Fix: delegate nhentai failed to load cover

Site might intended putting cover's type 'w' in JSON while it's in fact using 'cover.jpg.webp'

Author: cuong-tran

app/src/main/java/eu/kanade/tachiyomi/source/online/all/NHentai.kt

@@ -17,6 +17,7 @@ import eu.kanade.tachiyomi.source.online.HttpSource
 import eu.kanade.tachiyomi.source.online.MetadataSource
 import eu.kanade.tachiyomi.source.online.NamespaceSource
 import eu.kanade.tachiyomi.source.online.UrlImportableSource
+import eu.kanade.tachiyomi.util.asJsoup
 import exh.metadata.metadata.NHentaiSearchMetadata
 import exh.metadata.metadata.RaisedSearchMetadata
 import exh.metadata.metadata.base.RaisedTag
@@ -29,6 +30,7 @@ import kotlinx.serialization.Serializable
 import kotlinx.serialization.json.Json
 import okhttp3.CacheControl
 import okhttp3.Response
+import org.jsoup.nodes.Document
 
 class NHentai(delegate: HttpSource, val context: Context) :
     DelegatedHttpSource(delegate),
@@ -101,7 +103,8 @@ class NHentai(delegate: HttpSource, val context: Context) :
             preferredTitle = this@NHentai.preferredTitle
 
             jsonResponse.images?.let { images ->
-                coverImageType = images.cover?.type
+                coverImageType = input.asJsoup(strdata).parseCoverType()
+                    ?: images.cover?.type
                 images.pages.mapNotNull {
                     it.type
                 }.let {
@@ -129,6 +132,18 @@ class NHentai(delegate: HttpSource, val context: Context) :
         }
     }
 
+    // KMK -->
+    /**
+     * Site JSON is saying cover of type `w` but instead it's using cover like `cover.jpg.webp`
+     */
+    private fun Document.parseCoverType(): String? {
+        return selectFirst("#cover > a > img")?.attr("data-src")
+            ?.substringAfterLast('/')
+            ?.substringAfter('.')
+            ?.first()?.toString()
+    }
+    // KMK <--
+
     @Serializable
     data class JsonResponse(
         val id: Long,

source-api/src/commonMain/kotlin/exh/metadata/metadata/NHentaiSearchMetadata.kt

@@ -50,6 +50,7 @@ class NHentaiSearchMetadata : RaisedSearchMetadata() {
 
         val cover = if (mediaId != null) {
             // AZ -->
+            // Default media server for cover is always 1 (see in page header)
             val server = mediaServer ?: 1
             // AZ <--
             typeToExtension(coverImageType)?.let {