Add a migrate to GH message in GS main extension (#11528)

* Add a migrate to GH message in GS main extension.

* Fix missing override in nullableChapterFromElement.

multisrc/overrides/mmrcms/fallenangels/src/FallenAngels.kt

@@ -10,24 +10,12 @@ import java.util.Locale
 
 class FallenAngels : MMRCMS("Fallen Angels", "https://manga.fascans.com", "en") {
 
-    /**
-     * Parses the response from the site and returns a list of chapters.
-     *
-     * Overriden to allow for null chapters
-     *
-     * @param response the response from the site.
-     */
-    override fun chapterListParse(response: Response): List<SChapter> {
-        val document = response.asJsoup()
-        return document.select(chapterListSelector()).mapNotNull { nullableChapterFromElement(it) }
-    }
-
     /**
      * Returns a chapter from the given element.
      *
      * @param element an element obtained from [chapterListSelector].
      */
-    private fun nullableChapterFromElement(element: Element): SChapter? {
+    override fun nullableChapterFromElement(element: Element): SChapter? {
         val chapter = SChapter.create()
 
         val titleWrapper = element.select("[class^=chapter-title-rtl]").first()

multisrc/overrides/mmrcms/gekkouscan/src/GekkouScans.kt

@@ -4,8 +4,11 @@ import eu.kanade.tachiyomi.lib.ratelimit.RateLimitInterceptor
 import eu.kanade.tachiyomi.multisrc.mmrcms.MMRCMS
 import eu.kanade.tachiyomi.network.GET
 import eu.kanade.tachiyomi.source.model.Page
+import eu.kanade.tachiyomi.source.model.SChapter
+import eu.kanade.tachiyomi.util.asJsoup
 import okhttp3.OkHttpClient
 import okhttp3.Request
+import okhttp3.Response
 import java.util.concurrent.TimeUnit
 
 class GekkouScans : MMRCMS(
@@ -18,6 +21,22 @@ class GekkouScans : MMRCMS(
         .addInterceptor(RateLimitInterceptor(1, 2, TimeUnit.SECONDS))
         .build()
 
+    override fun chapterListParse(response: Response): List<SChapter> {
+        val document = response.asJsoup()
+        val chapters = document.select(chapterListSelector())
+            .mapNotNull(::nullableChapterFromElement)
+
+        val isExternal = document
+            .select("ul.domaintld > li.li:has(a[href*='hentai.gekkouscans.com.br'])")
+            .firstOrNull() != null
+
+        if (chapters.isEmpty() && isExternal) {
+            throw Exception(EXTERNAL_SERIES_ERROR)
+        }
+
+        return chapters
+    }
+
     override fun chapterListSelector() = "ul.domaintld > li.li:has(a[href^='$baseUrl'])"
 
     override fun imageRequest(page: Page): Request {
@@ -31,5 +50,8 @@ class GekkouScans : MMRCMS(
 
     companion object {
         private const val ACCEPT_IMAGE = "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8"
+
+        private const val EXTERNAL_SERIES_ERROR =
+            "Migre esta série para a extensão Gekkou Hentai para continuar lendo."
     }
 }

multisrc/src/main/java/eu/kanade/tachiyomi/multisrc/mmrcms/MMRCMS.kt

@@ -358,7 +358,7 @@ abstract class MMRCMS(
      *
      * @param element an element obtained from [chapterListSelector].
      */
-    private fun nullableChapterFromElement(element: Element): SChapter? {
+    protected open fun nullableChapterFromElement(element: Element): SChapter? {
         val chapter = SChapter.create()
 
         try {

multisrc/src/main/java/eu/kanade/tachiyomi/multisrc/mmrcms/MMRCMSSources.kt

@@ -63,7 +63,7 @@ class MMRCMSSources {
             SourceData.Single("Op-VF", "https://www.op-vf.com", "fr", className = "OpVF"),
             SourceData.Single("FR Scan", "https://frscan.cc", "fr", overrideVersionCode = 1),
             SourceData.Single("Ama Scans", "https://amascan.com", "pt-BR", isNsfw = true, overrideVersionCode = 2),
-            SourceData.Single("Gekkou Scans", "https://gekkou.com.br", "pt-BR", isNsfw = true, pkgName = "gekkouscan", overrideVersionCode = 11),
+            SourceData.Single("Gekkou Scans", "https://gekkou.com.br", "pt-BR", isNsfw = true, pkgName = "gekkouscan", overrideVersionCode = 12),
             SourceData.Single("Gekkou Hentai", "https://hentai.gekkouscans.com.br", "pt-BR", isNsfw = true),
             SourceData.Single("White Cloud Pavilion", "https://whitecloudpavilion.com/manga/patreon", "en"),
             // NOTE: THIS SOURCE CONTAINS A CUSTOM LANGUAGE SYSTEM (which will be ignored)!