Address minor Kotlin compiler warnings

app/src/main/java/eu/kanade/tachiyomi/data/cache/CoverCache.kt

@@ -60,7 +60,7 @@ class CoverCache(private val context: Context) {
             return false
 
         // Remove file.
-        val file = getCoverFile(thumbnailUrl!!)
+        val file = getCoverFile(thumbnailUrl)
         return file.exists() && file.delete()
     }
 

app/src/main/java/eu/kanade/tachiyomi/data/preference/SharedPreferencesDataStore.kt

@@ -45,11 +45,11 @@ class SharedPreferencesDataStore(private val prefs: SharedPreferences) : Prefere
         prefs.edit().putString(key, value).apply()
     }
 
-    override fun getStringSet(key: String?, defValues: MutableSet<String>?): MutableSet<String> {
+    override fun getStringSet(key: String?, defValues: MutableSet<String>?): MutableSet<String>? {
         return prefs.getStringSet(key, defValues)
     }
 
     override fun putStringSet(key: String?, values: MutableSet<String>?) {
         prefs.edit().putStringSet(key, values).apply()
     }
-}
+}

app/src/main/java/eu/kanade/tachiyomi/data/track/kitsu/KitsuModels.kt

@@ -18,13 +18,12 @@ class KitsuSearchManga(obj: JsonObject) {
     private val synopsis by obj.byString
     private var startDate = obj.get("startDate").nullString?.let {
         val outputDf = SimpleDateFormat("yyyy-MM-dd", Locale.US)
-        outputDf.format(Date(it!!.toLong() * 1000))
+        outputDf.format(Date(it.toLong() * 1000))
     }
     private val endDate = obj.get("endDate").nullString
 
-
     @CallSuper
-    open fun toTrack() = TrackSearch.create(TrackManager.KITSU).apply {
+    fun toTrack() = TrackSearch.create(TrackManager.KITSU).apply {
         media_id = this@KitsuSearchManga.id
         title = canonicalTitle
         total_chapters = chapterCount ?: 0
@@ -55,7 +54,7 @@ class KitsuLibManga(obj: JsonObject, manga: JsonObject) {
     private val ratingTwenty = obj["attributes"].obj.get("ratingTwenty").nullString
     val progress by obj["attributes"].byInt
 
-    open fun toTrack() = TrackSearch.create(TrackManager.KITSU).apply {
+    fun toTrack() = TrackSearch.create(TrackManager.KITSU).apply {
         media_id = libraryId
         title = canonicalTitle
         total_chapters = chapterCount ?: 0

app/src/main/java/eu/kanade/tachiyomi/extension/util/ExtensionInstallActivity.kt

@@ -39,7 +39,7 @@ class ExtensionInstallActivity : Activity() {
     }
 
     private fun checkInstallationResult(resultCode: Int) {
-        val downloadId = intent.extras.getLong(ExtensionInstaller.EXTRA_DOWNLOAD_ID)
+        val downloadId = intent.extras!!.getLong(ExtensionInstaller.EXTRA_DOWNLOAD_ID)
         val success = resultCode == RESULT_OK
 
         val extensionManager = Injekt.get<ExtensionManager>()

app/src/main/java/eu/kanade/tachiyomi/extension/util/ExtensionLoader.kt

@@ -121,7 +121,7 @@ internal object ExtensionLoader {
 
         val classLoader = PathClassLoader(appInfo.sourceDir, null, context.classLoader)
 
-        val sources = appInfo.metaData.getString(METADATA_SOURCE_CLASS)
+        val sources = appInfo.metaData.getString(METADATA_SOURCE_CLASS)!!
                 .split(";")
                 .map {
                     val sourceClass = it.trim()

app/src/main/java/eu/kanade/tachiyomi/ui/catalogue/SourceDividerItemDecoration.kt

@@ -13,7 +13,7 @@ class SourceDividerItemDecoration(context: Context) : RecyclerView.ItemDecoratio
 
     init {
         val a = context.obtainStyledAttributes(intArrayOf(android.R.attr.listDivider))
-        divider = a.getDrawable(0)
+        divider = a.getDrawable(0)!!
         a.recycle()
     }
 

app/src/main/java/eu/kanade/tachiyomi/ui/catalogue/browse/CatalogueNavigationView.kt

@@ -28,7 +28,7 @@ class CatalogueNavigationView @JvmOverloads constructor(context: Context, attrs:
         val view = inflate(R.layout.catalogue_drawer_content)
         ((view as ViewGroup).getChildAt(1) as ViewGroup).addView(recycler)
         addView(view)
-        title.text = context?.getString(R.string.source_search_options)
+        title.text = context.getString(R.string.source_search_options)
         search_btn.setOnClickListener { onSearchClicked() }
         reset_btn.setOnClickListener { onResetClicked() }
     }
@@ -37,4 +37,4 @@ class CatalogueNavigationView @JvmOverloads constructor(context: Context, attrs:
         adapter.updateDataSet(items)
     }
 
-}
+}

app/src/main/java/eu/kanade/tachiyomi/ui/catalogue/global_search/CatalogueSearchAdapter.kt

@@ -38,7 +38,7 @@ class CatalogueSearchAdapter(val controller: CatalogueSearchController) :
 
     override fun onRestoreInstanceState(savedInstanceState: Bundle) {
         super.onRestoreInstanceState(savedInstanceState)
-        bundle = savedInstanceState.getBundle(HOLDER_BUNDLE_KEY)
+        bundle = savedInstanceState.getBundle(HOLDER_BUNDLE_KEY)!!
     }
 
     /**

app/src/main/java/eu/kanade/tachiyomi/ui/extension/ExtensionDetailsController.kt

@@ -47,7 +47,7 @@ class ExtensionDetailsController(bundle: Bundle? = null) :
     }
 
     override fun createPresenter(): ExtensionDetailsPresenter {
-        return ExtensionDetailsPresenter(args.getString(PKGNAME_KEY))
+        return ExtensionDetailsPresenter(args.getString(PKGNAME_KEY)!!)
     }
 
     override fun getTitle(): String? {
@@ -119,7 +119,7 @@ class ExtensionDetailsController(bundle: Bundle? = null) :
     private fun addPreferencesForSource(screen: PreferenceScreen, source: Source, multiSource: Boolean) {
         val context = screen.context
 
-        // TODO 
+        // TODO
         val dataStore = SharedPreferencesDataStore(/*if (source is HttpSource) {
             source.preferences
         } else {*/

app/src/main/java/eu/kanade/tachiyomi/ui/extension/ExtensionDividerItemDecoration.kt

@@ -13,7 +13,7 @@ class ExtensionDividerItemDecoration(context: Context) : RecyclerView.ItemDecora
 
     init {
         val a = context.obtainStyledAttributes(intArrayOf(android.R.attr.listDivider))
-        divider = a.getDrawable(0)
+        divider = a.getDrawable(0)!!
         a.recycle()
     }
 

app/src/main/java/eu/kanade/tachiyomi/ui/extension/ExtensionTrustDialog.kt

@@ -24,10 +24,10 @@ class ExtensionTrustDialog<T>(bundle: Bundle? = null) : DialogController(bundle)
                 .positiveText(R.string.ext_trust)
                 .negativeText(R.string.ext_uninstall)
                 .onPositive { _, _ ->
-                    (targetController as? Listener)?.trustSignature(args.getString(SIGNATURE_KEY))
+                    (targetController as? Listener)?.trustSignature(args.getString(SIGNATURE_KEY)!!)
                 }
                 .onNegative { _, _ ->
-                    (targetController as? Listener)?.uninstallExtension(args.getString(PKGNAME_KEY))
+                    (targetController as? Listener)?.uninstallExtension(args.getString(PKGNAME_KEY)!!)
                 }
                 .build()
     }

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.kt

@@ -119,8 +119,8 @@ class ReaderActivity : BaseRxActivity<ReaderPresenter>() {
         setContentView(R.layout.reader_activity)
 
         if (presenter.needsInit()) {
-            val manga = intent.extras.getLong("manga", -1)
+            val manga = intent.extras!!.getLong("manga", -1)
-            val chapter = intent.extras.getLong("chapter", -1)
+            val chapter = intent.extras!!.getLong("chapter", -1)
 
             if (manga == -1L || chapter == -1L) {
                 finish()

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderPresenter.kt

@@ -498,7 +498,7 @@ class ReaderPresenter(
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribeFirst(
                         { view, file -> view.onShareImageResult(file) },
-                        { view, error -> /* Empty */ }
+                        { _, _ -> /* Empty */ }
                 )
     }
 

app/src/main/java/eu/kanade/tachiyomi/ui/reader/loader/DownloadPageLoader.kt

@@ -32,9 +32,9 @@ class DownloadPageLoader(
         return downloadManager.buildPageList(source, manga, chapter.chapter)
             .map { pages ->
                 pages.map { page ->
-                    ReaderPage(page.index, page.url, page.imageUrl, {
+                    ReaderPage(page.index, page.url, page.imageUrl) {
                         context.contentResolver.openInputStream(page.uri)
-                    }).apply {
+                    }.apply {
                         status = Page.READY
                     }
                 }

app/src/main/java/eu/kanade/tachiyomi/util/ChapterRecognition.kt

@@ -91,7 +91,7 @@ object ChapterRecognition {
      * @param chapter chapter object
      * @return true if volume is found
      */
-    fun updateChapter(match: MatchResult?, chapter: SChapter): Boolean {
+    private fun updateChapter(match: MatchResult?, chapter: SChapter): Boolean {
         match?.let {
             val initial = it.groups[1]?.value?.toFloat()!!
             val subChapterDecimal = it.groups[2]?.value
@@ -109,12 +109,12 @@ object ChapterRecognition {
      * @param alpha alpha value of regex
      * @return decimal/alpha float value
      */
-    fun checkForDecimal(decimal: String?, alpha: String?): Float {
+    private fun checkForDecimal(decimal: String?, alpha: String?): Float {
         if (!decimal.isNullOrEmpty())
-            return decimal?.toFloat()!!
+            return decimal.toFloat()
 
         if (!alpha.isNullOrEmpty()) {
-            if (alpha!!.contains("extra"))
+            if (alpha.contains("extra"))
                 return .99f
 
             if (alpha.contains("omake"))
@@ -138,7 +138,7 @@ object ChapterRecognition {
      * x.a -> x.1, x.b -> x.2, etc
      */
     private fun parseAlphaPostFix(alpha: Char): Float {
-        return ("0." + Integer.toString(alpha.toInt() - 96)).toFloat()
+        return ("0." + (alpha.toInt() - 96).toString()).toFloat()
     }
 
 }

app/src/main/java/eu/kanade/tachiyomi/util/ContextExtensions.kt

@@ -172,11 +172,11 @@ fun Context.isServiceRunning(serviceClass: Class<*>): Boolean {
  */
 fun Context.openInBrowser(url: String) {
     try {
-        val url = Uri.parse(url)
+        val parsedUrl = Uri.parse(url)
         val intent = CustomTabsIntent.Builder()
                 .setToolbarColor(getResourceColor(R.attr.colorPrimary))
                 .build()
-        intent.launchUrl(this, url)
+        intent.launchUrl(this, parsedUrl)
     } catch (e: Exception) {
         toast(e.message)
     }