app/src/main/java/net/ktnx/mobileledger/NewTransactionActivity.java

   1 /*
   2  * Copyright © 2018 Damyan Ivanov.
   3  * This file is part of Mobile-Ledger.
   4  * Mobile-Ledger is free software: you can distribute it and/or modify it
   5  * under the term of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your opinion), any later version.
   8  *
   9  * Mobile-Ledger is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12  * GNU General Public License terms for details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with Mobile-Ledger. If not, see <https://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.ktnx.mobileledger;
  19
  20 import android.annotation.SuppressLint;
  21 import android.annotation.TargetApi;
  22 import android.database.Cursor;
  23 import android.database.MatrixCursor;
  24 import android.database.sqlite.SQLiteDatabase;
  25 import android.os.Build;
  26 import android.os.Bundle;
  27 import android.preference.PreferenceManager;
  28 import android.provider.FontsContract;
  29 import android.support.design.widget.BaseTransientBottomBar;
  30 import android.support.design.widget.Snackbar;
  31 import android.support.v4.app.DialogFragment;
  32 import android.support.v7.app.AppCompatActivity;
  33 import android.support.v7.widget.Toolbar;
  34 import android.text.Editable;
  35 import android.text.InputType;
  36 import android.text.TextWatcher;
  37 import android.util.Log;
  38 import android.util.TypedValue;
  39 import android.view.Gravity;
  40 import android.view.Menu;
  41 import android.view.MenuItem;
  42 import android.view.MotionEvent;
  43 import android.view.View;
  44 import android.view.inputmethod.EditorInfo;
  45 import android.widget.AutoCompleteTextView;
  46 import android.widget.EditText;
  47 import android.widget.FilterQueryProvider;
  48 import android.widget.ProgressBar;
  49 import android.widget.SimpleCursorAdapter;
  50 import android.widget.TableLayout;
  51 import android.widget.TableRow;
  52 import android.widget.TextView;
  53
  54 import java.util.Date;
  55 import java.util.Objects;
  56
  57 /*
  58  * TODO: auto-fill of transaction description
  59  *       if Android O's implementation won't work, add a custom one
  60  * TODO: nicer progress while transaction is submitted
  61  * TODO: latest transactions, maybe with browsing further in the past?
  62  * TODO: reports
  63  * TODO: get rid of the custom session/cookie and auth code?
  64  *         (the last problem with the POST was the missing content-length header)
  65  * TODO: app icon
  66  * TODO: nicer swiping removal with visual feedback
  67  * TODO: setup wizard
  68  * TODO: update accounts/check settings upon change of backend settings
  69  *  */
  70
  71 public class NewTransactionActivity extends AppCompatActivity implements TaskCallback {
  72     private TableLayout table;
  73     private ProgressBar progress;
  74     private TextView text_date;
  75     private AutoCompleteTextView text_descr;
  76     private static SaveTransactionTask saver;
  77     private MenuItem mSave;
  78     private MobileLedgerDatabase dbh;
  79
  80     @Override
  81     protected void onCreate(Bundle savedInstanceState) {
  82         super.onCreate(savedInstanceState);
  83         setContentView(R.layout.activity_new_transaction);
  84         Toolbar toolbar = findViewById(R.id.toolbar);
  85         setSupportActionBar(toolbar);
  86
  87         dbh = new MobileLedgerDatabase(this);
  88
  89         text_date = findViewById(R.id.new_transaction_date);
  90         text_date.setOnFocusChangeListener(new View.OnFocusChangeListener() {
  91             @Override
  92             public
  93             void onFocusChange(View v, boolean hasFocus) {
  94                 if (hasFocus) pickTransactionDate(v);
  95             }
  96         });
  97         text_descr = findViewById(R.id.new_transaction_description);
  98         hook_autocompletion_adapter(text_descr, MobileLedgerDatabase
  99                 .DESCRIPTION_HISTORY_TABLE, "description");
 100         hook_text_change_listener(text_descr);
 101
 102         progress = findViewById(R.id.save_transaction_progress);
 103
 104         Objects.requireNonNull(getSupportActionBar()).setDisplayHomeAsUpEnabled(true);
 105         table = findViewById(R.id.new_transaction_accounts_table);
 106         for (int i = 0; i < table.getChildCount(); i++) {
 107             TableRow row = (TableRow) table.getChildAt(i);
 108             AutoCompleteTextView acc_name_view = (AutoCompleteTextView) row.getChildAt(0);
 109             TextView amount_view = (TextView) row.getChildAt(1);
 110             hook_swipe_listener(row);
 111             hook_autocompletion_adapter(acc_name_view, MobileLedgerDatabase.ACCOUNTS_TABLE, "name");
 112             hook_text_change_listener(acc_name_view);
 113             hook_text_change_listener(amount_view);
 114 //            Log.d("swipe", "hooked to row "+i);
 115         }
 116     }
 117
 118     @Override
 119     protected
 120     void onStart() {
 121         super.onStart();
 122         if (text_descr.getText().toString().isEmpty()) text_descr.requestFocus();
 123     }
 124
 125     @Override
 126     public void finish() {
 127         super.finish();
 128         overridePendingTransition(R.anim.dummy, R.anim.slide_out_right);
 129     }
 130
 131     @Override
 132     public boolean onOptionsItemSelected(MenuItem item) {
 133         switch (item.getItemId()) {
 134             case android.R.id.home:
 135                 finish();
 136                 return true;
 137         }
 138         return super.onOptionsItemSelected(item);
 139     }
 140
 141     public void save_transaction() {
 142         if (mSave != null) mSave.setVisible(false);
 143         toggle_all_editing(false);
 144         progress.setVisibility(View.VISIBLE);
 145
 146         saver = new SaveTransactionTask(this);
 147
 148         saver.setPref(PreferenceManager.getDefaultSharedPreferences(this));
 149         String date = text_date.getText().toString();
 150         if (date.isEmpty()) date = String.valueOf(new Date().getDate());
 151         LedgerTransaction tr = new LedgerTransaction(date, text_descr.getText().toString());
 152
 153         TableLayout table = findViewById(R.id.new_transaction_accounts_table);
 154         for ( int i = 0; i < table.getChildCount(); i++ ) {
 155             TableRow row = (TableRow) table.getChildAt(i);
 156             String acc = ((TextView) row.getChildAt(0)).getText().toString();
 157             String amt = ((TextView) row.getChildAt(1)).getText().toString();
 158             LedgerTransactionItem item =
 159                     amt.length() > 0
 160                     ? new LedgerTransactionItem( acc, Float.parseFloat(amt))
 161                     : new LedgerTransactionItem( acc );
 162
 163             tr.add_item(item);
 164         }
 165         saver.execute(tr);
 166     }
 167
 168     private void toggle_all_editing(boolean enabled) {
 169         text_date.setEnabled(enabled);
 170         text_descr.setEnabled(enabled);
 171         TableLayout table = findViewById(R.id.new_transaction_accounts_table);
 172         for (int i = 0; i < table.getChildCount(); i++) {
 173             TableRow row = (TableRow) table.getChildAt(i);
 174             for (int j = 0; j < row.getChildCount(); j++) {
 175                 row.getChildAt(j).setEnabled(enabled);
 176             }
 177         }
 178     }
 179
 180     private void hook_swipe_listener(final TableRow row) {
 181         row.getChildAt(0).setOnTouchListener(new OnSwipeTouchListener(this) {
 182             public void onSwipeLeft() {
 183 //                Log.d("swipe", "LEFT" + row.getId());
 184                 if (table.getChildCount() > 2) {
 185                     TableRow prev_row = (TableRow) table.getChildAt(table.indexOfChild(row) - 1);
 186                     TableRow next_row = (TableRow) table.getChildAt(table.indexOfChild(row) + 1);
 187                     TextView prev_amt =
 188                             (prev_row != null) ? (TextView) prev_row.getChildAt(1) : text_descr;
 189                     TextView next_acc =
 190                             (next_row != null) ? (TextView) next_row.getChildAt(0) : null;
 191
 192                     if (next_acc == null) {
 193                         prev_amt.setNextFocusRightId(R.id.none);
 194                         prev_amt.setNextFocusForwardId(R.id.none);
 195                         prev_amt.setImeOptions(EditorInfo.IME_ACTION_DONE);
 196                     }
 197                     else {
 198                         prev_amt.setNextFocusRightId(next_acc.getId());
 199                         prev_amt.setNextFocusForwardId(next_acc.getId());
 200                         prev_amt.setImeOptions(EditorInfo.IME_ACTION_NEXT);
 201                     }
 202
 203                     if (row.hasFocus()) {
 204                         if (next_acc != null) next_acc.requestFocus();
 205                         else prev_amt.requestFocus();
 206                     }
 207
 208                     table.removeView(row);
 209                     check_transaction_submittable();
 210 //                    Toast.makeText(NewTransactionActivity.this, "LEFT", Toast.LENGTH_LONG).show();
 211                 }
 212                 else {
 213                     Snackbar.make(table, R.string.msg_at_least_two_accounts_are_required, Snackbar.LENGTH_LONG)
 214                             .setAction("Action", null).show();
 215                 }
 216             }
 217 //            @Override
 218 //            public boolean performClick(View view, MotionEvent m) {
 219 //                return true;
 220 //            }
 221             public boolean onTouch(View view, MotionEvent m) {
 222                 return gestureDetector.onTouchEvent(m);
 223             }
 224         });
 225     }
 226
 227     private void hook_text_change_listener(final TextView view) {
 228         view.addTextChangedListener(new TextWatcher() {
 229             @Override
 230             public void beforeTextChanged(CharSequence s, int start, int count, int after) {
 231
 232             }
 233
 234             @Override
 235             public void onTextChanged(CharSequence s, int start, int before, int count) {
 236
 237             }
 238
 239             @Override
 240             public void afterTextChanged(Editable s) {
 241 //                Log.d("input", "text changed");
 242                 check_transaction_submittable();
 243             }
 244         });
 245
 246     }
 247
 248     @TargetApi(Build.VERSION_CODES.N)
 249     private void hook_autocompletion_adapter(final AutoCompleteTextView view, final String table, final String field) {
 250         String[] from = {field};
 251         int[] to = {android.R.id.text1};
 252         SimpleCursorAdapter adapter =
 253                 new SimpleCursorAdapter(this, android.R.layout.simple_dropdown_item_1line, null,
 254                         from, to, 0);
 255         adapter.setStringConversionColumn(1);
 256
 257         FilterQueryProvider provider = new FilterQueryProvider() {
 258             @Override
 259             public
 260             Cursor runQuery(CharSequence constraint) {
 261                 if (constraint == null) return null;
 262
 263                 String str = constraint.toString().toUpperCase();
 264                 Log.d("autocompletion", "Looking for " + str);
 265                 String[] col_names = {FontsContract.Columns._ID, field};
 266                 MatrixCursor c = new MatrixCursor(col_names);
 267
 268                 try (SQLiteDatabase db = dbh.getReadableDatabase()) {
 269
 270                     try (Cursor matches = db.rawQuery(String.format(
 271                             "SELECT %s as a, case when %s_upper LIKE ?||'%%' then 1 "
 272                                     + "WHEN %s_upper LIKE '%%:'||?||'%%' then 2 "
 273                                     + "WHEN %s_upper LIKE '%% '||?||'%%' then 3 " + "else 9 end "
 274                                     + "FROM %s " + "WHERE %s_upper LIKE '%%'||?||'%%' "
 275                                     + "ORDER BY 2, 1;", field, field, field, field, table, field),
 276                             new String[]{str, str, str, str}))
 277                     {
 278                         int i = 0;
 279                         while (matches.moveToNext()) {
 280                             String match = matches.getString(0);
 281                             int order = matches.getInt(1);
 282                             Log.d("autocompletion", String.format("match: %s |%d", match, order));
 283                             c.newRow().add(i++).add(match);
 284                         }
 285                     }
 286
 287                     return c;
 288                 }
 289
 290             }
 291         };
 292
 293         adapter.setFilterQueryProvider(provider);
 294
 295         view.setAdapter(adapter);
 296     }
 297
 298     public boolean onCreateOptionsMenu(Menu menu) {
 299         // Inflate the menu; this adds items to the action bar if it is present.
 300         getMenuInflater().inflate(R.menu.new_transaction, menu);
 301         mSave = menu.findItem(R.id.action_submit_transaction);
 302         if (mSave == null) throw new AssertionError();
 303
 304         check_transaction_submittable();
 305
 306         return true;
 307     }
 308
 309     public void pickTransactionDate(View view) {
 310         DialogFragment picker = new DatePickerFragment();
 311         picker.show(getSupportFragmentManager(), "datePicker");
 312     }
 313
 314     public int dp2px(float dp) {
 315         return Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, getResources().getDisplayMetrics()));
 316     }
 317
 318     private void do_add_account_row(boolean focus) {
 319         final AutoCompleteTextView acc = new AutoCompleteTextView(this);
 320         acc.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT, 9f));
 321         acc.setHint(R.string.new_transaction_account_hint);
 322         acc.setWidth(0);
 323         acc.setImeOptions(EditorInfo.IME_ACTION_NEXT | EditorInfo.IME_FLAG_NO_ENTER_ACTION
 324                 | EditorInfo.IME_FLAG_NAVIGATE_NEXT);
 325         acc.setSingleLine(true);
 326
 327         final EditText amt = new EditText(this);
 328         amt.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.WRAP_CONTENT,
 329                 TableRow.LayoutParams.MATCH_PARENT, 1f));
 330         amt.setHint(R.string.new_transaction_amount_hint);
 331         amt.setWidth(0);
 332         amt.setInputType(InputType.TYPE_CLASS_NUMBER | InputType.TYPE_NUMBER_FLAG_SIGNED | InputType.TYPE_NUMBER_FLAG_DECIMAL );
 333         amt.setMinWidth(dp2px(40));
 334         amt.setTextAlignment(EditText.TEXT_ALIGNMENT_VIEW_END);
 335         amt.setImeOptions(EditorInfo.IME_ACTION_DONE);
 336
 337         // forward navigation support
 338         final TableRow last_row = (TableRow) table.getChildAt(table.getChildCount() - 1);
 339         final TextView last_amt = (TextView) last_row.getChildAt(1);
 340         last_amt.setNextFocusForwardId(acc.getId());
 341         last_amt.setNextFocusRightId(acc.getId());
 342         last_amt.setImeOptions(EditorInfo.IME_ACTION_NEXT);
 343         acc.setNextFocusForwardId(amt.getId());
 344         acc.setNextFocusRightId(amt.getId());
 345
 346         final TableRow row = new TableRow(this);
 347         row.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.MATCH_PARENT));
 348         row.setGravity(Gravity.BOTTOM);
 349         row.addView(acc);
 350         row.addView(amt);
 351         table.addView(row);
 352
 353         if (focus) acc.requestFocus();
 354
 355         hook_swipe_listener(row);
 356         hook_autocompletion_adapter(acc, MobileLedgerDatabase.ACCOUNTS_TABLE, "name");
 357         hook_text_change_listener(acc);
 358         hook_text_change_listener(amt);
 359     }
 360
 361     public void addTransactionAccountFromMenu(MenuItem item) {
 362         do_add_account_row(true);
 363     }
 364
 365     public
 366     void resetTransactionFromMenu(MenuItem item) {
 367         reset_form();
 368     }
 369
 370     public void saveTransactionFromMenu(MenuItem item) {
 371         save_transaction();
 372     }
 373
 374     private
 375     boolean is_zero(float f) {
 376         return (f < 0.005) && (f > -0.005);
 377     }
 378
 379     // rules:
 380     // 1) at least two account names
 381     // 2) each amount must have account name
 382     // 3) amounts must balance to 0, or
 383     // 3a) there must be exactly one empty amount
 384     // 4) empty accounts with empty amounts are ignored
 385     // 5) a row with an empty account name or empty amount is guaranteed to exist
 386     @SuppressLint("DefaultLocale")
 387     private void check_transaction_submittable() {
 388         TableLayout table = findViewById(R.id.new_transaction_accounts_table);
 389         int accounts = 0;
 390         int accounts_with_values = 0;
 391         int amounts = 0;
 392         int amounts_with_accounts = 0;
 393         int empty_rows = 0;
 394         TextView empty_amount = null;
 395         boolean single_empty_amount = false;
 396         boolean single_empty_amount_has_account = false;
 397         float running_total = 0f;
 398         boolean have_description =
 399                 !((TextView) findViewById(R.id.new_transaction_description)).getText().toString()
 400                         .isEmpty();
 401
 402         try {
 403             for (int i = 0; i < table.getChildCount(); i++) {
 404                 TableRow row = (TableRow) table.getChildAt(i);
 405
 406                 TextView acc_name_v = (TextView) row.getChildAt(0);
 407                 TextView amount_v = (TextView) row.getChildAt(1);
 408                 String amt = String.valueOf(amount_v.getText());
 409                 String acc_name = String.valueOf(acc_name_v.getText());
 410                 acc_name = acc_name.trim();
 411
 412                 if (!acc_name.isEmpty()) {
 413                     accounts++;
 414
 415                     if (!amt.isEmpty()) {
 416                         accounts_with_values++;
 417                     }
 418                 }
 419                 else empty_rows++;
 420
 421                 if (amt.isEmpty()) {
 422                     amount_v.setHint(String.format("%1.2f", 0f));
 423                     if (empty_amount == null) {
 424                         empty_amount = amount_v;
 425                         single_empty_amount = true;
 426                         single_empty_amount_has_account = !acc_name.isEmpty();
 427                     }
 428                     else if (!acc_name.isEmpty()) single_empty_amount = false;
 429                 }
 430                 else {
 431                     amounts++;
 432                     if (!acc_name.isEmpty()) amounts_with_accounts++;
 433                     running_total += Float.valueOf(amt);
 434                 }
 435             }
 436
 437             if ((empty_rows == 0) && ((table.getChildCount() == accounts) || (table.getChildCount()
 438                     == amounts)))
 439             {
 440                 do_add_account_row(false);
 441             }
 442
 443             Log.d("submittable", String.format("accounts=%d, accounts_with_values=%s, "
 444                             + "amounts_with_accounts=%d, amounts=%d, running_total=%1.2f, "
 445                             + "single_empty_with_acc=%s", accounts, accounts_with_values,
 446                     amounts_with_accounts, amounts, running_total,
 447                     (single_empty_amount && single_empty_amount_has_account) ? "true" : "false"));
 448
 449             if (have_description && (accounts >= 2) && (accounts_with_values >= (accounts - 1)) && (
 450                     amounts_with_accounts == amounts) && (
 451                     single_empty_amount && single_empty_amount_has_account || is_zero(
 452                             running_total)))
 453             {
 454                 if (mSave != null) mSave.setVisible(true);
 455             }
 456             else if (mSave != null) mSave.setVisible(false);
 457
 458             if (single_empty_amount) {
 459                 empty_amount
 460                         .setHint(String.format("%1.2f", (running_total > 0) ? -running_total : 0f));
 461             }
 462
 463         }
 464         catch (NumberFormatException e) {
 465             if (mSave != null) mSave.setVisible(false);
 466         }
 467         catch (Exception e) {
 468             e.printStackTrace();
 469             if (mSave != null) mSave.setVisible(false);
 470         }
 471     }
 472
 473     @Override
 474     public
 475     void done(String error) {
 476         progress.setVisibility(View.INVISIBLE);
 477         Log.d("visuals", "hiding progress");
 478
 479         if (error == null) reset_form();
 480         else Snackbar.make(findViewById(R.id.new_transaction_accounts_table), error,
 481                 BaseTransientBottomBar.LENGTH_LONG).show();
 482
 483         toggle_all_editing(true);
 484         check_transaction_submittable();
 485     }
 486
 487     private void reset_form() {
 488         text_date.setText("");
 489         text_descr.setText("");
 490
 491         text_descr.requestFocus();
 492
 493         while(table.getChildCount() > 2) {
 494             table.removeViewAt(2);
 495         }
 496         for( int i = 0; i < 2; i++ ) {
 497             TableRow tr = (TableRow) table.getChildAt(i);
 498             if ( tr == null) break;
 499
 500             ((TextView)tr.getChildAt(0)).setText("");
 501             ((TextView)tr.getChildAt(1)).setText("");
 502         }
 503     }
 504 }