Save and restore cookies to/from preferences

So that the user does not have to solve a recaptcha every time he opens the app

app/src/debug/java/org/schabi/newpipe/DebugApp.java

@@ -40,8 +40,10 @@ public class DebugApp extends App {
 
     @Override
     protected Downloader getDownloader() {
-        return DownloaderImpl.init(new OkHttpClient.Builder()
+        DownloaderImpl downloader = DownloaderImpl.init(new OkHttpClient.Builder()
                 .addNetworkInterceptor(new StethoInterceptor()));
+        setCookiesToDownloader(downloader);
+        return downloader;
     }
 
     private void initStetho() {

app/src/main/java/org/schabi/newpipe/App.java

@@ -5,10 +5,12 @@ import android.app.Application;
 import android.app.NotificationChannel;
 import android.app.NotificationManager;
 import android.content.Context;
+import android.content.SharedPreferences;
 import android.os.Build;
 import android.util.Log;
 
 import androidx.annotation.Nullable;
+import androidx.preference.PreferenceManager;
 
 import com.nostra13.universalimageloader.cache.memory.impl.LRULimitedMemoryCache;
 import com.nostra13.universalimageloader.core.ImageLoader;
@@ -125,7 +127,16 @@ public class App extends Application {
     }
 
     protected Downloader getDownloader() {
-        return DownloaderImpl.init(null);
+        DownloaderImpl downloader = DownloaderImpl.init(null);
+        setCookiesToDownloader(downloader);
+        return downloader;
+    }
+
+    protected void setCookiesToDownloader(final DownloaderImpl downloader) {
+        final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(
+                getApplicationContext());
+        final String key = getApplicationContext().getString(R.string.recaptcha_cookies_key);
+        downloader.setCookies(prefs.getString(key, ""));
     }
 
     private void configureRxJavaErrorHandler() {

app/src/main/java/org/schabi/newpipe/ReCaptchaActivity.java

@@ -1,6 +1,7 @@
 package org.schabi.newpipe;
 
 import android.content.Intent;
+import android.content.SharedPreferences;
 import android.os.Build;
 import android.os.Bundle;
 import android.util.Log;
@@ -19,6 +20,7 @@ import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.widget.Toolbar;
 import androidx.core.app.NavUtils;
+import androidx.preference.PreferenceManager;
 
 import org.schabi.newpipe.util.ThemeHelper;
 
@@ -159,6 +161,12 @@ public class ReCaptchaActivity extends AppCompatActivity {
         }
 
         if (!foundCookies.isEmpty()) {
+            // save cookies to preferences
+            final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(
+                    getApplicationContext());
+            final String key = getApplicationContext().getString(R.string.recaptcha_cookies_key);
+            prefs.edit().putString(key, foundCookies).apply();
+
             // give cookies to Downloader class
             DownloaderImpl.getInstance().setCookies(foundCookies);
             setResult(RESULT_OK);
@@ -170,7 +178,7 @@ public class ReCaptchaActivity extends AppCompatActivity {
     }
 
 
-    private void handleCookiesFromUrl(final @Nullable String url) {
+    private void handleCookiesFromUrl(@Nullable final String url) {
         if (MainActivity.DEBUG) {
             Log.d(TAG, "handleCookiesFromUrl: url=" + (url == null ? "null" : url));
         }
@@ -201,7 +209,7 @@ public class ReCaptchaActivity extends AppCompatActivity {
         }
     }
 
-    private void handleCookies(final @Nullable String cookies) {
+    private void handleCookies(@Nullable final String cookies) {
         if (MainActivity.DEBUG) {
             Log.d(TAG, "handleCookies: cookies=" + (cookies == null ? "null" : cookies));
         }
@@ -214,7 +222,7 @@ public class ReCaptchaActivity extends AppCompatActivity {
         // add here methods to extract cookies for other services
     }
 
-    private void addYoutubeCookies(final @NonNull String cookies) {
+    private void addYoutubeCookies(@NonNull final String cookies) {
         if (cookies.contains("s_gl=") || cookies.contains("goojf=")
                 || cookies.contains("VISITOR_INFO1_LIVE=")
                 || cookies.contains("GOOGLE_ABUSE_EXEMPTION=")) {

app/src/main/res/values/settings_keys.xml

@@ -1129,4 +1129,5 @@
         <item>@string/grid</item>
     </string-array>
 
+    <string name="recaptcha_cookies_key" translatable="false">recaptcha_cookies_key</string>
 </resources>