Sort chapters by upload date (#3180)

* Added sorting by upload date

Spanish 'strings' contains the proper translation for the new feature.

* Added missing sorting cases handling

Previous commit missed some cases resulting in errors at runtime

* Implemented review changes

Shorter UI text and >= date comparison instead of >

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ChapterLoadStrategy.kt

@@ -35,3 +35,12 @@ class ChapterLoadByNumber {
         return chapters.sortedBy { it.chapter_number }
     }
 }
+
+/**
+ * Load strategy using the chapter upload date. This ordering ignores scanlators
+ */
+class ChapterLoadByUploadDate() {
+    fun get(allChapters: List<Chapter>): List<Chapter> {
+        return allChapters.sortedBy { it.date_upload }
+    }
+}

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderPresenter.kt

@@ -129,6 +129,7 @@ class ReaderPresenter(
         when (manga.sorting) {
             Manga.SORTING_SOURCE -> ChapterLoadBySource().get(chaptersForReader)
             Manga.SORTING_NUMBER -> ChapterLoadByNumber().get(chaptersForReader, selectedChapter)
+            Manga.SORTING_UPLOAD_DATE -> ChapterLoadByUploadDate().get(chaptersForReader)
             else -> error("Unknown sorting method")
         }.map(::ReaderChapter)
     }