For #7924 - added an undo snackbar when a pinned site is removed

app/src/androidTest/java/org/mozilla/fenix/ui/TopSitesTest.kt

@@ -20,6 +20,7 @@ import org.mozilla.fenix.helpers.RetryTestRule
 import org.mozilla.fenix.helpers.TestAssetHelper.getGenericAsset
 import org.mozilla.fenix.helpers.TestHelper.generateRandomString
 import org.mozilla.fenix.helpers.TestHelper.getStringResource
+import org.mozilla.fenix.helpers.TestHelper.waitUntilSnackbarGone
 import org.mozilla.fenix.ui.robots.browserScreen
 import org.mozilla.fenix.ui.robots.homeScreen
 import org.mozilla.fenix.ui.robots.navigationToolbar
@@ -228,6 +229,8 @@ class TopSitesTest {
             verifyExistingTopSitesTabs(defaultWebPage.title)
         }.openContextMenuOnTopSitesWithTitle(defaultWebPage.title) {
         }.deleteTopSiteFromHistory {
+            verifySnackBarText(getStringResource(R.string.snackbar_top_site_removed))
+            waitUntilSnackbarGone()
         }.openThreeDotMenu {
         }.openHistory {
             verifyEmptyHistoryView()

app/src/main/java/org/mozilla/fenix/home/topsites/TopSiteItemViewHolder.kt

@@ -31,6 +31,7 @@ import org.mozilla.fenix.GleanMetrics.Pings
 import org.mozilla.fenix.GleanMetrics.TopSites
 import org.mozilla.fenix.R
 import org.mozilla.fenix.components.AppStore
+import org.mozilla.fenix.components.FenixSnackbar
 import org.mozilla.fenix.databinding.TopSiteItemBinding
 import org.mozilla.fenix.ext.bitmapForUrl
 import org.mozilla.fenix.ext.components
@@ -67,9 +68,22 @@ class TopSiteItemViewHolder(
                     is TopSiteItemMenu.Item.RenameTopSite -> interactor.onRenameTopSiteClicked(
                         topSite,
                     )
-                    is TopSiteItemMenu.Item.RemoveTopSite -> interactor.onRemoveTopSiteClicked(
-                        topSite,
-                    )
+                    is TopSiteItemMenu.Item.RemoveTopSite -> {
+                        interactor.onRemoveTopSiteClicked(topSite)
+                        FenixSnackbar.make(
+                            view = it,
+                            duration = FenixSnackbar.LENGTH_LONG,
+                            isDisplayedWithBrowserToolbar = false,
+                        )
+                            .setText(it.context.getString(R.string.snackbar_top_site_removed))
+                            .setAction(it.context.getString(R.string.snackbar_deleted_undo)) {
+                                it.context.components.useCases.topSitesUseCase.addPinnedSites(
+                                    topSite.title.toString(),
+                                    topSite.url,
+                                )
+                            }
+                            .show()
+                    }
                     is TopSiteItemMenu.Item.Settings -> interactor.onSettingsClicked()
                     is TopSiteItemMenu.Item.SponsorPrivacy -> interactor.onSponsorPrivacyClicked()
                 }