Update master with backend overhaul branch (#2829)

* Beginnings of integration with Wikipedia client library. (#2642)

* Remove remaining unnecessary API version check.

* Roll up sleeves.

* Add and integrate the beginnings of app adapter.

* Remove vestigial event logging logic.

Event logging is no longer used in this app.

* Beginnings: remove StringUtils and associated redundancies.

* Remove redundant capitalize() method.

* Remove redundant urlEncode() method.

* Remove redundant (and incomplete) language lists.

* Remove redundant usages of SimpleDateFormat.

* Remove redundant json type adapter.

* Remove redundant MW error model classes.

* Rip out redundant MW model classes.

* Pass SessionManager into AppAdapter instead of injecting.

* Wire up more of the AppAdapter.

* Remove redundant Gson initialization and type adapters.

* Rip out PageTitle.

This was being used in some slightly incorrect/unexpected ways.

* Don't need static WikiSite.

* Bump data client library version

* Bump library version and fix build

* Fix tests

* Fix build

* Fix media of the day

* With fixes in recently modified APIs

app/src/main/java/fr/free/nrw/commons/CommonsAppAdapter.java

@@ -0,0 +1,84 @@
+package fr.free.nrw.commons;
+
+import org.wikipedia.AppAdapter;
+import org.wikipedia.dataclient.SharedPreferenceCookieManager;
+import org.wikipedia.dataclient.WikiSite;
+import org.wikipedia.json.GsonMarshaller;
+import org.wikipedia.json.GsonUnmarshaller;
+import org.wikipedia.login.LoginResult;
+
+import androidx.annotation.NonNull;
+import fr.free.nrw.commons.auth.SessionManager;
+import fr.free.nrw.commons.kvstore.JsonKvStore;
+import okhttp3.OkHttpClient;
+
+public class CommonsAppAdapter extends AppAdapter {
+    private final int DEFAULT_THUMB_SIZE = 640;
+    private final String COOKIE_STORE_NAME = "cookie_store";
+
+    private final SessionManager sessionManager;
+    private final JsonKvStore preferences;
+
+    CommonsAppAdapter(@NonNull SessionManager sessionManager, @NonNull JsonKvStore preferences) {
+        this.sessionManager = sessionManager;
+        this.preferences = preferences;
+    }
+
+    @Override
+    public String getMediaWikiBaseUrl() {
+        return BuildConfig.COMMONS_URL;
+    }
+
+    @Override
+    public String getRestbaseUriFormat() {
+        return BuildConfig.COMMONS_URL;
+    }
+
+    @Override
+    public OkHttpClient getOkHttpClient(@NonNull WikiSite wikiSite) {
+        return OkHttpConnectionFactory.getClient();
+    }
+
+    @Override
+    public int getDesiredLeadImageDp() {
+        return DEFAULT_THUMB_SIZE;
+    }
+
+    @Override
+    public boolean isLoggedIn() {
+        return sessionManager.isUserLoggedIn();
+    }
+
+    @Override
+    public String getUserName() {
+        return sessionManager.getUserName();
+    }
+
+    @Override
+    public String getPassword() {
+        return sessionManager.getPassword();
+    }
+
+    @Override
+    public void updateAccount(@NonNull LoginResult result) {
+        // TODO:  sessionManager.updateAccount(result);
+    }
+
+    @Override
+    public SharedPreferenceCookieManager getCookies() {
+        if (!preferences.contains(COOKIE_STORE_NAME)) {
+            return null;
+        }
+        return GsonUnmarshaller.unmarshal(SharedPreferenceCookieManager.class, preferences.getString(COOKIE_STORE_NAME, null));
+    }
+
+    @Override
+    public void setCookies(@NonNull SharedPreferenceCookieManager cookies) {
+        preferences.putString(COOKIE_STORE_NAME, GsonMarshaller.marshal(cookies));
+    }
+
+    @Override
+    public boolean logErrorsInsteadOfCrashing() {
+        return false;
+    }
+}