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 net.ktnx.mobileledger.async.SaveTransactionTask;
  55 import net.ktnx.mobileledger.async.TaskCallback;
  56 import net.ktnx.mobileledger.model.LedgerTransaction;
  57 import net.ktnx.mobileledger.model.LedgerTransactionAccount;
  58 import net.ktnx.mobileledger.ui.DatePickerFragment;
  59 import net.ktnx.mobileledger.utils.MLDB;
  60
  61 import java.util.Date;
  62 import java.util.Objects;
  63
  64 /*
  65  * TODO: nicer progress while transaction is submitted
  66  * TODO: latest transactions, maybe with browsing further in the past?
  67  * TODO: reports
  68  * TODO: get rid of the custom session/cookie and auth code?
  69  *         (the last problem with the POST was the missing content-length header)
  70  * TODO: app icon
  71  * TODO: nicer swiping removal with visual feedback
  72  * TODO: setup wizard
  73  * TODO: update accounts/check settings upon change of backend settings
  74  *  */
  75
  76 public class NewTransactionActivity extends AppCompatActivity implements TaskCallback {
  77     private static SaveTransactionTask saver;
  78     private TableLayout table;
  79     private ProgressBar progress;
  80     private TextView text_date;
  81     private AutoCompleteTextView text_descr;
  82     private MenuItem mSave;
  83
  84     @Override
  85     protected void onCreate(Bundle savedInstanceState) {
  86         super.onCreate(savedInstanceState);
  87         setContentView(R.layout.activity_new_transaction);
  88         Toolbar toolbar = findViewById(R.id.toolbar);
  89         setSupportActionBar(toolbar);
  90
  91         text_date = findViewById(R.id.new_transaction_date);
  92         text_date.setOnFocusChangeListener(new View.OnFocusChangeListener() {
  93             @Override
  94             public void onFocusChange(View v, boolean hasFocus) {
  95                 if (hasFocus) pickTransactionDate(v);
  96             }
  97         });
  98         text_descr = findViewById(R.id.new_transaction_description);
  99         hook_autocompletion_adapter(text_descr, MLDB.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, MLDB.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 void onStart() {
 120         super.onStart();
 121         if (text_descr.getText().toString().isEmpty()) text_descr.requestFocus();
 122     }
 123
 124     @Override
 125     public void finish() {
 126         super.finish();
 127         overridePendingTransition(R.anim.dummy, R.anim.slide_out_right);
 128     }
 129
 130     @Override
 131     public boolean onOptionsItemSelected(MenuItem item) {
 132         switch (item.getItemId()) {
 133             case android.R.id.home:
 134                 finish();
 135                 return true;
 136         }
 137         return super.onOptionsItemSelected(item);
 138     }
 139
 140     public void save_transaction() {
 141         if (mSave != null) mSave.setVisible(false);
 142         toggle_all_editing(false);
 143         progress.setVisibility(View.VISIBLE);
 144
 145         saver = new SaveTransactionTask(this);
 146
 147         saver.setPref(PreferenceManager.getDefaultSharedPreferences(this));
 148         String date = text_date.getText().toString();
 149         if (date.isEmpty()) date = String.valueOf(new Date().getDate());
 150         LedgerTransaction tr = new LedgerTransaction(date, text_descr.getText().toString());
 151
 152         TableLayout table = findViewById(R.id.new_transaction_accounts_table);
 153         for (int i = 0; i < table.getChildCount(); i++) {
 154             TableRow row = (TableRow) table.getChildAt(i);
 155             String acc = ((TextView) row.getChildAt(0)).getText().toString();
 156             String amt = ((TextView) row.getChildAt(1)).getText().toString();
 157             LedgerTransactionAccount item =
 158                     amt.length() > 0 ? new LedgerTransactionAccount(acc, Float.parseFloat(amt))
 159                                      : new LedgerTransactionAccount(acc);
 160
 161             tr.addAccount(item);
 162         }
 163         saver.execute(tr);
 164     }
 165
 166     private void toggle_all_editing(boolean enabled) {
 167         text_date.setEnabled(enabled);
 168         text_descr.setEnabled(enabled);
 169         TableLayout table = findViewById(R.id.new_transaction_accounts_table);
 170         for (int i = 0; i < table.getChildCount(); i++) {
 171             TableRow row = (TableRow) table.getChildAt(i);
 172             for (int j = 0; j < row.getChildCount(); j++) {
 173                 row.getChildAt(j).setEnabled(enabled);
 174             }
 175         }
 176     }
 177
 178     private void hook_swipe_listener(final TableRow row) {
 179         row.getChildAt(0).setOnTouchListener(new OnSwipeTouchListener(this) {
 180             public void onSwipeLeft() {
 181 //                Log.d("swipe", "LEFT" + row.getId());
 182                 if (table.getChildCount() > 2) {
 183                     TableRow prev_row = (TableRow) table.getChildAt(table.indexOfChild(row) - 1);
 184                     TableRow next_row = (TableRow) table.getChildAt(table.indexOfChild(row) + 1);
 185                     TextView prev_amt =
 186                             (prev_row != null) ? (TextView) prev_row.getChildAt(1) : text_descr;
 187                     TextView next_acc =
 188                             (next_row != null) ? (TextView) next_row.getChildAt(0) : null;
 189
 190                     if (next_acc == null) {
 191                         prev_amt.setNextFocusRightId(R.id.none);
 192                         prev_amt.setNextFocusForwardId(R.id.none);
 193                         prev_amt.setImeOptions(EditorInfo.IME_ACTION_DONE);
 194                     }
 195                     else {
 196                         prev_amt.setNextFocusRightId(next_acc.getId());
 197                         prev_amt.setNextFocusForwardId(next_acc.getId());
 198                         prev_amt.setImeOptions(EditorInfo.IME_ACTION_NEXT);
 199                     }
 200
 201                     if (row.hasFocus()) {
 202                         if (next_acc != null) next_acc.requestFocus();
 203                         else prev_amt.requestFocus();
 204                     }
 205
 206                     table.removeView(row);
 207                     check_transaction_submittable();
 208 //                    Toast.makeText(NewTransactionActivity.this, "LEFT", Toast.LENGTH_LONG).show();
 209                 }
 210                 else {
 211                     Snackbar.make(table, R.string.msg_at_least_two_accounts_are_required,
 212                             Snackbar.LENGTH_LONG).setAction("Action", null).show();
 213                 }
 214             }
 215             //            @Override
 216 //            public boolean performClick(View view, MotionEvent m) {
 217 //                return true;
 218 //            }
 219             public boolean onTouch(View view, MotionEvent m) {
 220                 return gestureDetector.onTouchEvent(m);
 221             }
 222         });
 223     }
 224
 225     private void hook_text_change_listener(final TextView view) {
 226         view.addTextChangedListener(new TextWatcher() {
 227             @Override
 228             public void beforeTextChanged(CharSequence s, int start, int count, int after) {
 229
 230             }
 231
 232             @Override
 233             public void onTextChanged(CharSequence s, int start, int before, int count) {
 234
 235             }
 236
 237             @Override
 238             public void afterTextChanged(Editable s) {
 239 //                Log.d("input", "text changed");
 240                 check_transaction_submittable();
 241             }
 242         });
 243
 244     }
 245
 246     @TargetApi(Build.VERSION_CODES.N)
 247     private void hook_autocompletion_adapter(final AutoCompleteTextView view, final String table,
 248                                              final String field) {
 249         String[] from = {field};
 250         int[] to = {android.R.id.text1};
 251         SimpleCursorAdapter adapter =
 252                 new SimpleCursorAdapter(this, android.R.layout.simple_dropdown_item_1line, null,
 253                         from, to, 0);
 254         adapter.setStringConversionColumn(1);
 255
 256         FilterQueryProvider provider = new FilterQueryProvider() {
 257             @Override
 258             public Cursor runQuery(CharSequence constraint) {
 259                 if (constraint == null) return null;
 260
 261                 String str = constraint.toString().toUpperCase();
 262                 Log.d("autocompletion", "Looking for " + str);
 263                 String[] col_names = {FontsContract.Columns._ID, field};
 264                 MatrixCursor c = new MatrixCursor(col_names);
 265
 266                 try (SQLiteDatabase db = MLDB.getReadableDatabase(getApplicationContext())) {
 267
 268                     try (Cursor matches = db.rawQuery(String.format(
 269                             "SELECT %s as a, case when %s_upper LIKE ?||'%%' then 1 " +
 270                             "WHEN %s_upper LIKE '%%:'||?||'%%' then 2 " +
 271                             "WHEN %s_upper LIKE '%% '||?||'%%' then 3 " + "else 9 end " +
 272                             "FROM %s " + "WHERE %s_upper LIKE '%%'||?||'%%' " + "ORDER BY 2, 1;",
 273                             field, field, field, field, table, field),
 274                             new String[]{str, str, str, str}))
 275                     {
 276                         int i = 0;
 277                         while (matches.moveToNext()) {
 278                             String match = matches.getString(0);
 279                             int order = matches.getInt(1);
 280                             Log.d("autocompletion", String.format("match: %s |%d", match, order));
 281                             c.newRow().add(i++).add(match);
 282                         }
 283                     }
 284
 285                     return c;
 286                 }
 287
 288             }
 289         };
 290
 291         adapter.setFilterQueryProvider(provider);
 292
 293         view.setAdapter(adapter);
 294     }
 295
 296     public boolean onCreateOptionsMenu(Menu menu) {
 297         // Inflate the menu; this adds items to the action bar if it is present.
 298         getMenuInflater().inflate(R.menu.new_transaction, menu);
 299         mSave = menu.findItem(R.id.action_submit_transaction);
 300         if (mSave == null) throw new AssertionError();
 301
 302         check_transaction_submittable();
 303
 304         return true;
 305     }
 306
 307     public void pickTransactionDate(View view) {
 308         DialogFragment picker = new DatePickerFragment();
 309         picker.show(getSupportFragmentManager(), "datePicker");
 310     }
 311
 312     public int dp2px(float dp) {
 313         return Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp,
 314                 getResources().getDisplayMetrics()));
 315     }
 316
 317     private void do_add_account_row(boolean focus) {
 318         final AutoCompleteTextView acc = new AutoCompleteTextView(this);
 319         acc.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT,
 320                 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 |
 333                          InputType.TYPE_NUMBER_FLAG_DECIMAL);
 334         amt.setMinWidth(dp2px(40));
 335         amt.setTextAlignment(EditText.TEXT_ALIGNMENT_VIEW_END);
 336         amt.setImeOptions(EditorInfo.IME_ACTION_DONE);
 337
 338         // forward navigation support
 339         final TableRow last_row = (TableRow) table.getChildAt(table.getChildCount() - 1);
 340         final TextView last_amt = (TextView) last_row.getChildAt(1);
 341         last_amt.setNextFocusForwardId(acc.getId());
 342         last_amt.setNextFocusRightId(acc.getId());
 343         last_amt.setImeOptions(EditorInfo.IME_ACTION_NEXT);
 344         acc.setNextFocusForwardId(amt.getId());
 345         acc.setNextFocusRightId(amt.getId());
 346
 347         final TableRow row = new TableRow(this);
 348         row.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT,
 349                 TableRow.LayoutParams.MATCH_PARENT));
 350         row.setGravity(Gravity.BOTTOM);
 351         row.addView(acc);
 352         row.addView(amt);
 353         table.addView(row);
 354
 355         if (focus) acc.requestFocus();
 356
 357         hook_swipe_listener(row);
 358         hook_autocompletion_adapter(acc, MLDB.ACCOUNTS_TABLE, "name");
 359         hook_text_change_listener(acc);
 360         hook_text_change_listener(amt);
 361     }
 362
 363     public void addTransactionAccountFromMenu(MenuItem item) {
 364         do_add_account_row(true);
 365     }
 366
 367     public void resetTransactionFromMenu(MenuItem item) {
 368         reset_form();
 369     }
 370
 371     public void saveTransactionFromMenu(MenuItem item) {
 372         save_transaction();
 373     }
 374
 375     private 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) &&
 438                 ((table.getChildCount() == accounts) || (table.getChildCount() == 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,
 446                     accounts_with_values, 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(running_total)))
 452             {
 453                 if (mSave != null) mSave.setVisible(true);
 454             }
 455             else if (mSave != null) mSave.setVisible(false);
 456
 457             if (single_empty_amount) {
 458                 empty_amount
 459                         .setHint(String.format("%1.2f", (running_total > 0) ? -running_total : 0f));
 460             }
 461
 462         }
 463         catch (NumberFormatException e) {
 464             if (mSave != null) mSave.setVisible(false);
 465         }
 466         catch (Exception e) {
 467             e.printStackTrace();
 468             if (mSave != null) mSave.setVisible(false);
 469         }
 470     }
 471
 472     @Override
 473     public void done(String error) {
 474         progress.setVisibility(View.INVISIBLE);
 475         Log.d("visuals", "hiding progress");
 476
 477         if (error == null) reset_form();
 478         else Snackbar.make(findViewById(R.id.new_transaction_accounts_table), error,
 479                 BaseTransientBottomBar.LENGTH_LONG).show();
 480
 481         toggle_all_editing(true);
 482         check_transaction_submittable();
 483     }
 484
 485     private void reset_form() {
 486         text_date.setText("");
 487         text_descr.setText("");
 488
 489         text_descr.requestFocus();
 490
 491         while (table.getChildCount() > 2) {
 492             table.removeViewAt(2);
 493         }
 494         for (int i = 0; i < 2; i++) {
 495             TableRow tr = (TableRow) table.getChildAt(i);
 496             if (tr == null) break;
 497
 498             ((TextView) tr.getChildAt(0)).setText("");
 499             ((TextView) tr.getChildAt(1)).setText("");
 500         }
 501     }
 502 }