Repository navigation
Expand file tree
/
Copy pathExportDataDialog.cpp
More file actions
573 lines (498 loc) · 19.9 KB
/
Copy pathExportDataDialog.cpp
File metadata and controls
573 lines (498 loc) · 19.9 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
#include "ExportDataDialog.h"
#include "ui_ExportDataDialog.h"
#include "sqlitedb.h"
#include "Settings.h"
#include "sqlite.h"
#include "FileDialog.h"
#include <QFile>
#include <QTextStream>
#include <QMessageBox>
#include <QJsonDocument>
#include <QJsonArray>
#include <QJsonObject>
#include <QTextCodec>
ExportDataDialog::ExportDataDialog(DBBrowserDB& db, ExportFormats format, QWidget* parent, const QString& query, const sqlb::ObjectIdentifier& selection)
: QDialog(parent),
ui(new Ui::ExportDataDialog),
pdb(db),
m_format(format),
m_sQuery(query)
{
// Create UI
ui->setupUi(this);
// Show different option widgets depending on the export format
ui->stackFormat->setCurrentIndex(format);
if(format == ExportFormatJson) {
setWindowTitle(tr("Export data as JSON"));
}
// Retrieve the saved dialog preferences
ui->checkHeader->setChecked(Settings::getValue("exportcsv", "firstrowheader").toBool());
setSeparatorChar(Settings::getValue("exportcsv", "separator").toInt());
setQuoteChar(Settings::getValue("exportcsv", "quotecharacter").toInt());
setNewLineString(Settings::getValue("exportcsv", "newlinecharacters").toString());
ui->checkPrettyPrint->setChecked(Settings::getValue("exportjson", "prettyprint").toBool());
// Update the visible/hidden status of the "Other" line edit fields
showCustomCharEdits();
// If a SQL query was specified hide the table combo box. If not fill it with tables to export
if(query.isEmpty())
{
// Get list of tables to export
for(auto it=pdb.schemata.constBegin();it!=pdb.schemata.constEnd();++it)
{
QList<sqlb::ObjectPtr> tables = it->values("table") + it->values("view");
for(auto jt=tables.constBegin();jt!=tables.constEnd();++jt)
{
sqlb::ObjectIdentifier obj(it.key(), (*jt)->name());
QListWidgetItem* item = new QListWidgetItem(QIcon(QString(":icons/%1").arg(sqlb::Object::typeToString((*jt)->type()))), obj.toDisplayString());
item->setData(Qt::UserRole, obj.toVariant());
ui->listTables->addItem(item);
}
}
// Sort list of tables and select the table specified in the selection parameter or alternatively the first one
ui->listTables->model()->sort(0);
if(selection.isEmpty())
{
ui->listTables->setCurrentItem(ui->listTables->item(0));
} else {
for(int i=0;i<ui->listTables->count();i++)
{
if(sqlb::ObjectIdentifier(ui->listTables->item(i)->data(Qt::UserRole)) == selection)
{
ui->listTables->setCurrentRow(i);
break;
}
}
}
} else {
// Hide table combo box
ui->labelTable->setVisible(false);
ui->listTables->setVisible(false);
resize(minimumSize());
}
}
ExportDataDialog::~ExportDataDialog()
{
delete ui;
}
bool ExportDataDialog::exportQuery(const QString& sQuery, const QString& sFilename)
{
switch(m_format)
{
case ExportFormatCsv:
return exportQueryCsv(sQuery, sFilename);
case ExportFormatJson:
return exportQueryJson(sQuery, sFilename);
default:
return false;
}
}
bool ExportDataDialog::exportQueryCsv(const QString& sQuery, const QString& sFilename)
{
// Prepare the quote and separating characters
QChar quoteChar = currentQuoteChar();
QString quotequoteChar = QString(quoteChar) + quoteChar;
QChar sepChar = currentSeparatorChar();
QString newlineStr = currentNewLineString();
// Chars that require escaping
std::string special_chars = newlineStr.toStdString() + sepChar.toLatin1() + quoteChar.toLatin1();
// Open file
QFile file(sFilename);
if(file.open(QIODevice::WriteOnly))
{
// Open text stream to the file
QTextStream stream(&file);
QByteArray utf8Query = sQuery.toUtf8();
sqlite3_stmt *stmt;
auto pDb = pdb.get(tr("exporting CSV"));
int status = sqlite3_prepare_v2(pDb.get(), utf8Query.data(), utf8Query.size(), &stmt, nullptr);
if(SQLITE_OK == status)
{
if(ui->checkHeader->isChecked())
{
int columns = sqlite3_column_count(stmt);
for (int i = 0; i < columns; ++i)
{
QString content = QString::fromUtf8(sqlite3_column_name(stmt, i));
if(content.toStdString().find_first_of(special_chars) != std::string::npos)
stream << quoteChar << content.replace(quoteChar, quotequoteChar) << quoteChar;
else
stream << content;
if(i != columns - 1)
// Only output the separator value if sepChar isn't 0,
// as that's used to indicate no separator character
// should be used
if(!sepChar.isNull())
stream << sepChar;
}
stream << newlineStr;
}
QApplication::setOverrideCursor(Qt::WaitCursor);
int columns = sqlite3_column_count(stmt);
size_t counter = 0;
while(sqlite3_step(stmt) == SQLITE_ROW)
{
for (int i = 0; i < columns; ++i)
{
QString content = QString::fromUtf8(
reinterpret_cast<const char*>(sqlite3_column_blob(stmt, i)),
sqlite3_column_bytes(stmt, i));
// If no quote char is set but the content contains a line break, we enforce some quote characters. This probably isn't entirely correct
// but still better than having the line breaks unquoted and effectively outputting a garbage file.
if(quoteChar.isNull() && content.contains(newlineStr))
stream << '"' << content.replace('"', "\"\"") << '"';
// If the content needs to be quoted, quote it. But only if a quote char has been specified
else if(!quoteChar.isNull() && content.toStdString().find_first_of(special_chars) != std::string::npos)
stream << quoteChar << content.replace(quoteChar, quotequoteChar) << quoteChar;
// If it doesn't need to be quoted, don't quote it
else
stream << content;
if(i != columns - 1)
// Only output the separator value if sepChar isn't 0,
// as that's used to indicate no separator character
// should be used
if(!sepChar.isNull())
stream << sepChar;
}
stream << newlineStr;
if(counter % 1000 == 0)
qApp->processEvents();
counter++;
}
}
sqlite3_finalize(stmt);
QApplication::restoreOverrideCursor();
qApp->processEvents();
// Done writing the file
file.close();
} else {
QMessageBox::warning(this, QApplication::applicationName(),
tr("Could not open output file: %1").arg(sFilename));
return false;
}
return true;
}
bool ExportDataDialog::exportQueryJson(const QString& sQuery, const QString& sFilename)
{
// Open file
QFile file(sFilename);
if(file.open(QIODevice::WriteOnly))
{
QByteArray utf8Query = sQuery.toUtf8();
sqlite3_stmt *stmt;
auto pDb = pdb.get(tr("exporting JSON"));
int status = sqlite3_prepare_v2(pDb.get(), utf8Query.data(), utf8Query.size(), &stmt, nullptr);
QJsonArray json_table;
if(SQLITE_OK == status)
{
QApplication::setOverrideCursor(Qt::WaitCursor);
int columns = sqlite3_column_count(stmt);
size_t counter = 0;
QList<QString> column_names;
while(sqlite3_step(stmt) == SQLITE_ROW)
{
// Get column names if we didn't do so before
if(!column_names.size())
{
for(int i=0;i<columns;++i)
column_names.push_back(QString::fromUtf8(sqlite3_column_name(stmt, i)));
}
QJsonObject json_row;
for(int i=0;i<columns;++i)
{
int type = sqlite3_column_type(stmt, i);
switch (type) {
case SQLITE_INTEGER: {
qint64 content = sqlite3_column_int64(stmt, i);
json_row.insert(column_names[i], content);
break;
}
case SQLITE_FLOAT: {
double content = sqlite3_column_double(stmt, i);
json_row.insert(column_names[i], content);
break;
}
case SQLITE_NULL: {
json_row.insert(column_names[i], QJsonValue());
break;
}
case SQLITE_TEXT: {
QString content = QString::fromUtf8(
reinterpret_cast<const char*>(sqlite3_column_text(stmt, i)),
sqlite3_column_bytes(stmt, i));
json_row.insert(column_names[i], content);
break;
}
case SQLITE_BLOB: {
QByteArray content(reinterpret_cast<const char*>(sqlite3_column_blob(stmt, i)),
sqlite3_column_bytes(stmt, i));
QTextCodec *codec = QTextCodec::codecForName("UTF-8");
QString string = codec->toUnicode(content.toBase64(QByteArray::Base64Encoding));
json_row.insert(column_names[i], string);
break;
}
}
}
json_table.push_back(json_row);
if(counter % 1000 == 0)
qApp->processEvents();
counter++;
}
}
sqlite3_finalize(stmt);
// Create JSON document
QJsonDocument json_doc;
json_doc.setArray(json_table);
file.write(json_doc.toJson(ui->checkPrettyPrint->isChecked() ? QJsonDocument::Indented : QJsonDocument::Compact));
QApplication::restoreOverrideCursor();
qApp->processEvents();
// Done writing the file
file.close();
} else {
QMessageBox::warning(this, QApplication::applicationName(),
tr("Could not open output file: %1").arg(sFilename));
return false;
}
return true;
}
void ExportDataDialog::accept()
{
QString file_dialog_filter;
QString default_file_extension;
switch(m_format)
{
case ExportFormatCsv:
file_dialog_filter = tr("Text files(*.csv *.txt)");
default_file_extension = ".csv";
break;
case ExportFormatJson:
file_dialog_filter = tr("Text files(*.json *.js *.txt)");
default_file_extension = ".json";
break;
}
if(!m_sQuery.isEmpty())
{
// called from sqlexecute query tab
QString sFilename = FileDialog::getSaveFileName(
CreateDataFile,
this,
tr("Choose a filename to export data"),
file_dialog_filter);
if(sFilename.isEmpty())
{
close();
return;
}
exportQuery(m_sQuery, sFilename);
} else {
// called from the File export menu
QList<QListWidgetItem*> selectedItems = ui->listTables->selectedItems();
if(selectedItems.isEmpty())
{
QMessageBox::warning(this, QApplication::applicationName(),
tr("Please select at least 1 table."));
return;
}
// Get filename
QStringList filenames;
if(selectedItems.size() == 1)
{
QString fileName = FileDialog::getSaveFileName(
CreateDataFile,
this,
tr("Choose a filename to export data"),
file_dialog_filter,
selectedItems.at(0)->text() + default_file_extension);
if(fileName.isEmpty())
{
close();
return;
}
filenames << fileName;
} else {
// ask for folder
QString exportfolder = FileDialog::getExistingDirectory(
CreateDataFile,
this,
tr("Choose a directory"),
QFileDialog::ShowDirsOnly | QFileDialog::DontResolveSymlinks);
if(exportfolder.isEmpty())
{
close();
return;
}
for(const QListWidgetItem* item : selectedItems)
filenames << QDir(exportfolder).filePath(item->text() + default_file_extension);
}
// Only if the user hasn't clicked the cancel button
for(int i = 0; i < selectedItems.size(); ++i)
{
// if we are called from execute sql tab, query is already set
// and we only export 1 select
QString sQuery = QString("SELECT * FROM %1;").arg(sqlb::ObjectIdentifier(selectedItems.at(i)->data(Qt::UserRole)).toString());
exportQuery(sQuery, filenames.at(i));
}
}
// Save the dialog preferences for future use
Settings::setValue("exportcsv", "firstrowheader", ui->checkHeader->isChecked());
Settings::setValue("exportjson", "prettyprint", ui->checkPrettyPrint->isChecked());
Settings::setValue("exportcsv", "separator", currentSeparatorChar());
Settings::setValue("exportcsv", "quotecharacter", currentQuoteChar());
Settings::setValue("exportcsv", "newlinecharacters", currentNewLineString());
// Notify the user the export has completed
QMessageBox::information(this, QApplication::applicationName(), tr("Export completed."));
QDialog::accept();
}
void ExportDataDialog::showCustomCharEdits()
{
// Retrieve selection info for the quote, separator, and newline widgets
int quoteIndex = ui->comboQuoteCharacter->currentIndex();
int quoteCount = ui->comboQuoteCharacter->count();
int sepIndex = ui->comboFieldSeparator->currentIndex();
int sepCount = ui->comboFieldSeparator->count();
int newLineIndex = ui->comboNewLineString->currentIndex();
int newLineCount = ui->comboNewLineString->count();
// Determine which will have their 'Other' line edit widget visible
bool quoteVisible = quoteIndex == (quoteCount - 1);
bool sepVisible = sepIndex == (sepCount - 1);
bool newLineVisible = newLineIndex == (newLineCount - 1);
// Update the visibility of the 'Other' line edit widgets
ui->editCustomQuote->setVisible(quoteVisible);
ui->editCustomSeparator->setVisible(sepVisible);
ui->editCustomNewLine->setVisible(newLineVisible);
}
void ExportDataDialog::setQuoteChar(const QChar& c)
{
QComboBox* combo = ui->comboQuoteCharacter;
// Set the combo and/or Other box to the correct selection
switch (c.toLatin1()) {
case '"':
combo->setCurrentIndex(0); // First option is a quote character
break;
case '\'':
combo->setCurrentIndex(1); // Second option is a single quote character
break;
case 0:
combo->setCurrentIndex(2); // Third option is blank (no character)
break;
default:
// For everything else, set the combo box to option 3 ('Other') and
// place the desired string into the matching edit line box
combo->setCurrentIndex(3);
if(!c.isNull())
{
// Don't set it if/when it's the 0 flag value
ui->editCustomQuote->setText(c);
}
break;
}
}
char ExportDataDialog::currentQuoteChar() const
{
QComboBox* combo = ui->comboQuoteCharacter;
switch (combo->currentIndex()) {
case 0:
return '"'; // First option is a quote character
case 1:
return '\''; // Second option is a single quote character
case 2:
return 0; // Third option is a blank (no character)
default:
// The 'Other' option was selected, so check if the matching edit
// line widget contains something
int customQuoteLength = ui->editCustomQuote->text().length();
if (customQuoteLength > 0) {
// Yes it does. Return its first character
char customQuoteChar = ui->editCustomQuote->text().at(0).toLatin1();
return customQuoteChar;
} else {
// No it doesn't, so return 0 to indicate it was empty
return 0;
}
}
}
void ExportDataDialog::setSeparatorChar(const QChar& c)
{
QComboBox* combo = ui->comboFieldSeparator;
// Set the combo and/or Other box to the correct selection
switch (c.toLatin1()) {
case ',':
combo->setCurrentIndex(0); // First option is a comma character
break;
case ';':
combo->setCurrentIndex(1); // Second option is a semi-colon character
break;
case '\t':
combo->setCurrentIndex(2); // Third option is a tab character
break;
case '|':
combo->setCurrentIndex(3); // Fourth option is a pipe symbol
break;
default:
// For everything else, set the combo box to option 3 ('Other') and
// place the desired string into the matching edit line box
combo->setCurrentIndex(4);
// Only put the separator character in the matching line edit box if
// it's not the flag value of 0, which is for indicating its empty
if(!c.isNull())
ui->editCustomSeparator->setText(c);
break;
}
}
char ExportDataDialog::currentSeparatorChar() const
{
QComboBox* combo = ui->comboFieldSeparator;
switch (combo->currentIndex()) {
case 0:
return ','; // First option is a comma character
case 1:
return ';'; // Second option is a semi-colon character
case 2:
return '\t'; // Third option is a tab character
case 3:
return '|'; // Fourth option is a pipe character
default:
// The 'Other' option was selected, so check if the matching edit
// line widget contains something
int customSeparatorLength = ui->editCustomSeparator->text().length();
if (customSeparatorLength > 0) {
// Yes it does. Return its first character
char customSeparatorChar = ui->editCustomSeparator->text().at(0).toLatin1();
return customSeparatorChar;
} else {
// No it doesn't, so return 0 to indicate it was empty
return 0;
}
}
}
void ExportDataDialog::setNewLineString(const QString& s)
{
QComboBox* combo = ui->comboNewLineString;
// Set the combo and/or Other box to the correct selection
if (s == "\r\n") {
// For Windows style newlines, set the combo box to option 0
combo->setCurrentIndex(0);
} else if (s == "\n") {
// For Unix style newlines, set the combo box to option 1
combo->setCurrentIndex(1);
} else {
// For everything else, set the combo box to option 2 ('Other') and
// place the desired string into the matching edit line box
combo->setCurrentIndex(2);
ui->editCustomNewLine->setText(s);
}
}
QString ExportDataDialog::currentNewLineString() const
{
QComboBox* combo = ui->comboNewLineString;
switch (combo->currentIndex()) {
case 0:
// Windows style newlines
return QString("\r\n");
case 1:
// Unix style newlines
return QString("\n");
default:
// Return the text from the 'Other' box
return QString(ui->editCustomNewLine->text().toLatin1());
}
}