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#include "markdown_translator.hpp"
#include <regex>
#include <iostream>
#include <algorithm>
MarkdownTranslator::MarkdownTranslator() : title("Carbon") {
}
MarkdownTranslator::~MarkdownTranslator() {
}
void MarkdownTranslator::processMetadata(const std::vector<std::string>& lines){
// format of keys -> key: value
for(std::string currentLine : lines){
size_t colonPos = currentLine.find(':');
if (colonPos != std::string::npos) {
std::string key = currentLine.substr(0, colonPos);
std::string value = currentLine.substr(colonPos + 1);
value.erase(0, value.find_first_not_of(" \t"));
if (key == "title") {
title = value;
}
}
}
}
std::string MarkdownTranslator::translate(const std::string& markdownContent, const std::string& cssPath) {
std::stringstream htmlOutput;
std::stringstream markdownStream(markdownContent);
std::string line;
std::vector<std::string> headers;
std::string currentLine;
bool metadataExists{false};
std::vector<std::string> metadataLines;
while (std::getline(markdownStream, currentLine)) {
if(currentLine == "---"){
if(metadataExists){
break;
} else {
metadataExists = true;
continue;
}
}
if(!metadataExists){
break;
}
metadataLines.push_back(currentLine);
}
processMetadata(metadataLines);
while (std::getline(markdownStream, currentLine)) {
std::regex headerRegex("^(#{1,3})\\s+(.*)$");
std::smatch matches;
if (std::regex_match(currentLine, matches, headerRegex)) {
int level = matches[1].length();
std::string content = matches[2];
if (level <= 3) {
headers.push_back(std::to_string(level) + ":" + content);
}
}
}
markdownStream.clear();
markdownStream.str(markdownContent);
// Start with basic HTML structure
htmlOutput << "<!DOCTYPE html>\n";
htmlOutput << "<html lang=\"en\">\n";
htmlOutput << "<head>\n";
htmlOutput << " <meta charset=\"UTF-8\">\n";
htmlOutput << " <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n";
htmlOutput << " <title>" + title + "</title>\n";
htmlOutput << " <link rel=\"stylesheet\" href=\"" << cssPath << "\">\n";
htmlOutput << "</head>\n";
htmlOutput << "<body>\n";
// Add navigation sidebar
generateSideBar(htmlOutput, headers);
// Main content container
htmlOutput << " <div class=\"main-content\">\n";
htmlOutput << " <div class=\"container\">\n";
// Process each line of markdown
// State of current parse
bool inFigureBlock{false};
std::vector<std::string> figureLines;
while (std::getline(markdownStream, line)) {
if(line.find(":::figure") == 0){
inFigureBlock = true;
figureLines.clear();
continue;
}
if(inFigureBlock && line == ":::"){
inFigureBlock = false;
htmlOutput << " " << processFigureBlock(figureLines) << "\n";
continue;
}
else if(inFigureBlock){
figureLines.push_back(line);
continue;
}
htmlOutput << " " << processLine(line);
}
// Add article meta information section
htmlOutput << " <div class=\"article-meta\">\n";
htmlOutput << " <p>Last updated: " << getCurrentDateTime() << "</p>\n";
htmlOutput << " </div>\n";
htmlOutput << " </div>\n";
htmlOutput << " </div>\n";
htmlOutput << "</body>\n";
htmlOutput << "</html>\n";
return htmlOutput.str();
}
void MarkdownTranslator::generateSideBar(std::stringstream& output, const std::vector<std::string>& headers) {
output << " <div class=\"nav-sidebar\">\n";
output << " <div class=\"nav-logo\">\n";
output << " <h3>" + title + "</h3>\n";
output << " </div>\n";
output << " <ul class=\"nav-menu\">\n";
output << " <h4>Table of Contents</h4>\n";
output << " <li><a href=\"index.html\">Home</a></li>\n";
output << " <li><a href=\"#\">Recent Changes</a></li>\n";
output << " <li><a href=\"#\">Random Page</a></li>\n";
output << " <ul class=\"nav-submenu\">\n";
// Generate navigation from headers
for (const auto& header : headers) {
size_t separatorPos = header.find(':');
if (separatorPos != std::string::npos) {
int level = std::stoi(header.substr(0, separatorPos));
std::string content = header.substr(separatorPos + 1);
// Create anchor ID from header content
std::string anchorId = createAnchorId(content);
// Add indentation based on header level
std::string indentation = "";
for (int i = 1; i < level; ++i) {
indentation += " ";
}
output << " " << indentation << "<li><a href=\"#" << anchorId << "\">" << content << "</a></li>\n";
}
}
output << " </ul>\n";
output << " </ul>\n";
output << " </div>\n";
}
std::string MarkdownTranslator::createAnchorId(const std::string& text) {
std::string id = text;
// Convert to lowercase
std::transform(id.begin(), id.end(), id.begin(), ::tolower);
// Replace spaces with hyphens
std::replace(id.begin(), id.end(), ' ', '-');
// Remove any non-alphanumeric characters except hyphens
id.erase(
std::remove_if(
id.begin(),
id.end(),
[](char c) { return !(std::isalnum(c) || c == '-'); }
),
id.end()
);
return id;
}
std::string MarkdownTranslator::getCurrentDateTime() {
std::time_t now = std::time(nullptr);
std::tm* localTime = std::localtime(&now);
char buffer[80];
std::strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", localTime);
return std::string(buffer);
}
std::string MarkdownTranslator::processLine(const std::string& line) {
std::string processed = line;
processed = processHeaders(processed);
if (processed == line) {
processed = processBold(processed);
processed = processItalic(processed);
processed = processLinks(processed);
if (!processed.empty() && processed[0] != '<') {
processed = processParagraph(processed);
}
}
return processed + "\n";
}
std::string MarkdownTranslator::processHeaders(const std::string& line) {
// Check for H1-H6
std::regex headerRegex("^(#{1,6})\\s+(.*)$");
std::smatch matches;
if (std::regex_match(line, matches, headerRegex)) {
int level = matches[1].length();
std::string content = matches[2];
std::string anchorId = createAnchorId(content);
return "<h" + std::to_string(level) + " id=\"" + anchorId + "\">" + content + "</h" + std::to_string(level) + ">";
}
return line;
}
std::string MarkdownTranslator::processBold(const std::string& text) {
// Replace **text** or __text__ with <strong>text</strong>
std::string result = text;
std::regex boldRegex("\\*\\*([^\\*]+)\\*\\*|__([^_]+)__");
result = std::regex_replace(result, boldRegex, "<strong>$1$2</strong>");
return result;
}
std::string MarkdownTranslator::processItalic(const std::string& text) {
// Replace *text* or _text_ with <em>text</em>
std::string result = text;
std::regex italicRegex("\\*([^\\*]+)\\*|_([^_]+)_");
result = std::regex_replace(result, italicRegex, "<em>$1$2</em>");
return result;
}
std::string MarkdownTranslator::processLinks(const std::string& text) {
// Replace [text](url) with <a href="url">text</a>
std::string result = text;
std::regex linkRegex("\\[([^\\]]+)\\]\\(([^\\)]+)\\)");
result = std::regex_replace(result, linkRegex, "<a href=\"$2\">$1</a>");
return result;
}
std::string MarkdownTranslator::processParagraph(const std::string& text) {
if (text.empty()) return "";
return "<p>" + text + "</p>";
}
std::string MarkdownTranslator::processSingleFigure(const std::string& text) {
// Extract image details using regex
std::regex imageRegex("!\\[(.*?)\\]\\(([^\\s\"]+)(\\s+\"(.*?)\")?\\)");
std::smatch matches;
if (std::regex_search(text, matches, imageRegex)) {
std::string alt = matches[1].str();
std::string src = matches[2].str();
std::string title = matches.size() > 4 && matches[4].matched ? " title=\"" + matches[4].str() + "\"" : "";
return "<img src=\"" + src + "\" alt=\"" + alt + "\"" + title + ">";
}
return text;
}
std::string MarkdownTranslator::processFigureBlock(const std::vector<std::string>& lines){
std::stringstream html;
std::string imageHtml;
std::string caption;
html << "<figure class=\"custom-figure\">\n";
// Process each line in the figure block
for (const auto& line : lines) {
if (line.find("