Fix #1152: LessonThumbnailImageView

app/src/main/java/org/oppia/app/completedstorylist/CompletedStoryItemViewModel.kt

@@ -4,4 +4,7 @@ import androidx.lifecycle.ViewModel
 import org.oppia.app.model.CompletedStory
 
 /** Completed story view model for the recycler view in [CompletedStoryListFragment]. */
-class CompletedStoryItemViewModel(val completedStory: CompletedStory) : ViewModel()
+class CompletedStoryItemViewModel(
+  val completedStory: CompletedStory,
+  val entityType: String
+) : ViewModel()

app/src/main/java/org/oppia/app/completedstorylist/CompletedStoryListViewModel.kt

@@ -9,13 +9,15 @@ import org.oppia.app.model.ProfileId
 import org.oppia.domain.topic.TopicController
 import org.oppia.util.data.AsyncResult
 import org.oppia.util.logging.ConsoleLogger
+import org.oppia.util.parser.StoryHtmlParserEntityType
 import javax.inject.Inject
 
 /** The ViewModel for [CompletedStoryListFragment]. */
 @FragmentScope
 class CompletedStoryListViewModel @Inject constructor(
   private val topicController: TopicController,
-  private val logger: ConsoleLogger
+  private val logger: ConsoleLogger,
+  @StoryHtmlParserEntityType private val entityType: String
 ) : ViewModel() {
   /** [internalProfileId] needs to be set before any of the live data members can be accessed. */
   private var internalProfileId: Int = -1
@@ -57,7 +59,7 @@ class CompletedStoryListViewModel @Inject constructor(
     val itemViewModelList: MutableList<CompletedStoryItemViewModel> = mutableListOf()
     itemViewModelList.addAll(
       completedStoryList.completedStoryList.map { completedStory ->
-        CompletedStoryItemViewModel(completedStory)
+        CompletedStoryItemViewModel(completedStory, entityType)
       }
     )
     return itemViewModelList

app/src/main/java/org/oppia/app/customview/LessonThumbnailImageView.kt

@@ -0,0 +1,142 @@
+package org.oppia.app.customview
+
+import android.content.Context
+import android.util.AttributeSet
+import androidx.appcompat.widget.AppCompatImageView
+import androidx.fragment.app.FragmentManager
+import org.oppia.app.R
+import org.oppia.app.fragment.InjectableFragment
+import org.oppia.app.model.LessonThumbnail
+import org.oppia.app.model.LessonThumbnailGraphic
+import org.oppia.util.gcsresource.DefaultResourceBucketName
+import org.oppia.util.parser.DefaultGcsPrefix
+import org.oppia.util.parser.ImageLoader
+import org.oppia.util.parser.ImageViewTarget
+import org.oppia.util.parser.ThumbnailDownloadUrlTemplate
+import javax.inject.Inject
+
+/** A custom [AppCompatImageView] used to show lesson thumbnails. */
+class LessonThumbnailImageView @JvmOverloads constructor(
+  context: Context,
+  attrs: AttributeSet? = null,
+  defStyleAttr: Int = 0
+) : AppCompatImageView(context, attrs, defStyleAttr) {
+
+  private val imageView = this
+  private lateinit var lessonThumbnail: LessonThumbnail
+  private lateinit var entityId: String
+  private lateinit var entityType: String
+
+  @Inject
+  lateinit var imageLoader: ImageLoader
+
+  @Inject
+  @field:DefaultResourceBucketName
+  lateinit var resourceBucketName: String
+
+  @Inject
+  @field:ThumbnailDownloadUrlTemplate
+  lateinit var thumbnailDownloadUrlTemplate: String
+
+  @Inject
+  @field:DefaultGcsPrefix
+  lateinit var gcsPrefix: String
+
+  fun setEntityId(entityId: String) {
+    this.entityId = entityId
+    checkIfLoadingIsPossible()
+  }
+
+  fun setEntityType(entityType: String) {
+    this.entityType = entityType
+    checkIfLoadingIsPossible()
+  }
+
+  fun setLessonThumbnail(lessonThumbnail: LessonThumbnail) {
+    this.lessonThumbnail = lessonThumbnail
+    checkIfLoadingIsPossible()
+  }
+
+  private fun checkIfLoadingIsPossible() {
+    if (::entityId.isInitialized && ::entityType.isInitialized && ::lessonThumbnail.isInitialized) {
+      loadLessonThumbnail()
+    }
+  }
+
+  private fun loadLessonThumbnail() {
+    if (lessonThumbnail.thumbnailFilename.isNotEmpty()) {
+      loadImage(lessonThumbnail.thumbnailFilename)
+    } else {
+      imageView.setImageResource(getLessonDrawableResource(lessonThumbnail))
+    }
+    imageView.setBackgroundColor(lessonThumbnail.backgroundColorRgb)
+  }
+
+  /** Loads an image using Glide from [filename]. */
+  private fun loadImage(filename: String) {
+    val imageName = String.format(
+      thumbnailDownloadUrlTemplate,
+      entityType,
+      entityId,
+      filename
+    )
+    val imageUrl = "$gcsPrefix/$resourceBucketName/$imageName"
+    if (imageUrl.endsWith("svg", ignoreCase = true)) {
+      imageLoader.loadSvg(imageUrl, ImageViewTarget(this))
+    } else {
+      imageLoader.loadBitmap(imageUrl, ImageViewTarget(this))
+    }
+  }
+
+  override fun onAttachedToWindow() {
+    super.onAttachedToWindow()
+    FragmentManager.findFragment<InjectableFragment>(this)
+      .createViewComponent(this)
+      .inject(this)
+  }
+
+  private fun getLessonDrawableResource(lessonThumbnail: LessonThumbnail): Int {
+    return when (lessonThumbnail.thumbnailGraphic) {
+      LessonThumbnailGraphic.BAKER ->
+        R.drawable.lesson_thumbnail_graphic_baker
+      LessonThumbnailGraphic.CHILD_WITH_BOOK ->
+        R.drawable.lesson_thumbnail_graphic_child_with_book
+      LessonThumbnailGraphic.CHILD_WITH_CUPCAKES ->
+        R.drawable.lesson_thumbnail_graphic_child_with_cupcakes
+      LessonThumbnailGraphic.CHILD_WITH_FRACTIONS_HOMEWORK ->
+        R.drawable.lesson_thumbnail_graphic_child_with_fractions_homework
+      LessonThumbnailGraphic.DUCK_AND_CHICKEN ->
+        R.drawable.lesson_thumbnail_graphic_duck_and_chicken
+      LessonThumbnailGraphic.PERSON_WITH_PIE_CHART ->
+        R.drawable.lesson_thumbnail_graphic_person_with_pie_chart
+      LessonThumbnailGraphic.IDENTIFYING_THE_PARTS_OF_A_FRACTION ->
+        R.drawable.topic_fractions_01
+      LessonThumbnailGraphic.WRITING_FRACTIONS ->
+        R.drawable.topic_fractions_02
+      LessonThumbnailGraphic.EQUIVALENT_FRACTIONS ->
+        R.drawable.topic_fractions_03
+      LessonThumbnailGraphic.MIXED_NUMBERS_AND_IMPROPER_FRACTIONS ->
+        R.drawable.topic_fractions_04
+      LessonThumbnailGraphic.COMPARING_FRACTIONS ->
+        R.drawable.topic_fractions_05
+      LessonThumbnailGraphic.ADDING_AND_SUBTRACTING_FRACTIONS ->
+        R.drawable.topic_fractions_06
+      LessonThumbnailGraphic.MULTIPLYING_FRACTIONS ->
+        R.drawable.topic_fractions_07
+      LessonThumbnailGraphic.DIVIDING_FRACTIONS ->
+        R.drawable.topic_fractions_08
+      LessonThumbnailGraphic.DERIVE_A_RATIO ->
+        R.drawable.topic_ratios_01
+      LessonThumbnailGraphic.WHAT_IS_A_FRACTION ->
+        R.drawable.topic_fractions_01
+      LessonThumbnailGraphic.FRACTION_OF_A_GROUP ->
+        R.drawable.topic_fractions_02
+      LessonThumbnailGraphic.ADDING_FRACTIONS ->
+        R.drawable.topic_fractions_03
+      LessonThumbnailGraphic.MIXED_NUMBERS ->
+        R.drawable.topic_fractions_04
+      else ->
+        R.drawable.topic_fractions_01
+    }
+  }
+}

app/src/main/java/org/oppia/app/home/HomeFragmentPresenter.kt

@@ -31,6 +31,8 @@ import org.oppia.domain.topic.TopicListController
 import org.oppia.util.data.AsyncResult
 import org.oppia.util.datetime.DateTimeUtil
 import org.oppia.util.logging.ConsoleLogger
+import org.oppia.util.parser.StoryHtmlParserEntityType
+import org.oppia.util.parser.TopicHtmlParserEntityType
 import org.oppia.util.system.OppiaClock
 import javax.inject.Inject
 
@@ -43,7 +45,9 @@ class HomeFragmentPresenter @Inject constructor(
   private val topicListController: TopicListController,
   private val oppiaClock: OppiaClock,
   private val logger: ConsoleLogger,
-  private val oppiaLogger: OppiaLogger
+  private val oppiaLogger: OppiaLogger,
+  @TopicHtmlParserEntityType private val topicEntityType: String,
+  @StoryHtmlParserEntityType private val storyEntityType: String
 ) {
   private val routeToTopicListener = activity as RouteToTopicListener
   private val itemList: MutableList<HomeItemViewModel> = ArrayList()
@@ -142,7 +146,11 @@ class HomeFragmentPresenter @Inject constructor(
       Observer<TopicList> { result ->
         for (topicSummary in result.topicSummaryList) {
           val topicSummaryViewModel =
-            TopicSummaryViewModel(topicSummary, fragment as TopicSummaryClickListener)
+            TopicSummaryViewModel(
+              topicSummary,
+              topicEntityType,
+              fragment as TopicSummaryClickListener
+            )
           itemList.add(topicSummaryViewModel)
         }
         topicListAdapter.notifyDataSetChanged()
@@ -181,7 +189,7 @@ class HomeFragmentPresenter @Inject constructor(
       fragment,
       Observer<OngoingStoryList> {
         it.recentStoryList.take(limit).forEach { promotedStory ->
-          val recentStory = PromotedStoryViewModel(activity, internalProfileId)
+          val recentStory = PromotedStoryViewModel(activity, internalProfileId, storyEntityType)
           recentStory.setPromotedStory(promotedStory)
           promotedStoryList.add(recentStory)
         }

app/src/main/java/org/oppia/app/home/recentlyplayed/OngoingStoryViewModel.kt

@@ -9,6 +9,7 @@ import org.oppia.app.model.PromotedStory
 /** [ViewModel] for displaying a promoted story. */
 class OngoingStoryViewModel(
   val ongoingStory: PromotedStory,
+  val entityType: String,
   private val ongoingStoryClickListener: OngoingStoryClickListener
 ) : RecentlyPlayedItemViewModel() {
   fun clickOnOngoingStoryTile(@Suppress("UNUSED_PARAMETER") v: View) {

app/src/main/java/org/oppia/app/home/recentlyplayed/RecentlyPlayedFragmentPresenter.kt

@@ -22,6 +22,7 @@ import org.oppia.domain.exploration.ExplorationDataController
 import org.oppia.domain.topic.TopicListController
 import org.oppia.util.data.AsyncResult
 import org.oppia.util.logging.ConsoleLogger
+import org.oppia.util.parser.StoryHtmlParserEntityType
 import javax.inject.Inject
 
 /** The presenter for [RecentlyPlayedFragment]. */
@@ -31,7 +32,8 @@ class RecentlyPlayedFragmentPresenter @Inject constructor(
   private val fragment: Fragment,
   private val logger: ConsoleLogger,
   private val explorationDataController: ExplorationDataController,
-  private val topicListController: TopicListController
+  private val topicListController: TopicListController,
+  @StoryHtmlParserEntityType private val entityType: String
 ) {
 
   private val routeToExplorationListener = activity as RouteToExplorationListener
@@ -81,7 +83,11 @@ class RecentlyPlayedFragmentPresenter @Inject constructor(
           itemList.add(recentSectionTitleViewModel)
           for (promotedStory in it.recentStoryList) {
             val ongoingStoryViewModel =
-              OngoingStoryViewModel(promotedStory, fragment as OngoingStoryClickListener)
+              OngoingStoryViewModel(
+                promotedStory,
+                entityType,
+                fragment as OngoingStoryClickListener
+              )
             itemList.add(ongoingStoryViewModel)
           }
         }
@@ -96,7 +102,11 @@ class RecentlyPlayedFragmentPresenter @Inject constructor(
           itemList.add(olderSectionTitleViewModel)
           for (promotedStory in it.olderStoryList) {
             val ongoingStoryViewModel =
-              OngoingStoryViewModel(promotedStory, fragment as OngoingStoryClickListener)
+              OngoingStoryViewModel(
+                promotedStory,
+                entityType,
+                fragment as OngoingStoryClickListener
+              )
             itemList.add(ongoingStoryViewModel)
           }
         }

app/src/main/java/org/oppia/app/home/topiclist/PromotedStoryViewModel.kt

@@ -14,7 +14,8 @@ import org.oppia.app.viewmodel.ObservableViewModel
 /** [ViewModel] for displaying a promoted story. */
 class PromotedStoryViewModel(
   private val activity: AppCompatActivity,
-  private val internalProfileId: Int
+  private val internalProfileId: Int,
+  val entityType: String
 ) :
   ObservableViewModel(),
   RouteToTopicPlayStoryListener {

app/src/main/java/org/oppia/app/home/topiclist/TopicSummaryViewModel.kt

@@ -15,6 +15,7 @@ const val DARKEN_SATURATION_MULTIPLIER: Float = 1.2f
 /** The view model corresponding to topic summaries in the topic summary RecyclerView. */
 class TopicSummaryViewModel(
   val topicSummary: TopicSummary,
+  val entityType: String,
   private val topicSummaryClickListener: TopicSummaryClickListener
 ) : HomeItemViewModel() {
   val name: String = topicSummary.name

app/src/main/java/org/oppia/app/ongoingtopiclist/OngoingTopicItemViewModel.kt

@@ -4,4 +4,4 @@ import androidx.lifecycle.ViewModel
 import org.oppia.app.model.Topic
 
 /** [ViewModel] for displaying topic item in [OngoingTopicListActivity]. */
-class OngoingTopicItemViewModel(val topic: Topic) : ViewModel()
+class OngoingTopicItemViewModel(val topic: Topic, val entityType: String) : ViewModel()

app/src/main/java/org/oppia/app/ongoingtopiclist/OngoingTopicListViewModel.kt

@@ -9,13 +9,15 @@ import org.oppia.app.model.ProfileId
 import org.oppia.domain.topic.TopicController
 import org.oppia.util.data.AsyncResult
 import org.oppia.util.logging.ConsoleLogger
+import org.oppia.util.parser.TopicHtmlParserEntityType
 import javax.inject.Inject
 
 /** The ViewModel for [OngoingTopicListFragment]. */
 @FragmentScope
 class OngoingTopicListViewModel @Inject constructor(
   private val topicController: TopicController,
-  private val logger: ConsoleLogger
+  private val logger: ConsoleLogger,
+  @TopicHtmlParserEntityType private val entityType: String
 ) : ViewModel() {
   /** [internalProfileId] needs to be set before any of the live data members can be accessed. */
   private var internalProfileId: Int = -1
@@ -57,7 +59,7 @@ class OngoingTopicListViewModel @Inject constructor(
     val itemViewModelList: MutableList<OngoingTopicItemViewModel> = mutableListOf()
     itemViewModelList.addAll(
       ongoingTopicList.topicList.map { topic ->
-        OngoingTopicItemViewModel(topic)
+        OngoingTopicItemViewModel(topic, entityType)
       }
     )
     return itemViewModelList

app/src/main/java/org/oppia/app/profileprogress/ProfileProgressViewModel.kt

@@ -17,6 +17,7 @@ import org.oppia.domain.topic.TopicController
 import org.oppia.domain.topic.TopicListController
 import org.oppia.util.data.AsyncResult
 import org.oppia.util.logging.ConsoleLogger
+import org.oppia.util.parser.StoryHtmlParserEntityType
 import javax.inject.Inject
 
 /** The [ViewModel] for [ProfileProgressFragment]. */
@@ -27,7 +28,8 @@ class ProfileProgressViewModel @Inject constructor(
   private val profileManagementController: ProfileManagementController,
   private val topicController: TopicController,
   private val topicListController: TopicListController,
-  private val logger: ConsoleLogger
+  private val logger: ConsoleLogger,
+  @StoryHtmlParserEntityType private val entityType: String
 ) : ViewModel() {
   /** [internalProfileId] needs to be set before any of the live data members can be accessed. */
   private var internalProfileId: Int = -1
@@ -109,7 +111,7 @@ class ProfileProgressViewModel @Inject constructor(
     }
     itemViewModelList.addAll(
       itemList.map { story ->
-        RecentlyPlayedStorySummaryViewModel(story) as ProfileProgressItemViewModel
+        RecentlyPlayedStorySummaryViewModel(story, entityType)
       }
     )
     return itemViewModelList

app/src/main/java/org/oppia/app/profileprogress/RecentlyPlayedStorySummaryViewModel.kt

@@ -3,5 +3,7 @@ package org.oppia.app.profileprogress
 import org.oppia.app.model.PromotedStory
 
 /** Recently played item [ViewModel] for the recycler view in [ProfileProgressFragment]. */
-class RecentlyPlayedStorySummaryViewModel(val promotedStory: PromotedStory) :
-  ProfileProgressItemViewModel()
+class RecentlyPlayedStorySummaryViewModel(
+  val promotedStory: PromotedStory,
+  val entityType: String
+) : ProfileProgressItemViewModel()

app/src/main/java/org/oppia/app/story/StoryViewModel.kt

@@ -16,6 +16,7 @@ import org.oppia.domain.exploration.ExplorationDataController
 import org.oppia.domain.topic.TopicController
 import org.oppia.util.data.AsyncResult
 import org.oppia.util.logging.ConsoleLogger
+import org.oppia.util.parser.StoryHtmlParserEntityType
 import javax.inject.Inject
 
 /** The ViewModel for [StoryFragment]. */
@@ -24,7 +25,8 @@ class StoryViewModel @Inject constructor(
   private val fragment: Fragment,
   private val topicController: TopicController,
   private val explorationDataController: ExplorationDataController,
-  private val logger: ConsoleLogger
+  private val logger: ConsoleLogger,
+  @StoryHtmlParserEntityType val entityType: String
 ) : ViewModel() {
   private var internalProfileId: Int = -1
   private lateinit var topicId: String
@@ -106,7 +108,8 @@ class StoryViewModel @Inject constructor(
           internalProfileId,
           topicId,
           storyId,
-          chapter
+          chapter,
+          entityType
         )
       }
     )

app/src/main/java/org/oppia/app/story/storyitemviewmodel/StoryChapterSummaryViewModel.kt

@@ -22,7 +22,8 @@ class StoryChapterSummaryViewModel(
   val internalProfileId: Int,
   val topicId: String,
   val storyId: String,
-  val chapterSummary: ChapterSummary
+  val chapterSummary: ChapterSummary,
+  val entityType: String
 ) : StoryItemViewModel() {
   val explorationId: String = chapterSummary.explorationId
   val name: String = chapterSummary.name