Revert removal of last chapter/updated from manga info

app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaController.kt

@@ -28,6 +28,7 @@ import eu.kanade.tachiyomi.ui.manga.chapter.ChaptersController
 import eu.kanade.tachiyomi.ui.manga.info.MangaInfoController
 import eu.kanade.tachiyomi.ui.manga.track.TrackController
 import eu.kanade.tachiyomi.util.system.toast
+import java.util.Date
 import kotlinx.android.synthetic.main.main_activity.tabs
 import rx.Subscription
 import uy.kohesive.injekt.Injekt
@@ -64,6 +65,10 @@ class MangaController : RxController<PagerControllerBinding>, TabbedController {
 
     val fromSource = args.getBoolean(FROM_SOURCE_EXTRA, false)
 
+    val lastUpdateRelay: BehaviorRelay<Date> = BehaviorRelay.create()
+
+    val chapterCountRelay: BehaviorRelay<Float> = BehaviorRelay.create()
+
     val mangaFavoriteRelay: PublishRelay<Boolean> = PublishRelay.create()
 
     private val trackingIconRelay: BehaviorRelay<Boolean> = BehaviorRelay.create()

app/src/main/java/eu/kanade/tachiyomi/ui/manga/chapter/ChaptersController.kt

@@ -71,7 +71,10 @@ class ChaptersController :
 
     override fun createPresenter(): ChaptersPresenter {
         val ctrl = parentController as MangaController
-        return ChaptersPresenter(ctrl.manga!!, ctrl.source!!, ctrl.mangaFavoriteRelay)
+        return ChaptersPresenter(
+            ctrl.manga!!, ctrl.source!!,
+            ctrl.chapterCountRelay, ctrl.lastUpdateRelay, ctrl.mangaFavoriteRelay
+        )
     }
 
     override fun inflateView(inflater: LayoutInflater, container: ViewGroup): View {

app/src/main/java/eu/kanade/tachiyomi/ui/manga/chapter/ChaptersPresenter.kt

@@ -1,6 +1,7 @@
 package eu.kanade.tachiyomi.ui.manga.chapter
 
 import android.os.Bundle
+import com.jakewharton.rxrelay.BehaviorRelay
 import com.jakewharton.rxrelay.PublishRelay
 import eu.kanade.tachiyomi.data.database.DatabaseHelper
 import eu.kanade.tachiyomi.data.database.models.Chapter
@@ -13,6 +14,7 @@ import eu.kanade.tachiyomi.source.Source
 import eu.kanade.tachiyomi.ui.base.presenter.BasePresenter
 import eu.kanade.tachiyomi.util.chapter.syncChaptersWithSource
 import eu.kanade.tachiyomi.util.lang.isNullOrUnsubscribed
+import java.util.Date
 import rx.Observable
 import rx.Subscription
 import rx.android.schedulers.AndroidSchedulers
@@ -27,6 +29,8 @@ import uy.kohesive.injekt.api.get
 class ChaptersPresenter(
     val manga: Manga,
     val source: Source,
+    private val chapterCountRelay: BehaviorRelay<Float>,
+    private val lastUpdateRelay: BehaviorRelay<Date>,
     private val mangaFavoriteRelay: PublishRelay<Boolean>,
     val preferences: PreferencesHelper = Injekt.get(),
     private val db: DatabaseHelper = Injekt.get(),
@@ -86,6 +90,20 @@ class ChaptersPresenter(
 
                     // Listen for download status changes
                     observeDownloads()
+
+                    // Emit the number of chapters to the info tab.
+                    chapterCountRelay.call(
+                        chapters.maxBy { it.chapter_number }?.chapter_number
+                            ?: 0f
+                    )
+
+                    // Emit the upload date of the most recent chapter
+                    lastUpdateRelay.call(
+                        Date(
+                            chapters.maxBy { it.date_upload }?.date_upload
+                                ?: 0
+                        )
+                    )
                 }
                 .subscribe { chaptersRelay.call(it) }
         )

app/src/main/java/eu/kanade/tachiyomi/ui/manga/info/MangaInfoController.kt

@@ -14,6 +14,7 @@ import eu.kanade.tachiyomi.data.database.models.Manga
 import eu.kanade.tachiyomi.data.glide.GlideApp
 import eu.kanade.tachiyomi.data.glide.toMangaThumbnail
 import eu.kanade.tachiyomi.data.preference.PreferencesHelper
+import eu.kanade.tachiyomi.data.preference.getOrDefault
 import eu.kanade.tachiyomi.databinding.MangaInfoControllerBinding
 import eu.kanade.tachiyomi.source.Source
 import eu.kanade.tachiyomi.source.SourceManager
@@ -37,6 +38,9 @@ import eu.kanade.tachiyomi.util.view.setChips
 import eu.kanade.tachiyomi.util.view.snack
 import eu.kanade.tachiyomi.util.view.visible
 import eu.kanade.tachiyomi.util.view.visibleIf
+import java.text.DateFormat
+import java.text.DecimalFormat
+import java.util.Date
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
 import reactivecircus.flowbinding.android.view.clicks
@@ -57,13 +61,20 @@ class MangaInfoController(private val fromSource: Boolean = false) :
 
     private val preferences: PreferencesHelper by injectLazy()
 
+    private val dateFormat: DateFormat by lazy {
+        preferences.dateFormat().getOrDefault()
+    }
+
     private var initialLoad: Boolean = true
 
     private var thumbnailUrl: String? = null
 
     override fun createPresenter(): MangaInfoPresenter {
         val ctrl = parentController as MangaController
-        return MangaInfoPresenter(ctrl.manga!!, ctrl.source!!, ctrl.mangaFavoriteRelay)
+        return MangaInfoPresenter(
+            ctrl.manga!!, ctrl.source!!,
+            ctrl.chapterCountRelay, ctrl.lastUpdateRelay, ctrl.mangaFavoriteRelay
+        )
     }
 
     override fun inflateView(inflater: LayoutInflater, container: ViewGroup): View {
@@ -316,6 +327,27 @@ class MangaInfoController(private val fromSource: Boolean = false) :
         binding.mangaGenresTagsFullChips.visibleIf { !isExpanded }
     }
 
+    /**
+     * Update chapter count TextView.
+     *
+     * @param count number of chapters.
+     */
+    fun setChapterCount(count: Float) {
+        if (count > 0f) {
+            binding.mangaChapters.text = DecimalFormat("#.#").format(count)
+        } else {
+            binding.mangaChapters.text = resources?.getString(R.string.unknown)
+        }
+    }
+
+    fun setLastUpdateDate(date: Date) {
+        if (date.time != 0L) {
+            binding.mangaLastUpdate.text = dateFormat.format(date)
+        } else {
+            binding.mangaLastUpdate.text = resources?.getString(R.string.unknown)
+        }
+    }
+
     /**
      * Toggles the favorite status and asks for confirmation to delete downloaded chapters.
      */

app/src/main/java/eu/kanade/tachiyomi/ui/manga/info/MangaInfoPresenter.kt

@@ -1,6 +1,7 @@
 package eu.kanade.tachiyomi.ui.manga.info
 
 import android.os.Bundle
+import com.jakewharton.rxrelay.BehaviorRelay
 import com.jakewharton.rxrelay.PublishRelay
 import eu.kanade.tachiyomi.data.cache.CoverCache
 import eu.kanade.tachiyomi.data.database.DatabaseHelper
@@ -11,6 +12,7 @@ import eu.kanade.tachiyomi.data.download.DownloadManager
 import eu.kanade.tachiyomi.source.Source
 import eu.kanade.tachiyomi.ui.base.presenter.BasePresenter
 import eu.kanade.tachiyomi.util.lang.isNullOrUnsubscribed
+import java.util.Date
 import rx.Observable
 import rx.Subscription
 import rx.android.schedulers.AndroidSchedulers
@@ -26,6 +28,8 @@ import uy.kohesive.injekt.api.get
 class MangaInfoPresenter(
     val manga: Manga,
     val source: Source,
+    private val chapterCountRelay: BehaviorRelay<Float>,
+    private val lastUpdateRelay: BehaviorRelay<Date>,
     private val mangaFavoriteRelay: PublishRelay<Boolean>,
     private val db: DatabaseHelper = Injekt.get(),
     private val downloadManager: DownloadManager = Injekt.get(),
@@ -46,10 +50,18 @@ class MangaInfoPresenter(
         super.onCreate(savedState)
         sendMangaToView()
 
+        // Update chapter count
+        chapterCountRelay.observeOn(AndroidSchedulers.mainThread())
+            .subscribeLatestCache(MangaInfoController::setChapterCount)
+
         // Update favorite status
         mangaFavoriteRelay.observeOn(AndroidSchedulers.mainThread())
             .subscribe { setFavorite(it) }
             .apply { add(this) }
+
+        // update last update date
+        lastUpdateRelay.observeOn(AndroidSchedulers.mainThread())
+            .subscribeLatestCache(MangaInfoController::setLastUpdateDate)
     }
 
     /**