refactor: replace TextFormatter class with function

Brief list of changes:
  - removed TextFormatter class and its unnecessary instantiation;
  - added single method for applying markdown.

src/chatlog/chatmessage.cpp

@@ -61,8 +61,7 @@ ChatMessage::Ptr ChatMessage::createChatMessage(const QString& sender, const QSt
     // text styling
     Settings::StyleType styleType = Settings::getInstance().getStylePreference();
     if (styleType != Settings::StyleType::NONE) {
-        TextFormatter tf = TextFormatter(text);
-        text = tf.applyStyling(styleType == Settings::StyleType::WITH_CHARS);
+        text = applyMarkdown(text, styleType == Settings::StyleType::WITH_CHARS);
     }
 
 

src/chatlog/textformatter.cpp

@@ -120,17 +120,6 @@ QString highlightURL(const QString& message)
 }
 
 // clang-format on
-/**
- * @class TextFormatter
- *
- * @brief This class applies formatting to the text messages, e.g. font styling and URL highlighting
- */
-
-TextFormatter::TextFormatter(const QString& str)
-    : message(str)
-{
-}
-
 /**
  * @brief Counts equal symbols at the beginning of the string
  * @param str Source string
@@ -168,13 +157,16 @@ static bool isTagIntersection(const QString& str)
 
 /**
  * @brief Applies styles to the font of text that was passed to the constructor
+ * @param message Formatting string
  * @param showFormattingSymbols True, if it is supposed to include formatting symbols into resulting
  * string
+ * @return Copy of message with markdown applied
  */
-void TextFormatter::applyHtmlFontStyling(bool showFormattingSymbols)
+QString applyMarkdown(const QString& message, bool showFormattingSymbols)
 {
+    QString result = message;
     for (QPair<QRegularExpression, QString> pair : textPatternStyle) {
-        QRegularExpressionMatchIterator matchesIterator = pair.first.globalMatch(message);
+        QRegularExpressionMatchIterator matchesIterator = pair.first.globalMatch(result);
         int insertedTagSymbolsCount = 0;
 
         while (matchesIterator.hasNext()) {
@@ -186,28 +178,17 @@ void TextFormatter::applyHtmlFontStyling(bool showFormattingSymbols)
             int capturedStart = match.capturedStart() + insertedTagSymbolsCount;
             int capturedLength = match.capturedLength();
 
-            QString stylingText = message.mid(capturedStart, capturedLength);
+            QString stylingText = result.mid(capturedStart, capturedLength);
             int choppingSignsCount = showFormattingSymbols ? 0 : patternSignsCount(stylingText);
             int textStart = capturedStart + choppingSignsCount;
             int textLength = capturedLength - 2 * choppingSignsCount;
 
-            QString styledText = pair.second.arg(message.mid(textStart, textLength));
+            QString styledText = pair.second.arg(result.mid(textStart, textLength));
 
-            message.replace(capturedStart, capturedLength, styledText);
+            result.replace(capturedStart, capturedLength, styledText);
             // Subtracting length of "%1"
             insertedTagSymbolsCount += pair.second.length() - 2 - 2 * choppingSignsCount;
         }
     }
-}
-
-/**
- * @brief Applies all styling for the text
- * @param showFormattingSymbols True, if it is supposed to include formatting symbols into resulting
- * string
- * @return Styled string
- */
-QString TextFormatter::applyStyling(bool showFormattingSymbols)
-{
-    applyHtmlFontStyling(showFormattingSymbols);
-    return message;
+    return result;
 }

src/chatlog/textformatter.h

@@ -24,19 +24,6 @@
 
 QString highlightURL(const QString& message);
 
-class TextFormatter
-{
-private:
-    QString message;
-
-    void wrapUrl();
-
-    void applyHtmlFontStyling(bool showFormattingSymbols);
-
-public:
-    explicit TextFormatter(const QString& str);
-
-    QString applyStyling(bool showFormattingSymbols);
-};
+QString applyMarkdown(const QString& message, bool showFormattingSymbols);
 
 #endif // TEXTFORMATTER_H