aboutsummaryrefslogtreecommitdiff
path: root/src/qt/intro.cpp
blob: 964cfc8e982805a5b651a7ab6f24ca390fb94bb3 (plain)
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
// Copyright (c) 2011-2022 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#if defined(HAVE_CONFIG_H)
#include <config/bitcoin-config.h>
#endif

#include <chainparams.h>
#include <fs.h>
#include <qt/intro.h>
#include <qt/forms/ui_intro.h>

#include <qt/guiconstants.h>
#include <qt/guiutil.h>
#include <qt/optionsmodel.h>

#include <interfaces/node.h>
#include <util/fs_helpers.h>
#include <util/system.h>
#include <validation.h>

#include <QFileDialog>
#include <QSettings>
#include <QMessageBox>

#include <cmath>

/* Check free space asynchronously to prevent hanging the UI thread.

   Up to one request to check a path is in flight to this thread; when the check()
   function runs, the current path is requested from the associated Intro object.
   The reply is sent back through a signal.

   This ensures that no queue of checking requests is built up while the user is
   still entering the path, and that always the most recently entered path is checked as
   soon as the thread becomes available.
*/
class FreespaceChecker : public QObject
{
    Q_OBJECT

public:
    explicit FreespaceChecker(Intro *intro);

    enum Status {
        ST_OK,
        ST_ERROR
    };

public Q_SLOTS:
    void check();

Q_SIGNALS:
    void reply(int status, const QString &message, quint64 available);

private:
    Intro *intro;
};

#include <qt/intro.moc>

FreespaceChecker::FreespaceChecker(Intro *_intro)
{
    this->intro = _intro;
}

void FreespaceChecker::check()
{
    QString dataDirStr = intro->getPathToCheck();
    fs::path dataDir = GUIUtil::QStringToPath(dataDirStr);
    uint64_t freeBytesAvailable = 0;
    int replyStatus = ST_OK;
    QString replyMessage = tr("A new data directory will be created.");

    /* Find first parent that exists, so that fs::space does not fail */
    fs::path parentDir = dataDir;
    fs::path parentDirOld = fs::path();
    while(parentDir.has_parent_path() && !fs::exists(parentDir))
    {
        parentDir = parentDir.parent_path();

        /* Check if we make any progress, break if not to prevent an infinite loop here */
        if (parentDirOld == parentDir)
            break;

        parentDirOld = parentDir;
    }

    try {
        freeBytesAvailable = fs::space(parentDir).available;
        if(fs::exists(dataDir))
        {
            if(fs::is_directory(dataDir))
            {
                QString separator = "<code>" + QDir::toNativeSeparators("/") + tr("name") + "</code>";
                replyStatus = ST_OK;
                replyMessage = tr("Directory already exists. Add %1 if you intend to create a new directory here.").arg(separator);
            } else {
                replyStatus = ST_ERROR;
                replyMessage = tr("Path already exists, and is not a directory.");
            }
        }
    } catch (const fs::filesystem_error&)
    {
        /* Parent directory does not exist or is not accessible */
        replyStatus = ST_ERROR;
        replyMessage = tr("Cannot create data directory here.");
    }
    Q_EMIT reply(replyStatus, replyMessage, freeBytesAvailable);
}

namespace {
//! Return pruning size that will be used if automatic pruning is enabled.
int GetPruneTargetGB()
{
    int64_t prune_target_mib = gArgs.GetIntArg("-prune", 0);
    // >1 means automatic pruning is enabled by config, 1 means manual pruning, 0 means no pruning.
    return prune_target_mib > 1 ? PruneMiBtoGB(prune_target_mib) : DEFAULT_PRUNE_TARGET_GB;
}
} // namespace

Intro::Intro(QWidget *parent, int64_t blockchain_size_gb, int64_t chain_state_size_gb) :
    QDialog(parent, GUIUtil::dialog_flags),
    ui(new Ui::Intro),
    m_blockchain_size_gb(blockchain_size_gb),
    m_chain_state_size_gb(chain_state_size_gb),
    m_prune_target_gb{GetPruneTargetGB()}
{
    ui->setupUi(this);
    ui->welcomeLabel->setText(ui->welcomeLabel->text().arg(PACKAGE_NAME));
    ui->storageLabel->setText(ui->storageLabel->text().arg(PACKAGE_NAME));

    ui->lblExplanation1->setText(ui->lblExplanation1->text()
        .arg(PACKAGE_NAME)
        .arg(m_blockchain_size_gb)
        .arg(2009)
        .arg(tr("Bitcoin"))
    );
    ui->lblExplanation2->setText(ui->lblExplanation2->text().arg(PACKAGE_NAME));

    const int min_prune_target_GB = std::ceil(MIN_DISK_SPACE_FOR_BLOCK_FILES / 1e9);
    ui->pruneGB->setRange(min_prune_target_GB, std::numeric_limits<int>::max());
    if (gArgs.GetIntArg("-prune", 0) > 1) { // -prune=1 means enabled, above that it's a size in MiB
        ui->prune->setChecked(true);
        ui->prune->setEnabled(false);
    }
    ui->pruneGB->setValue(m_prune_target_gb);
    ui->pruneGB->setToolTip(ui->prune->toolTip());
    ui->lblPruneSuffix->setToolTip(ui->prune->toolTip());
    UpdatePruneLabels(ui->prune->isChecked());

    connect(ui->prune, &QCheckBox::toggled, [this](bool prune_checked) {
        UpdatePruneLabels(prune_checked);
        UpdateFreeSpaceLabel();
    });
    connect(ui->pruneGB, qOverload<int>(&QSpinBox::valueChanged), [this](int prune_GB) {
        m_prune_target_gb = prune_GB;
        UpdatePruneLabels(ui->prune->isChecked());
        UpdateFreeSpaceLabel();
    });

    startThread();
}

Intro::~Intro()
{
    delete ui;
    /* Ensure thread is finished before it is deleted */
    thread->quit();
    thread->wait();
}

QString Intro::getDataDirectory()
{
    return ui->dataDirectory->text();
}

void Intro::setDataDirectory(const QString &dataDir)
{
    ui->dataDirectory->setText(dataDir);
    if(dataDir == GUIUtil::getDefaultDataDirectory())
    {
        ui->dataDirDefault->setChecked(true);
        ui->dataDirectory->setEnabled(false);
        ui->ellipsisButton->setEnabled(false);
    } else {
        ui->dataDirCustom->setChecked(true);
        ui->dataDirectory->setEnabled(true);
        ui->ellipsisButton->setEnabled(true);
    }
}

int64_t Intro::getPruneMiB() const
{
    switch (ui->prune->checkState()) {
    case Qt::Checked:
        return PruneGBtoMiB(m_prune_target_gb);
    case Qt::Unchecked: default:
        return 0;
    }
}

bool Intro::showIfNeeded(bool& did_show_intro, int64_t& prune_MiB)
{
    did_show_intro = false;

    QSettings settings;
    /* If data directory provided on command line, no need to look at settings
       or show a picking dialog */
    if(!gArgs.GetArg("-datadir", "").empty())
        return true;
    /* 1) Default data directory for operating system */
    QString dataDir = GUIUtil::getDefaultDataDirectory();
    /* 2) Allow QSettings to override default dir */
    dataDir = settings.value("strDataDir", dataDir).toString();

    if(!fs::exists(GUIUtil::QStringToPath(dataDir)) || gArgs.GetBoolArg("-choosedatadir", DEFAULT_CHOOSE_DATADIR) || settings.value("fReset", false).toBool() || gArgs.GetBoolArg("-resetguisettings", false))
    {
        /* Use selectParams here to guarantee Params() can be used by node interface */
        try {
            SelectParams(gArgs.GetChainName());
        } catch (const std::exception&) {
            return false;
        }

        /* If current default data directory does not exist, let the user choose one */
        Intro intro(nullptr, Params().AssumedBlockchainSize(), Params().AssumedChainStateSize());
        intro.setDataDirectory(dataDir);
        intro.setWindowIcon(QIcon(":icons/bitcoin"));
        did_show_intro = true;

        while(true)
        {
            if(!intro.exec())
            {
                /* Cancel clicked */
                return false;
            }
            dataDir = intro.getDataDirectory();
            try {
                if (TryCreateDirectories(GUIUtil::QStringToPath(dataDir))) {
                    // If a new data directory has been created, make wallets subdirectory too
                    TryCreateDirectories(GUIUtil::QStringToPath(dataDir) / "wallets");
                }
                break;
            } catch (const fs::filesystem_error&) {
                QMessageBox::critical(nullptr, PACKAGE_NAME,
                    tr("Error: Specified data directory \"%1\" cannot be created.").arg(dataDir));
                /* fall through, back to choosing screen */
            }
        }

        // Additional preferences:
        prune_MiB = intro.getPruneMiB();

        settings.setValue("strDataDir", dataDir);
        settings.setValue("fReset", false);
    }
    /* Only override -datadir if different from the default, to make it possible to
     * override -datadir in the bitcoin.conf file in the default data directory
     * (to be consistent with bitcoind behavior)
     */
    if(dataDir != GUIUtil::getDefaultDataDirectory()) {
        gArgs.SoftSetArg("-datadir", fs::PathToString(GUIUtil::QStringToPath(dataDir))); // use OS locale for path setting
    }
    return true;
}

void Intro::setStatus(int status, const QString &message, quint64 bytesAvailable)
{
    switch(status)
    {
    case FreespaceChecker::ST_OK:
        ui->errorMessage->setText(message);
        ui->errorMessage->setStyleSheet("");
        break;
    case FreespaceChecker::ST_ERROR:
        ui->errorMessage->setText(tr("Error") + ": " + message);
        ui->errorMessage->setStyleSheet("QLabel { color: #800000 }");
        break;
    }
    /* Indicate number of bytes available */
    if(status == FreespaceChecker::ST_ERROR)
    {
        ui->freeSpace->setText("");
    } else {
        m_bytes_available = bytesAvailable;
        if (ui->prune->isEnabled() && !(gArgs.IsArgSet("-prune") && gArgs.GetIntArg("-prune", 0) == 0)) {
            ui->prune->setChecked(m_bytes_available < (m_blockchain_size_gb + m_chain_state_size_gb + 10) * GB_BYTES);
        }
        UpdateFreeSpaceLabel();
    }
    /* Don't allow confirm in ERROR state */
    ui->buttonBox->button(QDialogButtonBox::Ok)->setEnabled(status != FreespaceChecker::ST_ERROR);
}

void Intro::UpdateFreeSpaceLabel()
{
    QString freeString = tr("%n GB of space available", "", m_bytes_available / GB_BYTES);
    if (m_bytes_available < m_required_space_gb * GB_BYTES) {
        freeString += " " + tr("(of %n GB needed)", "", m_required_space_gb);
        ui->freeSpace->setStyleSheet("QLabel { color: #800000 }");
    } else if (m_bytes_available / GB_BYTES - m_required_space_gb < 10) {
        freeString += " " + tr("(%n GB needed for full chain)", "", m_required_space_gb);
        ui->freeSpace->setStyleSheet("QLabel { color: #999900 }");
    } else {
        ui->freeSpace->setStyleSheet("");
    }
    ui->freeSpace->setText(freeString + ".");
}

void Intro::on_dataDirectory_textChanged(const QString &dataDirStr)
{
    /* Disable OK button until check result comes in */
    ui->buttonBox->button(QDialogButtonBox::Ok)->setEnabled(false);
    checkPath(dataDirStr);
}

void Intro::on_ellipsisButton_clicked()
{
    QString dir = QDir::toNativeSeparators(QFileDialog::getExistingDirectory(nullptr, "Choose data directory", ui->dataDirectory->text()));
    if(!dir.isEmpty())
        ui->dataDirectory->setText(dir);
}

void Intro::on_dataDirDefault_clicked()
{
    setDataDirectory(GUIUtil::getDefaultDataDirectory());
}

void Intro::on_dataDirCustom_clicked()
{
    ui->dataDirectory->setEnabled(true);
    ui->ellipsisButton->setEnabled(true);
}

void Intro::startThread()
{
    thread = new QThread(this);
    FreespaceChecker *executor = new FreespaceChecker(this);
    executor->moveToThread(thread);

    connect(executor, &FreespaceChecker::reply, this, &Intro::setStatus);
    connect(this, &Intro::requestCheck, executor, &FreespaceChecker::check);
    /*  make sure executor object is deleted in its own thread */
    connect(thread, &QThread::finished, executor, &QObject::deleteLater);

    thread->start();
}

void Intro::checkPath(const QString &dataDir)
{
    mutex.lock();
    pathToCheck = dataDir;
    if(!signalled)
    {
        signalled = true;
        Q_EMIT requestCheck();
    }
    mutex.unlock();
}

QString Intro::getPathToCheck()
{
    QString retval;
    mutex.lock();
    retval = pathToCheck;
    signalled = false; /* new request can be queued now */
    mutex.unlock();
    return retval;
}

void Intro::UpdatePruneLabels(bool prune_checked)
{
    m_required_space_gb = m_blockchain_size_gb + m_chain_state_size_gb;
    QString storageRequiresMsg = tr("At least %1 GB of data will be stored in this directory, and it will grow over time.");
    if (prune_checked && m_prune_target_gb <= m_blockchain_size_gb) {
        m_required_space_gb = m_prune_target_gb + m_chain_state_size_gb;
        storageRequiresMsg = tr("Approximately %1 GB of data will be stored in this directory.");
    }
    ui->lblExplanation3->setVisible(prune_checked);
    ui->pruneGB->setEnabled(prune_checked);
    static constexpr uint64_t nPowTargetSpacing = 10 * 60;  // from chainparams, which we don't have at this stage
    static constexpr uint32_t expected_block_data_size = 2250000;  // includes undo data
    const uint64_t expected_backup_days = m_prune_target_gb * 1e9 / (uint64_t(expected_block_data_size) * 86400 / nPowTargetSpacing);
    ui->lblPruneSuffix->setText(
        //: Explanatory text on the capability of the current prune target.
        tr("(sufficient to restore backups %n day(s) old)", "", expected_backup_days));
    ui->sizeWarningLabel->setText(
        tr("%1 will download and store a copy of the Bitcoin block chain.").arg(PACKAGE_NAME) + " " +
        storageRequiresMsg.arg(m_required_space_gb) + " " +
        tr("The wallet will also be stored in this directory.")
    );
    this->adjustSize();
}