saving a question (code generation)

src/cpp/include/api.h

@@ -2,3 +2,6 @@
 #include "parser.h"
 
 Result<ParseInfo> transpile(std::string fileContent, bool isDebug);
+
+std::string escapeText(std::string text);
+std::string wrapText(std::string text, size_t width);

src/cpp/qtapp/main.cpp

@@ -15,6 +15,7 @@
 #include <qwindow.h>
 #include <qwindowdefs.h>
 #include <regex>
+#include <sstream>
 #include <string>
 
 #include <QApplication>
@@ -50,6 +51,7 @@
 #define DISTANCE         2
 #define PER_PAGE         8
 #define MDEM_BACKGROUND  "#F7F7F7"
+#define WRAP_WIDTH 50
 
 struct Mdem {
     QWidget          wMdem;
@@ -104,6 +106,7 @@ QToolButton*             nextButton;
 QLabel*                  paginationLabel;
 
 // Mdem actions
+QToolButton             *save;
 QToolButton             *load;
 QToolButton             *practice;
 
@@ -396,10 +399,17 @@ void releaseError(ErrorView** item) {
 	std::cout << std::format("Released, current pool size: {}\n", errorPool.size());
 }
 
+std::string getFilename(std::string path) {
+	std::smatch matches;
+	auto filenameMatched = std::regex_search(path, matches, lastPathElementExp); 
+	return matches[2].str();
+}
+
 void reloadMdem() {
 	auto file = std::ifstream(currentMdem);
 	std::string content;
 
+	// Reset the mdem list.
 	for (auto mdem: mdems) {
 		mdem->wMdem.hide();
 	}
@@ -408,12 +418,11 @@ void reloadMdem() {
 	}
 	questions.clear();
 
-	std::smatch matches;
-	auto filenameMatched = std::regex_search(currentMdem, matches, lastPathElementExp); 
-	auto filename = matches[2];
-	if (filename.str().length() > 0) {
+	// Get filename.
+	auto filename = getFilename(currentMdem);
+	if (filename.length() > 0) {
 		deckListLabel->setText(
-			QString::fromStdString(std::format("mdem: {}", filename.str()))
+			QString::fromStdString(std::format("mdem: {}", filename))
 		);
 	} else {
 		deckListLabel->setText("");
@@ -453,7 +462,7 @@ void reloadMdem() {
 				QString::fromStdString(
 					std::format(
 						"Error while transpiling {}: {} ({}:{})",
-						filename.str(),
+						filename,
 						res.error,
 						res.row,
 						res.column
@@ -481,16 +490,10 @@ void pickDirectory(QString directory) {
 	std::smatch matches;
 	
 	// Update label.
-	auto filenameMatched = std::regex_search(
-		currentPath,
-		matches,
-		lastPathElementExp
-	); 
-	auto filename = matches[2];
 	mdemLabel->setText(QString::fromStdString(
 		std::format(
 			"memorybase: {}",
-			filename.str()
+			getFilename(currentPath)
 		)
 	));
 
@@ -582,15 +585,78 @@ int main(int argc, char *argv[]) {
     hTop->addWidget(deckListLabel);
     hTop->addStretch(1);
 
-    load  = new QToolButton();
-    practice = new QToolButton();
+	save = new QToolButton;
+    load  = new QToolButton;
+    practice = new QToolButton;
 
+    hTop->addWidget(save);
     hTop->addWidget(load);
     hTop->addWidget(practice);
 
     // Buttons
+    save->setText("Save");
     load->setText("Load");
 	practice->setText("Practice");
+	QObject::connect(save, &QToolButton::clicked, []() {
+		auto filename = getFilename(currentMdem);
+		std::stringstream ss;
+		for (auto question: questions) {
+			std::string cooldownPart;
+			if (question->Cooldown != 0) {
+				cooldownPart = std::format("[{:.2f}]", question->Cooldown);
+			}
+			ss << wrapText(
+				std::format("- {} {} >\n",
+				cooldownPart,
+				escapeText(question->QuestionText)),
+				WRAP_WIDTH
+			);
+			if (MultiElementQuestion* mw = dynamic_cast<MultiElementQuestion*>(question)) {
+				for (auto choice: mw->Choices) {
+					char opener;
+					if (choice.IsCorrect) {
+						opener = '+';
+					} else {
+						opener = '-';
+					}
+					std::string orderModifier;
+					if (mw->type == MultiElementType::Order) {
+						orderModifier = "^";
+					}
+					ss << 
+						wrapText(
+							std::format(
+								"\t{}{} {}\n",
+								opener,
+								orderModifier,
+								escapeText(choice.Answer)
+							)
+						, WRAP_WIDTH);
+				}
+			} else if (GroupQuestion* gq = dynamic_cast<GroupQuestion*>(question)) {
+				for (auto group: gq->Groups) {
+					ss << wrapText(
+						std::format(
+							"\t- {}:\n",
+							escapeText(group.name)
+						)
+					, WRAP_WIDTH);
+					for (auto element: group.elements) {
+						ss << wrapText(
+						std::format(
+							"\t\t- {}\n",
+							escapeText(element)
+						)
+						, WRAP_WIDTH);
+					}
+				}
+			}
+			ss << std::endl;
+
+			std::ofstream out("generated.mdem");
+			out << ss.str();
+		}
+	});
 	QObject::connect(load, &QToolButton::clicked, &reloadMdem);
 
     // Mdems

src/cpp/transpiler/api.cpp

@@ -1,3 +1,4 @@
+#include <sstream>
 #include <vector>
 #include <chrono>
 
@@ -8,10 +9,85 @@
 #include "time.h"
 #include "config.h"
 
+#define TABWIDTH 4
+
 bool debug;
 std::chrono::high_resolution_clock::time_point start;
 std::chrono::high_resolution_clock::time_point end;
 
+std::string wrapText(std::string text, size_t width) {
+	std::string result;
+    size_t currentLineLength = 0;
+    size_t wordStart = 0;
+    
+    size_t preservedSpaceCount = 0;
+    for (size_t i = 0; i < text.length(); ++i) {
+		if (text[i] == '\t') {
+            preservedSpaceCount += TABWIDTH;
+		} else if (!std::isalnum(text[i])) {
+            preservedSpaceCount++;
+        } else {
+            wordStart = i; 
+            break;
+        }
+    }
+    result += text.substr(0, wordStart);
+    currentLineLength = preservedSpaceCount;
+
+    for (size_t i = wordStart; i < text.length(); ++i) {
+        if (text[i] == ' ' || i == text.length() - 1) {
+            size_t wordEnd = (i == text.length() - 1) ? i + 1 : i; // Handle the last word
+            size_t wordLength = wordEnd - wordStart;
+            if (currentLineLength + wordLength > width) {
+                result += '\n';
+                result.append(preservedSpaceCount / TABWIDTH, '\t');
+                result.append(preservedSpaceCount % TABWIDTH, ' ');
+                currentLineLength = preservedSpaceCount;
+            }
+            result += text.substr(wordStart, wordLength) + ' ';
+            currentLineLength += wordLength + 1;
+            wordStart = i + 1;
+        }
+	}
+    return result;
+}
+
+std::string escapeText(std::string text) {
+	std::stringstream ss;
+	for (auto c: text) {
+		switch(c) {
+			case '\\':
+				ss << "\\\\";
+				break;
+			case '[':
+				ss << "\\[";
+				break;
+			case ']':
+				ss << "\\]";
+				break;
+			case '-':
+				ss << "\\-";
+				break;
+			case '^':
+				ss << "\\^";
+				break;
+			case ':':
+				ss << "\\:";
+				break;
+			case '>':
+				ss << "\\>";
+				break;
+			case '+':
+				ss << "\\+";
+				break;
+			default:
+				ss << c;
+				break;
+		}
+	}
+	return ss.str();
+}
+
 Result<ParseInfo> transpile(std::string fileContent, bool isDebug) {
 	start = std::chrono::high_resolution_clock::now();
 	end = std::chrono::high_resolution_clock::now();