refactor: Use Navigation Safe Args

app/build.gradle.kts

@@ -4,6 +4,7 @@ plugins {
     id("kotlin-android")
     id("kotlinx-serialization")
     id("kotlin-parcelize")
+    id("androidx.navigation.safeargs.kotlin")
 }
 
 android {

app/src/main/java/com/github/libretube/helpers/NavigationHelper.kt

@@ -11,6 +11,7 @@ import androidx.core.os.bundleOf
 import androidx.core.os.postDelayed
 import androidx.fragment.app.commitNow
 import androidx.fragment.app.replace
+import com.github.libretube.NavDirections
 import com.github.libretube.R
 import com.github.libretube.constants.IntentData
 import com.github.libretube.constants.PreferenceKeys
@@ -29,8 +30,7 @@ object NavigationHelper {
         if (channelId == null) return
 
         val activity = ContextHelper.unwrapActivity(context)
-        val bundle = bundleOf(IntentData.channelId to channelId)
-        activity.navController.navigate(R.id.channelFragment, bundle)
+        activity.navController.navigate(NavDirections.openChannel(channelId))
         try {
             if (activity.binding.mainMotionLayout.progress == 0.toFloat()) {
                 activity.binding.mainMotionLayout.transitionToEnd()
@@ -86,11 +86,7 @@ object NavigationHelper {
         if (playlistId == null) return
 
         val activity = ContextHelper.unwrapActivity(context)
-        val bundle = bundleOf(
-            IntentData.playlistId to playlistId,
-            IntentData.playlistType to playlistType
-        )
-        activity.navController.navigate(R.id.playlistFragment, bundle)
+        activity.navController.navigate(NavDirections.openPlaylist(playlistId, playlistType))
     }
 
     /**

app/src/main/java/com/github/libretube/ui/activities/MainActivity.kt

@@ -22,6 +22,7 @@ import androidx.navigation.findNavController
 import androidx.navigation.fragment.NavHostFragment
 import androidx.navigation.ui.setupWithNavController
 import androidx.recyclerview.widget.RecyclerView
+import com.github.libretube.NavDirections
 import com.github.libretube.R
 import com.github.libretube.compat.PictureInPictureCompat
 import com.github.libretube.constants.IntentData
@@ -269,11 +270,8 @@ class MainActivity : BaseActivity() {
         searchView = searchItem.actionView as SearchView
 
         searchView.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
-            override fun onQueryTextSubmit(query: String?): Boolean {
-                navController.navigate(
-                    R.id.searchResultFragment,
-                    bundleOf(IntentData.query to query)
-                )
+            override fun onQueryTextSubmit(query: String): Boolean {
+                navController.navigate(NavDirections.showSearchResults(query))
                 searchView.clearFocus()
                 return true
             }
@@ -406,22 +404,13 @@ class MainActivity : BaseActivity() {
         }
 
         intent?.getStringExtra(IntentData.channelId)?.let {
-            navController.navigate(
-                R.id.channelFragment,
-                bundleOf(IntentData.channelId to it)
-            )
+            navController.navigate(NavDirections.openChannel(channelId = it))
         }
         intent?.getStringExtra(IntentData.channelName)?.let {
-            navController.navigate(
-                R.id.channelFragment,
-                bundleOf(IntentData.channelName to it)
-            )
+            navController.navigate(NavDirections.openChannel(channelName = it))
         }
         intent?.getStringExtra(IntentData.playlistId)?.let {
-            navController.navigate(
-                R.id.playlistFragment,
-                bundleOf(IntentData.playlistId to it)
-            )
+            navController.navigate(NavDirections.openPlaylist(playlistId = it))
         }
         intent?.getStringExtra(IntentData.videoId)?.let {
             NavigationHelper.navigateVideo(

app/src/main/java/com/github/libretube/ui/fragments/ChannelFragment.kt

@@ -10,6 +10,7 @@ import androidx.core.view.children
 import androidx.core.view.isGone
 import androidx.core.view.isVisible
 import androidx.lifecycle.lifecycleScope
+import androidx.navigation.fragment.navArgs
 import androidx.recyclerview.widget.GridLayoutManager
 import com.github.libretube.R
 import com.github.libretube.api.RetrofitInstance
@@ -32,16 +33,17 @@ import com.github.libretube.ui.dialogs.ShareDialog
 import com.github.libretube.ui.extensions.setupSubscriptionButton
 import com.github.libretube.ui.sheets.AddChannelToGroupSheet
 import com.github.libretube.util.deArrow
-import java.io.IOException
-import kotlin.math.ceil
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import retrofit2.HttpException
+import java.io.IOException
+import kotlin.math.ceil
 
 class ChannelFragment : DynamicLayoutManagerFragment() {
     private var _binding: FragmentChannelBinding? = null
     private val binding get() = _binding!!
+    private val args by navArgs<ChannelFragmentArgs>()
 
     private var channelId: String? = null
     private var channelName: String? = null
@@ -61,12 +63,8 @@ class ChannelFragment : DynamicLayoutManagerFragment() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        arguments?.let {
-            channelId = it.getString(IntentData.channelId)?.toID()
-            channelName = it.getString(IntentData.channelName)
-                ?.replace("/c/", "")
-                ?.replace("/user/", "")
-        }
+        channelId = args.channelId?.toID()
+        channelName = args.channelName?.replace("/c/", "")?.replace("/user/", "")
     }
 
     override fun onCreateView(

app/src/main/java/com/github/libretube/ui/fragments/PlayerFragment.kt

@@ -47,6 +47,7 @@ import androidx.media3.exoplayer.ExoPlayer
 import androidx.media3.exoplayer.hls.HlsMediaSource
 import androidx.media3.exoplayer.trackselection.DefaultTrackSelector
 import androidx.recyclerview.widget.LinearLayoutManager
+import com.github.libretube.NavDirections
 import com.github.libretube.R
 import com.github.libretube.api.CronetHelper
 import com.github.libretube.api.JsonHelper
@@ -114,16 +115,16 @@ import com.github.libretube.util.TextUtils
 import com.github.libretube.util.TextUtils.toTimeInSeconds
 import com.github.libretube.util.YoutubeHlsPlaylistParser
 import com.github.libretube.util.deArrow
-import java.io.IOException
-import java.util.*
-import java.util.concurrent.Executors
-import kotlin.math.abs
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import kotlinx.serialization.encodeToString
 import retrofit2.HttpException
+import java.io.IOException
+import java.util.*
+import java.util.concurrent.Executors
+import kotlin.math.abs
 
 @androidx.annotation.OptIn(androidx.media3.common.util.UnstableApi::class)
 class PlayerFragment : Fragment(), OnlinePlayerOptions {
@@ -627,8 +628,7 @@ class PlayerFragment : Fragment(), OnlinePlayerOptions {
             if (!this::streams.isInitialized) return@setOnClickListener
 
             val activity = view?.context as MainActivity
-            val bundle = bundleOf(IntentData.channelId to streams.uploaderUrl)
-            activity.navController.navigate(R.id.channelFragment, bundle)
+            activity.navController.navigate(NavDirections.openChannel(streams.uploaderUrl))
             activity.binding.mainMotionLayout.transitionToEnd()
             binding.playerMotionLayout.transitionToEnd()
         }

app/src/main/java/com/github/libretube/ui/fragments/PlaylistFragment.kt

@@ -13,9 +13,11 @@ import androidx.core.view.isVisible
 import androidx.core.view.updatePadding
 import androidx.fragment.app.activityViewModels
 import androidx.lifecycle.lifecycleScope
+import androidx.navigation.fragment.navArgs
 import androidx.recyclerview.widget.GridLayoutManager
 import androidx.recyclerview.widget.ItemTouchHelper
 import androidx.recyclerview.widget.RecyclerView
+import com.github.libretube.NavDirections
 import com.github.libretube.R
 import com.github.libretube.api.PlaylistsHelper
 import com.github.libretube.api.RetrofitInstance
@@ -29,7 +31,6 @@ import com.github.libretube.enums.PlaylistType
 import com.github.libretube.extensions.TAG
 import com.github.libretube.extensions.ceilHalf
 import com.github.libretube.extensions.dpToPx
-import com.github.libretube.extensions.serializable
 import com.github.libretube.extensions.toID
 import com.github.libretube.extensions.toastFromMainDispatcher
 import com.github.libretube.helpers.ImageHelper
@@ -51,9 +52,10 @@ import kotlinx.coroutines.withContext
 class PlaylistFragment : DynamicLayoutManagerFragment() {
     private var _binding: FragmentPlaylistBinding? = null
     private val binding get() = _binding!!
+    private val args by navArgs<PlaylistFragmentArgs>()
 
     // general playlist information
-    private var playlistId: String? = null
+    private lateinit var playlistId: String
     private var playlistName: String? = null
     private var playlistType = PlaylistType.PUBLIC
 
@@ -75,10 +77,8 @@ class PlaylistFragment : DynamicLayoutManagerFragment() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        arguments?.let {
-            playlistId = it.getString(IntentData.playlistId)!!.toID()
-            playlistType = it.serializable(IntentData.playlistType) ?: PlaylistType.PUBLIC
-        }
+        playlistId = args.playlistId
+        playlistType = args.playlistType
     }
 
     override fun onCreateView(
@@ -100,7 +100,7 @@ class PlaylistFragment : DynamicLayoutManagerFragment() {
         binding.playlistProgress.isVisible = true
 
         isBookmarked = runBlocking(Dispatchers.IO) {
-            DatabaseHolder.Database.playlistBookmarkDao().includes(playlistId!!)
+            DatabaseHolder.Database.playlistBookmarkDao().includes(playlistId)
         }
         updateBookmarkRes()
 
@@ -127,7 +127,7 @@ class PlaylistFragment : DynamicLayoutManagerFragment() {
         lifecycleScope.launch {
             val response = try {
                 withContext(Dispatchers.IO) {
-                    PlaylistsHelper.getPlaylist(playlistId!!)
+                    PlaylistsHelper.getPlaylist(playlistId)
                 }
             } catch (e: Exception) {
                 Log.e(TAG(), e.toString())
@@ -146,10 +146,8 @@ class PlaylistFragment : DynamicLayoutManagerFragment() {
 
             binding.playlistInfo.text = getChannelAndVideoString(response, response.videos)
             binding.playlistInfo.setOnClickListener {
-                (context as MainActivity).navController.navigate(
-                    R.id.channelFragment,
-                    bundleOf(IntentData.channelId to response.uploaderUrl?.toID())
-                )
+                (context as MainActivity).navController
+                    .navigate(NavDirections.openChannel(response.uploaderUrl))
             }
 
             binding.playlistDescription.text = response.description?.parseAsHtml()
@@ -162,7 +160,7 @@ class PlaylistFragment : DynamicLayoutManagerFragment() {
             binding.optionsMenu.setOnClickListener {
                 val sheet = PlaylistOptionsBottomSheet()
                 sheet.arguments = bundleOf(
-                    IntentData.playlistId to playlistId.orEmpty(),
+                    IntentData.playlistId to playlistId,
                     IntentData.playlistName to playlistName.orEmpty(),
                     IntentData.playlistType to playlistType
                 )
@@ -214,10 +212,10 @@ class PlaylistFragment : DynamicLayoutManagerFragment() {
                     lifecycleScope.launch(Dispatchers.IO) {
                         if (!isBookmarked) {
                             DatabaseHolder.Database.playlistBookmarkDao()
-                                .deleteById(playlistId!!)
+                                .deleteById(playlistId)
                         } else {
                             DatabaseHolder.Database.playlistBookmarkDao()
-                                .insert(response.toPlaylistBookmark(playlistId!!))
+                                .insert(response.toPlaylistBookmark(playlistId))
                         }
                     }
                 }
@@ -295,7 +293,7 @@ class PlaylistFragment : DynamicLayoutManagerFragment() {
         playlistAdapter = PlaylistAdapter(
             playlistFeed,
             videos.toMutableList(),
-            playlistId!!,
+            playlistId,
             playlistType
         )
         binding.playlistRecView.adapter = playlistAdapter
@@ -373,9 +371,9 @@ class PlaylistFragment : DynamicLayoutManagerFragment() {
                 withContext(Dispatchers.IO) {
                     // load locally stored playlists with the auth api
                     if (playlistType == PlaylistType.PRIVATE) {
-                        RetrofitInstance.authApi.getPlaylistNextPage(playlistId!!, nextPage!!)
+                        RetrofitInstance.authApi.getPlaylistNextPage(playlistId, nextPage!!)
                     } else {
-                        RetrofitInstance.api.getPlaylistNextPage(playlistId!!, nextPage!!)
+                        RetrofitInstance.api.getPlaylistNextPage(playlistId, nextPage!!)
                     }
                 }
             } catch (e: Exception) {

app/src/main/java/com/github/libretube/ui/fragments/SearchResultFragment.kt

@@ -8,10 +8,10 @@ import android.view.ViewGroup
 import androidx.core.view.isGone
 import androidx.core.view.isVisible
 import androidx.lifecycle.lifecycleScope
+import androidx.navigation.fragment.navArgs
 import androidx.recyclerview.widget.GridLayoutManager
 import com.github.libretube.R
 import com.github.libretube.api.RetrofitInstance
-import com.github.libretube.constants.IntentData
 import com.github.libretube.constants.PreferenceKeys
 import com.github.libretube.databinding.FragmentSearchResultBinding
 import com.github.libretube.db.DatabaseHelper
@@ -36,18 +36,13 @@ import okhttp3.HttpUrl.Companion.toHttpUrlOrNull
 class SearchResultFragment : DynamicLayoutManagerFragment() {
     private var _binding: FragmentSearchResultBinding? = null
     private val binding get() = _binding!!
+    private val args by navArgs<SearchResultFragmentArgs>()
 
     private var nextPage: String? = null
-    private var query = ""
 
     private lateinit var searchAdapter: SearchAdapter
     private var searchFilter = "all"
 
-    override fun onCreate(savedInstanceState: Bundle?) {
-        super.onCreate(savedInstanceState)
-        query = arguments?.getString(IntentData.query).toString()
-    }
-
     override fun onCreateView(
         inflater: LayoutInflater,
         container: ViewGroup?,
@@ -66,10 +61,10 @@ class SearchResultFragment : DynamicLayoutManagerFragment() {
 
         // fixes a bug that the search query will stay the old one when searching for multiple
         // different queries in a row and navigating to the previous ones through back presses
-        (context as MainActivity).setQuerySilent(query)
+        (context as MainActivity).setQuerySilent(args.query)
 
         // add the query to the history
-        addToHistory(query)
+        addToHistory(args.query)
 
         // filter options
         binding.filterChipGroup.setOnCheckedStateChangeListener { _, _ ->
@@ -109,11 +104,11 @@ class SearchResultFragment : DynamicLayoutManagerFragment() {
             var timeStamp: Long? = null
 
             // parse search URLs from YouTube entered in the search bar
-            val searchQuery = query.toHttpUrlOrNull()?.let {
-                val videoId = TextUtils.getVideoIdFromUrl(it.toString()) ?: query
+            val searchQuery = args.query.toHttpUrlOrNull()?.let {
+                val videoId = TextUtils.getVideoIdFromUrl(it.toString()) ?: args.query
                 timeStamp = it.queryParameter("t")?.toTimeInSeconds()
                 "${ShareDialog.YOUTUBE_FRONTEND_URL}/watch?v=$videoId"
-            } ?: query
+            } ?: args.query
 
             view?.let { context?.hideKeyboard(it) }
             val response = try {
@@ -146,7 +141,7 @@ class SearchResultFragment : DynamicLayoutManagerFragment() {
             val response = try {
                 withContext(Dispatchers.IO) {
                     RetrofitInstance.api.getSearchResultsNextPage(
-                        query,
+                        args.query,
                         searchFilter,
                         nextPage!!
                     ).apply {

app/src/main/res/navigation/nav.xml

@@ -33,17 +33,43 @@
         android:id="@+id/searchResultFragment"
         android:name="com.github.libretube.ui.fragments.SearchResultFragment"
         android:label="fragment_search"
-        tools:layout="@layout/fragment_search_result" />
+        tools:layout="@layout/fragment_search_result">
+        <argument
+            android:name="query"
+            app:argType="string"
+            app:nullable="false" />
+    </fragment>
     <fragment
         android:id="@+id/channelFragment"
         android:name="com.github.libretube.ui.fragments.ChannelFragment"
         android:label="channel"
-        tools:layout="@layout/fragment_channel" />
+        tools:layout="@layout/fragment_channel" >
+        <argument
+            android:name="channelId"
+            app:argType="string"
+            app:nullable="true"
+            android:defaultValue="@null" />
+        <argument
+            android:name="channelName"
+            app:argType="string"
+            app:nullable="true"
+            android:defaultValue="@null" />
+    </fragment>
     <fragment
         android:id="@+id/playlistFragment"
         android:name="com.github.libretube.ui.fragments.PlaylistFragment"
         android:label="fragment_playlist"
-        tools:layout="@layout/fragment_playlist" />
+        tools:layout="@layout/fragment_playlist">
+        <argument
+            android:name="playlistId"
+            app:argType="string"
+            app:nullable="false" />
+        <argument
+            android:name="playlistType"
+            app:argType="com.github.libretube.enums.PlaylistType"
+            app:nullable="false"
+            android:defaultValue="PUBLIC" />
+    </fragment>
     <fragment
         android:id="@+id/watchHistoryFragment"
         android:name="com.github.libretube.ui.fragments.WatchHistoryFragment"
@@ -54,4 +80,11 @@
         android:name="com.github.libretube.ui.fragments.DownloadsFragment"
         android:label="@string/downloads"
         tools:layout="@layout/fragment_downloads" />
+
+    <action android:id="@+id/openChannel"
+        app:destination="@id/channelFragment" />
+    <action android:id="@+id/openPlaylist"
+        app:destination="@id/playlistFragment" />
+    <action android:id="@+id/showSearchResults"
+        app:destination="@id/searchResultFragment" />
 </navigation>

build.gradle.kts

@@ -9,6 +9,7 @@ buildscript {
         classpath(libs.gradle)
         classpath(libs.kotlin.gradle.plugin)
         classpath(libs.kotlin.serialization)
+        classpath(libs.androidx.navigation.safeargs)
 
         // NOTE: Do not place your application dependencies here, they belong
         // in the individual module build.gradle.kts files

gradle/libs.versions.toml

@@ -38,6 +38,7 @@ kotlin-serialization = { module = "org.jetbrains.kotlin:kotlin-serialization", v
 material = { group = "com.google.android.material", name = "material", version.ref = "material" }
 androidx-navigation-fragment = { group = "androidx.navigation", name = "navigation-fragment-ktx", version.ref = "navigation" }
 androidx-navigation-ui = { group = "androidx.navigation", name = "navigation-ui-ktx", version.ref = "navigation" }
+androidx-navigation-safeargs = { group = "androidx.navigation", name = "navigation-safe-args-gradle-plugin", version.ref = "navigation" }
 androidx-legacySupport = { group = "androidx.legacy", name = "legacy-support-v4", version.ref = "legacySupport" }
 androidx-preference = { group = "androidx.preference", name = "preference-ktx", version.ref = "preference" }
 androidx-test-junit = { group = "androidx.test.ext", name = "junit", version.ref = "extJunit" }