chore(src): Multiple improvements and fixes (#233)

* Hackstore improvements

* VerAnimes improvements

* Pelisplushd improvements

* AnimeFenix improvements

* AnimeFlv Improvements

* AsiaLiveAction improvements

* TioAnime improvements and VidGuardExtractor added

* Replacing VidGuardExtractor files in extensions

* oppstrem fixed

Closes #220

lib/vidguard-extractor/build.gradle.kts

@@ -0,0 +1,8 @@
+plugins {
+    id("lib-android")
+}
+
+dependencies {
+    implementation(project(":lib:playlist-utils"))
+    implementation("org.mozilla:rhino:1.7.14")
+}

lib/vidguard-extractor/src/main/java/eu/kanade/tachiyomi/lib/vidguardextractor/VidGuardExtractor.kt

@@ -0,0 +1,104 @@
+package eu.kanade.tachiyomi.lib.vidguardextractor
+
+import android.util.Base64
+import android.util.Log
+import eu.kanade.tachiyomi.animesource.model.Video
+import eu.kanade.tachiyomi.lib.playlistutils.PlaylistUtils
+import eu.kanade.tachiyomi.network.GET
+import eu.kanade.tachiyomi.util.asJsoup
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.Json
+import okhttp3.OkHttpClient
+import org.mozilla.javascript.Context
+import org.mozilla.javascript.NativeJSON
+import org.mozilla.javascript.NativeObject
+import org.mozilla.javascript.Scriptable
+import uy.kohesive.injekt.injectLazy
+
+class VidGuardExtractor(private val client: OkHttpClient) {
+
+    private val playlistUtils by lazy { PlaylistUtils(client) }
+
+    private val json: Json by injectLazy()
+
+    fun videosFromUrl(url: String, prefix: String) = videosFromUrl(url) { "${prefix}VidGuard:$it" }
+
+    fun videosFromUrl(url: String, videoNameGen: (String) -> String = { quality -> "VidGuard:$quality" }): List<Video> {
+        val res = client.newCall(GET(url)).execute().asJsoup()
+        val scriptData = res.selectFirst("script:containsData(eval)")?.data() ?: return emptyList()
+
+        val jsonStr2 = json.decodeFromString<SvgObject>(runJS2(scriptData))
+        val playlistUrl = sigDecode(jsonStr2.stream)
+
+        return playlistUtils.extractFromHls(playlistUrl, videoNameGen = videoNameGen)
+    }
+
+    private fun sigDecode(url: String): String {
+        val sig = url.split("sig=")[1].split("&")[0]
+        val t = sig.chunked(2)
+            .joinToString("") { (Integer.parseInt(it, 16) xor 2).toChar().toString() }
+            .let {
+                val padding = when (it.length % 4) {
+                    2 -> "=="
+                    3 -> "="
+                    else -> ""
+                }
+                String(Base64.decode((it + padding).toByteArray(Charsets.UTF_8), Base64.DEFAULT))
+            }
+            .dropLast(5)
+            .reversed()
+            .toCharArray()
+            .apply {
+                for (i in indices step 2) {
+                    if (i + 1 < size) {
+                        this[i] = this[i + 1].also { this[i + 1] = this[i] }
+                    }
+                }
+            }
+            .concatToString()
+            .dropLast(5)
+        return url.replace(sig, t)
+    }
+
+    private fun runJS2(hideMyHtmlContent: String): String {
+        var result = ""
+        val r = Runnable {
+            val rhino = Context.enter()
+            rhino.initSafeStandardObjects()
+            rhino.optimizationLevel = -1
+            val scope: Scriptable = rhino.initSafeStandardObjects()
+            scope.put("window", scope, scope)
+            try {
+                rhino.evaluateString(
+                    scope,
+                    hideMyHtmlContent,
+                    "JavaScript",
+                    1,
+                    null,
+                )
+                val svgObject = scope.get("svg", scope)
+                result = if (svgObject is NativeObject) {
+                    NativeJSON.stringify(Context.getCurrentContext(), scope, svgObject, null, null)
+                        .toString()
+                } else {
+                    Context.toString(svgObject)
+                }
+            } catch (e: Exception) {
+                Log.i("Error", e.toString())
+            } finally {
+                Context.exit()
+            }
+        }
+        val t = Thread(ThreadGroup("A"), r, "thread_rhino", 2000000) // StackSize 2Mb: Run in a thread because rhino requires more stack size for large scripts.
+        t.start()
+        t.join()
+        t.interrupt()
+        return result
+    }
+}
+
+@Serializable
+data class SvgObject(
+    val stream: String,
+    val hash: String,
+)