TubeLab-App-Android/app/src/main/java/app/fedilab/fedilabtube/LoginActivity.java

package app.fedilab.fedilabtube;

import android.content.Intent;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.style.ForegroundColorSpan;
import android.text.style.UnderlineSpan;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;
import androidx.core.content.ContextCompat;

import org.json.JSONException;
import org.json.JSONObject;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.Arrays;
import java.util.HashMap;

import app.fedilab.fedilabtube.asynctasks.UpdateAccountInfoAsyncTask;
import app.fedilab.fedilabtube.client.HttpsConnection;
import app.fedilab.fedilabtube.helper.Helper;
import es.dmoral.toasty.Toasty;


public class LoginActivity extends AppCompatActivity {


    private static String client_id;
    private static String client_secret;
    private EditText login_uid;
    private EditText login_passwd;
    private Button connectionButton;
    private String actionToken;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);


        setContentView(R.layout.activity_login);
        if (getSupportActionBar() != null)
            getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        TextView create_an_account_peertube = findViewById(R.id.create_an_account_peertube);


        SpannableString content_create = new SpannableString(getString(R.string.join_peertube));
        content_create.setSpan(new UnderlineSpan(), 0, content_create.length(), 0);
        content_create.setSpan(new ForegroundColorSpan(ContextCompat.getColor(LoginActivity.this, R.color.colorAccent)), 0, content_create.length(),
                Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
        create_an_account_peertube.setText(content_create);

        create_an_account_peertube.setOnClickListener(v -> {
            Intent mainActivity = new Intent(LoginActivity.this, PeertubeRegisterActivity.class);
            Bundle b = new Bundle();
            mainActivity.putExtras(b);
            startActivity(mainActivity);
        });


        login_uid = findViewById(R.id.login_uid);
        login_passwd = findViewById(R.id.login_passwd);
        connectionButton = findViewById(R.id.login_button);


        connectionButton.setOnClickListener(v -> {

            if (!android.util.Patterns.EMAIL_ADDRESS.matcher(login_uid.getText().toString().trim()).matches()) {
                Toasty.error(LoginActivity.this, getString(R.string.email_error)).show();
                return;
            }
            String[] emailArray = login_uid.getText().toString().split("@");
            if (emailArray.length > 1 && !Arrays.asList(Helper.valideEmails).contains(emailArray[1])) {
                Toasty.error(LoginActivity.this, getString(R.string.email_error_domain, emailArray[1])).show();
                return;
            }
            String host = emailArray[1];
            String instance = Helper.getPeertubeUrl(host);
            final HashMap<String, String> parameters = new HashMap<>();
            connectionButton.setEnabled(false);

            try {
                instance = URLEncoder.encode(instance, "utf-8");
            } catch (UnsupportedEncodingException e) {
                Toasty.error(LoginActivity.this, getString(R.string.client_error), Toast.LENGTH_LONG).show();
            }
            actionToken = "/api/v1/oauth-clients/local";
            parameters.clear();
            parameters.put(Helper.CLIENT_NAME, Helper.CLIENT_NAME_VALUE);
            parameters.put(Helper.REDIRECT_URIS, Helper.REDIRECT_CONTENT);
            parameters.put(Helper.SCOPES, Helper.OAUTH_SCOPES_PEERTUBE);
            parameters.put(Helper.WEBSITE, Helper.WEBSITE_VALUE);
            String finalInstance = instance;
            new Thread(() -> {
                try {
                    String response = new HttpsConnection(LoginActivity.this).get("https://" + finalInstance + actionToken, 30, parameters, null);
                    JSONObject resobj;
                    try {
                        resobj = new JSONObject(response);
                        client_id = resobj.get(Helper.CLIENT_ID).toString();
                        client_secret = resobj.get(Helper.CLIENT_SECRET).toString();
                        SharedPreferences sharedpreferences = getSharedPreferences(Helper.APP_PREFS, MODE_PRIVATE);
                        SharedPreferences.Editor editor = sharedpreferences.edit();
                        editor.putString(Helper.CLIENT_ID, client_id);
                        editor.putString(Helper.CLIENT_SECRET, client_secret);
                        editor.apply();
                        parameters.clear();
                        parameters.put(Helper.CLIENT_ID, sharedpreferences.getString(Helper.CLIENT_ID, null));
                        parameters.put(Helper.CLIENT_SECRET, sharedpreferences.getString(Helper.CLIENT_SECRET, null));
                        parameters.put("grant_type", "password");
                        try {
                            parameters.put("username", URLEncoder.encode(login_uid.getText().toString().trim().toLowerCase(), "UTF-8"));
                        } catch (UnsupportedEncodingException e) {
                            parameters.put("username", login_uid.getText().toString().trim().toLowerCase());
                        }
                        try {
                            parameters.put("password", URLEncoder.encode(login_passwd.getText().toString(), "UTF-8"));
                        } catch (UnsupportedEncodingException e) {
                            parameters.put("password", login_passwd.getText().toString());
                        }
                        parameters.put("scope", "user");
                        String oauthUrl = "/api/v1/users/token";
                        try {
                            String responseLogin = new HttpsConnection(LoginActivity.this).post("https://" + finalInstance + oauthUrl, 30, parameters, null);
                            runOnUiThread(() -> {
                                JSONObject resobjLogin;
                                try {
                                    resobjLogin = new JSONObject(responseLogin);
                                    String token = resobjLogin.get("access_token").toString();
                                    String refresh_token = null;
                                    if (resobjLogin.has("refresh_token"))
                                        refresh_token = resobjLogin.getString("refresh_token");
                                    editor.putString(Helper.PREF_KEY_OAUTH_TOKEN, token);
                                    editor.apply();
                                    //Update the account with the token;
                                    new UpdateAccountInfoAsyncTask(LoginActivity.this, token, client_id, client_secret, refresh_token, host).executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
                                } catch (JSONException e) {
                                    e.printStackTrace();
                                    runOnUiThread(() -> connectionButton.setEnabled(true));
                                }
                            });
                        } catch (final Exception e) {
                            e.printStackTrace();
                            runOnUiThread(() -> {
                                connectionButton.setEnabled(true);
                                String message;
                                if (e.getLocalizedMessage() != null && e.getLocalizedMessage().trim().length() > 0)
                                    message = e.getLocalizedMessage();
                                else if (e.getMessage() != null && e.getMessage().trim().length() > 0)
                                    message = e.getMessage();
                                else
                                    message = getString(R.string.client_error);
                                Toasty.error(LoginActivity.this, message, Toast.LENGTH_LONG).show();
                            });
                        }

                    } catch (JSONException e) {
                        e.printStackTrace();
                        e.printStackTrace();
                        runOnUiThread(() -> connectionButton.setEnabled(true));
                    }
                } catch (final Exception e) {
                    e.printStackTrace();
                    runOnUiThread(() -> {
                        connectionButton.setEnabled(true);
                        String message = null;
                        if (e.getLocalizedMessage() != null) {
                            message = e.getMessage();
                        }
                        if (message == null) {
                            message = getString(R.string.client_error);
                        }
                        Toasty.error(LoginActivity.this, message, Toast.LENGTH_LONG).show();
                    });
                }
            }).start();
        });
    }

    @Override
    protected void onResume() {
        super.onResume();
    }


    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getItemId() == android.R.id.home) {
            finish();
            return true;
        }
        return super.onOptionsItemSelected(item);
    }


}