add support for Extensions Lib 1.4 (#496)

* Support extensions lib 1.4

* Fix build

* Support UpdateStrategy

* Update extension lib min/max to match Tachiyomi

* Use HttpSource.getMangaUrl and add Chapter.realUrl

server/src/main/kotlin/eu/kanade/tachiyomi/AppModule.kt

@@ -16,6 +16,7 @@ package eu.kanade.tachiyomi
 // import eu.kanade.tachiyomi.data.track.TrackManager
 // import eu.kanade.tachiyomi.extension.ExtensionManager
 import android.app.Application
+import eu.kanade.tachiyomi.network.JavaScriptEngine
 import eu.kanade.tachiyomi.network.NetworkHelper
 import kotlinx.serialization.json.Json
 import rx.Observable
@@ -41,6 +42,8 @@ class AppModule(val app: Application) : InjektModule {
 
         addSingletonFactory { NetworkHelper(app) }
 
+        addSingletonFactory { JavaScriptEngine(app) }
+
 //        addSingletonFactory { SourceManager(app).also { get<ExtensionManager>().init(it) } }
 //
 //        addSingletonFactory { ExtensionManager(app) }

server/src/main/kotlin/eu/kanade/tachiyomi/network/JavaScriptEngine.kt

@@ -0,0 +1,27 @@
+package eu.kanade.tachiyomi.network
+
+import android.content.Context
+import app.cash.quickjs.QuickJs
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+
+/**
+ * Util for evaluating JavaScript in sources.
+ */
+class JavaScriptEngine(context: Context) {
+
+    /**
+     * Evaluate arbitrary JavaScript code and get the result as a primitive type
+     * (e.g., String, Int).
+     *
+     * @since extensions-lib 1.4
+     * @param script JavaScript to execute.
+     * @return Result of JavaScript code as a primitive type.
+     */
+    @Suppress("UNUSED", "UNCHECKED_CAST")
+    suspend fun <T> evaluate(script: String): T = withContext(Dispatchers.IO) {
+        QuickJs.create().use {
+            it.evaluate(script) as T
+        }
+    }
+}

server/src/main/kotlin/eu/kanade/tachiyomi/network/Requests.kt

@@ -3,6 +3,7 @@ package eu.kanade.tachiyomi.network
 import okhttp3.CacheControl
 import okhttp3.FormBody
 import okhttp3.Headers
+import okhttp3.HttpUrl
 import okhttp3.Request
 import okhttp3.RequestBody
 import java.util.concurrent.TimeUnit.MINUTES
@@ -23,6 +24,21 @@ fun GET(
         .build()
 }
 
+/**
+ * @since extensions-lib 1.4
+ */
+fun GET(
+    url: HttpUrl,
+    headers: Headers = DEFAULT_HEADERS,
+    cache: CacheControl = DEFAULT_CACHE_CONTROL
+): Request {
+    return Request.Builder()
+        .url(url)
+        .headers(headers)
+        .cacheControl(cache)
+        .build()
+}
+
 fun POST(
     url: String,
     headers: Headers = DEFAULT_HEADERS,

server/src/main/kotlin/eu/kanade/tachiyomi/source/model/SManga.kt

@@ -20,6 +20,8 @@ interface SManga : Serializable {
 
     var thumbnail_url: String?
 
+    var update_strategy: UpdateStrategy
+
     var initialized: Boolean
 
     fun copyFrom(other: SManga) {

server/src/main/kotlin/eu/kanade/tachiyomi/source/model/SMangaImpl.kt

@@ -18,5 +18,7 @@ class SMangaImpl : SManga {
 
     override var thumbnail_url: String? = null
 
+    override var update_strategy: UpdateStrategy = UpdateStrategy.ALWAYS_UPDATE
+
     override var initialized: Boolean = false
 }

server/src/main/kotlin/eu/kanade/tachiyomi/source/model/UpdateStrategy.kt

@@ -0,0 +1,6 @@
+package eu.kanade.tachiyomi.source.model
+
+enum class UpdateStrategy {
+    ALWAYS_UPDATE,
+    ONLY_FETCH_ONCE
+}

server/src/main/kotlin/eu/kanade/tachiyomi/source/online/HttpSource.kt

@@ -357,6 +357,28 @@ abstract class HttpSource : CatalogueSource {
         }
     }
 
+    /**
+     * Returns the url of the provided manga
+     *
+     * @since extensions-lib 1.4
+     * @param manga the manga
+     * @return url of the manga
+     */
+    open fun getMangaUrl(manga: SManga): String {
+        return mangaDetailsRequest(manga).url.toString()
+    }
+
+    /**
+     * Returns the url of the provided chapter
+     *
+     * @since extensions-lib 1.4
+     * @param chapter the chapter
+     * @return url of the chapter
+     */
+    open fun getChapterUrl(chapter: SChapter): String {
+        return pageListRequest(chapter).url.toString()
+    }
+
     /**
      * Called before inserting a new chapter into database. Use it if you need to override chapter
      * fields, like the title or the chapter number. Do not change anything to [manga].
@@ -364,8 +386,7 @@ abstract class HttpSource : CatalogueSource {
      * @param chapter the chapter to be added.
      * @param manga the manga of the chapter.
      */
-    open fun prepareNewChapter(chapter: SChapter, manga: SManga) {
-    }
+    open fun prepareNewChapter(chapter: SChapter, manga: SManga) {}
 
     /**
      * Returns the list of filters for the source.