For #3722: Invoke search on long press home button

Co-authored-by: s-ankur <s.ankursonawane@gmail.com>

app/src/main/java/org/mozilla/fenix/HomeActivity.kt

@@ -90,6 +90,7 @@ import org.mozilla.fenix.ext.nav
 import org.mozilla.fenix.ext.setNavigationIcon
 import org.mozilla.fenix.ext.settings
 import org.mozilla.fenix.home.HomeFragmentDirections
+import org.mozilla.fenix.home.intent.AssistIntentProcessor
 import org.mozilla.fenix.home.intent.CrashReporterIntentProcessor
 import org.mozilla.fenix.home.intent.DefaultBrowserIntentProcessor
 import org.mozilla.fenix.home.intent.HomeDeepLinkIntentProcessor
@@ -182,6 +183,7 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
         listOf(
             HomeDeepLinkIntentProcessor(this),
             SpeechProcessingIntentProcessor(this, components.core.store),
+            AssistIntentProcessor(),
             StartSearchIntentProcessor(),
             OpenBrowserIntentProcessor(this, ::getIntentSessionId),
             OpenSpecificTabIntentProcessor(this),

app/src/main/java/org/mozilla/fenix/home/intent/AssistIntentProcessor.kt

@@ -0,0 +1,40 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.mozilla.fenix.home.intent
+
+import android.content.Intent
+import androidx.navigation.NavController
+import androidx.navigation.navOptions
+import org.mozilla.fenix.NavGraphDirections
+import org.mozilla.fenix.R
+import org.mozilla.fenix.components.metrics.MetricsUtils
+import org.mozilla.fenix.ext.nav
+
+/**
+ * Long pressing home button should also open to the search fragment if Fenix is set as the
+ * assist app
+ */
+class AssistIntentProcessor : HomeIntentProcessor {
+    override fun process(intent: Intent, navController: NavController, out: Intent): Boolean {
+        if (intent.action != Intent.ACTION_ASSIST) {
+            return false
+        }
+
+        val directions = NavGraphDirections.actionGlobalSearchDialog(
+            sessionId = null,
+            // Will follow this up with adding `ASSIST` as a search source.
+            // https://bugzilla.mozilla.org/show_bug.cgi?id=1808043
+            searchAccessPoint = MetricsUtils.Source.NONE,
+        )
+
+        val options = navOptions {
+            popUpTo(R.id.homeFragment)
+        }
+
+        navController.nav(null, directions, options)
+
+        return true
+    }
+}

app/src/test/java/org/mozilla/fenix/home/intent/AssistIntentProcessorTest.kt

@@ -0,0 +1,67 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.mozilla.fenix.home.intent
+
+import android.content.Intent
+import androidx.navigation.NavController
+import androidx.navigation.navOptions
+import io.mockk.Called
+import io.mockk.mockk
+import io.mockk.verify
+import org.junit.Assert.assertFalse
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mozilla.fenix.NavGraphDirections
+import org.mozilla.fenix.R
+import org.mozilla.fenix.components.metrics.MetricsUtils
+import org.mozilla.fenix.ext.nav
+import org.mozilla.fenix.helpers.FenixRobolectricTestRunner
+
+@RunWith(FenixRobolectricTestRunner::class)
+class AssistIntentProcessorTest {
+    private val navController: NavController = mockk(relaxed = true)
+    private val out: Intent = mockk(relaxed = true)
+
+    @Test
+    fun `GIVEN an intent with wrong action WHEN it is processed THEN nothing should happen`() {
+        val intent = Intent().apply {
+            action = TEST_WRONG_ACTION
+        }
+        val result = StartSearchIntentProcessor().process(intent, navController, out)
+
+        verify { navController wasNot Called }
+        verify { out wasNot Called }
+        assertFalse(result)
+    }
+
+    @Test
+    fun `GIVEN an intent with ACTION_ASSIST action WHEN it is processed THEN navigate to the search dialog`() {
+        val intent = Intent().apply {
+            action = Intent.ACTION_ASSIST
+        }
+
+        AssistIntentProcessor().process(intent, navController, out)
+        val options = navOptions {
+            popUpTo(R.id.homeFragment)
+        }
+
+        verify {
+            navController.nav(
+                null,
+                NavGraphDirections.actionGlobalSearchDialog(
+                    sessionId = null,
+                    searchAccessPoint = MetricsUtils.Source.NONE,
+                ),
+                options,
+            )
+        }
+
+        verify { out wasNot Called }
+    }
+
+    companion object {
+        const val TEST_WRONG_ACTION = "test-action"
+    }
+}