Switch to tab from Input Screen (#6355)

Task/Issue URL:
https://app.asana.com/1/137249556945/project/488551667048375/task/1210706812806825?focus=true

### Description

- Switches to tab when an autocomplete tab item is clicked.

### Steps to test this PR

- [ ] Open different tabs in the browser
- [ ] Type the query/address of the other tab
- [ ] Tap the switch to tab autocomplete item
- [ ] Verify that the tab is switched

Author: joshliebe

app/src/main/java/com/duckduckgo/app/browser/BrowserTabFragment.kt

@@ -19,6 +19,7 @@ package com.duckduckgo.app.browser
 import android.Manifest
 import android.animation.LayoutTransition
 import android.annotation.SuppressLint
+import android.app.Activity.RESULT_CANCELED
 import android.app.Activity.RESULT_OK
 import android.app.PendingIntent
 import android.content.ActivityNotFoundException
@@ -286,6 +287,7 @@ import com.duckduckgo.downloads.api.FileDownloader
 import com.duckduckgo.downloads.api.FileDownloader.PendingFileDownload
 import com.duckduckgo.duckchat.api.DuckChat
 import com.duckduckgo.duckchat.impl.inputscreen.ui.InputScreenActivity.Companion.QUERY
+import com.duckduckgo.duckchat.impl.inputscreen.ui.InputScreenActivity.Companion.TAB_ID
 import com.duckduckgo.duckchat.impl.inputscreen.ui.InputScreenActivityParams
 import com.duckduckgo.duckplayer.api.DuckPlayer
 import com.duckduckgo.duckplayer.api.DuckPlayerSettingsNoParams
@@ -870,11 +872,21 @@ class BrowserTabFragment :
 
     private val searchInterstitialLauncher =
         registerForActivityResult(StartActivityForResult()) { result ->
-            val query = result.data?.getStringExtra(QUERY) ?: return@registerForActivityResult
-            if (result.resultCode == RESULT_OK) {
-                submitQuery(query)
-            } else {
-                omnibar.setDraftTextIfNtp(query)
+            val data = result.data ?: return@registerForActivityResult
+
+            when (result.resultCode) {
+                RESULT_OK -> {
+                    data.getStringExtra(QUERY)?.let { query ->
+                        submitQuery(query)
+                    } ?: data.getStringExtra(TAB_ID)?.let { tabId ->
+                        browserActivity?.openExistingTab(tabId)
+                    }
+                }
+                RESULT_CANCELED -> {
+                    data.getStringExtra(QUERY)?.let { query ->
+                        omnibar.setDraftTextIfNtp(query)
+                    }
+                }
             }
         }
 

duckchat/duckchat-impl/src/main/java/com/duckduckgo/duckchat/impl/inputscreen/ui/InputScreenActivity.kt

@@ -52,6 +52,8 @@ class InputScreenActivity : DuckDuckGoActivity() {
     companion object {
         // TODO: This is in an :impl module and accessed directly from :app module, it should be moved to an API
         const val QUERY = "query"
+        const val TAB_ID = "tab_id"
+
         const val TRANSITION_DURATION = 300L
         const val TRANSITION_INTERPOLATOR_TENSION = 1F
     }

duckchat/duckchat-impl/src/main/java/com/duckduckgo/duckchat/impl/inputscreen/ui/InputScreenFragment.kt

@@ -41,6 +41,7 @@ import com.duckduckgo.duckchat.impl.inputscreen.ui.command.Command
 import com.duckduckgo.duckchat.impl.inputscreen.ui.command.Command.EditWithSelectedQuery
 import com.duckduckgo.duckchat.impl.inputscreen.ui.command.Command.SwitchModeToChat
 import com.duckduckgo.duckchat.impl.inputscreen.ui.command.Command.SwitchModeToSearch
+import com.duckduckgo.duckchat.impl.inputscreen.ui.command.Command.SwitchToTab
 import com.duckduckgo.duckchat.impl.inputscreen.ui.command.Command.UserSubmittedQuery
 import com.duckduckgo.duckchat.impl.inputscreen.ui.tabs.InputScreenPagerAdapter
 import com.duckduckgo.duckchat.impl.inputscreen.ui.viewmodel.InputScreenViewModel
@@ -132,6 +133,11 @@ class InputScreenFragment : DuckDuckGoFragment(R.layout.fragment_input_screen) {
         when (command) {
             is UserSubmittedQuery -> binding.inputModeWidget.submitMessage(command.query)
             is EditWithSelectedQuery -> binding.inputModeWidget.text = command.query
+            is SwitchToTab -> {
+                val data = Intent().putExtra(InputScreenActivity.TAB_ID, command.tabId)
+                requireActivity().setResult(Activity.RESULT_OK, data)
+                exitInterstitial()
+            }
             SwitchModeToSearch -> {
                 binding.viewPager.setCurrentItem(0, false)
             }

duckchat/duckchat-impl/src/main/java/com/duckduckgo/duckchat/impl/inputscreen/ui/viewmodel/InputScreenViewModel.kt

@@ -208,7 +208,6 @@ class InputScreenViewModel @Inject constructor(
     }
 
     private fun onUserSwitchedToTab(tabId: String) {
-        // TODO: handle switch to tab
         command.value = SwitchToTab(tabId)
     }