]> git.ktnx.net Git - mobile-ledger.git/blobdiff - app/src/main/java/net/ktnx/mobileledger/ui/activity/MainActivity.java
more pronounced day/month delimiters in the transaction list
[mobile-ledger.git] / app / src / main / java / net / ktnx / mobileledger / ui / activity / MainActivity.java
index 90f88685c5a3696ef090aa578a375f110318af0f..e686d96fdb37233dd2a0ffcd372b6ebdf359ba96 100644 (file)
 /*
- * Copyright © 2019 Damyan Ivanov.
- * This file is part of Mobile-Ledger.
- * Mobile-Ledger is free software: you can distribute it and/or modify it
+ * Copyright © 2021 Damyan Ivanov.
+ * This file is part of MoLe.
+ * MoLe is free software: you can distribute it and/or modify it
  * under the term of the GNU General Public License as published by
  * the Free Software Foundation, either version 3 of the License, or
  * (at your opinion), any later version.
  *
- * Mobile-Ledger is distributed in the hope that it will be useful,
+ * MoLe is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  * GNU General Public License terms for details.
  *
  * You should have received a copy of the GNU General Public License
- * along with Mobile-Ledger. If not, see <https://www.gnu.org/licenses/>.
+ * along with MoLe. If not, see <https://www.gnu.org/licenses/>.
  */
 
 package net.ktnx.mobileledger.ui.activity;
 
+import android.content.Context;
 import android.content.Intent;
-import android.content.SharedPreferences;
 import android.content.pm.PackageInfo;
+import android.content.pm.ShortcutInfo;
+import android.content.pm.ShortcutManager;
+import android.content.res.ColorStateList;
+import android.graphics.Color;
+import android.graphics.drawable.Icon;
 import android.os.Build;
 import android.os.Bundle;
-import android.support.annotation.ColorInt;
-import android.support.v4.app.Fragment;
-import android.support.v4.app.FragmentManager;
-import android.support.v4.app.FragmentPagerAdapter;
-import android.support.v4.view.GravityCompat;
-import android.support.v4.view.ViewPager;
-import android.support.v4.widget.DrawerLayout;
-import android.support.v7.app.ActionBarDrawerToggle;
-import android.support.v7.app.AppCompatActivity;
-import android.support.v7.widget.Toolbar;
+import android.text.format.DateUtils;
 import android.util.Log;
 import android.view.View;
-import android.widget.LinearLayout;
-import android.widget.ProgressBar;
+import android.view.animation.AnimationUtils;
 import android.widget.TextView;
-import android.widget.Toast;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.ActionBarDrawerToggle;
+import androidx.appcompat.app.AlertDialog;
+import androidx.core.view.GravityCompat;
+import androidx.drawerlayout.widget.DrawerLayout;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.MutableLiveData;
+import androidx.lifecycle.ViewModelProvider;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+import androidx.viewpager2.adapter.FragmentStateAdapter;
+import androidx.viewpager2.widget.ViewPager2;
+
+import com.google.android.material.snackbar.Snackbar;
+
+import net.ktnx.mobileledger.BackupsActivity;
 import net.ktnx.mobileledger.R;
-import net.ktnx.mobileledger.async.RefreshDescriptionsTask;
 import net.ktnx.mobileledger.async.RetrieveTransactionsTask;
+import net.ktnx.mobileledger.async.TransactionAccumulator;
+import net.ktnx.mobileledger.databinding.ActivityMainBinding;
+import net.ktnx.mobileledger.db.DB;
+import net.ktnx.mobileledger.db.Option;
+import net.ktnx.mobileledger.db.Profile;
+import net.ktnx.mobileledger.db.TransactionWithAccounts;
 import net.ktnx.mobileledger.model.Data;
-import net.ktnx.mobileledger.model.LedgerAccount;
-import net.ktnx.mobileledger.model.MobileLedgerProfile;
-import net.ktnx.mobileledger.ui.MobileLedgerListFragment;
+import net.ktnx.mobileledger.model.LedgerTransaction;
+import net.ktnx.mobileledger.ui.FabManager;
+import net.ktnx.mobileledger.ui.MainModel;
 import net.ktnx.mobileledger.ui.account_summary.AccountSummaryFragment;
+import net.ktnx.mobileledger.ui.new_transaction.NewTransactionActivity;
+import net.ktnx.mobileledger.ui.profiles.ProfileDetailActivity;
+import net.ktnx.mobileledger.ui.profiles.ProfilesRecyclerViewAdapter;
+import net.ktnx.mobileledger.ui.templates.TemplatesActivity;
 import net.ktnx.mobileledger.ui.transaction_list.TransactionListFragment;
-import net.ktnx.mobileledger.utils.MLDB;
+import net.ktnx.mobileledger.utils.Colors;
+import net.ktnx.mobileledger.utils.Logger;
+import net.ktnx.mobileledger.utils.Misc;
 
-import java.lang.ref.WeakReference;
-import java.text.DateFormat;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.ArrayList;
 import java.util.Date;
+import java.util.List;
+import java.util.Locale;
+import java.util.Objects;
 
-public class MainActivity extends AppCompatActivity {
-    public MobileLedgerListFragment currentFragment = null;
-    DrawerLayout drawer;
-    private AccountSummaryFragment accountSummaryFragment;
-    private TransactionListFragment transactionListFragment;
-    private FragmentManager fragmentManager;
-    private TextView tvLastUpdate;
-    private RetrieveTransactionsTask retrieveTransactionsTask;
-    private View bTransactionListCancelDownload;
-    private ProgressBar progressBar;
-    private LinearLayout progressLayout;
+/*
+ * TODO: reports
+ *  */
+
+public class MainActivity extends ProfileThemedActivity implements FabManager.FabHandler {
+    public static final String TAG = "main-act";
+    public static final String STATE_CURRENT_PAGE = "current_page";
+    public static final String BUNDLE_SAVED_STATE = "bundle_savedState";
+    public static final String STATE_ACC_FILTER = "account_filter";
+    private static final boolean FAB_HIDDEN = false;
+    private static final boolean FAB_SHOWN = true;
+    private ConverterThread converterThread = null;
     private SectionsPagerAdapter mSectionsPagerAdapter;
-    private ViewPager mViewPager;
-
+    private ProfilesRecyclerViewAdapter mProfileListAdapter;
+    private int mCurrentPage;
+    private boolean mBackMeansToAccountList = false;
+    private DrawerLayout.SimpleDrawerListener drawerListener;
+    private ActionBarDrawerToggle barDrawerToggle;
+    private ViewPager2.OnPageChangeCallback pageChangeCallback;
+    private Profile profile;
+    private MainModel mainModel;
+    private ActivityMainBinding b;
+    private int fabVerticalOffset;
+    private FabManager fabManager;
     @Override
     protected void onStart() {
         super.onStart();
 
-        Data.lastUpdateDate.set(null);
-        updateLastUpdateTextFromDB();
-        Date lastUpdate = Data.lastUpdateDate.get();
+        Logger.debug(TAG, "onStart()");
 
-        long now = new Date().getTime();
-        if ((lastUpdate == null) || (now > (lastUpdate.getTime() + (24 * 3600 * 1000)))) {
-            if (lastUpdate == null) Log.d("db::", "WEB data never fetched. scheduling a fetch");
-            else Log.d("db",
-                    String.format("WEB data last fetched at %1.3f and now is %1.3f. re-fetching",
-                            lastUpdate.getTime() / 1000f, now / 1000f));
-
-            scheduleTransactionListRetrieval();
-        }
+        b.mainPager.setCurrentItem(mCurrentPage, false);
+    }
+    @Override
+    protected void onSaveInstanceState(@NotNull Bundle outState) {
+        super.onSaveInstanceState(outState);
+        outState.putInt(STATE_CURRENT_PAGE, b.mainPager.getCurrentItem());
+        if (mainModel.getAccountFilter()
+                     .getValue() != null)
+            outState.putString(STATE_ACC_FILTER, mainModel.getAccountFilter()
+                                                          .getValue());
+    }
+    @Override
+    protected void onDestroy() {
+        mSectionsPagerAdapter = null;
+        b.navProfileList.setAdapter(null);
+        b.drawerLayout.removeDrawerListener(drawerListener);
+        drawerListener = null;
+        b.drawerLayout.removeDrawerListener(barDrawerToggle);
+        barDrawerToggle = null;
+        b.mainPager.unregisterOnPageChangeCallback(pageChangeCallback);
+        pageChangeCallback = null;
+        super.onDestroy();
+    }
+    @Override
+    protected void onResume() {
+        super.onResume();
+        fabShouldShow();
     }
     @Override
     protected void onCreate(Bundle savedInstanceState) {
+        Logger.debug(TAG, "onCreate()/entry");
         super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_main);
-        Toolbar toolbar = findViewById(R.id.toolbar);
-        setSupportActionBar(toolbar);
-
-        Data.profile.addObserver((o, arg) -> {
-            MobileLedgerProfile profile = Data.profile.get();
-            runOnUiThread(() -> {
-                if (profile == null) setTitle(R.string.app_name);
-                else setTitle(profile.getName());
-            });
-        });
+        Logger.debug(TAG, "onCreate()/after super");
+        b = ActivityMainBinding.inflate(getLayoutInflater());
+        setContentView(b.getRoot());
+
+        mainModel = new ViewModelProvider(this).get(MainModel.class);
+
+        mSectionsPagerAdapter = new SectionsPagerAdapter(this);
+
+        Bundle extra = getIntent().getBundleExtra(BUNDLE_SAVED_STATE);
+        if (extra != null && savedInstanceState == null)
+            savedInstanceState = extra;
+
 
-        setupProfile();
+        setSupportActionBar(b.toolbar);
 
-        drawer = findViewById(R.id.drawer_layout);
-        ActionBarDrawerToggle toggle =
-                new ActionBarDrawerToggle(this, drawer, toolbar, R.string.navigation_drawer_open,
-                        R.string.navigation_drawer_close);
-        drawer.addDrawerListener(toggle);
-        toggle.syncState();
+        Data.observeProfile(this, this::onProfileChanged);
 
-        TextView ver = drawer.findViewById(R.id.drawer_version_text);
+        Data.profiles.observe(this, this::onProfileListChanged);
+
+        Data.backgroundTaskProgress.observe(this, this::onRetrieveProgress);
+        Data.backgroundTasksRunning.observe(this, this::onRetrieveRunningChanged);
+
+        if (barDrawerToggle == null) {
+            barDrawerToggle = new ActionBarDrawerToggle(this, b.drawerLayout, b.toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
+            b.drawerLayout.addDrawerListener(barDrawerToggle);
+        }
+        barDrawerToggle.syncState();
 
         try {
-            PackageInfo pi =
-                    getApplicationContext().getPackageManager().getPackageInfo(getPackageName(), 0);
-            ver.setText(pi.versionName);
+            PackageInfo pi = getApplicationContext().getPackageManager()
+                                                    .getPackageInfo(getPackageName(), 0);
+            ((TextView) b.navUpper.findViewById(R.id.drawer_version_text)).setText(pi.versionName);
+            ((TextView) b.noProfilesLayout.findViewById(R.id.drawer_version_text)).setText(pi.versionName);
         }
         catch (Exception e) {
             e.printStackTrace();
         }
 
-        tvLastUpdate = findViewById(R.id.transactions_last_update);
-
-        bTransactionListCancelDownload = findViewById(R.id.transaction_list_cancel_download);
-        progressBar = findViewById(R.id.transaction_list_progress_bar);
-        if (progressBar == null)
-            throw new RuntimeException("Can't get hold on the transaction value progress bar");
-        progressLayout = findViewById(R.id.transaction_progress_layout);
-        if (progressLayout == null) throw new RuntimeException(
-                "Can't get hold on the transaction value progress bar layout");
-
-        fragmentManager = getSupportFragmentManager();
-        mSectionsPagerAdapter = new SectionsPagerAdapter(fragmentManager);
-
-        mViewPager = findViewById(R.id.root_frame);
-        mViewPager.setAdapter(mSectionsPagerAdapter);
-        mViewPager.addOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
-            @Override
-            public void onPageSelected(int position) {
-                switch (position) {
-                    case 0:
-                        markDrawerItemCurrent(R.id.nav_account_summary);
-                        break;
-                    case 1:
-                        markDrawerItemCurrent(R.id.nav_latest_transactions);
-                        break;
-                    default:
-                        Log.e("MainActivity", String.format("Unexpected page index %d", position));
+        markDrawerItemCurrent(R.id.nav_account_summary);
+
+        b.mainPager.setAdapter(mSectionsPagerAdapter);
+        b.mainPager.setOffscreenPageLimit(1);
+
+        if (pageChangeCallback == null) {
+            pageChangeCallback = new ViewPager2.OnPageChangeCallback() {
+                @Override
+                public void onPageSelected(int position) {
+                    mCurrentPage = position;
+                    switch (position) {
+                        case 0:
+                            markDrawerItemCurrent(R.id.nav_account_summary);
+                            break;
+                        case 1:
+                            markDrawerItemCurrent(R.id.nav_latest_transactions);
+                            break;
+                        default:
+                            Log.e(TAG, String.format("Unexpected page index %d", position));
+                    }
+
+                    super.onPageSelected(position);
                 }
+            };
+            b.mainPager.registerOnPageChangeCallback(pageChangeCallback);
+        }
 
-                super.onPageSelected(position);
+        mCurrentPage = 0;
+        if (savedInstanceState != null) {
+            int currentPage = savedInstanceState.getInt(STATE_CURRENT_PAGE, -1);
+            if (currentPage != -1) {
+                mCurrentPage = currentPage;
             }
+            mainModel.getAccountFilter()
+                     .setValue(savedInstanceState.getString(STATE_ACC_FILTER, null));
+        }
+
+        b.btnNoProfilesAdd.setOnClickListener(v -> ProfileDetailActivity.start(this, null));
+        b.btnRestore.setOnClickListener(v -> BackupsActivity.start(this));
+
+        b.btnAddTransaction.setOnClickListener(this::fabNewTransactionClicked);
+
+        b.navNewProfileButton.setOnClickListener(v -> ProfileDetailActivity.start(this, null));
+
+        b.transactionListCancelDownload.setOnClickListener(this::onStopTransactionRefreshClick);
+
+        if (mProfileListAdapter == null)
+            mProfileListAdapter = new ProfilesRecyclerViewAdapter();
+        b.navProfileList.setAdapter(mProfileListAdapter);
+
+        mProfileListAdapter.editingProfiles.observe(this, newValue -> {
+            if (newValue) {
+                b.navProfilesStartEdit.setVisibility(View.GONE);
+                b.navProfilesCancelEdit.setVisibility(View.VISIBLE);
+                b.navNewProfileButton.setVisibility(View.VISIBLE);
+                if (b.drawerLayout.isDrawerOpen(GravityCompat.START)) {
+                    b.navProfilesStartEdit.startAnimation(
+                            AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_out));
+                    b.navProfilesCancelEdit.startAnimation(
+                            AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_in));
+                    b.navNewProfileButton.startAnimation(
+                            AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_in));
+                }
+            }
+            else {
+                b.navProfilesCancelEdit.setVisibility(View.GONE);
+                b.navProfilesStartEdit.setVisibility(View.VISIBLE);
+                b.navNewProfileButton.setVisibility(View.GONE);
+                if (b.drawerLayout.isDrawerOpen(GravityCompat.START)) {
+                    b.navProfilesCancelEdit.startAnimation(
+                            AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_out));
+                    b.navProfilesStartEdit.startAnimation(
+                            AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_in));
+                    b.navNewProfileButton.startAnimation(
+                            AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_out));
+                }
+            }
+
+            mProfileListAdapter.notifyDataSetChanged();
         });
 
-        Data.lastUpdateDate.addObserver((o, arg) -> {
-            Log.d("main", "lastUpdateDate changed");
-            runOnUiThread(() -> {
-                Date date = Data.lastUpdateDate.get();
-                if (date == null) {
-                    tvLastUpdate.setText(R.string.transaction_last_update_never);
+        fabManager = new FabManager(b.btnAddTransaction);
+
+        LinearLayoutManager llm = new LinearLayoutManager(this);
+
+        llm.setOrientation(RecyclerView.VERTICAL);
+        b.navProfileList.setLayoutManager(llm);
+
+        b.navProfilesStartEdit.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
+        b.navProfilesCancelEdit.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
+        b.navProfileListHeadButtons.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
+        if (drawerListener == null) {
+            drawerListener = new DrawerLayout.SimpleDrawerListener() {
+                @Override
+                public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
+                    if (slideOffset > 0.2)
+                        fabManager.hideFab();
                 }
-                else {
-                    final String text = DateFormat.getDateTimeInstance().format(date);
-                    tvLastUpdate.setText(text);
-                    Log.d("despair", String.format("Date formatted: %s", text));
+                @Override
+                public void onDrawerClosed(View drawerView) {
+                    super.onDrawerClosed(drawerView);
+                    mProfileListAdapter.setAnimationsEnabled(false);
+                    mProfileListAdapter.editingProfiles.setValue(false);
+                    Data.drawerOpen.setValue(false);
+                    fabShouldShow();
                 }
-            });
+                @Override
+                public void onDrawerOpened(View drawerView) {
+                    super.onDrawerOpened(drawerView);
+                    mProfileListAdapter.setAnimationsEnabled(true);
+                    Data.drawerOpen.setValue(true);
+                    fabManager.hideFab();
+                }
+            };
+            b.drawerLayout.addDrawerListener(drawerListener);
+        }
+
+        Data.drawerOpen.observe(this, open -> {
+            if (open)
+                b.drawerLayout.open();
+            else
+                b.drawerLayout.close();
         });
+
+        mainModel.getUpdateError()
+                 .observe(this, (error) -> {
+                     if (error == null)
+                         return;
+
+                     Snackbar.make(b.mainPager, error, Snackbar.LENGTH_INDEFINITE)
+                             .show();
+                     mainModel.clearUpdateError();
+                 });
+        Data.locale.observe(this, l -> refreshLastUpdateInfo());
+        Data.lastUpdateDate.observe(this, date -> refreshLastUpdateInfo());
+        Data.lastUpdateTransactionCount.observe(this, date -> refreshLastUpdateInfo());
+        Data.lastUpdateAccountCount.observe(this, date -> refreshLastUpdateInfo());
+        b.navAccountSummary.setOnClickListener(this::onAccountSummaryClicked);
+        b.navLatestTransactions.setOnClickListener(this::onLatestTransactionsClicked);
+        b.navPatterns.setOnClickListener(this::onPatternsClick);
+        b.navBackupRestore.setOnClickListener(this::onBackupRestoreClick);
+    }
+    private void onBackupRestoreClick(View view) {
+        Intent intent = new Intent(this, BackupsActivity.class);
+        startActivity(intent);
     }
-    private void setupProfile() {
-        Data.profiles.setList(MobileLedgerProfile.loadAllFromDB());
-        MobileLedgerProfile profile = null;
-
-        String profileUUID = MLDB.getOption(MLDB.OPT_PROFILE_UUID, null);
-        if (profileUUID == null) {
-            if (Data.profiles.isEmpty()) {
-                Data.profiles.setList(MobileLedgerProfile.createInitialProfileList());
-                profile = Data.profiles.get(0);
-
-                SharedPreferences backend = getSharedPreferences("backend", MODE_PRIVATE);
-                Log.d("profiles", "Migrating from preferences to profiles");
-                // migration to multiple profiles
-                if (profile.getUrl().isEmpty()) {
-                    // no legacy config
-                    Intent intent = new Intent(this, ProfileListActivity.class);
-                    startActivity(intent);
+    private void onPatternsClick(View view) {
+        Intent intent = new Intent(this, TemplatesActivity.class);
+        startActivity(intent);
+    }
+    private void scheduleDataRetrievalIfStale(long lastUpdate) {
+        long now = new Date().getTime();
+        if ((lastUpdate == 0) || (now > (lastUpdate + (24 * 3600 * 1000)))) {
+            if (lastUpdate == 0)
+                Logger.debug("db::", "WEB data never fetched. scheduling a fetch");
+            else
+                Logger.debug("db", String.format(Locale.ENGLISH,
+                        "WEB data last fetched at %1.3f and now is %1.3f. re-fetching",
+                        lastUpdate / 1000f, now / 1000f));
+
+            mainModel.scheduleTransactionListRetrieval();
+        }
+    }
+    private void createShortcuts(@NotNull List<Profile> list) {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N_MR1)
+            return;
+
+        ShortcutManager sm = getSystemService(ShortcutManager.class);
+        List<ShortcutInfo> shortcuts = new ArrayList<>();
+        int i = 0;
+        for (Profile p : list) {
+            if (shortcuts.size() >= sm.getMaxShortcutCountPerActivity())
+                break;
+
+            if (!p.permitPosting())
+                continue;
+
+            final ShortcutInfo.Builder builder =
+                    new ShortcutInfo.Builder(this, "new_transaction_" + p.getId());
+            ShortcutInfo si = builder.setShortLabel(p.getName())
+                                     .setIcon(Icon.createWithResource(this,
+                                             R.drawable.thick_plus_icon))
+                                     .setIntent(new Intent(Intent.ACTION_VIEW, null, this,
+                                             NewTransactionActivity.class).putExtra(
+                                             ProfileThemedActivity.PARAM_PROFILE_ID, p.getId())
+                                                                          .putExtra(
+                                                                                  ProfileThemedActivity.PARAM_THEME,
+                                                                                  p.getTheme()))
+                                     .setRank(i)
+                                     .build();
+            shortcuts.add(si);
+            i++;
+        }
+        sm.setDynamicShortcuts(shortcuts);
+    }
+    private void onProfileListChanged(@NotNull List<Profile> newList) {
+        createShortcuts(newList);
+
+        if (newList.isEmpty()) {
+            b.noProfilesLayout.setVisibility(View.VISIBLE);
+            b.mainAppLayout.setVisibility(View.GONE);
+            return;
+        }
+
+        b.mainAppLayout.setVisibility(View.VISIBLE);
+        b.noProfilesLayout.setVisibility(View.GONE);
+
+        b.navProfileList.setMinimumHeight(
+                (int) (getResources().getDimension(R.dimen.thumb_row_height) * newList.size()));
+
+        Logger.debug("profiles", "profile list changed");
+        mProfileListAdapter.setProfileList(newList);
+
+        final Profile currentProfile = Data.getProfile();
+        Profile replacementProfile = null;
+        if (currentProfile != null) {
+            for (Profile p : newList) {
+                if (p.getId() == currentProfile.getId()) {
+                    replacementProfile = p;
+                    break;
                 }
-                profile.setUrl(backend.getString("backend_url", ""));
-                profile.setAuthEnabled(backend.getBoolean("backend_use_http_auth", false));
-                profile.setAuthUserName(backend.getString("backend_auth_user", null));
-                profile.setAuthPassword(backend.getString("backend_auth_password", null));
-                profile.storeInDB();
-                SharedPreferences.Editor editor = backend.edit();
-                editor.clear();
-                editor.apply();
+            }
+        }
+
+        if (replacementProfile == null) {
+            Logger.debug(TAG, "Switching profile because the current is no longer available");
+            Data.setCurrentProfile(newList.get(0));
+        }
+        else {
+            Data.setCurrentProfile(replacementProfile);
+        }
+    }
+    /**
+     * called when the current profile has changed
+     */
+    private void onProfileChanged(@Nullable Profile newProfile) {
+        if (this.profile != null) {
+            if (this.profile.equals(newProfile))
+                return;
+        }
+
+        boolean haveProfile = newProfile != null;
+
+        if (haveProfile)
+            setTitle(newProfile.getName());
+        else
+            setTitle(R.string.app_name);
+
+        int newProfileTheme = haveProfile ? newProfile.getTheme() : Colors.DEFAULT_HUE_DEG;
+        if (newProfileTheme != Colors.profileThemeId) {
+            Logger.debug("profiles",
+                    String.format(Locale.ENGLISH, "profile theme %d → %d", Colors.profileThemeId,
+                            newProfileTheme));
+            Colors.profileThemeId = newProfileTheme;
+            profileThemeChanged();
+            // profileThemeChanged would restart the activity, so no need to reload the
+            // data sets below
+            return;
+        }
+
+        final boolean sameProfileId = (newProfile != null) && (this.profile != null) &&
+                                      this.profile.getId() == newProfile.getId();
+
+        this.profile = newProfile;
+
+        b.noProfilesLayout.setVisibility(haveProfile ? View.GONE : View.VISIBLE);
+        b.pagerLayout.setVisibility(haveProfile ? View.VISIBLE : View.VISIBLE);
+
+        mProfileListAdapter.notifyDataSetChanged();
+
+        if (haveProfile) {
+            if (newProfile.permitPosting()) {
+                b.toolbar.setSubtitle(null);
+                b.btnAddTransaction.show();
+            }
+            else {
+                b.toolbar.setSubtitle(R.string.profile_subtitle_read_only);
+                b.btnAddTransaction.hide();
             }
         }
         else {
-            profile = MobileLedgerProfile.loadUUIDFromDB(profileUUID);
+            b.toolbar.setSubtitle(null);
+            b.btnAddTransaction.hide();
         }
 
-        if (profile == null) profile = Data.profiles.get(0);
+        updateLastUpdateTextFromDB();
 
-        if (profile == null) throw new AssertionError("profile must have a value");
+        if (sameProfileId) {
+            Logger.debug(TAG, String.format(Locale.ROOT, "Short-cut profile 'changed' to %d",
+                    newProfile.getId()));
+            return;
+        }
 
-        Data.setCurrentProfile(profile);
+        mainModel.getAccountFilter()
+                 .observe(this, this::onAccountFilterChanged);
 
-        if (profile.getUrl().isEmpty()) {
-            Intent intent = new Intent(this, ProfileListActivity.class);
-            Bundle args = new Bundle();
-            args.putInt(ProfileListActivity.ARG_ACTION, ProfileListActivity.ACTION_EDIT_PROFILE);
-            args.putInt(ProfileListActivity.ARG_PROFILE_INDEX, 0);
-            intent.putExtras(args);
-            startActivity(intent, args);
+        mainModel.stopTransactionsRetrieval();
+        mainModel.clearTransactions();
+    }
+    private void onAccountFilterChanged(String accFilter) {
+        Logger.debug(TAG, "account filter changed, reloading transactions");
+//                     mainModel.scheduleTransactionListReload();
+        LiveData<List<TransactionWithAccounts>> transactions =
+                new MutableLiveData<>(new ArrayList<>());
+        if (profile != null) {
+            if (accFilter == null || accFilter.isEmpty()) {
+                transactions = DB.get()
+                                 .getTransactionDAO()
+                                 .getAllWithAccounts(profile.getId());
+            }
+            else {
+                transactions = DB.get()
+                                 .getTransactionDAO()
+                                 .getAllWithAccountsFiltered(profile.getId(), accFilter);
+            }
         }
+
+        transactions.observe(this, list -> {
+            Logger.debug(TAG,
+                    String.format(Locale.ROOT, "got transaction list from DB (%d transactions)",
+                            list.size()));
+
+            if (converterThread != null)
+                converterThread.interrupt();
+            converterThread = new ConverterThread(mainModel, list, accFilter);
+            converterThread.start();
+        });
+    }
+    private void profileThemeChanged() {
+        // un-hook all observed LiveData
+        Data.removeProfileObservers(this);
+        Data.profiles.removeObservers(this);
+        Data.lastUpdateTransactionCount.removeObservers(this);
+        Data.lastUpdateAccountCount.removeObservers(this);
+        Data.lastUpdateDate.removeObservers(this);
+
+        Logger.debug(TAG, "profileThemeChanged(): recreating activity");
+        recreate();
     }
     public void fabNewTransactionClicked(View view) {
         Intent intent = new Intent(this, NewTransactionActivity.class);
+        intent.putExtra(ProfileThemedActivity.PARAM_PROFILE_ID, profile.getId());
+        intent.putExtra(ProfileThemedActivity.PARAM_THEME, profile.getTheme());
         startActivity(intent);
-        overridePendingTransition(R.anim.slide_in_right, R.anim.dummy);
-    }
-    public void navSettingsClicked(View view) {
-        Intent intent = new Intent(this, SettingsActivity.class);
-        startActivity(intent);
-        drawer.closeDrawers();
+        overridePendingTransition(R.anim.slide_in_up, R.anim.dummy);
     }
     public void markDrawerItemCurrent(int id) {
-        TextView item = drawer.findViewById(id);
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
-            item.setBackgroundColor(getResources().getColor(R.color.table_row_dark_bg, getTheme()));
-        }
-        else {
-            item.setBackgroundColor(getResources().getColor(R.color.table_row_dark_bg));
-        }
-
-        @ColorInt int transparent = getResources().getColor(android.R.color.transparent);
+        TextView item = b.drawerLayout.findViewById(id);
+        item.setBackgroundColor(Colors.tableRowDarkBG);
 
-        LinearLayout actions = drawer.findViewById(R.id.nav_actions);
-        for (int i = 0; i < actions.getChildCount(); i++) {
-            View view = actions.getChildAt(i);
+        for (int i = 0; i < b.navActions.getChildCount(); i++) {
+            View view = b.navActions.getChildAt(i);
             if (view.getId() != id) {
-                view.setBackgroundColor(transparent);
+                view.setBackgroundColor(Color.TRANSPARENT);
             }
         }
     }
     public void onAccountSummaryClicked(View view) {
-        drawer.closeDrawers();
+        b.drawerLayout.closeDrawers();
 
         showAccountSummaryFragment();
     }
     private void showAccountSummaryFragment() {
-        mViewPager.setCurrentItem(0, true);
-        TransactionListFragment.accountFilter.set(null);
-//        FragmentTransaction ft = fragmentManager.beginTransaction();
-//        accountSummaryFragment = new AccountSummaryFragment();
-//        ft.replace(R.id.root_frame, accountSummaryFragment);
-//        ft.commit();
-//        currentFragment = accountSummaryFragment;
+        b.mainPager.setCurrentItem(0, true);
+        mainModel.getAccountFilter()
+                 .setValue(null);
     }
     public void onLatestTransactionsClicked(View view) {
-        drawer.closeDrawers();
+        b.drawerLayout.closeDrawers();
 
         showTransactionsFragment(null);
     }
-    private void resetFragmentBackStack() {
-//        fragmentManager.popBackStack(0, FragmentManager.POP_BACK_STACK_INCLUSIVE);
-    }
-    private void showTransactionsFragment(LedgerAccount account) {
-        if (account != null) TransactionListFragment.accountFilter.set(account.getName());
-        mViewPager.setCurrentItem(1, true);
-//        FragmentTransaction ft = fragmentManager.beginTransaction();
-//        if (transactionListFragment == null) {
-//            Log.d("flow", "MainActivity creating TransactionListFragment");
-//            transactionListFragment = new TransactionListFragment();
-//        }
-//        Bundle bundle = new Bundle();
-//        if (account != null) {
-//            bundle.putString(TransactionListFragment.BUNDLE_KEY_FILTER_ACCOUNT_NAME,
-//                    account.getName());
-//        }
-//        transactionListFragment.setArguments(bundle);
-//        ft.replace(R.id.root_frame, transactionListFragment);
-//        if (account != null)
-//            ft.addToBackStack(getResources().getString(R.string.title_activity_transaction_list));
-//        ft.commit();
-//
-//        currentFragment = transactionListFragment;
-    }
-    public void showAccountTransactions(LedgerAccount account) {
-        showTransactionsFragment(account);
+    public void showTransactionsFragment(String accName) {
+        mainModel.getAccountFilter()
+                 .setValue(accName);
+        b.mainPager.setCurrentItem(1, true);
+    }
+    public void showAccountTransactions(String accountName) {
+        mBackMeansToAccountList = true;
+        showTransactionsFragment(accountName);
     }
     @Override
     public void onBackPressed() {
-        DrawerLayout drawer = findViewById(R.id.drawer_layout);
-        if (drawer.isDrawerOpen(GravityCompat.START)) {
-            drawer.closeDrawer(GravityCompat.START);
+        if (b.drawerLayout.isDrawerOpen(GravityCompat.START)) {
+            b.drawerLayout.closeDrawer(GravityCompat.START);
         }
         else {
-            Log.d("fragments",
-                    String.format("manager stack: %d", fragmentManager.getBackStackEntryCount()));
+            if (mBackMeansToAccountList && (b.mainPager.getCurrentItem() == 1)) {
+                mainModel.getAccountFilter()
+                         .setValue(null);
+                showAccountSummaryFragment();
+                mBackMeansToAccountList = false;
+            }
+            else {
+                Logger.debug(TAG, String.format(Locale.ENGLISH, "manager stack: %d",
+                        getSupportFragmentManager().getBackStackEntryCount()));
 
-            super.onBackPressed();
+                super.onBackPressed();
+            }
         }
     }
     public void updateLastUpdateTextFromDB() {
-        {
-            long last_update = Data.profile.get().getLongOption(MLDB.OPT_LAST_SCRAPE, 0L);
-
-            Log.d("transactions", String.format("Last update = %d", last_update));
-            if (last_update == 0) {
-                Data.lastUpdateDate.set(null);
+        if (profile == null)
+            return;
+
+        DB.get()
+          .getOptionDAO()
+          .load(profile.getId(), Option.OPT_LAST_SCRAPE)
+          .observe(this, opt -> {
+              long lastUpdate = 0;
+              if (opt != null) {
+                  try {
+                      lastUpdate = Long.parseLong(opt.getValue());
+                  }
+                  catch (NumberFormatException ex) {
+                      Logger.debug(TAG, String.format("Error parsing '%s' as long", opt.getValue()),
+                              ex);
+                  }
+              }
+
+              if (lastUpdate == 0) {
+                  Data.lastUpdateDate.postValue(null);
+              }
+              else {
+                  Data.lastUpdateDate.postValue(new Date(lastUpdate));
+              }
+
+              scheduleDataRetrievalIfStale(lastUpdate);
+          });
+    }
+    private void refreshLastUpdateInfo() {
+        final int formatFlags = DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_YEAR |
+                                DateUtils.FORMAT_SHOW_TIME | DateUtils.FORMAT_NUMERIC_DATE;
+        String templateForTransactions =
+                getResources().getString(R.string.transaction_count_summary);
+        String templateForAccounts = getResources().getString(R.string.account_count_summary);
+        Integer accountCount = Data.lastUpdateAccountCount.getValue();
+        Integer transactionCount = Data.lastUpdateTransactionCount.getValue();
+        Date lastUpdate = Data.lastUpdateDate.getValue();
+        if (lastUpdate == null) {
+            Data.lastTransactionsUpdateText.setValue("----");
+            Data.lastAccountsUpdateText.setValue("----");
+        }
+        else {
+            Data.lastTransactionsUpdateText.setValue(
+                    String.format(Objects.requireNonNull(Data.locale.getValue()),
+                            templateForTransactions,
+                            transactionCount == null ? 0 : transactionCount,
+                            DateUtils.formatDateTime(this, lastUpdate.getTime(), formatFlags)));
+            Data.lastAccountsUpdateText.setValue(
+                    String.format(Objects.requireNonNull(Data.locale.getValue()),
+                            templateForAccounts, accountCount == null ? 0 : accountCount,
+                            DateUtils.formatDateTime(this, lastUpdate.getTime(), formatFlags)));
+        }
+    }
+    public void onStopTransactionRefreshClick(View view) {
+        Logger.debug(TAG, "Cancelling transactions refresh");
+        mainModel.stopTransactionsRetrieval();
+        b.transactionListCancelDownload.setEnabled(false);
+    }
+    public void onRetrieveRunningChanged(Boolean running) {
+        if (running) {
+            b.transactionListCancelDownload.setEnabled(true);
+            ColorStateList csl = Colors.getColorStateList();
+            b.transactionListProgressBar.setIndeterminateTintList(csl);
+            b.transactionListProgressBar.setProgressTintList(csl);
+            b.transactionListProgressBar.setIndeterminate(true);
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+                b.transactionListProgressBar.setProgress(0, false);
             }
             else {
-                Data.lastUpdateDate.set(new Date(last_update));
+                b.transactionListProgressBar.setProgress(0);
             }
+            b.transactionProgressLayout.setVisibility(View.VISIBLE);
+        }
+        else {
+            b.transactionProgressLayout.setVisibility(View.GONE);
         }
     }
-    public void scheduleTransactionListRetrieval() {
-        retrieveTransactionsTask = new RetrieveTransactionsTask(new WeakReference<>(this));
+    public void onRetrieveProgress(@Nullable RetrieveTransactionsTask.Progress progress) {
+        if (progress == null ||
+            progress.getState() == RetrieveTransactionsTask.ProgressState.FINISHED)
+        {
+            Logger.debug(TAG, "progress: Done");
+            b.transactionProgressLayout.setVisibility(View.GONE);
+
+            mainModel.transactionRetrievalDone();
+
+            String error = (progress == null) ? null : progress.getError();
+            if (error != null) {
+                if (error.equals(RetrieveTransactionsTask.Result.ERR_JSON_PARSER_ERROR))
+                    error = getResources().getString(R.string.err_json_parser_error);
+
+                AlertDialog.Builder builder = new AlertDialog.Builder(this);
+                builder.setMessage(error);
+                builder.setPositiveButton(R.string.btn_profile_options, (dialog, which) -> {
+                    Logger.debug(TAG, "will start profile editor");
+                    ProfileDetailActivity.start(this, profile);
+                });
+                builder.create()
+                       .show();
+                return;
+            }
 
-        retrieveTransactionsTask.execute();
-        bTransactionListCancelDownload.setEnabled(true);
-    }
-    public void onStopTransactionRefreshClick(View view) {
-        Log.d("interactive", "Cancelling transactions refresh");
-        if (retrieveTransactionsTask != null) retrieveTransactionsTask.cancel(false);
-        bTransactionListCancelDownload.setEnabled(false);
-    }
-    public void onRetrieveDone(String error) {
-        progressLayout.setVisibility(View.GONE);
+            return;
+        }
 
-        if (error == null) {
-            updateLastUpdateTextFromDB();
 
-            new RefreshDescriptionsTask().execute();
-        }
-        else Toast.makeText(this, error, Toast.LENGTH_LONG).show();
-    }
-    public void onRetrieveStart() {
-        progressBar.setIndeterminate(true);
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) progressBar.setProgress(0, false);
-        else progressBar.setProgress(0);
-        progressLayout.setVisibility(View.VISIBLE);
-    }
-    public void onRetrieveProgress(RetrieveTransactionsTask.Progress progress) {
-        if ((progress.getTotal() == RetrieveTransactionsTask.Progress.INDETERMINATE) ||
-            (progress.getTotal() == 0))
-        {
-            progressBar.setIndeterminate(true);
+        b.transactionListCancelDownload.setEnabled(true);
+//        ColorStateList csl = Colors.getColorStateList();
+//        progressBar.setIndeterminateTintList(csl);
+//        progressBar.setProgressTintList(csl);
+//        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N)
+//            progressBar.setProgress(0, false);
+//        else
+//            progressBar.setProgress(0);
+        b.transactionProgressLayout.setVisibility(View.VISIBLE);
+
+        if (progress.isIndeterminate() || (progress.getTotal() <= 0)) {
+            b.transactionListProgressBar.setIndeterminate(true);
+            Logger.debug(TAG, "progress: indeterminate");
         }
         else {
-            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-                progressBar.setMin(0);
+            if (b.transactionListProgressBar.isIndeterminate()) {
+                b.transactionListProgressBar.setIndeterminate(false);
             }
-            progressBar.setMax(progress.getTotal());
-            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
-                progressBar.setProgress(progress.getProgress(), true);
-            }
-            else progressBar.setProgress(progress.getProgress());
-            progressBar.setIndeterminate(false);
+//            Logger.debug(TAG,
+//                    String.format(Locale.US, "progress: %d/%d", progress.getProgress(),
+//                    progress.getTotal
+//                    ()));
+            b.transactionListProgressBar.setMax(progress.getTotal());
+            // for some reason animation doesn't work - no progress is shown (stick at 0)
+            // on lineageOS 14.1 (Nougat, 7.1.2)
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N)
+                b.transactionListProgressBar.setProgress(progress.getProgress(), false);
+            else
+                b.transactionListProgressBar.setProgress(progress.getProgress());
         }
     }
-    public void navProfilesClicked(View view) {
-        drawer.closeDrawers();
-        Intent intent = new Intent(this, ProfileListActivity.class);
-        startActivity(intent);
+    public void fabShouldShow() {
+        if ((profile != null) && profile.permitPosting() && !b.drawerLayout.isOpen())
+            fabManager.showFab();
+    }
+    @Override
+    public Context getContext() {
+        return this;
+    }
+    @Override
+    public void showManagedFab() {
+        fabShouldShow();
+    }
+    @Override
+    public void hideManagedFab() {
+        fabManager.hideFab();
     }
-    public class SectionsPagerAdapter extends FragmentPagerAdapter {
+    public static class SectionsPagerAdapter extends FragmentStateAdapter {
 
-        public SectionsPagerAdapter(FragmentManager fm) {
-            super(fm);
+        public SectionsPagerAdapter(@NonNull FragmentActivity fragmentActivity) {
+            super(fragmentActivity);
         }
-
+        @NotNull
         @Override
-        public Fragment getItem(int position) {
-            Log.d("main", String.format("Switching to gragment %d", position));
+        public Fragment createFragment(int position) {
+            Logger.debug(TAG, String.format(Locale.ENGLISH, "Switching to fragment %d", position));
             switch (position) {
                 case 0:
+//                    debug(TAG, "Creating account summary fragment");
                     return new AccountSummaryFragment();
                 case 1:
                     return new TransactionListFragment();
@@ -388,9 +759,41 @@ public class MainActivity extends AppCompatActivity {
         }
 
         @Override
-        public int getCount() {
+        public int getItemCount() {
             return 2;
         }
     }
 
+    static private class ConverterThread extends Thread {
+        private final List<TransactionWithAccounts> list;
+        private final MainModel model;
+        private final String accFilter;
+        public ConverterThread(@NonNull MainModel model,
+                               @NonNull List<TransactionWithAccounts> list, String accFilter) {
+            this.model = model;
+            this.list = list;
+            this.accFilter = accFilter;
+        }
+        @Override
+        public void run() {
+            TransactionAccumulator accumulator = new TransactionAccumulator(accFilter, accFilter);
+
+            for (TransactionWithAccounts tr : list) {
+                if (isInterrupted()) {
+                    Logger.debug(TAG, "ConverterThread bailing out on interrupt");
+                    return;
+                }
+                accumulator.put(new LedgerTransaction(tr));
+            }
+
+            if (isInterrupted()) {
+                Logger.debug(TAG, "ConverterThread bailing out on interrupt");
+                return;
+            }
+
+            Logger.debug(TAG, "ConverterThread publishing results");
+
+            Misc.onMainThread(() -> accumulator.publishResults(model));
+        }
+    }
 }