[DesuMe] Genres in list

src/main/kotlin/org/koitharu/kotatsu/parsers/site/DesuMeParser.kt

@@ -1,5 +1,6 @@
 package org.koitharu.kotatsu.parsers.site
 
+import androidx.collection.ArrayMap
 import org.koitharu.kotatsu.parsers.MangaLoaderContext
 import org.koitharu.kotatsu.parsers.MangaSourceParser
 import org.koitharu.kotatsu.parsers.PagedMangaParser
@@ -24,6 +25,8 @@ internal class DesuMeParser(context: MangaLoaderContext) : PagedMangaParser(cont
 		SortOrder.ALPHABETICAL,
 	)
 
+	private val tagsCache = SuspendLazy(::fetchTags)
+
 	override suspend fun getListPage(
 		page: Int,
 		query: String?,
@@ -54,10 +57,12 @@ internal class DesuMeParser(context: MangaLoaderContext) : PagedMangaParser(cont
 			?: throw ParseException("Invalid response", url)
 		val total = json.length()
 		val list = ArrayList<Manga>(total)
+		val tagsMap = tagsCache.tryGet().getOrNull()
 		for (i in 0 until total) {
 			val jo = json.getJSONObject(i)
 			val cover = jo.getJSONObject("image")
 			val id = jo.getLong("id")
+			val genres = jo.getString("genres").split(',')
 			list += Manga(
 				url = "/manga/api/$id",
 				publicUrl = jo.getString("url"),
@@ -73,7 +78,13 @@ internal class DesuMeParser(context: MangaLoaderContext) : PagedMangaParser(cont
 				rating = jo.getDouble("score").toFloat().coerceIn(0f, 1f),
 				id = generateUid(id),
 				isNsfw = false,
-                tags = emptySet(),
+				tags = if (!tagsMap.isNullOrEmpty()) {
+					genres.mapNotNullToSet { g ->
+						tagsMap[g.trim().toTitleCase()]
+					}
+				} else {
+					emptySet()
+				},
 				author = null,
 				description = jo.getString("description"),
 			)
@@ -133,12 +144,27 @@ internal class DesuMeParser(context: MangaLoaderContext) : PagedMangaParser(cont
 	}
 
 	override suspend fun getTags(): Set<MangaTag> {
+		return tagsCache.get().values.toSet()
+	}
+
+	private fun getSortKey(sortOrder: SortOrder) =
+		when (sortOrder) {
+			SortOrder.ALPHABETICAL -> "name"
+			SortOrder.POPULARITY -> "popular"
+			SortOrder.UPDATED -> "updated"
+			SortOrder.NEWEST -> "id"
+			else -> "updated"
+		}
+
+	private suspend fun fetchTags(): Map<String, MangaTag> {
 		val doc = webClient.httpGet("https://${domain}/manga/").parseHtml()
 		val root = doc.body().requireElementById("animeFilter")
 			.selectFirstOrThrow(".catalog-genres")
-        return root.select("li").mapToSet {
+		val li = root.select("li")
+		val result = ArrayMap<String, MangaTag>(li.size)
+		li.forEach {
 			val input = it.selectFirstOrThrow("input")
-            MangaTag(
+			val tag = MangaTag(
 				source = source,
 				key = input.attr("data-genre-slug").ifEmpty {
 					it.parseFailed("data-genre-slug is empty")
@@ -147,15 +173,8 @@ internal class DesuMeParser(context: MangaLoaderContext) : PagedMangaParser(cont
 					it.parseFailed("data-genre-name is empty")
 				},
 			)
+			result[tag.title] = tag
 		}
-    }
+		return result
-
-    private fun getSortKey(sortOrder: SortOrder) =
-        when (sortOrder) {
-            SortOrder.ALPHABETICAL -> "name"
-            SortOrder.POPULARITY -> "popular"
-            SortOrder.UPDATED -> "updated"
-            SortOrder.NEWEST -> "id"
-            else -> "updated"
 	}
 }

src/main/kotlin/org/koitharu/kotatsu/parsers/util/SuspendLazy.kt

@@ -0,0 +1,36 @@
+package org.koitharu.kotatsu.parsers.util
+
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.sync.withLock
+
+class SuspendLazy<T>(
+	private val initializer: suspend () -> T,
+) {
+
+	private val mutex = Mutex()
+	private var cachedValue: Any? = Uninitialized
+
+	@Suppress("UNCHECKED_CAST")
+	suspend fun get(): T {
+		// fast way
+		cachedValue.let {
+			if (it !== Uninitialized) {
+				return it as T
+			}
+		}
+		return mutex.withLock {
+			cachedValue.let {
+				if (it !== Uninitialized) {
+					return it as T
+				}
+			}
+			val result = initializer()
+			cachedValue = result
+			result
+		}
+	}
+
+	suspend fun tryGet() = runCatchingCancellable { get() }
+
+	private object Uninitialized
+}