From 18aed05f8950535e4dcc9a0ead3f731651b62ada Mon Sep 17 00:00:00 2001
From: Slowlife <slowlife1165@gmail.com>
Date: Wed, 10 May 2023 20:44:20 +0700
Subject: [PATCH] Manhua SY: Fix chapter pages and latest/popular manhua
 (#16376)

* Manhua SY: Fix chapter pages and latest/popular manhua

* reformat
---
 .../madara/manhuasy/additional.gradle         |  3 ++
 .../overrides/madara/manhuasy/src/ManhuaSY.kt | 53 +++++++++++++++++++
 .../multisrc/madara/MadaraGenerator.kt        |  2 +-
 3 files changed, 57 insertions(+), 1 deletion(-)
 create mode 100644 multisrc/overrides/madara/manhuasy/additional.gradle
 create mode 100644 multisrc/overrides/madara/manhuasy/src/ManhuaSY.kt

diff --git a/multisrc/overrides/madara/manhuasy/additional.gradle b/multisrc/overrides/madara/manhuasy/additional.gradle
new file mode 100644
index 000000000..06abd18c6
--- /dev/null
+++ b/multisrc/overrides/madara/manhuasy/additional.gradle
@@ -0,0 +1,3 @@
+dependencies {
+    implementation(project(':lib-cryptoaes'))
+}
\ No newline at end of file
diff --git a/multisrc/overrides/madara/manhuasy/src/ManhuaSY.kt b/multisrc/overrides/madara/manhuasy/src/ManhuaSY.kt
new file mode 100644
index 000000000..d4bebcedf
--- /dev/null
+++ b/multisrc/overrides/madara/manhuasy/src/ManhuaSY.kt
@@ -0,0 +1,53 @@
+package eu.kanade.tachiyomi.extension.en.manhuasy
+
+import android.util.Base64
+import eu.kanade.tachiyomi.lib.cryptoaes.CryptoAES
+import eu.kanade.tachiyomi.multisrc.madara.Madara
+import eu.kanade.tachiyomi.source.model.Page
+import kotlinx.serialization.json.jsonArray
+import kotlinx.serialization.json.jsonObject
+import kotlinx.serialization.json.jsonPrimitive
+import org.jsoup.nodes.Document
+
+class ManhuaSY : Madara("Manhua SY", "https://www.manhuasy.com", "en") {
+    override val mangaSubString = "manhua"
+    override fun pageListParse(document: Document): List<Page> {
+        val chapterProtector = document.getElementById("chapter-protector-data")?.html()
+            ?: return super.pageListParse(document)
+
+        val password = chapterProtector
+            .substringAfter("wpmangaprotectornonce='")
+            .substringBefore("';")
+        val chapterData = json.parseToJsonElement(
+            chapterProtector
+                .substringAfter("chapter_data='")
+                .substringBefore("';")
+                .replace("\\/", "/"),
+        ).jsonObject
+
+        val unsaltedCiphertext = Base64.decode(chapterData["ct"]!!.jsonPrimitive.content, Base64.DEFAULT)
+        val salt = chapterData["s"]!!.jsonPrimitive.content.decodeHex()
+        val ciphertext = SALTED + salt + unsaltedCiphertext
+
+        val rawImgArray = CryptoAES.decrypt(Base64.encodeToString(ciphertext, Base64.DEFAULT), password)
+        val imgArrayString = json.parseToJsonElement(rawImgArray).jsonPrimitive.content
+        val imgArray = json.parseToJsonElement(imgArrayString).jsonArray
+
+        return imgArray.mapIndexed { idx, it ->
+            Page(idx, document.location(), it.jsonPrimitive.content)
+        }
+    }
+
+    // https://stackoverflow.com/a/66614516
+    private fun String.decodeHex(): ByteArray {
+        check(length % 2 == 0) { "Must have an even length" }
+
+        return chunked(2)
+            .map { it.toInt(16).toByte() }
+            .toByteArray()
+    }
+
+    companion object {
+        val SALTED = "Salted__".toByteArray(Charsets.UTF_8)
+    }
+}
diff --git a/multisrc/src/main/java/eu/kanade/tachiyomi/multisrc/madara/MadaraGenerator.kt b/multisrc/src/main/java/eu/kanade/tachiyomi/multisrc/madara/MadaraGenerator.kt
index c5c6bc2de..dce023715 100644
--- a/multisrc/src/main/java/eu/kanade/tachiyomi/multisrc/madara/MadaraGenerator.kt
+++ b/multisrc/src/main/java/eu/kanade/tachiyomi/multisrc/madara/MadaraGenerator.kt
@@ -273,7 +273,7 @@ class MadaraGenerator : ThemeSourceGenerator {
         SingleLang("Manhua ES", "https://manhuaes.com", "en", overrideVersionCode = 6),
         SingleLang("Manhua Kiss", "https://manhuakiss.com", "en", isNsfw = true, overrideVersionCode = 1),
         SingleLang("Manhua Plus", "https://manhuaplus.com", "en", overrideVersionCode = 6),
-        SingleLang("Manhua SY", "https://www.manhuasy.com", "en", overrideVersionCode = 1),
+        SingleLang("Manhua SY", "https://www.manhuasy.com", "en", overrideVersionCode = 2),
         SingleLang("ManhuaBox", "https://manhuabox.net", "en", overrideVersionCode = 2),
         SingleLang("ManhuaChill", "https://manhuachill.com", "en"),
         SingleLang("ManhuaFast", "https://manhuafast.com", "en", overrideVersionCode = 2),