,56 @@
 package com.topjohnwu.magisk.ui.install
 
+import android.net.Uri
+import com.topjohnwu.magisk.R
+import com.topjohnwu.magisk.extensions.addOnPropertyChangedCallback
+import com.topjohnwu.magisk.model.download.DownloadService
+import com.topjohnwu.magisk.model.entity.internal.Configuration
+import com.topjohnwu.magisk.model.entity.internal.DownloadSubject
+import com.topjohnwu.magisk.model.events.RequestFileEvent
 import com.topjohnwu.magisk.redesign.compat.CompatViewModel
 import com.topjohnwu.magisk.utils.KObservableField
+import com.topjohnwu.superuser.Shell
+import com.topjohnwu.superuser.ShellUtils
+import org.koin.core.get
 
 class InstallViewModel : CompatViewModel() {
 
+    val isRooted = Shell.rootAccess()
+    val isAB = isABDevice()
+
     val step = KObservableField(0)
     val method = KObservableField(-1)
 
+    var data = KObservableField<Uri?>(null)
+
+    init {
+        method.addOnPropertyChangedCallback {
+            if (method.value == R.id.method_patch) {
+                RequestFileEvent().publish()
+            }
+        }
+    }
+
     fun step(nextStep: Int) {
         step.value = nextStep
     }
 
+    fun install() = DownloadService(get()) {
+        subject = DownloadSubject.Magisk(resolveConfiguration())
+    }
+
+    // ---
+
+    private fun resolveConfiguration() = when (method.value) {
+        R.id.method_download -> Configuration.Download
+        R.id.method_patch -> Configuration.Patch(data.value!!)
+        R.id.method_direct -> Configuration.Flash.Primary
+        R.id.method_inactive_slot -> Configuration.Flash.Secondary
+        else -> throw IllegalArgumentException("Unknown value")
+    }
+
+    private fun isABDevice() = ShellUtils
+        .fastCmd("grep_prop ro.build.ab_update")
+        .let { it.isNotEmpty() && it.toBoolean() }
+
 }