Added caching repositories to device

app/src/main/java/com/topjohnwu/magisk/data/repository/ModuleRepository.kt

@@ -1,12 +1,15 @@
 package com.topjohnwu.magisk.data.repository
 
 import android.content.Context
+import com.skoumal.teanity.extensions.subscribeK
+import com.topjohnwu.magisk.data.database.RepositoryDao
 import com.topjohnwu.magisk.data.network.GithubApiServices
 import com.topjohnwu.magisk.data.network.GithubRawApiServices
 import com.topjohnwu.magisk.data.network.GithubServices
 import com.topjohnwu.magisk.model.entity.GithubRepo
 import com.topjohnwu.magisk.model.entity.toRepository
 import com.topjohnwu.magisk.utils.Utils
+import com.topjohnwu.magisk.utils.toSingle
 import com.topjohnwu.magisk.utils.writeToFile
 import com.topjohnwu.magisk.utils.writeToString
 import io.reactivex.Single
@@ -15,10 +18,15 @@ class ModuleRepository(
     private val context: Context,
     private val apiRaw: GithubRawApiServices,
     private val api: GithubApiServices,
-    private val apiWeb: GithubServices
+    private val apiWeb: GithubServices,
+    private val repoDao: RepositoryDao
 ) {
 
-    fun fetchModules() = fetchAllRepos()
+    fun fetchModules() = Single.fromCallable { repoDao.fetchAll() }
+        .flatMap { if (it.isEmpty()) fetchRemoteRepos() else it.toSingle() }
+        .doOnSuccess { fetchRemoteRepos().subscribeK() } // cache changed for next time or next hot reload
+
+    private fun fetchRemoteRepos() = fetchAllRepos()
         .map {
             it.mapNotNull {
                 runCatching {
@@ -26,6 +34,7 @@ class ModuleRepository(
                 }.getOrNull()
             }
         }
+        .doOnSuccess { repoDao.insert(it) }
 
     fun fetchInstalledModules() = Single.fromCallable { Utils.loadModulesLeanback() }
         .map { it.values.toList() }

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

@@ -6,7 +6,7 @@ import org.koin.dsl.module
 
 val repositoryModule = module {
     single { MagiskRepository(get(), get(), get()) }
-    single { ModuleRepository(get(), get(), get(), get()) }
+    single { ModuleRepository(get(), get(), get(), get(), get()) }
     single { LogRepository(get()) }
     single { AppRepository(get()) }
     single { SettingRepository(get()) }

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

@@ -5,6 +5,7 @@ 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.doOnSuccessUi
 import com.skoumal.teanity.extensions.subscribeK
 import com.skoumal.teanity.util.DiffObservableList
 import com.skoumal.teanity.util.KObservableField
@@ -20,6 +21,7 @@ import com.topjohnwu.magisk.model.events.OpenFilePickerEvent
 import com.topjohnwu.magisk.ui.base.MagiskViewModel
 import com.topjohnwu.magisk.utils.toSingle
 import com.topjohnwu.magisk.utils.update
+import com.topjohnwu.magisk.utils.zip
 import io.reactivex.disposables.Disposable
 import me.tatarka.bindingcollectionadapter2.OnItemBind
 
@@ -54,7 +56,16 @@ class ModuleViewModel(
     fun downloadPressed(item: RepoRvItem) = InstallModuleEvent(item.item).publish()
 
     fun refresh() {
-        moduleRepo.fetchModules()
+        val updateInstalled = moduleRepo.fetchInstalledModules()
+            .flattenAsFlowable { it }
+            .map { ModuleRvItem(it) }
+            .toList()
+            .map { it to itemsInstalled.calculateDiff(it) }
+            .doOnSuccessUi { itemsInstalled.update(it.first, it.second) }
+
+        val updateRemote = moduleRepo.fetchModules()
+
+        zip(updateInstalled, updateRemote) { _, remote -> remote }
             .flattenAsFlowable { it }
             .map { RepoRvItem(it) }
             .toList()
@@ -62,13 +73,6 @@ class ModuleViewModel(
             .flatMap { queryRaw() }
             .applyViewModel(this)
             .subscribeK { itemsRemote.update(it.first, it.second) }
-
-        moduleRepo.fetchInstalledModules()
-            .flattenAsFlowable { it }
-            .map { ModuleRvItem(it) }
-            .toList()
-            .map { it to itemsInstalled.calculateDiff(it) }
-            .subscribeK { itemsInstalled.update(it.first, it.second) }
     }
 
     private fun query() = queryRaw()