Addons (#368)

* feat: (wip) torrent

credit to kuukiyomi

* fix: extensions -> addons

* fix: unified loader

* feat: (wip) modularity

* fix: addon ui

* feat: addon install/uninstall

---------

Co-authored-by: aayush262 <aayushthakur262006@gmail.com>

app/src/main/java/ani/dantotsu/addons/AddonManager.kt

@@ -0,0 +1,44 @@
+package ani.dantotsu.addons
+
+import android.content.Context
+import ani.dantotsu.media.AddonType
+import eu.kanade.tachiyomi.extension.InstallStep
+import eu.kanade.tachiyomi.extension.util.ExtensionInstaller
+import rx.Observable
+
+abstract class AddonManager<T: Addon.Installed>(
+    private val context: Context
+) {
+    abstract var extension: T?
+    abstract var name: String
+    abstract var type: AddonType
+    protected val installer by lazy { ExtensionInstaller(context) }
+    var hasUpdate: Boolean = false
+        protected set
+
+    protected var onListenerAction: ((AddonListener.ListenerAction) -> Unit)? = null
+
+    abstract suspend fun init()
+    abstract fun isAvailable(): Boolean
+    abstract fun getVersion(): String?
+    abstract fun getPackageName(): String?
+    abstract fun hadError(context: Context): String?
+    abstract fun updateInstallStep(id: Long, step: InstallStep)
+    abstract fun setInstalling(id: Long)
+
+    fun uninstall() {
+        getPackageName()?.let {
+            installer.uninstallApk(it)
+        }
+    }
+    fun addListenerAction(action: (AddonListener.ListenerAction) -> Unit) {
+        onListenerAction = action
+    }
+    fun removeListenerAction() {
+        onListenerAction = null
+    }
+
+    fun install(url: String): Observable<InstallStep> {
+        return installer.downloadAndInstall(url, getPackageName()?: "", name, type)
+    }
+}