refactor: Move some extractor to libraries for datalife engine multisrc (#2246)

lib/upstream-extractor/build.gradle.kts

@@ -0,0 +1,21 @@
+plugins {
+    id("com.android.library")
+    kotlin("android")
+}
+
+android {
+    compileSdk = AndroidConfig.compileSdk
+    namespace = "eu.kanade.tachiyomi.lib.upstreamextractor"
+
+    defaultConfig {
+        minSdk = AndroidConfig.minSdk
+    }
+}
+
+dependencies {
+    compileOnly(libs.bundles.common)
+    implementation(project(":lib-playlist-utils"))
+    implementation("dev.datlag.jsunpacker:jsunpacker:1.0.1") {
+        exclude(group = "org.jetbrains.kotlin", module = "kotlin-stdlib-jdk8")
+    }
+}

lib/upstream-extractor/src/main/java/eu/kanade/tachiyomi/lib/upstreamextractor/UpstreamExtractor.kt

@@ -0,0 +1,19 @@
+package eu.kanade.tachiyomi.lib.upstreamextractor
+
+import dev.datlag.jsunpacker.JsUnpacker
+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 okhttp3.Headers
+import okhttp3.OkHttpClient
+import okhttp3.internal.commonEmptyHeaders
+
+class UpstreamExtractor(private val client: OkHttpClient) {
+    fun videosFromUrl(url: String, prefix: String = ""): List<Video> =
+        runCatching {
+            val jsE = client.newCall(GET(url)).execute().asJsoup().selectFirst("script:containsData(eval)")!!.data()
+            val masterUrl = JsUnpacker.unpackAndCombine(jsE)!!.substringAfter("{file:\"").substringBefore("\"}")
+            PlaylistUtils(client).extractFromHls(masterUrl, videoNameGen = { "${prefix}Upstream - $it" } )
+        }.getOrDefault(emptyList())
+}