Add documentation to library presenter

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryPresenter.kt

@@ -53,28 +53,27 @@ class LibraryPresenter(
 
     private val loggedServices by lazy { Injekt.get<TrackManager>().services.filter { it.isLogged } }
 
-    /**
-     * Categories of the library.
-     */
+    /** Current categories of the library. */
     var categories: List<Category> = emptyList()
         private set
 
+    /** All categories of the library, in case they are hidden because of hide categories is on */
     var allCategories: List<Category> = emptyList()
         private set
 
-    /**
-     * List of all manga to update the
-     */
+    /** List of all manga to update the */
     var libraryItems: List<LibraryItem> = emptyList()
     private var allLibraryItems: List<LibraryItem> = emptyList()
 
     private var totalChapters: Map<Long, Int>? = null
 
+    /** Save the current list to speed up loading later */
     fun onDestroy() {
         lastLibraryItems = libraryItems
         lastCategories = categories
     }
 
+    /** Restore the static items to speed up reloading the view */
     fun onRestore() {
         libraryItems = lastLibraryItems ?: return
         categories = lastCategories ?: return
@@ -82,6 +81,7 @@ class LibraryPresenter(
         lastLibraryItems = null
     }
 
+    /** Get favorited manga for library and sort and filter it */
     fun getLibrary() {
         launchUI {
             totalChapters = null
@@ -107,11 +107,11 @@ class LibraryPresenter(
     }
 
     /**
-     * Applies library filters to the given map of manga.
+     * Applies library filters to the given list of manga.
      *
-     * @param map the map to filter.
+     * @param items the items to filter.
      */
-    private fun applyFilters(map: List<LibraryItem>): List<LibraryItem> {
+    private fun applyFilters(items: List<LibraryItem>): List<LibraryItem> {
         val filterDownloaded = preferences.filterDownloaded().getOrDefault()
 
         val filterUnread = preferences.filterUnread().getOrDefault()
@@ -124,7 +124,7 @@ class LibraryPresenter(
 
         val filterTrackers = FilterBottomSheet.FILTER_TRACKER
 
-        return map.filter f@{ item ->
+        return items.filter f@{ item ->
             if (item.manga.isBlank()) {
                 return@f filterDownloaded == 0 && filterUnread == 0 && filterCompleted == 0 &&
                     filterTracked == 0 && filterMangaType == 0
@@ -193,7 +193,7 @@ class LibraryPresenter(
     /**
      * Sets downloaded chapter count to each manga.
      *
-     * @param map the map of manga.
+     * @param itemList the map of manga.
      */
     private fun setDownloadCount(itemList: List<LibraryItem>) {
         if (!preferences.downloadBadge().getOrDefault()) {
@@ -217,11 +217,11 @@ class LibraryPresenter(
     }
 
     /**
-     * Applies library sorting to the given map of manga.
+     * Applies library sorting to the given list of manga.
      *
-     * @param map the map to sort.
+     * @param itemList the map to sort.
      */
-    private fun applySort(map: List<LibraryItem>): List<LibraryItem> {
+    private fun applySort(itemList: List<LibraryItem>): List<LibraryItem> {
         val sortingMode = preferences.librarySortingMode().getOrDefault()
 
         val lastReadManga by lazy {
@@ -280,9 +280,10 @@ class LibraryPresenter(
         else
             Collections.reverseOrder(sortFn)
 
-        return map.sortedWith(comparator)
+        return itemList.sortedWith(comparator)
     }
 
+    /** Set the total chapters for the manga in the library */
     private fun setTotalChapters() {
         if (totalChapters != null) return
         val mangaMap = allLibraryItems
@@ -291,6 +292,10 @@ class LibraryPresenter(
         }.toMap()
     }
 
+    /** Gets the category by id
+     *
+     * @param categoryId id of the categoty to get
+     */
     private fun getCategory(categoryId: Int): Category {
         val category = categories.find { it.id == categoryId } ?: createDefaultCategory()
         if (category.isFirst == null) {
@@ -301,14 +306,20 @@ class LibraryPresenter(
         return category
     }
 
+    /**
+     * Sort 2 manga by the category's sorting
+     *
+     * @param i1 the first manga
+     * @param i2 the second manga to compare
+     * @param lastReadManga map of the last read of the library
+     */
     private fun sortCategory(
         i1: LibraryItem,
         i2: LibraryItem,
-        lastReadManga: Map<Long, Int>,
-        initCat: Category? = null
+        lastReadManga: Map<Long, Int>
     ): Int {
-        return if (initCat != null || i1.manga.category == i2.manga.category) {
-            val category = initCat ?: allCategories.find { it.id == i1.manga.category } ?: return 0
+        return if (i1.manga.category == i2.manga.category) {
+            val category = allCategories.find { it.id == i1.manga.category } ?: return 0
             if (category.mangaOrder.isNullOrEmpty() && category.mangaSort == null) {
                 category.changeSortTo(preferences.librarySortingMode().getOrDefault())
                 if (category.id == 0) preferences.defaultMangaOrder()
@@ -371,6 +382,12 @@ class LibraryPresenter(
         }
     }
 
+    /**
+     * Sort 2 manga by the their title (and remove articles if need be)
+     *
+     * @param i1 the first manga
+     * @param i2 the second manga to compare
+     */
     private fun sortAlphabetical(i1: LibraryItem, i2: LibraryItem): Int {
         return if (preferences.removeArticles().getOrDefault())
             i1.manga.title.removeArticles().compareTo(i2.manga.title.removeArticles(), true)
@@ -380,7 +397,7 @@ class LibraryPresenter(
     /**
      * Get the categories and all its manga from the database.
      *
-     * @return an observable of the categories and its manga.
+     * @return an list of all the manga in a itemized form.
      */
     private fun getLibraryFromDB(): List<LibraryItem> {
         val categories = db.getCategories().executeAsBlocking().toMutableList()
@@ -436,6 +453,7 @@ class LibraryPresenter(
         return items
     }
 
+    /** Create a default category with the sort set */
     private fun createDefaultCategory(): Category {
         val default = Category.createDefault(context)
         default.order = -1
@@ -445,9 +463,7 @@ class LibraryPresenter(
         return default
     }
 
-    /**
-     * Requests the library to be filtered.
-     */
+    /** Requests the library to be filtered. */
     fun requestFilterUpdate() {
         launchUI {
             var mangaMap = allLibraryItems
@@ -458,9 +474,7 @@ class LibraryPresenter(
         }
     }
 
-    /**
-     * Requests the library to have download badges added/removed.
-     */
+    /** Requests the library to have download badges added/removed. */
     fun requestDownloadBadgesUpdate() {
         launchUI {
             val mangaMap = allLibraryItems
@@ -473,9 +487,7 @@ class LibraryPresenter(
         }
     }
 
-    /**
-     * Requests the library to have unread badges changed.
-     */
+    /** Requests the library to have unread badges changed. */
     fun requestUnreadBadgesUpdate() {
         launchUI {
             val mangaMap = allLibraryItems
@@ -488,9 +500,7 @@ class LibraryPresenter(
         }
     }
 
-    /**
-     * Requests the library to be sorted.
-     */
+    /** Requests the library to be sorted. */
     private fun requestSortUpdate() {
         launchUI {
             var mangaMap = libraryItems
@@ -528,6 +538,7 @@ class LibraryPresenter(
         }
     }
 
+    /** Remove manga from the library and delete the downloads */
     fun confirmDeletion(mangas: List<Manga>) {
         scope.launch {
             val mangaToDelete = mangas.distinctBy { it.id }
@@ -541,6 +552,7 @@ class LibraryPresenter(
         }
     }
 
+    /** Called when Library Service updates a manga, update the item as well */
     fun updateManga(manga: LibraryManga) {
         scope.launch {
             val rawMap = allLibraryItems
@@ -559,6 +571,7 @@ class LibraryPresenter(
         }
     }
 
+    /** Undo the removal of the manga once in library */
     fun reAddMangas(mangas: List<Manga>) {
         scope.launch {
             val mangaToAdd = mangas.distinctBy { it.id }
@@ -587,11 +600,13 @@ class LibraryPresenter(
         getLibrary()
     }
 
+    /** Returns first unread chapter of a manga */
     fun getFirstUnread(manga: Manga): Chapter? {
         val chapters = db.getChapters(manga).executeAsBlocking()
         return chapters.sortedByDescending { it.source_order }.find { !it.read }
     }
 
+    /** Update a category's sorting */
     fun sortCategory(catId: Int, order: Int) {
         val category = categories.find { catId == it.id } ?: return
         category.mangaSort = ('a' + (order - 1))
@@ -607,6 +622,7 @@ class LibraryPresenter(
         }
     }
 
+    /** Update a category's order */
     fun rearrangeCategory(catId: Int?, mangaIds: List<Long>) {
         scope.launch {
             val category = categories.find { catId == it.id } ?: return@launch
@@ -618,6 +634,7 @@ class LibraryPresenter(
         }
     }
 
+    /** Shift a manga's category via drag & drop */
     fun moveMangaToCategory(
         manga: LibraryManga,
         catId: Int?,
@@ -655,6 +672,7 @@ class LibraryPresenter(
         }
     }
 
+    /** Returns if manga is in a category by id */
     fun mangaIsInCategory(manga: LibraryManga, catId: Int?): Boolean {
         val categories = db.getCategoriesForManga(manga).executeAsBlocking().map { it.id }
         return catId in categories
@@ -664,6 +682,7 @@ class LibraryPresenter(
         private var lastLibraryItems: List<LibraryItem>? = null
         private var lastCategories: List<Category>? = null
 
+        /** Give library manga to a date added based on min chapter fetch + remove custom info */
         fun updateDB() {
             val db: DatabaseHelper = Injekt.get()
             db.inTransaction {