feat: Add side by side refactor widget (#276)

llmcore/CMakeLists.txt

@@ -18,6 +18,7 @@ add_library(LLMCore STATIC
     BaseTool.hpp BaseTool.cpp
     ContentBlocks.hpp
     RulesLoader.hpp RulesLoader.cpp
+    ResponseCleaner.hpp
 )
 
 target_link_libraries(LLMCore

llmcore/ResponseCleaner.hpp

@@ -0,0 +1,119 @@
+/* 
+ * Copyright (C) 2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist 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 QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QString>
+#include <QStringList>
+#include <QRegularExpression>
+
+namespace QodeAssist::LLMCore {
+
+class ResponseCleaner
+{
+public:
+    static QString clean(const QString &response)
+    {
+        QString cleaned = removeCodeBlocks(response);
+        cleaned = trimWhitespace(cleaned);
+        cleaned = removeExplanations(cleaned);
+        return cleaned;
+    }
+
+private:
+    static QString removeCodeBlocks(const QString &text)
+    {
+        if (!text.contains("```")) {
+            return text;
+        }
+
+        QRegularExpression codeBlockRegex("```\\w*\\n([\\s\\S]*?)```");
+        QRegularExpressionMatch match = codeBlockRegex.match(text);
+        if (match.hasMatch()) {
+            return match.captured(1);
+        }
+
+        int firstFence = text.indexOf("```");
+        int lastFence = text.lastIndexOf("```");
+        if (firstFence != -1 && lastFence > firstFence) {
+            int firstNewLine = text.indexOf('\n', firstFence);
+            if (firstNewLine != -1) {
+                return text.mid(firstNewLine + 1, lastFence - firstNewLine - 1);
+            }
+        }
+
+        return text;
+    }
+
+    static QString trimWhitespace(const QString &text)
+    {
+        QString result = text;
+        while (result.startsWith('\n') || result.startsWith('\r')) {
+            result = result.mid(1);
+        }
+        while (result.endsWith('\n') || result.endsWith('\r')) {
+            result.chop(1);
+        }
+        return result;
+    }
+
+    static QString removeExplanations(const QString &text)
+    {
+        static const QStringList explanationPrefixes = {
+            "here's the", "here is the", "here's", "here is",
+            "the refactored", "refactored code:", "code:",
+            "i've refactored", "i refactored", "i've changed", "i changed"
+        };
+
+        QStringList lines = text.split('\n');
+        int startLine = 0;
+
+        for (int i = 0; i < qMin(3, lines.size()); ++i) {
+            QString line = lines[i].trimmed().toLower();
+            bool isExplanation = false;
+
+            for (const QString &prefix : explanationPrefixes) {
+                if (line.startsWith(prefix) || line.contains(prefix + " code")) {
+                    isExplanation = true;
+                    break;
+                }
+            }
+
+            if (line.length() < 50 && line.endsWith(':')) {
+                isExplanation = true;
+            }
+
+            if (isExplanation) {
+                startLine = i + 1;
+            } else if (!line.isEmpty()) {
+                break;
+            }
+        }
+
+        if (startLine > 0 && startLine < lines.size()) {
+            lines = lines.mid(startLine);
+            return lines.join('\n');
+        }
+
+        return text;
+    }
+};
+
+} // namespace QodeAssist::LLMCore
+