Issue mozilla-mobile#10611 - Add a new SelectOrAddUseCase for reopeni…

…ng existing tab with matching HistoryMetadataKey

components/feature/tabs/src/main/java/mozilla/components/feature/tabs/TabsUseCases.kt

@@ -22,6 +22,7 @@ import mozilla.components.browser.state.state.recover.toTabSessionStates
 import mozilla.components.browser.state.store.BrowserStore
 import mozilla.components.concept.engine.EngineSession
 import mozilla.components.concept.engine.EngineSession.LoadUrlFlags
+import mozilla.components.concept.storage.HistoryMetadataKey
 import mozilla.components.feature.session.SessionUseCases.LoadUrlUseCase
 
 /**
@@ -369,18 +370,48 @@ class TabsUseCases(
     class SelectOrAddUseCase(
         private val store: BrowserStore
     ) {
+        /**
+         * Selects an already existing tab with the matching [HistoryMetadataKey] or otherwise
+         * creates a new tab with the given [url].
+         *
+         * @param url The URL to be selected or loaded in the new tab.
+         * @param historyMetadata The [HistoryMetadataKey] to match for existing tabs.
+         * @return The ID of the selected or created tab.
+         */
+        operator fun invoke(
+            url: String,
+            historyMetadata: HistoryMetadataKey
+        ): String {
+            val tab = store.state.tabs.find { it.historyMetadata == historyMetadata }
+
+            return if (tab != null) {
+                store.dispatch(TabListAction.SelectTabAction(tab.id))
+                tab.id
+            } else {
+                this.invoke(url)
+            }
+        }
+
         /**
          * Selects an already existing tab displaying [url] or otherwise creates a new tab.
+         *
+         * @param url The URL to be loaded in the new tab.
+         * @param private Whether or not this session should use private mode.
+         * @param source The origin of a session to describe how and why it was created.
+         * @param flags The [LoadUrlFlags] to use when loading the provided URL.
+         * @return The ID of the selected or created tab.
          */
         operator fun invoke(
             url: String,
             private: Boolean = false,
             source: Source = Source.NEW_TAB,
             flags: LoadUrlFlags = LoadUrlFlags.none()
-        ) {
+        ): String {
             val existingTab = store.state.findTabByUrl(url)
-            if (existingTab != null) {
+
+            return if (existingTab != null) {
                 store.dispatch(TabListAction.SelectTabAction(existingTab.id))
+                existingTab.id
             } else {
                 val tab = createTab(
                     url = url,
@@ -394,6 +425,7 @@ class TabsUseCases(
                     url,
                     flags
                 ))
+                tab.id
             }
         }
     }

components/feature/tabs/src/test/java/mozilla/components/feature/tabs/TabsUseCasesTest.kt

@@ -21,6 +21,7 @@ import mozilla.components.concept.engine.Engine
 import mozilla.components.concept.engine.EngineSession
 import mozilla.components.concept.engine.EngineSession.LoadUrlFlags
 import mozilla.components.concept.engine.EngineSessionState
+import mozilla.components.concept.storage.HistoryMetadataKey
 import mozilla.components.support.test.any
 import mozilla.components.support.test.argumentCaptor
 import mozilla.components.support.test.ext.joinBlocking
@@ -362,6 +363,31 @@ class TabsUseCasesTest {
         assertEquals(tab, store.state.selectedTab)
     }
 
+    @Test
+    fun `selectOrAddTab selects already existing tab with matching historyMetadata`() {
+        val historyMetadata = HistoryMetadataKey(
+            url = "https://mozilla.org",
+            referrerUrl = "https://firefox.com"
+        )
+
+        val tab = createTab("https://mozilla.org", historyMetadata = historyMetadata)
+        val otherTab = createTab("https://firefox.com")
+
+        store.dispatch(TabListAction.AddTabAction(otherTab)).joinBlocking()
+        store.dispatch(TabListAction.AddTabAction(tab)).joinBlocking()
+
+        assertEquals(otherTab.id, store.state.selectedTabId)
+        assertEquals(otherTab, store.state.selectedTab)
+        assertEquals(2, store.state.tabs.size)
+
+        tabsUseCases.selectOrAddTab(tab.content.url, historyMetadata = historyMetadata)
+        store.waitUntilIdle()
+
+        assertEquals(2, store.state.tabs.size)
+        assertEquals(tab.id, store.state.selectedTabId)
+        assertEquals(tab, store.state.selectedTab)
+    }
+
     @Test
     fun `selectOrAddTab adds new tab if no matching existing tab could be found`() {
         val tab = createTab("https://mozilla.org")
@@ -376,6 +402,27 @@ class TabsUseCasesTest {
         assertNotNull(store.state.findTabByUrl("https://firefox.com"))
     }
 
+    @Test
+    fun `selectOrAddTab adds new tab if no matching existing history metadata could be found`() {
+        val tab = createTab("https://mozilla.org")
+        val historyMetadata = HistoryMetadataKey(
+            url = "https://mozilla.org",
+            referrerUrl = "https://firefox.com"
+        )
+
+        store.dispatch(TabListAction.AddTabAction(tab)).joinBlocking()
+
+        assertEquals(tab.id, store.state.selectedTabId)
+        assertEquals(tab, store.state.selectedTab)
+        assertEquals(1, store.state.tabs.size)
+
+        tabsUseCases.selectOrAddTab("https://firefox.com", historyMetadata = historyMetadata)
+        store.waitUntilIdle()
+
+        assertEquals(2, store.state.tabs.size)
+        assertNotNull(store.state.findTabByUrl("https://firefox.com"))
+    }
+
     @Test
     fun `duplicateTab creates a duplicate of the given tab`() {
         store.dispatch(TabListAction.AddTabAction(

docs/changelog.md

@@ -17,6 +17,7 @@ permalink: /changelog/
 
 * **feature-tabs**
   * Adds `lastAccess` to the `Tab` data class that is used in `TabsTray`.
+  * Adds a new SelectOrAddUseCase for reopening existing tab with matching HistoryMetadataKey. [#10611](https://github.com/mozilla-mobile/android-components/issues/10611)
 
 # 91.0.0
 * [Commits](https://github.com/mozilla-mobile/android-components/compare/v91.0.0...master)