From f5ac01de093b1143a5fd44d2c2d5178c667f31e8 Mon Sep 17 00:00:00 2001
From: Wally Hackenslacker <mastor89@protonmail.com>
Date: Mon, 16 Mar 2026 01:33:48 -0400
Subject: [PATCH] feat: route board and card taps to detail screens

---
 .../kanbn4droid/app/BoardDetailFlowTest.kt    | 47 +++++++++++++++++++
 .../kanbn4droid/app/BoardsFlowTest.kt         | 12 ++---
 app/src/main/AndroidManifest.xml              |  2 +-
 .../app/BoardDetailPlaceholderActivity.kt     | 24 ----------
 .../kanbn4droid/app/BoardsActivity.kt         |  7 +--
 .../app/CardDetailPlaceholderActivity.kt      | 24 ++++++++++
 .../app/boarddetail/BoardDetailActivity.kt    | 18 ++++++-
 .../activity_card_detail_placeholder.xml      | 30 ++++++++++++
 8 files changed, 129 insertions(+), 35 deletions(-)
 delete mode 100644 app/src/main/java/space/hackenslacker/kanbn4droid/app/BoardDetailPlaceholderActivity.kt
 create mode 100644 app/src/main/java/space/hackenslacker/kanbn4droid/app/CardDetailPlaceholderActivity.kt
 create mode 100644 app/src/main/res/layout/activity_card_detail_placeholder.xml

diff --git a/app/src/androidTest/java/space/hackenslacker/kanbn4droid/app/BoardDetailFlowTest.kt b/app/src/androidTest/java/space/hackenslacker/kanbn4droid/app/BoardDetailFlowTest.kt
index ef032bb..f73ad9b 100644
--- a/app/src/androidTest/java/space/hackenslacker/kanbn4droid/app/BoardDetailFlowTest.kt
+++ b/app/src/androidTest/java/space/hackenslacker/kanbn4droid/app/BoardDetailFlowTest.kt
@@ -11,6 +11,9 @@ import androidx.test.espresso.action.ViewActions.click
 import androidx.test.espresso.action.ViewActions.longClick
 import androidx.test.espresso.action.ViewActions.replaceText
 import androidx.test.espresso.assertion.ViewAssertions.matches
+import androidx.test.espresso.intent.Intents
+import androidx.test.espresso.intent.matcher.IntentMatchers.hasComponent
+import androidx.test.espresso.intent.matcher.IntentMatchers.hasExtra
 import androidx.test.espresso.matcher.RootMatchers.isDialog
 import androidx.test.espresso.matcher.ViewMatchers.withContentDescription
 import androidx.test.espresso.matcher.ViewMatchers.isDisplayed
@@ -53,12 +56,14 @@ class BoardDetailFlowTest {
     @Before
     fun setUp() {
         originalLocale = Locale.getDefault()
+        Intents.init()
         defaultDataSource = FakeBoardDetailDataSource(initialDetail = detailOneList())
         BoardDetailActivity.testDataSourceFactory = { defaultDataSource }
     }
 
     @After
     fun tearDown() {
+        Intents.release()
         BoardDetailActivity.testDataSourceFactory = null
         originalLocale?.let { Locale.setDefault(it) }
     }
@@ -245,6 +250,29 @@ class BoardDetailFlowTest {
         }
     }
 
+    @Test
+    fun cardTapNavigatesToCardPlaceholderWithExtras() {
+        launchBoardDetail()
+
+        onView(withText("Card 1")).perform(click())
+
+        Intents.intended(hasComponent(CardDetailPlaceholderActivity::class.java.name))
+        Intents.intended(hasExtra(CardDetailPlaceholderActivity.EXTRA_CARD_ID, "card-1"))
+        Intents.intended(hasExtra(CardDetailPlaceholderActivity.EXTRA_CARD_TITLE, "Card 1"))
+    }
+
+    @Test
+    fun cardTapBlankTitle_usesCardFallbackInPlaceholderExtra() {
+        defaultDataSource.currentDetail = detailWithCardTitle("   ")
+        launchBoardDetail()
+
+        onView(withId(R.id.cardItemRoot)).perform(click())
+
+        Intents.intended(hasComponent(CardDetailPlaceholderActivity::class.java.name))
+        Intents.intended(hasExtra(CardDetailPlaceholderActivity.EXTRA_CARD_ID, "card-1"))
+        Intents.intended(hasExtra(CardDetailPlaceholderActivity.EXTRA_CARD_TITLE, "Card"))
+    }
+
     private fun launchBoardDetail(): ActivityScenario<BoardDetailActivity> {
         val intent = Intent(
             androidx.test.core.app.ApplicationProvider.getApplicationContext(),
@@ -353,5 +381,24 @@ class BoardDetailFlowTest {
                 ),
             )
         }
+
+        fun detailWithCardTitle(title: String): BoardDetail {
+            return detailOneList().copy(
+                lists = listOf(
+                    BoardListDetail(
+                        id = "list-1",
+                        title = "To Do",
+                        cards = listOf(
+                            BoardCardSummary(
+                                id = "card-1",
+                                title = title,
+                                tags = emptyList(),
+                                dueAtEpochMillis = null,
+                            ),
+                        ),
+                    ),
+                ),
+            )
+        }
     }
 }
diff --git a/app/src/androidTest/java/space/hackenslacker/kanbn4droid/app/BoardsFlowTest.kt b/app/src/androidTest/java/space/hackenslacker/kanbn4droid/app/BoardsFlowTest.kt
index fbd6c8e..603ee70 100644
--- a/app/src/androidTest/java/space/hackenslacker/kanbn4droid/app/BoardsFlowTest.kt
+++ b/app/src/androidTest/java/space/hackenslacker/kanbn4droid/app/BoardsFlowTest.kt
@@ -46,7 +46,7 @@ class BoardsFlowTest {
     }
 
     @Test
-    fun boardTapNavigatesToDetailPlaceholderWithExtras() {
+    fun boardTapNavigatesToBoardDetailActivity() {
         MainActivity.dependencies.apiClientFactory = {
             FakeBoardsApiClient(
                 boards = mutableListOf(BoardSummary("1", "Alpha")),
@@ -58,9 +58,9 @@ class BoardsFlowTest {
 
         onView(withText("Alpha")).perform(click())
 
-        Intents.intended(hasComponent(BoardDetailPlaceholderActivity::class.java.name))
-        Intents.intended(hasExtra(BoardDetailPlaceholderActivity.EXTRA_BOARD_ID, "1"))
-        Intents.intended(hasExtra(BoardDetailPlaceholderActivity.EXTRA_BOARD_TITLE, "Alpha"))
+        Intents.intended(hasComponent(space.hackenslacker.kanbn4droid.app.boarddetail.BoardDetailActivity::class.java.name))
+        Intents.intended(hasExtra(space.hackenslacker.kanbn4droid.app.boarddetail.BoardDetailActivity.EXTRA_BOARD_ID, "1"))
+        Intents.intended(hasExtra(space.hackenslacker.kanbn4droid.app.boarddetail.BoardDetailActivity.EXTRA_BOARD_TITLE, "Alpha"))
     }
 
     @Test
@@ -79,8 +79,8 @@ class BoardsFlowTest {
         onView(withId(R.id.useTemplateChip)).perform(click())
         onView(withId(android.R.id.button1)).inRoot(isDialog()).perform(click())
 
-        Intents.intended(hasComponent(BoardDetailPlaceholderActivity::class.java.name))
-        Intents.intended(hasExtra(BoardDetailPlaceholderActivity.EXTRA_BOARD_TITLE, "Roadmap"))
+        Intents.intended(hasComponent(space.hackenslacker.kanbn4droid.app.boarddetail.BoardDetailActivity::class.java.name))
+        Intents.intended(hasExtra(space.hackenslacker.kanbn4droid.app.boarddetail.BoardDetailActivity.EXTRA_BOARD_TITLE, "Roadmap"))
     }
 
     @Test
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 14acd5f..69dfb94 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -12,7 +12,7 @@
         android:usesCleartextTraffic="true"
         android:theme="@style/Theme.Kanbn4Droid">
         <activity
-            android:name=".BoardDetailPlaceholderActivity"
+            android:name=".CardDetailPlaceholderActivity"
             android:exported="false" />
         <activity
             android:name=".boarddetail.BoardDetailActivity"
diff --git a/app/src/main/java/space/hackenslacker/kanbn4droid/app/BoardDetailPlaceholderActivity.kt b/app/src/main/java/space/hackenslacker/kanbn4droid/app/BoardDetailPlaceholderActivity.kt
deleted file mode 100644
index bee20ce..0000000
--- a/app/src/main/java/space/hackenslacker/kanbn4droid/app/BoardDetailPlaceholderActivity.kt
+++ /dev/null
@@ -1,24 +0,0 @@
-package space.hackenslacker.kanbn4droid.app
-
-import android.os.Bundle
-import android.widget.TextView
-import androidx.appcompat.app.AppCompatActivity
-
-class BoardDetailPlaceholderActivity : AppCompatActivity() {
-
-    override fun onCreate(savedInstanceState: Bundle?) {
-        super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_board_detail_placeholder)
-
-        val boardTitle = intent.getStringExtra(EXTRA_BOARD_TITLE).orEmpty()
-        val boardId = intent.getStringExtra(EXTRA_BOARD_ID).orEmpty()
-
-        val titleView: TextView = findViewById(R.id.boardDetailPlaceholderTitle)
-        titleView.text = getString(R.string.board_detail_placeholder_title, boardTitle, boardId)
-    }
-
-    companion object {
-        const val EXTRA_BOARD_ID = "extra_board_id"
-        const val EXTRA_BOARD_TITLE = "extra_board_title"
-    }
-}
diff --git a/app/src/main/java/space/hackenslacker/kanbn4droid/app/BoardsActivity.kt b/app/src/main/java/space/hackenslacker/kanbn4droid/app/BoardsActivity.kt
index b96d73b..5db4337 100644
--- a/app/src/main/java/space/hackenslacker/kanbn4droid/app/BoardsActivity.kt
+++ b/app/src/main/java/space/hackenslacker/kanbn4droid/app/BoardsActivity.kt
@@ -35,6 +35,7 @@ import space.hackenslacker.kanbn4droid.app.boards.BoardsRepository
 import space.hackenslacker.kanbn4droid.app.boards.BoardsUiEvent
 import space.hackenslacker.kanbn4droid.app.boards.BoardsUiState
 import space.hackenslacker.kanbn4droid.app.boards.BoardsViewModel
+import space.hackenslacker.kanbn4droid.app.boarddetail.BoardDetailActivity
 
 class BoardsActivity : AppCompatActivity() {
     private lateinit var sessionStore: SessionStore
@@ -245,9 +246,9 @@ class BoardsActivity : AppCompatActivity() {
 
     private fun navigateToBoard(board: BoardSummary) {
         startActivity(
-            Intent(this, BoardDetailPlaceholderActivity::class.java)
-                .putExtra(BoardDetailPlaceholderActivity.EXTRA_BOARD_ID, board.id)
-                .putExtra(BoardDetailPlaceholderActivity.EXTRA_BOARD_TITLE, board.title),
+            Intent(this, BoardDetailActivity::class.java)
+                .putExtra(BoardDetailActivity.EXTRA_BOARD_ID, board.id)
+                .putExtra(BoardDetailActivity.EXTRA_BOARD_TITLE, board.title),
         )
     }
 
diff --git a/app/src/main/java/space/hackenslacker/kanbn4droid/app/CardDetailPlaceholderActivity.kt b/app/src/main/java/space/hackenslacker/kanbn4droid/app/CardDetailPlaceholderActivity.kt
new file mode 100644
index 0000000..ba4db7b
--- /dev/null
+++ b/app/src/main/java/space/hackenslacker/kanbn4droid/app/CardDetailPlaceholderActivity.kt
@@ -0,0 +1,24 @@
+package space.hackenslacker.kanbn4droid.app
+
+import android.os.Bundle
+import android.widget.TextView
+import androidx.appcompat.app.AppCompatActivity
+
+class CardDetailPlaceholderActivity : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_card_detail_placeholder)
+
+        val cardId = intent.getStringExtra(EXTRA_CARD_ID).orEmpty()
+        val cardTitle = intent.getStringExtra(EXTRA_CARD_TITLE).orEmpty()
+
+        val titleView: TextView = findViewById(R.id.cardDetailPlaceholderTitle)
+        titleView.text = "$cardTitle\n(id: $cardId)"
+    }
+
+    companion object {
+        const val EXTRA_CARD_ID = "extra_card_id"
+        const val EXTRA_CARD_TITLE = "extra_card_title"
+    }
+}
diff --git a/app/src/main/java/space/hackenslacker/kanbn4droid/app/boarddetail/BoardDetailActivity.kt b/app/src/main/java/space/hackenslacker/kanbn4droid/app/boarddetail/BoardDetailActivity.kt
index 452e6a9..d9ed9ab 100644
--- a/app/src/main/java/space/hackenslacker/kanbn4droid/app/boarddetail/BoardDetailActivity.kt
+++ b/app/src/main/java/space/hackenslacker/kanbn4droid/app/boarddetail/BoardDetailActivity.kt
@@ -1,5 +1,6 @@
 package space.hackenslacker.kanbn4droid.app.boarddetail
 
+import android.content.Intent
 import android.os.Bundle
 import android.view.Menu
 import android.view.MenuItem
@@ -17,6 +18,7 @@ import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import com.google.android.material.snackbar.Snackbar
 import kotlinx.coroutines.launch
 import space.hackenslacker.kanbn4droid.app.MainActivity
+import space.hackenslacker.kanbn4droid.app.CardDetailPlaceholderActivity
 import space.hackenslacker.kanbn4droid.app.R
 import space.hackenslacker.kanbn4droid.app.auth.ApiKeyStore
 import space.hackenslacker.kanbn4droid.app.auth.HttpKanbnApiClient
@@ -157,7 +159,21 @@ class BoardDetailActivity : AppCompatActivity() {
             viewModel.events.collect { event ->
                 when (event) {
                     is BoardDetailUiEvent.NavigateToCardPlaceholder -> {
-                        Snackbar.make(pager, getString(R.string.board_detail_card_detail_coming_soon), Snackbar.LENGTH_SHORT).show()
+                        val cardTitle = viewModel.uiState.value.boardDetail
+                            ?.lists
+                            .orEmpty()
+                            .asSequence()
+                            .flatMap { list -> list.cards.asSequence() }
+                            .firstOrNull { card -> card.id == event.cardId }
+                            ?.title
+                            .orEmpty()
+                            .trim()
+                            .ifBlank { "Card" }
+                        startActivity(
+                            Intent(this@BoardDetailActivity, CardDetailPlaceholderActivity::class.java)
+                                .putExtra(CardDetailPlaceholderActivity.EXTRA_CARD_ID, event.cardId)
+                                .putExtra(CardDetailPlaceholderActivity.EXTRA_CARD_TITLE, cardTitle),
+                        )
                     }
 
                     is BoardDetailUiEvent.ShowServerError -> {
diff --git a/app/src/main/res/layout/activity_card_detail_placeholder.xml b/app/src/main/res/layout/activity_card_detail_placeholder.xml
new file mode 100644
index 0000000..7189ea4
--- /dev/null
+++ b/app/src/main/res/layout/activity_card_detail_placeholder.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:padding="24dp">
+
+    <TextView
+        android:id="@+id/cardDetailPlaceholderTitle"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:gravity="center"
+        android:textAppearance="@style/TextAppearance.MaterialComponents.Headline5"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <TextView
+        android:id="@+id/cardDetailPlaceholderSubtitle"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:gravity="center"
+        android:text="@string/board_detail_card_detail_coming_soon"
+        android:textAppearance="@style/TextAppearance.MaterialComponents.Body1"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/cardDetailPlaceholderTitle" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>