[Manhastro] Fix chapter list (#2040)

Close #1376 #1362

src/main/kotlin/org/koitharu/kotatsu/parsers/site/madara/pt/Manhastro.kt

@@ -1,15 +1,19 @@
 package org.koitharu.kotatsu.parsers.site.madara.pt
 
+import org.jsoup.nodes.Document
 import org.koitharu.kotatsu.parsers.MangaLoaderContext
 import org.koitharu.kotatsu.parsers.MangaSourceParser
+import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaChapter
 import org.koitharu.kotatsu.parsers.model.MangaPage
 import org.koitharu.kotatsu.parsers.model.MangaParserSource
 import org.koitharu.kotatsu.parsers.site.madara.MadaraParser
 import org.koitharu.kotatsu.parsers.util.generateUid
+import org.koitharu.kotatsu.parsers.util.mapChapters
 import org.koitharu.kotatsu.parsers.util.parseHtml
 import org.koitharu.kotatsu.parsers.util.selectFirstOrThrow
 import org.koitharu.kotatsu.parsers.util.toAbsoluteUrl
+import org.koitharu.kotatsu.parsers.util.toRelativeUrl
 
 @MangaSourceParser("MANHASTRO", "Manhastro", "pt")
 internal class Manhastro(context: MangaLoaderContext) :
@@ -35,4 +39,42 @@ internal class Manhastro(context: MangaLoaderContext) :
 			)
 		}
 	}
+
+	override suspend fun getChapters(manga: Manga, doc: Document): List<MangaChapter> {
+		val initialChapters = super.getChapters(manga, doc)
+
+		if (initialChapters.isEmpty()) {
+			return initialChapters
+		}
+
+		// Use the URL of the first (latest) chapter to fetch the chapter page.
+		val firstChapterUrl = initialChapters.first().url.toAbsoluteUrl(domain)
+		val chapterPageDoc = webClient.httpGet(firstChapterUrl).parseHtml()
+
+		// Select all <option> elements from the chapter selection dropdown.
+		val options = chapterPageDoc.select("select.single-chapter-select option")
+
+		if (options.isNotEmpty()) {
+			// The dropdown list is newest-to-oldest
+			return options.mapChapters(reversed = true) { i, option ->
+				val href = option.attr("data-redirect").toRelativeUrl(domain)
+				val name = option.text().trim()
+
+				MangaChapter(
+					id = generateUid(href),
+					url = href,
+					title = name,
+					number = i + 1f,
+					volume = 0,
+					uploadDate = 0L, // Date is not available in the dropdown
+					source = source,
+					scanlator = null,
+					branch = null,
+				)
+			}
+		}
+
+		// If the dropdown wasn't found for some reason, return the initial (short) list as a fallback.
+		return initialChapters
+	}
 }