improve search

app/build.gradle

@@ -3,6 +3,7 @@ import java.time.Instant
 plugins {
     id 'com.android.application'
     id 'kotlin-android'
+    id 'kotlin-android-extensions'
 }
 
 android {
@@ -101,6 +102,10 @@ dependencies {
     implementation libs.cronet.embedded
     implementation libs.cronet.okhttp
     implementation libs.coil
+
+    implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:2.5.1"
+    implementation "androidx.lifecycle:lifecycle-livedata-ktx:2.5.1"
+    implementation "androidx.lifecycle:lifecycle-runtime-ktx:2.5.1"
 }
 
 static def getUnixTime() {

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

@@ -21,6 +21,7 @@ import androidx.appcompat.widget.SearchView
 import androidx.constraintlayout.motion.widget.MotionLayout
 import androidx.constraintlayout.widget.ConstraintLayout
 import androidx.core.os.bundleOf
+import androidx.lifecycle.ViewModelProvider
 import androidx.navigation.NavController
 import androidx.navigation.findNavController
 import androidx.navigation.ui.setupWithNavController
@@ -30,6 +31,7 @@ import com.github.libretube.R
 import com.github.libretube.databinding.ActivityMainBinding
 import com.github.libretube.dialogs.ErrorDialog
 import com.github.libretube.fragments.PlayerFragment
+import com.github.libretube.models.SearchViewModel
 import com.github.libretube.preferences.PreferenceHelper
 import com.github.libretube.preferences.PreferenceKeys
 import com.github.libretube.services.ClosingService
@@ -176,6 +178,14 @@ class MainActivity : AppCompatActivity() {
         searchView = searchItem.actionView as SearchView
         searchView.setMaxWidth(Integer.MAX_VALUE)
 
+        val searchViewModel = ViewModelProvider(this).get(SearchViewModel::class.java)
+
+        searchView.setOnSearchClickListener {
+            if (navController.currentDestination?.id != R.id.searchResultFragment) {
+                navController.navigate(R.id.searchFragment)
+            }
+        }
+
         searchView.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
             override fun onQueryTextSubmit(query: String?): Boolean {
                 val bundle = Bundle()
@@ -185,9 +195,13 @@ class MainActivity : AppCompatActivity() {
             }
 
             override fun onQueryTextChange(newText: String?): Boolean {
-                val bundle = Bundle()
-                bundle.putString("query", newText)
-                navController.navigate(R.id.searchFragment, bundle)
+                if (navController.currentDestination?.id != R.id.searchFragment) {
+                    val bundle = Bundle()
+                    bundle.putString("query", newText)
+                    navController.navigate(R.id.searchFragment, bundle)
+                } else {
+                    searchViewModel.setQuery(newText)
+                }
                 return true
             }
         })
@@ -206,10 +220,6 @@ class MainActivity : AppCompatActivity() {
         // automatically handle clicks on the Home/Up button, so long
         // as you specify a parent activity in AndroidManifest.xml.
         return when (item.itemId) {
-            R.id.action_search -> {
-                navController.navigate(R.id.searchFragment)
-                true
-            }
             R.id.action_settings -> {
                 val settingsIntent = Intent(this, SettingsActivity::class.java)
                 startActivity(settingsIntent)
@@ -357,6 +367,7 @@ class MainActivity : AppCompatActivity() {
     override fun onBackPressed() {
         // remove focus from search
         removeSearchFocus()
+        navController.popBackStack(R.id.searchFragment, false)
 
         if (binding.mainMotionLayout.progress == 0F) {
             try {

app/src/main/java/com/github/libretube/fragments/SearchFragment.kt

@@ -6,14 +6,14 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import androidx.fragment.app.Fragment
+import androidx.fragment.app.activityViewModels
 import androidx.lifecycle.lifecycleScope
-import androidx.navigation.fragment.findNavController
 import androidx.recyclerview.widget.LinearLayoutManager
-import com.github.libretube.R
 import com.github.libretube.activities.MainActivity
 import com.github.libretube.adapters.SearchHistoryAdapter
 import com.github.libretube.adapters.SearchSuggestionsAdapter
 import com.github.libretube.databinding.FragmentSearchBinding
+import com.github.libretube.models.SearchViewModel
 import com.github.libretube.preferences.PreferenceHelper
 import com.github.libretube.util.RetrofitInstance
 import retrofit2.HttpException
@@ -22,6 +22,7 @@ import java.io.IOException
 class SearchFragment() : Fragment() {
     private val TAG = "SearchFragment"
     private lateinit var binding: FragmentSearchBinding
+    private val viewModel: SearchViewModel by activityViewModels()
 
     private var query: String? = null
 
@@ -43,9 +44,19 @@ class SearchFragment() : Fragment() {
         super.onViewCreated(view, savedInstanceState)
 
         binding.suggestionsRecycler.layoutManager = LinearLayoutManager(requireContext())
+
+        // waiting for the query to change
+        viewModel.searchQuery.observe(viewLifecycleOwner) {
+            showData(it)
+        }
+    }
+
+    private fun showData(query: String?) {
         // fetch the search or history
+        binding.historyEmpty.visibility = View.GONE
+        binding.suggestionsRecycler.visibility = View.VISIBLE
         if (query == null || query == "") showHistory()
-        else fetchSuggestions(query!!)
+        else fetchSuggestions(query)
     }
 
     private fun fetchSuggestions(query: String) {
@@ -68,7 +79,9 @@ class SearchFragment() : Fragment() {
                         (activity as MainActivity).searchView
                     )
                 runOnUiThread {
-                    binding.suggestionsRecycler.adapter = suggestionsAdapter
+                    if (viewModel.searchQuery.value != "") {
+                        binding.suggestionsRecycler.adapter = suggestionsAdapter
+                    }
                 }
             }
         }
@@ -94,10 +107,4 @@ class SearchFragment() : Fragment() {
         if (!isAdded) return // Fragment not attached to an Activity
         activity?.runOnUiThread(action)
     }
-
-    override fun onDestroy() {
-        // remove the backstack entries
-        findNavController().popBackStack(R.id.searchFragment, true)
-        super.onDestroy()
-    }
 }

app/src/main/java/com/github/libretube/models/SearchViewModel.kt

@@ -0,0 +1,12 @@
+package com.github.libretube.models
+
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+
+class SearchViewModel : ViewModel() {
+    var searchQuery = MutableLiveData<String>()
+
+    fun setQuery(query: String?) {
+        this.searchQuery.value = query
+    }
+}

build.gradle

@@ -10,7 +10,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.2.1'
+        classpath 'com.android.tools.build:gradle:7.2.2'
         classpath 'org.jetbrains.kotlin:kotlin-gradle-plugin:1.7.10'
 
         // NOTE: Do not place your application dependencies here; they belong