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

lib/streamhidevid-extractor/build.gradle.kts

@@ -0,0 +1,20 @@
+plugins {
+    id("com.android.library")
+    kotlin("android")
+}
+
+android {
+    compileSdk = AndroidConfig.compileSdk
+    namespace = "eu.kanade.tachiyomi.lib.streamhidevidextractor"
+
+    defaultConfig {
+        minSdk = AndroidConfig.minSdk
+    }
+}
+
+dependencies {
+    compileOnly(libs.bundles.common)
+    implementation("dev.datlag.jsunpacker:jsunpacker:1.0.1") {
+        exclude(group = "org.jetbrains.kotlin", module = "kotlin-stdlib-jdk8")
+    }
+}

lib/streamhidevid-extractor/src/main/java/eu/kanade/tachiyomi/lib/streamhidevidextractor/StreamHideVidExtractor.kt

@@ -0,0 +1,36 @@
+package eu.kanade.tachiyomi.lib.streamhidevidextractor
+
+import dev.datlag.jsunpacker.JsUnpacker
+import eu.kanade.tachiyomi.animesource.model.Track
+import eu.kanade.tachiyomi.animesource.model.Video
+import eu.kanade.tachiyomi.network.GET
+import okhttp3.OkHttpClient
+
+class StreamHideVidExtractor(private val client: OkHttpClient) {
+    // from nineanime / ask4movie FilemoonExtractor
+    private val subtitleRegex = Regex("""#EXT-X-MEDIA:TYPE=SUBTITLES.*?NAME="(.*?)".*?URI="(.*?)"""")
+
+    fun videosFromUrl(url: String, prefix: String = ""): List<Video> {
+        val page = client.newCall(GET(url)).execute().body.string()
+        val unpacked = JsUnpacker.unpackAndCombine(page) ?: return emptyList()
+        val playlistUrl = unpacked.substringAfter("sources:")
+            .substringAfter("file:\"") // StreamHide
+            .substringAfter("src:\"") // StreamVid
+            .substringBefore('"')
+
+        val playlistData = client.newCall(GET(playlistUrl)).execute().body.string()
+
+        val subs = subtitleRegex.findAll(playlistData).map {
+            val urlPart = it.groupValues[2]
+            val subUrl = when {
+                !urlPart.startsWith("https:") ->
+                    playlistUrl.substringBeforeLast("/") + "/$urlPart"
+                else -> urlPart
+            }
+            Track(subUrl, it.groupValues[1])
+        }.toList()
+
+        // The playlist usually only have one video quality.
+        return listOf(Video(playlistUrl, "${prefix}StreamHideVid", playlistUrl, subtitleTracks = subs))
+    }
+}