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.LedgerTransactionItem;
  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 TableLayout table;
  78     private ProgressBar progress;
  79     private TextView text_date;
  80     private AutoCompleteTextView text_descr;
  81     private static SaveTransactionTask saver;
  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
  95             void onFocusChange(View v, boolean hasFocus) {
  96                 if (hasFocus) pickTransactionDate(v);
  97             }
  98         });
  99         text_descr = findViewById(R.id.new_transaction_description);
 100         hook_autocompletion_adapter(text_descr, MLDB.DESCRIPTION_HISTORY_TABLE, "description");
 101         hook_text_change_listener(text_descr);
 102
 103         progress = findViewById(R.id.save_transaction_progress);
 104
 105         Objects.requireNonNull(getSupportActionBar()).setDisplayHomeAsUpEnabled(true);
 106         table = findViewById(R.id.new_transaction_accounts_table);
 107         for (int i = 0; i < table.getChildCount(); i++) {
 108             TableRow row = (TableRow) table.getChildAt(i);
 109             AutoCompleteTextView acc_name_view = (AutoCompleteTextView) row.getChildAt(0);
 110             TextView amount_view = (TextView) row.getChildAt(1);
 111             hook_swipe_listener(row);
 112             hook_autocompletion_adapter(acc_name_view, MLDB.ACCOUNTS_TABLE, "name");
 113             hook_text_change_listener(acc_name_view);
 114             hook_text_change_listener(amount_view);
 115 //            Log.d("swipe", "hooked to row "+i);
 116         }
 117     }
 118
 119     @Override
 120     protected
 121     void onStart() {
 122         super.onStart();
 123         if (text_descr.getText().toString().isEmpty()) text_descr.requestFocus();
 124     }
 125
 126     @Override
 127     public void finish() {
 128         super.finish();
 129         overridePendingTransition(R.anim.dummy, R.anim.slide_out_right);
 130     }
 131
 132     @Override
 133     public boolean onOptionsItemSelected(MenuItem item) {
 134         switch (item.getItemId()) {
 135             case android.R.id.home:
 136                 finish();
 137                 return true;
 138         }
 139         return super.onOptionsItemSelected(item);
 140     }
 141
 142     public void save_transaction() {
 143         if (mSave != null) mSave.setVisible(false);
 144         toggle_all_editing(false);
 145         progress.setVisibility(View.VISIBLE);
 146
 147         saver = new SaveTransactionTask(this);
 148
 149         saver.setPref(PreferenceManager.getDefaultSharedPreferences(this));
 150         String date = text_date.getText().toString();
 151         if (date.isEmpty()) date = String.valueOf(new Date().getDate());
 152         LedgerTransaction tr = new LedgerTransaction(date, text_descr.getText().toString());
 153
 154         TableLayout table = findViewById(R.id.new_transaction_accounts_table);
 155         for ( int i = 0; i < table.getChildCount(); i++ ) {
 156             TableRow row = (TableRow) table.getChildAt(i);
 157             String acc = ((TextView) row.getChildAt(0)).getText().toString();
 158             String amt = ((TextView) row.getChildAt(1)).getText().toString();
 159             LedgerTransactionItem item =
 160                     amt.length() > 0
 161                     ? new LedgerTransactionItem( acc, Float.parseFloat(amt))
 162                     : new LedgerTransactionItem( acc );
 163
 164             tr.add_item(item);
 165         }
 166         saver.execute(tr);
 167     }
 168
 169     private void toggle_all_editing(boolean enabled) {
 170         text_date.setEnabled(enabled);
 171         text_descr.setEnabled(enabled);
 172         TableLayout table = findViewById(R.id.new_transaction_accounts_table);
 173         for (int i = 0; i < table.getChildCount(); i++) {
 174             TableRow row = (TableRow) table.getChildAt(i);
 175             for (int j = 0; j < row.getChildCount(); j++) {
 176                 row.getChildAt(j).setEnabled(enabled);
 177             }
 178         }
 179     }
 180
 181     private void hook_swipe_listener(final TableRow row) {
 182         row.getChildAt(0).setOnTouchListener(new OnSwipeTouchListener(this) {
 183             public void onSwipeLeft() {
 184 //                Log.d("swipe", "LEFT" + row.getId());
 185                 if (table.getChildCount() > 2) {
 186                     TableRow prev_row = (TableRow) table.getChildAt(table.indexOfChild(row) - 1);
 187                     TableRow next_row = (TableRow) table.getChildAt(table.indexOfChild(row) + 1);
 188                     TextView prev_amt =
 189                             (prev_row != null) ? (TextView) prev_row.getChildAt(1) : text_descr;
 190                     TextView next_acc =
 191                             (next_row != null) ? (TextView) next_row.getChildAt(0) : null;
 192
 193                     if (next_acc == null) {
 194                         prev_amt.setNextFocusRightId(R.id.none);
 195                         prev_amt.setNextFocusForwardId(R.id.none);
 196                         prev_amt.setImeOptions(EditorInfo.IME_ACTION_DONE);
 197                     }
 198                     else {
 199                         prev_amt.setNextFocusRightId(next_acc.getId());
 200                         prev_amt.setNextFocusForwardId(next_acc.getId());
 201                         prev_amt.setImeOptions(EditorInfo.IME_ACTION_NEXT);
 202                     }
 203
 204                     if (row.hasFocus()) {
 205                         if (next_acc != null) next_acc.requestFocus();
 206                         else prev_amt.requestFocus();
 207                     }
 208
 209                     table.removeView(row);
 210                     check_transaction_submittable();
 211 //                    Toast.makeText(NewTransactionActivity.this, "LEFT", Toast.LENGTH_LONG).show();
 212                 }
 213                 else {
 214                     Snackbar.make(table, R.string.msg_at_least_two_accounts_are_required, Snackbar.LENGTH_LONG)
 215                             .setAction("Action", null).show();
 216                 }
 217             }
 218 //            @Override
 219 //            public boolean performClick(View view, MotionEvent m) {
 220 //                return true;
 221 //            }
 222             public boolean onTouch(View view, MotionEvent m) {
 223                 return gestureDetector.onTouchEvent(m);
 224             }
 225         });
 226     }
 227
 228     private void hook_text_change_listener(final TextView view) {
 229         view.addTextChangedListener(new TextWatcher() {
 230             @Override
 231             public void beforeTextChanged(CharSequence s, int start, int count, int after) {
 232
 233             }
 234
 235             @Override
 236             public void onTextChanged(CharSequence s, int start, int before, int count) {
 237
 238             }
 239
 240             @Override
 241             public void afterTextChanged(Editable s) {
 242 //                Log.d("input", "text changed");
 243                 check_transaction_submittable();
 244             }
 245         });
 246
 247     }
 248
 249     @TargetApi(Build.VERSION_CODES.N)
 250     private void hook_autocompletion_adapter(final AutoCompleteTextView view, final String table, final String field) {
 251         String[] from = {field};
 252         int[] to = {android.R.id.text1};
 253         SimpleCursorAdapter adapter =
 254                 new SimpleCursorAdapter(this, android.R.layout.simple_dropdown_item_1line, null,
 255                         from, to, 0);
 256         adapter.setStringConversionColumn(1);
 257
 258         FilterQueryProvider provider = new FilterQueryProvider() {
 259             @Override
 260             public
 261             Cursor runQuery(CharSequence constraint) {
 262                 if (constraint == null) return null;
 263
 264                 String str = constraint.toString().toUpperCase();
 265                 Log.d("autocompletion", "Looking for " + str);
 266                 String[] col_names = {FontsContract.Columns._ID, field};
 267                 MatrixCursor c = new MatrixCursor(col_names);
 268
 269                 try (SQLiteDatabase db = MLDB.getReadableDatabase(getApplicationContext())) {
 270
 271                     try (Cursor matches = db.rawQuery(String.format(
 272                             "SELECT %s as a, case when %s_upper LIKE ?||'%%' then 1 "
 273                                     + "WHEN %s_upper LIKE '%%:'||?||'%%' then 2 "
 274                                     + "WHEN %s_upper LIKE '%% '||?||'%%' then 3 " + "else 9 end "
 275                                     + "FROM %s " + "WHERE %s_upper LIKE '%%'||?||'%%' "
 276                                     + "ORDER BY 2, 1;", field, field, field, field, table, field),
 277                             new String[]{str, str, str, str}))
 278                     {
 279                         int i = 0;
 280                         while (matches.moveToNext()) {
 281                             String match = matches.getString(0);
 282                             int order = matches.getInt(1);
 283                             Log.d("autocompletion", String.format("match: %s |%d", match, order));
 284                             c.newRow().add(i++).add(match);
 285                         }
 286                     }
 287
 288                     return c;
 289                 }
 290
 291             }
 292         };
 293
 294         adapter.setFilterQueryProvider(provider);
 295
 296         view.setAdapter(adapter);
 297     }
 298
 299     public boolean onCreateOptionsMenu(Menu menu) {
 300         // Inflate the menu; this adds items to the action bar if it is present.
 301         getMenuInflater().inflate(R.menu.new_transaction, menu);
 302         mSave = menu.findItem(R.id.action_submit_transaction);
 303         if (mSave == null) throw new AssertionError();
 304
 305         check_transaction_submittable();
 306
 307         return true;
 308     }
 309
 310     public void pickTransactionDate(View view) {
 311         DialogFragment picker = new DatePickerFragment();
 312         picker.show(getSupportFragmentManager(), "datePicker");
 313     }
 314
 315     public int dp2px(float dp) {
 316         return Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, getResources().getDisplayMetrics()));
 317     }
 318
 319     private void do_add_account_row(boolean focus) {
 320         final AutoCompleteTextView acc = new AutoCompleteTextView(this);
 321         acc.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT, 9f));
 322         acc.setHint(R.string.new_transaction_account_hint);
 323         acc.setWidth(0);
 324         acc.setImeOptions(EditorInfo.IME_ACTION_NEXT | EditorInfo.IME_FLAG_NO_ENTER_ACTION
 325                 | EditorInfo.IME_FLAG_NAVIGATE_NEXT);
 326         acc.setSingleLine(true);
 327
 328         final EditText amt = new EditText(this);
 329         amt.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.WRAP_CONTENT,
 330                 TableRow.LayoutParams.MATCH_PARENT, 1f));
 331         amt.setHint(R.string.new_transaction_amount_hint);
 332         amt.setWidth(0);
 333         amt.setInputType(InputType.TYPE_CLASS_NUMBER | InputType.TYPE_NUMBER_FLAG_SIGNED | 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, TableRow.LayoutParams.MATCH_PARENT));
 349         row.setGravity(Gravity.BOTTOM);
 350         row.addView(acc);
 351         row.addView(amt);
 352         table.addView(row);
 353
 354         if (focus) acc.requestFocus();
 355
 356         hook_swipe_listener(row);
 357         hook_autocompletion_adapter(acc, MLDB.ACCOUNTS_TABLE, "name");
 358         hook_text_change_listener(acc);
 359         hook_text_change_listener(amt);
 360     }
 361
 362     public void addTransactionAccountFromMenu(MenuItem item) {
 363         do_add_account_row(true);
 364     }
 365
 366     public
 367     void resetTransactionFromMenu(MenuItem item) {
 368         reset_form();
 369     }
 370
 371     public void saveTransactionFromMenu(MenuItem item) {
 372         save_transaction();
 373     }
 374
 375     private
 376     boolean is_zero(float f) {
 377         return (f < 0.005) && (f > -0.005);
 378     }
 379
 380     // rules:
 381     // 1) at least two account names
 382     // 2) each amount must have account name
 383     // 3) amounts must balance to 0, or
 384     // 3a) there must be exactly one empty amount
 385     // 4) empty accounts with empty amounts are ignored
 386     // 5) a row with an empty account name or empty amount is guaranteed to exist
 387     @SuppressLint("DefaultLocale")
 388     private void check_transaction_submittable() {
 389         TableLayout table = findViewById(R.id.new_transaction_accounts_table);
 390         int accounts = 0;
 391         int accounts_with_values = 0;
 392         int amounts = 0;
 393         int amounts_with_accounts = 0;
 394         int empty_rows = 0;
 395         TextView empty_amount = null;
 396         boolean single_empty_amount = false;
 397         boolean single_empty_amount_has_account = false;
 398         float running_total = 0f;
 399         boolean have_description =
 400                 !((TextView) findViewById(R.id.new_transaction_description)).getText().toString()
 401                         .isEmpty();
 402
 403         try {
 404             for (int i = 0; i < table.getChildCount(); i++) {
 405                 TableRow row = (TableRow) table.getChildAt(i);
 406
 407                 TextView acc_name_v = (TextView) row.getChildAt(0);
 408                 TextView amount_v = (TextView) row.getChildAt(1);
 409                 String amt = String.valueOf(amount_v.getText());
 410                 String acc_name = String.valueOf(acc_name_v.getText());
 411                 acc_name = acc_name.trim();
 412
 413                 if (!acc_name.isEmpty()) {
 414                     accounts++;
 415
 416                     if (!amt.isEmpty()) {
 417                         accounts_with_values++;
 418                     }
 419                 }
 420                 else empty_rows++;
 421
 422                 if (amt.isEmpty()) {
 423                     amount_v.setHint(String.format("%1.2f", 0f));
 424                     if (empty_amount == null) {
 425                         empty_amount = amount_v;
 426                         single_empty_amount = true;
 427                         single_empty_amount_has_account = !acc_name.isEmpty();
 428                     }
 429                     else if (!acc_name.isEmpty()) single_empty_amount = false;
 430                 }
 431                 else {
 432                     amounts++;
 433                     if (!acc_name.isEmpty()) amounts_with_accounts++;
 434                     running_total += Float.valueOf(amt);
 435                 }
 436             }
 437
 438             if ((empty_rows == 0) && ((table.getChildCount() == accounts) || (table.getChildCount()
 439                     == amounts)))
 440             {
 441                 do_add_account_row(false);
 442             }
 443
 444             Log.d("submittable", String.format("accounts=%d, accounts_with_values=%s, "
 445                             + "amounts_with_accounts=%d, amounts=%d, running_total=%1.2f, "
 446                             + "single_empty_with_acc=%s", accounts, accounts_with_values,
 447                     amounts_with_accounts, amounts, running_total,
 448                     (single_empty_amount && single_empty_amount_has_account) ? "true" : "false"));
 449
 450             if (have_description && (accounts >= 2) && (accounts_with_values >= (accounts - 1)) && (
 451                     amounts_with_accounts == amounts) && (
 452                     single_empty_amount && single_empty_amount_has_account || is_zero(
 453                             running_total)))
 454             {
 455                 if (mSave != null) mSave.setVisible(true);
 456             }
 457             else if (mSave != null) mSave.setVisible(false);
 458
 459             if (single_empty_amount) {
 460                 empty_amount
 461                         .setHint(String.format("%1.2f", (running_total > 0) ? -running_total : 0f));
 462             }
 463
 464         }
 465         catch (NumberFormatException e) {
 466             if (mSave != null) mSave.setVisible(false);
 467         }
 468         catch (Exception e) {
 469             e.printStackTrace();
 470             if (mSave != null) mSave.setVisible(false);
 471         }
 472     }
 473
 474     @Override
 475     public
 476     void done(String error) {
 477         progress.setVisibility(View.INVISIBLE);
 478         Log.d("visuals", "hiding progress");
 479
 480         if (error == null) reset_form();
 481         else Snackbar.make(findViewById(R.id.new_transaction_accounts_table), error,
 482                 BaseTransientBottomBar.LENGTH_LONG).show();
 483
 484         toggle_all_editing(true);
 485         check_transaction_submittable();
 486     }
 487
 488     private void reset_form() {
 489         text_date.setText("");
 490         text_descr.setText("");
 491
 492         text_descr.requestFocus();
 493
 494         while(table.getChildCount() > 2) {
 495             table.removeViewAt(2);
 496         }
 497         for( int i = 0; i < 2; i++ ) {
 498             TableRow tr = (TableRow) table.getChildAt(i);
 499             if ( tr == null) break;
 500
 501             ((TextView)tr.getChildAt(0)).setText("");
 502             ((TextView)tr.getChildAt(1)).setText("");
 503         }
 504     }
 505 }