added function to add users to lists

app/src/main/java/org/nuclearfog/twidda/activity/ListDetail.java

@@ -1,10 +1,14 @@
 package org.nuclearfog.twidda.activity;
 
 import android.os.Bundle;
+import android.view.Menu;
+import android.view.MenuItem;
 import android.view.View;
 
 import androidx.annotation.Nullable;
 import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.SearchView;
+import androidx.appcompat.widget.SearchView.OnQueryTextListener;
 import androidx.appcompat.widget.Toolbar;
 import androidx.viewpager.widget.ViewPager;
 
@@ -14,18 +18,26 @@ import com.google.android.material.tabs.TabLayout.Tab;
 
 import org.nuclearfog.twidda.R;
 import org.nuclearfog.twidda.adapter.FragmentAdapter;
+import org.nuclearfog.twidda.backend.UserListManager;
+import org.nuclearfog.twidda.backend.UserListManager.ListManagerCallback;
+import org.nuclearfog.twidda.backend.engine.EngineException;
 import org.nuclearfog.twidda.backend.utils.FontTool;
 import org.nuclearfog.twidda.database.GlobalSettings;
 
+import static android.os.AsyncTask.Status.RUNNING;
+import static org.nuclearfog.twidda.backend.UserListManager.Action.ADD_USER;
+
 /**
  * Activity to show an user list, members and tweets
  */
-public class ListDetail extends AppCompatActivity implements OnTabSelectedListener {
+public class ListDetail extends AppCompatActivity implements OnTabSelectedListener, OnQueryTextListener, ListManagerCallback {
 
     public static final String KEY_LISTDETAIL_ID = "list-id";
     public static final String KEY_LISTDETAIL_TITLE = "list-title";
     public static final String KEY_LISTDETAIL_DESCR = "list-descr";
 
+    private UserListManager listAsync;
+
     private FragmentAdapter adapter;
     private TabLayout tablayout;
     private ViewPager pager;
@@ -69,6 +81,17 @@ public class ListDetail extends AppCompatActivity implements OnTabSelectedListen
     }
 
 
+    @Override
+    public boolean onCreateOptionsMenu(Menu m) {
+        getMenuInflater().inflate(R.menu.userlist, m);
+        MenuItem search = m.findItem(R.id.add_user);
+        SearchView addUser = (SearchView) search.getActionView();
+        addUser.setQueryHint(getString(R.string.list_add_user));
+        addUser.setOnQueryTextListener(this);
+        return super.onCreateOptionsMenu(m);
+    }
+
+
     @Override
     public void onBackPressed() {
         if (tablayout.getSelectedTabPosition() > 0) {
@@ -93,4 +116,35 @@ public class ListDetail extends AppCompatActivity implements OnTabSelectedListen
     @Override
     public void onTabReselected(Tab tab) {
     }
+
+
+    @Override
+    public boolean onQueryTextSubmit(String query) {
+        if (listAsync == null || listAsync.getStatus() != RUNNING) {
+            Bundle param = getIntent().getExtras();
+            if (param != null && param.containsKey(KEY_LISTDETAIL_ID)) {
+                long id = param.getLong(KEY_LISTDETAIL_ID);
+                listAsync = new UserListManager(id, ADD_USER, getApplicationContext(), this);
+                listAsync.execute(query);
+            }
+        }
+        return true;
+    }
+
+
+    @Override
+    public boolean onQueryTextChange(String newText) {
+        return false;
+    }
+
+
+    @Override
+    public void onSuccess() {
+    }
+
+
+    @Override
+    public void onFailure(EngineException err) {
+
+    }
 }

app/src/main/java/org/nuclearfog/twidda/backend/UserListManager.java

@@ -0,0 +1,72 @@
+package org.nuclearfog.twidda.backend;
+
+import android.content.Context;
+import android.os.AsyncTask;
+
+import org.nuclearfog.twidda.backend.engine.EngineException;
+import org.nuclearfog.twidda.backend.engine.TwitterEngine;
+
+import java.lang.ref.WeakReference;
+
+public class UserListManager extends AsyncTask<String, Void, Boolean> {
+
+    public enum Action {
+        ADD_USER,
+        DEL_USER
+    }
+
+    private final TwitterEngine mTwitter;
+    private final WeakReference<ListManagerCallback> callback;
+
+    private final long listId;
+    private final Action mode;
+    private EngineException err;
+
+
+    public UserListManager(long listId, Action mode, Context c, ListManagerCallback callback) {
+        super();
+        this.listId = listId;
+        this.mode = mode;
+        mTwitter = TwitterEngine.getInstance(c);
+        this.callback = new WeakReference<>(callback);
+    }
+
+    @Override
+    protected Boolean doInBackground(String... strings) {
+        try {
+            switch (mode) {
+                case ADD_USER:
+                    mTwitter.addUserToList(listId, strings);
+                    break;
+
+                case DEL_USER:
+                    mTwitter.delUserFromList(listId, strings[0]);
+                    break;
+            }
+
+        } catch (EngineException err) {
+            this.err = err;
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    protected void onPostExecute(Boolean success) {
+        if (callback.get() != null) {
+            if (success) {
+                callback.get().onSuccess();
+            } else {
+                callback.get().onFailure(err);
+            }
+        }
+    }
+
+
+    public interface ListManagerCallback {
+
+        void onSuccess();
+
+        void onFailure(EngineException err);
+    }
+}

app/src/main/java/org/nuclearfog/twidda/backend/engine/TwitterEngine.java

@@ -1077,6 +1077,36 @@ public class TwitterEngine {
         }
     }
 
+    /**
+     * adds user  to an user list
+     *
+     * @param listId    I of the list
+     * @param usernames screen names of the users
+     * @throws EngineException if access is unavailable
+     */
+    public void addUserToList(long listId, String[] usernames) throws EngineException {
+        try {
+            twitter.createUserListMembers(listId, usernames);
+        } catch (TwitterException err) {
+            throw new EngineException(err);
+        }
+    }
+
+    /**
+     * removes an user from user list
+     *
+     * @param listId   I of the list
+     * @param username screen names of an user
+     * @throws EngineException if access is unavailable
+     */
+    public void delUserFromList(long listId, String username) throws EngineException {
+        try {
+            twitter.destroyUserListMember(listId, username);
+        } catch (TwitterException err) {
+            throw new EngineException(err);
+        }
+    }
+
     /**
      * convert #twitter4j.User to TwitterUser List
      *

app/src/main/res/menu/userlist.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <item
+        android:id="@+id/add_user"
+        android:title="@string/list_add_user"
+        android:iconifiedByDefault="false"
+        app:actionViewClass="androidx.appcompat.widget.SearchView"
+        app:showAsAction="always" />
+</menu>

app/src/main/res/values-de-rDE/strings.xml

@@ -163,4 +163,5 @@
     <string name="userlist_error_empty_text">Title und Beschreibung dürfen nicht leer sein!</string>
     <string name="info_list_updated">Liste wurde aktualisiert</string>
     <string name="info_list_created">Liste wurde erstellt</string>
+    <string name="list_add_user">Nutzer hinzufügen</string>
 </resources>

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

@@ -169,4 +169,5 @@
     <string name="userlist_error_empty_text">Title and description must be set!</string>
     <string name="info_list_updated">Userlist updated</string>
     <string name="info_list_created">Userlist created</string>
+    <string name="list_add_user">add user to list</string>
 </resources>