Added division of the modules section to updatable, installed and not installed

app/src/main/java/com/topjohnwu/magisk/di/ViewModelsModule.kt

@@ -15,6 +15,6 @@ val viewModelModules = module {
     viewModel { HomeViewModel(get(), get()) }
     viewModel { SuperuserViewModel(get(), get(), get(), get()) }
     viewModel { HideViewModel(get(), get()) }
-    viewModel { ModuleViewModel(get()) }
+    viewModel { ModuleViewModel(get(), get()) }
     viewModel { LogViewModel(get(), get()) }
 }

app/src/main/java/com/topjohnwu/magisk/model/entity/recycler/SectionRvItem.kt

@@ -0,0 +1,11 @@
+package com.topjohnwu.magisk.model.entity.recycler
+
+import com.skoumal.teanity.databinding.ComparableRvItem
+import com.topjohnwu.magisk.R
+
+class SectionRvItem(val text: String) : ComparableRvItem<SectionRvItem>() {
+    override val layoutRes: Int = R.layout.item_section
+
+    override fun contentSameAs(other: SectionRvItem) = itemSameAs(other)
+    override fun itemSameAs(other: SectionRvItem) = text == other.text
+}

app/src/main/java/com/topjohnwu/magisk/ui/module/ModuleViewModel.kt

@@ -1,17 +1,21 @@
 package com.topjohnwu.magisk.ui.module
 
+import android.content.res.Resources
 import android.database.Cursor
+import androidx.annotation.StringRes
 import com.skoumal.teanity.databinding.ComparableRvItem
 import com.skoumal.teanity.extensions.addOnPropertyChangedCallback
 import com.skoumal.teanity.extensions.subscribeK
 import com.skoumal.teanity.util.DiffObservableList
 import com.skoumal.teanity.util.KObservableField
 import com.topjohnwu.magisk.BR
+import com.topjohnwu.magisk.R
 import com.topjohnwu.magisk.data.database.RepoDatabaseHelper
 import com.topjohnwu.magisk.model.entity.Module
 import com.topjohnwu.magisk.model.entity.Repo
 import com.topjohnwu.magisk.model.entity.recycler.ModuleRvItem
 import com.topjohnwu.magisk.model.entity.recycler.RepoRvItem
+import com.topjohnwu.magisk.model.entity.recycler.SectionRvItem
 import com.topjohnwu.magisk.model.events.InstallModuleEvent
 import com.topjohnwu.magisk.model.events.OpenChangelogEvent
 import com.topjohnwu.magisk.model.events.OpenFilePickerEvent
@@ -25,7 +29,8 @@ import io.reactivex.Single
 import me.tatarka.bindingcollectionadapter2.OnItemBind
 
 class ModuleViewModel(
-    private val repoDatabase: RepoDatabaseHelper
+    private val repoDatabase: RepoDatabaseHelper,
+    private val resources: Resources
 ) : MagiskViewModel() {
 
     val query = KObservableField("")
@@ -94,8 +99,34 @@ class ModuleViewModel(
                     it.item.description.contains(query, ignoreCase = true)
         }
         .toList()
+        .map { if (query.isEmpty()) it.divide() else it }
         .map { it to itemsRemote.calculateDiff(it) }
 
+    private fun List<RepoRvItem>.divide(): List<ComparableRvItem<*>> {
+        val installed = itemsInstalled.filterIsInstance<ModuleRvItem>()
+        val installedModules = filter { installed.any { item -> it.item.id == item.item.id } }
+
+        fun installedByID(id: String) = installed.firstOrNull { it.item.id == id }
+
+        fun List<RepoRvItem>.filterObsolete() = filter {
+            val module = installedByID(it.item.id) ?: return@filter false
+            module.item.versionCode != it.item.versionCode
+        }
+
+        val resultObsolete = installedModules.filterObsolete()
+        val resultInstalled = installedModules - resultObsolete
+        val resultRemote = toList() - installedModules
+
+        fun buildList(@StringRes text: Int, list: List<RepoRvItem>): List<ComparableRvItem<*>> {
+            return if (list.isEmpty()) list
+            else listOf(SectionRvItem(resources.getString(text))) + list
+        }
+
+        return buildList(R.string.update_available, resultObsolete) +
+                buildList(R.string.installed, resultInstalled) +
+                buildList(R.string.not_installed, resultRemote)
+    }
+
     private fun <Result> Cursor.toList(transformer: (Cursor) -> Result): List<Result> {
         val out = mutableListOf<Result>()
         while (moveToNext()) out.add(transformer(this))

app/src/main/res/layout/item_section.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <data>
+
+        <variable
+            name="item"
+            type="com.topjohnwu.magisk.model.entity.recycler.SectionRvItem" />
+
+        <variable
+            name="viewModel"
+            type="Object" />
+
+    </data>
+
+    <androidx.appcompat.widget.AppCompatTextView
+        style="@style/Widget.Text.SectionTitle"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@{item.text}"
+        tools:text="@string/update_available" />
+
+</layout>