Add db statistic output to CLI db-info command.

Closes #6920

8 files changed, 294 insertions, 126 deletions

diff --git a/share/translations/keepassxc_en.ts b/share/translations/keepassxc_en.ts
index 2ea2c0f72..4f11ecb83 100644
--- a/share/translations/keepassxc_en.ts
+++ b/share/translations/keepassxc_en.ts
@@ -7561,6 +7561,74 @@ Please consider generating a new key file.</source>
         <source>Use custom character set</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Location</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Database created</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Last saved</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Unsaved changes</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>yes</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>no</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Number of groups</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Number of entries</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Number of expired entries</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Unique passwords</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Non-unique passwords</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Maximum password reuse</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Number of short passwords</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Number of weak passwords</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Entries excluded from reports</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>Average password length</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <source>%1 characters</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>QtIOCompressor</name>
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index a6dcd8e97..e9a07073f 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -39,6 +39,7 @@ set(keepassx_SOURCES
         core/Config.cpp
         core/CustomData.cpp
         core/Database.cpp
+        core/DatabaseStats.cpp
         core/Entry.cpp
         core/EntryAttachments.cpp
         core/EntryAttributes.cpp
diff --git a/src/cli/Info.cpp b/src/cli/Info.cpp
index 4338cd000..bf093664a 100644
--- a/src/cli/Info.cpp
+++ b/src/cli/Info.cpp
@@ -18,7 +18,9 @@
 #include "Info.h"
 
 #include "Utils.h"
+#include "core/DatabaseStats.h"
 #include "core/Global.h"
+#include "core/Group.h"
 #include "core/Metadata.h"
 
 #include <QCommandLineParser>
@@ -47,5 +49,25 @@ int Info::executeWithDatabase(QSharedPointer<Database> database, QSharedPointer<
     } else {
         out << QObject::tr("Recycle bin is not enabled.") << endl;
     }
+
+    DatabaseStats stats(database);
+    out << QObject::tr("Location") << ": " << database->filePath() << endl;
+    out << QObject::tr("Database created") << ": "
+        << database->rootGroup()->timeInfo().creationTime().toString(Qt::DefaultLocaleShortDate) << endl;
+    out << QObject::tr("Last saved") << ": " << stats.modified.toString(Qt::DefaultLocaleShortDate) << endl;
+    out << QObject::tr("Unsaved changes") << ": " << (database->isModified() ? QObject::tr("yes") : QObject::tr("no"))
+        << endl;
+    out << QObject::tr("Number of groups") << ": " << QString::number(stats.groupCount) << endl;
+    out << QObject::tr("Number of entries") << ": " << QString::number(stats.entryCount) << endl;
+    out << QObject::tr("Number of expired entries") << ": " << QString::number(stats.expiredEntries) << endl;
+    out << QObject::tr("Unique passwords") << ": " << QString::number(stats.uniquePasswords) << endl;
+    out << QObject::tr("Non-unique passwords") << ": " << QString::number(stats.reusedPasswords) << endl;
+    out << QObject::tr("Maximum password reuse") << ": " << QString::number(stats.maxPwdReuse()) << endl;
+    out << QObject::tr("Number of short passwords") << ": " << QString::number(stats.shortPasswords) << endl;
+    out << QObject::tr("Number of weak passwords") << ": " << QString::number(stats.weakPasswords) << endl;
+    out << QObject::tr("Entries excluded from reports") << ": " << QString::number(stats.excludedEntries) << endl;
+    out << QObject::tr("Average password length") << ": " << QObject::tr("%1 characters").arg(stats.averagePwdLength())
+        << endl;
+
     return EXIT_SUCCESS;
 }
diff --git a/src/core/DatabaseStats.cpp b/src/core/DatabaseStats.cpp
new file mode 100644
index 000000000..cf2364b08
--- /dev/null
+++ b/src/core/DatabaseStats.cpp
@@ -0,0 +1,119 @@
+/*
+ *  Copyright (C) 2021 KeePassXC Team <team@keepassxc.org>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 2 or (at your option)
+ *  version 3 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "DatabaseStats.h"
+
+// Ctor does all the work
+DatabaseStats::DatabaseStats(QSharedPointer<Database> db)
+    : modified(QFileInfo(db->filePath()).lastModified())
+    , m_db(db)
+{
+    gatherStats(db->rootGroup()->groupsRecursive(true));
+}
+
+// Get average password length
+int DatabaseStats::averagePwdLength() const
+{
+    const auto passwords = uniquePasswords + reusedPasswords;
+    return passwords == 0 ? 0 : std::round(totalPasswordLength / double(passwords));
+}
+
+// Get max number of password reuse (=how many entries
+// share the same password)
+int DatabaseStats::maxPwdReuse() const
+{
+    int ret = 0;
+    for (const auto& count : m_passwords) {
+        ret = std::max(ret, count);
+    }
+    return ret;
+}
+
+// A warning sign is displayed if one of the
+// following returns true.
+bool DatabaseStats::isAnyExpired() const
+{
+    return expiredEntries > 0;
+}
+
+bool DatabaseStats::areTooManyPwdsReused() const
+{
+    return reusedPasswords > uniquePasswords / 10;
+}
+
+bool DatabaseStats::arePwdsReusedTooOften() const
+{
+    return maxPwdReuse() > 3;
+}
+
+bool DatabaseStats::isAvgPwdTooShort() const
+{
+    return averagePwdLength() < 10;
+}
+
+void DatabaseStats::gatherStats(const QList<Group*>& groups)
+{
+    auto checker = HealthChecker(m_db);
+
+    for (const auto* group : groups) {
+        // Don't count anything in the recycle bin
+        if (group->isRecycled()) {
+            continue;
+        }
+
+        ++groupCount;
+
+        for (const auto* entry : group->entries()) {
+            // Don't count anything in the recycle bin
+            if (entry->isRecycled()) {
+                continue;
+            }
+
+            ++entryCount;
+
+            if (entry->isExpired()) {
+                ++expiredEntries;
+            }
+
+            // Get password statistics
+            const auto pwd = entry->password();
+            if (!pwd.isEmpty()) {
+                if (!m_passwords.contains(pwd)) {
+                    ++uniquePasswords;
+                } else {
+                    ++reusedPasswords;
+                }
+
+                if (pwd.size() < PasswordHealth::Length::Short) {
+                    ++shortPasswords;
+                }
+
+                // Speed up Zxcvbn process by excluding very long passwords and most passphrases
+                if (pwd.size() < PasswordHealth::Length::Long
+                    && checker.evaluate(entry)->quality() <= PasswordHealth::Quality::Weak) {
+                    ++weakPasswords;
+                }
+
+                if (entry->excludeFromReports()) {
+                    ++excludedEntries;
+                }
+
+                totalPasswordLength += pwd.size();
+                m_passwords[pwd]++;
+            }
+        }
+    }
+}
diff --git a/src/core/DatabaseStats.h b/src/core/DatabaseStats.h
new file mode 100644
index 000000000..2c0ad7c76
--- /dev/null
+++ b/src/core/DatabaseStats.h
@@ -0,0 +1,59 @@
+/*
+ *  Copyright (C) 2021 KeePassXC Team <team@keepassxc.org>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 2 or (at your option)
+ *  version 3 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef KEEPASSXC_DATABASESTATS_H
+#define KEEPASSXC_DATABASESTATS_H
+#include "PasswordHealth.h"
+#include "core/Group.h"
+#include <QFileInfo>
+#include <cmath>
+class DatabaseStats
+{
+public:
+    // The statistics we collect:
+    QDateTime modified; // File modification time
+    int groupCount = 0; // Number of groups in the database
+    int entryCount = 0; // Number of entries (across all groups)
+    int expiredEntries = 0; // Number of expired entries
+    int excludedEntries = 0; // Number of known bad entries
+    int weakPasswords = 0; // Number of weak or poor passwords
+    int shortPasswords = 0; // Number of passwords 8 characters or less in size
+    int uniquePasswords = 0; // Number of unique passwords
+    int reusedPasswords = 0; // Number of non-unique passwords
+    int totalPasswordLength = 0; // Total length of all passwords
+
+    explicit DatabaseStats(QSharedPointer<Database> db);
+
+    int averagePwdLength() const;
+
+    int maxPwdReuse() const;
+
+    bool isAnyExpired() const;
+
+    bool areTooManyPwdsReused() const;
+
+    bool arePwdsReusedTooOften() const;
+
+    bool isAvgPwdTooShort() const;
+
+private:
+    QSharedPointer<Database> m_db;
+    QHash<QString, int> m_passwords;
+
+    void gatherStats(const QList<Group*>& groups);
+};
+#endif // KEEPASSXC_DATABASESTATS_H
diff --git a/src/core/PasswordHealth.h b/src/core/PasswordHealth.h
index 6e3179253..35b582e94 100644
--- a/src/core/PasswordHealth.h
+++ b/src/core/PasswordHealth.h
@@ -82,6 +82,12 @@ public:
         return m_entropy;
     }
 
+    struct Length
+    {
+        static const int Short = 8;
+        static const int Long = 25;
+    };
+
 private:
     int m_score = 0;
     double m_entropy = 0.0;
diff --git a/src/gui/reports/ReportsWidgetStatistics.cpp b/src/gui/reports/ReportsWidgetStatistics.cpp
index 3f37346eb..280ed4de5 100644
--- a/src/gui/reports/ReportsWidgetStatistics.cpp
+++ b/src/gui/reports/ReportsWidgetStatistics.cpp
@@ -19,138 +19,14 @@
 #include "ui_ReportsWidgetStatistics.h"
 
 #include "core/AsyncTask.h"
+#include "core/DatabaseStats.h"
 #include "core/Group.h"
 #include "core/Metadata.h"
 #include "core/PasswordHealth.h"
 #include "gui/Icons.h"
 
-#include <QFileInfo>
 #include <QStandardItemModel>
 
-namespace
-{
-    class Stats
-    {
-    public:
-        // The statistics we collect:
-        QDateTime modified; // File modification time
-        int groupCount = 0; // Number of groups in the database
-        int entryCount = 0; // Number of entries (across all groups)
-        int expiredEntries = 0; // Number of expired entries
-        int excludedEntries = 0; // Number of known bad entries
-        int weakPasswords = 0; // Number of weak or poor passwords
-        int shortPasswords = 0; // Number of passwords 8 characters or less in size
-        int uniquePasswords = 0; // Number of unique passwords
-        int reusedPasswords = 0; // Number of non-unique passwords
-        int totalPasswordLength = 0; // Total length of all passwords
-
-        // Ctor does all the work
-        explicit Stats(QSharedPointer<Database> db)
-            : modified(QFileInfo(db->filePath()).lastModified())
-            , m_db(db)
-        {
-            gatherStats(db->rootGroup()->groupsRecursive(true));
-        }
-
-        // Get average password length
-        int averagePwdLength() const
-        {
-            const auto passwords = uniquePasswords + reusedPasswords;
-            return passwords == 0 ? 0 : std::round(totalPasswordLength / double(passwords));
-        }
-
-        // Get max number of password reuse (=how many entries
-        // share the same password)
-        int maxPwdReuse() const
-        {
-            int ret = 0;
-            for (const auto& count : m_passwords) {
-                ret = std::max(ret, count);
-            }
-            return ret;
-        }
-
-        // A warning sign is displayed if one of the
-        // following returns true.
-        bool isAnyExpired() const
-        {
-            return expiredEntries > 0;
-        }
-
-        bool areTooManyPwdsReused() const
-        {
-            return reusedPasswords > uniquePasswords / 10;
-        }
-
-        bool arePwdsReusedTooOften() const
-        {
-            return maxPwdReuse() > 3;
-        }
-
-        bool isAvgPwdTooShort() const
-        {
-            return averagePwdLength() < 10;
-        }
-
-    private:
-        QSharedPointer<Database> m_db;
-        QHash<QString, int> m_passwords;
-
-        void gatherStats(const QList<Group*>& groups)
-        {
-            auto checker = HealthChecker(m_db);
-
-            for (const auto* group : groups) {
-                // Don't count anything in the recycle bin
-                if (group->isRecycled()) {
-                    continue;
-                }
-
-                ++groupCount;
-
-                for (const auto* entry : group->entries()) {
-                    // Don't count anything in the recycle bin
-                    if (entry->isRecycled()) {
-                        continue;
-                    }
-
-                    ++entryCount;
-
-                    if (entry->isExpired()) {
-                        ++expiredEntries;
-                    }
-
-                    // Get password statistics
-                    const auto pwd = entry->password();
-                    if (!pwd.isEmpty()) {
-                        if (!m_passwords.contains(pwd)) {
-                            ++uniquePasswords;
-                        } else {
-                            ++reusedPasswords;
-                        }
-
-                        if (pwd.size() < 8) {
-                            ++shortPasswords;
-                        }
-
-                        // Speed up Zxcvbn process by excluding very long passwords and most passphrases
-                        if (pwd.size() < 25 && checker.evaluate(entry)->quality() <= PasswordHealth::Quality::Weak) {
-                            ++weakPasswords;
-                        }
-
-                        if (entry->excludeFromReports()) {
-                            ++excludedEntries;
-                        }
-
-                        totalPasswordLength += pwd.size();
-                        m_passwords[pwd]++;
-                    }
-                }
-            }
-        }
-    };
-} // namespace
-
 ReportsWidgetStatistics::ReportsWidgetStatistics(QWidget* parent)
     : QWidget(parent)
     , m_ui(new Ui::ReportsWidgetStatistics())
@@ -205,7 +81,8 @@ void ReportsWidgetStatistics::showEvent(QShowEvent* event)
 
 void ReportsWidgetStatistics::calculateStats()
 {
-    const QScopedPointer<Stats> stats(AsyncTask::runAndWaitForFuture([this] { return new Stats(m_db); }));
+    const QScopedPointer<DatabaseStats> stats(
+        AsyncTask::runAndWaitForFuture([this] { return new DatabaseStats(m_db); }));
 
     m_referencesModel->clear();
     addStatsRow(tr("Database name"), m_db->metadata()->name());
diff --git a/tests/TestCli.cpp b/tests/TestCli.cpp
index 49b21dfa6..003d8fdbf 100644
--- a/tests/TestCli.cpp
+++ b/tests/TestCli.cpp
@@ -858,6 +858,22 @@ void TestCli::testInfo()
     QCOMPARE(m_stdout->readLine(), QByteArray("Cipher: AES 256-bit\n"));
     QCOMPARE(m_stdout->readLine(), QByteArray("KDF: AES (6000 rounds)\n"));
     QCOMPARE(m_stdout->readLine(), QByteArray("Recycle bin is enabled.\n"));
+    QVERIFY(m_stdout->readLine().contains(m_dbFile->fileName().toUtf8()));
+    QVERIFY(m_stdout->readLine().contains(
+        QByteArray("Database created: "))); // date changes often, so just test for the first part
+    QVERIFY(m_stdout->readLine().contains(
+        QByteArray("Last saved: "))); // date changes often, so just test for the first part
+    QCOMPARE(m_stdout->readLine(), QByteArray("Unsaved changes: no\n"));
+    QCOMPARE(m_stdout->readLine(), QByteArray("Number of groups: 8\n"));
+    QCOMPARE(m_stdout->readLine(), QByteArray("Number of entries: 2\n"));
+    QCOMPARE(m_stdout->readLine(), QByteArray("Number of expired entries: 0\n"));
+    QCOMPARE(m_stdout->readLine(), QByteArray("Unique passwords: 2\n"));
+    QCOMPARE(m_stdout->readLine(), QByteArray("Non-unique passwords: 0\n"));
+    QCOMPARE(m_stdout->readLine(), QByteArray("Maximum password reuse: 1\n"));
+    QCOMPARE(m_stdout->readLine(), QByteArray("Number of short passwords: 0\n"));
+    QCOMPARE(m_stdout->readLine(), QByteArray("Number of weak passwords: 2\n"));
+    QCOMPARE(m_stdout->readLine(), QByteArray("Entries excluded from reports: 0\n"));
+    QCOMPARE(m_stdout->readLine(), QByteArray("Average password length: 11 characters\n"));
 
     // Test with quiet option.
     setInput("a");