Basic logging implemented

Implemented scuffed logging settings page
Add helper function to PathManager to create an arbitrary folder

src/singletons/helper/loggingchannel.cpp

@@ -0,0 +1,82 @@
+#include "loggingchannel.hpp"
+
+#include <QDir>
+
+#include <ctime>
+
+namespace chatterino {
+namespace singletons {
+
+LoggingChannel::LoggingChannel(const QString &_channelName, const QString &_baseDirectory)
+    : channelName(_channelName)
+    , baseDirectory(_baseDirectory)
+{
+    QDateTime now = QDateTime::currentDateTime();
+
+    QString baseFileName = this->channelName + "-" + now.toString("yyyy-MM-dd") + ".log";
+
+    // Open file handle to log file of current date
+    this->fileHandle.setFileName(this->baseDirectory + QDir::separator() + baseFileName);
+
+    this->fileHandle.open(QIODevice::Append);
+    this->appendLine(this->generateOpeningString(now));
+}
+
+LoggingChannel::~LoggingChannel()
+{
+    this->appendLine(this->generateClosingString());
+    this->fileHandle.close();
+}
+
+void LoggingChannel::addMessage(std::shared_ptr<messages::Message> message)
+{
+    QDateTime now = QDateTime::currentDateTime();
+
+    QString str;
+    str.append('[');
+    str.append(now.toString("HH:mm:ss"));
+    str.append("] ");
+
+    if ((message->flags & messages::Message::MessageFlags::System) != 0) {
+        str.append(message->searchText);
+        str.append('\n');
+    } else {
+        str.append(message->loginName);
+        str.append(": ");
+        str.append(message->searchText);
+        str.append('\n');
+    }
+
+    this->appendLine(str);
+}
+
+QString LoggingChannel::generateOpeningString(const QDateTime &now) const
+{
+    QString ret = QLatin1Literal("# Start logging at ");
+
+    ret.append(now.toString("yyyy-MM-dd HH:mm:ss "));
+    ret.append(now.timeZoneAbbreviation());
+    ret.append('\n');
+
+    return ret;
+}
+
+QString LoggingChannel::generateClosingString(const QDateTime &now) const
+{
+    QString ret = QLatin1Literal("# Stop logging at ");
+
+    ret.append(now.toString("yyyy-MM-dd HH:mm:ss"));
+    ret.append(now.timeZoneAbbreviation());
+    ret.append('\n');
+
+    return ret;
+}
+
+void LoggingChannel::appendLine(const QString &line)
+{
+    this->fileHandle.write(line.toUtf8());
+    this->fileHandle.flush();
+}
+
+}  // namespace singletons
+}  // namespace chatterino