feat(chatform): Highlight chat history

Calendar dates with chat history highlighted with bold
Fixes #2296

src/persistence/history.cpp

@@ -285,6 +285,47 @@ QList<History::HistMessage> History::getChatHistory(const QString& friendPk, con
     return messages;
 }
 
+/**
+ * @brief Fetches chat messages counts for each day from the database.
+ * @param friendPk Friend public key to fetch.
+ * @param from Start of period to fetch.
+ * @param to End of period to fetch.
+ * @return List of structs containing days offset and message count for that day.
+ */
+QList<History::DateMessages> History::getChatHistoryCounts(const ToxPk& friendPk, const QDate& from,
+                                                           const QDate& to)
+{
+    if (!isValid()) {
+        return {};
+    }
+    QDateTime fromTime(from);
+    QDateTime toTime(to);
+
+    QList<DateMessages> counts;
+
+    auto rowCallback = [&counts](const QVector<QVariant>& row) {
+        DateMessages app;
+        app.count = row[0].toUInt();
+        app.offsetDays = row[1].toUInt();
+        counts.append(app);
+    };
+
+    QString queryText =
+        QString("SELECT COUNT(history.id), ((timestamp / 1000 / 60 / 60 / 24) - %4 ) AS day "
+                "FROM history "
+                "JOIN peers chat ON chat_id = chat.id "
+                "WHERE timestamp BETWEEN %1 AND %2 AND chat.public_key='%3'"
+                "GROUP BY day;")
+            .arg(fromTime.toMSecsSinceEpoch())
+            .arg(toTime.toMSecsSinceEpoch())
+            .arg(friendPk.toString())
+            .arg(QDateTime::fromMSecsSinceEpoch(0).daysTo(fromTime));
+
+    db->execNow({queryText, rowCallback});
+
+    return counts;
+}
+
 /**
  * @brief Marks a message as sent.
  * Removing message from the faux-offline pending messages list.

src/persistence/history.h

@@ -27,6 +27,7 @@
 #include <cstdint>
 #include <tox/toxencryptsave.h>
 
+#include "src/core/toxpk.h"
 #include "src/persistence/db/rawdatabase.h"
 
 class Profile;
@@ -58,6 +59,12 @@ class History
         bool isSent;
     };
 
+    struct DateMessages
+    {
+        uint offsetDays;
+        uint count;
+    };
+
 public:
     explicit History(std::shared_ptr<RawDatabase> db);
     ~History();
@@ -73,6 +80,9 @@ class History
 
     QList<HistMessage> getChatHistory(const QString& friendPk, const QDateTime& from,
                                       const QDateTime& to);
+
+    QList<DateMessages> getChatHistoryCounts(const ToxPk& friendPk, const QDate& from, const QDate& to);
+
     void markAsSent(qint64 messageId);
 
 protected:

src/widget/form/chatform.cpp

@@ -808,7 +808,7 @@ void ChatForm::onLoadHistory()
         return;
     }
 
-    LoadHistoryDialog dlg;
+    LoadHistoryDialog dlg(f->getPublicKey());
     if (dlg.exec()) {
         QDateTime fromTime = dlg.getFromDate();
         loadHistory(fromTime);

src/widget/form/loadhistorydialog.cpp

@@ -19,12 +19,21 @@
 
 #include "loadhistorydialog.h"
 #include "ui_loadhistorydialog.h"
+#include "src/nexus.h"
+#include "src/persistence/history.h"
+#include "src/persistence/profile.h"
+#include <QDate>
+#include <QTextCharFormat>
 
-LoadHistoryDialog::LoadHistoryDialog(QWidget* parent)
+LoadHistoryDialog::LoadHistoryDialog(const ToxPk& friendPk, QWidget* parent)
     : QDialog(parent)
     , ui(new Ui::LoadHistoryDialog)
+    , friendPk(friendPk)
 {
     ui->setupUi(this);
+    highlightDates(QDate::currentDate().year(), QDate::currentDate().month());
+    connect(ui->fromDate, &QCalendarWidget::currentPageChanged, this,
+            &LoadHistoryDialog::highlightDates);
 }
 
 LoadHistoryDialog::~LoadHistoryDialog()
@@ -43,3 +52,20 @@ QDateTime LoadHistoryDialog::getFromDate()
 
     return res;
 }
+
+void LoadHistoryDialog::highlightDates(int year, int month)
+{
+    History* history = Nexus::getProfile()->getHistory();
+    QDate monthStart(year, month, 1);
+    QDate monthEnd(year, month + 1, 1);
+    QList<History::DateMessages> counts =
+        history->getChatHistoryCounts(this->friendPk, monthStart, monthEnd);
+
+    QTextCharFormat bold;
+    bold.setFontWeight(QFont::Bold);
+
+    QCalendarWidget* calendar = ui->fromDate;
+    for (History::DateMessages p : counts) {
+        calendar->setDateTextFormat(monthStart.addDays(p.offsetDays), bold);
+    }
+}

src/widget/form/loadhistorydialog.h

@@ -20,6 +20,7 @@
 #ifndef LOADHISTORYDIALOG_H
 #define LOADHISTORYDIALOG_H
 
+#include "src/core/toxpk.h"
 #include <QDateTime>
 #include <QDialog>
 
@@ -32,13 +33,17 @@ class LoadHistoryDialog : public QDialog
     Q_OBJECT
 
 public:
-    explicit LoadHistoryDialog(QWidget* parent = 0);
+    explicit LoadHistoryDialog(const ToxPk& friendPk, QWidget* parent = 0);
     ~LoadHistoryDialog();
 
     QDateTime getFromDate();
 
+public slots:
+    void highlightDates(int year, int month);
+
 private:
     Ui::LoadHistoryDialog* ui;
+    const ToxPk friendPk;
 };
 
 #endif // LOADHISTORYDIALOG_H