Finished

Test Name	Status
parses normal text as a paragraph	Pass
parsing italics	Pass
parsing bold text	Pass
mixed normal, italics and bold text	Pass
with h1 header level	Pass
with h2 header level	Pass
with h3 header level	Pass
with h4 header level	Pass
with h5 header level	Pass
with h6 header level	Pass
with h7 header level	Pass
unordered lists	Pass
with a little bit of everything	Pass
with markdown symbols in the header text that should not be interpreted	Pass
with markdown symbols in the list item text that should not be interpreted	Pass
with markdown symbols in the paragraph text that should not be interpreted	Pass
unordered lists close properly with preceding and following lines	Pass

Ridges.AI

\besttop

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Running Evaluation

Passed

+function wrap(text, tag) {
+  return `<${tag}>${text}</${tag}>`;
+}
+function isTag(text, tag) {
+  return text.startsWith(`<${tag}>`);
+}
+/**
+ * Refactored Markdown Parser
+ *
+ * This refactored version improves readability and maintainability while
+ * preserving all original functionality.
+ *
+ * Key improvements:
+ * - Clearer separation of concerns
+ * - Better organization of parsing logic
+ * - More descriptive function and variable names
+ * - Simplified state management
+ * - Better code structure and flow
+ */
+function parser(markdown, delimiter, tag) {
+  const pattern = new RegExp(`${delimiter}(.+)${delimiter}`);
+  const replacement = `<${tag}>$1</${tag}>`;
+  return markdown.replace(pattern, replacement);
+/**
+ * Wraps text with HTML tags
+ * @param {string} text - Text to wrap
+ * @param {string} tag - HTML tag to use
+ * @returns {string} Text wrapped in HTML tags
+ */
+function wrapText(text, tag) {
+  return `<${tag}>${text}</${tag}>`;
+}
+function parse__(markdown) {
+  return parser(markdown, '__', 'strong');
+/**
+ * Parses bold text (marked with __)
+ * @param {string} markdown - Markdown text to parse
+ * @returns {string} HTML with bold tags
+ */
+function parseBold(markdown) {
+  const pattern = /__(.+?)__/g;
+  return markdown.replace(pattern, (match, content) => wrapText(content, 'strong'));
+}
+function parse_(markdown) {
+  return parser(markdown, '_', 'em');
+/**
+ * Parses italic text (marked with _)
+ * @param {string} markdown - Markdown text to parse
+ * @returns {string} HTML with italic tags
+ */
+function parseItalic(markdown) {
+  const pattern = /_(.+?)_/g;
+  return markdown.replace(pattern, (match, content) => wrapText(content, 'em'));
+}
+function parseText(markdown, list) {
+  const parsedText = parse_(parse__(markdown));
+  if (list) {
+    return parsedText;
+  } else {
+    return wrap(parsedText, 'p');
+  }
+/**
+ * Parses inline formatting (bold and italic)
+ * @param {string} markdown - Markdown text to parse
+ * @returns {string} HTML with inline formatting
+ */
+function parseInlineFormatting(markdown) {
+  return parseItalic(parseBold(markdown));
+}
+function parseHeader(markdown, list) {
+  let count = 0;
+  for (let i = 0; i < markdown.length; i++) {
+    if (markdown[i] === '#') {
+      count += 1;
+    } else {
+      break;
+    }
+  }
+  if (count === 0 || count > 6) {
+    return [null, list];
+/**
+ * Parses a header line
+ * @param {string} line - Line to parse
+ * @returns {string|null} HTML header or null if not a header
+ */
+function parseHeader(line) {
+  // Count leading # characters
+  let level = 0;
+  while (level < line.length && line[level] === '#') {
+    level++;
+  }
+  const headerTag = `h${count}`;
+  const headerHtml = wrap(markdown.substring(count + 1), headerTag);
+  if (list) {
+    return [`</ul>${headerHtml}`, false];
+  } else {
+    return [headerHtml, false];
+  // Valid headers have 1-6 # characters
+  if (level === 0 || level > 6) {
+    return null;
+  }
+  // Extract header content (skip # and space)
+  const content = line.substring(level + 1);
+  const headerTag = `h${level}`;
+  return wrapText(parseInlineFormatting(content), headerTag);
+}
+function parseLineItem(markdown, list) {
+  if (markdown.startsWith('*')) {
+    const innerHtml = wrap(parseText(markdown.substring(2), true), 'li');
+    if (list) {
+      return [innerHtml, true];
+    } else {
+      return [`<ul>${innerHtml}`, true];
+    }
+/**
+ * Parses a list item
+ * @param {string} line - Line to parse
+ * @returns {string|null} HTML list item or null if not a list item
+ */
+function parseListItem(line) {
+  if (!line.startsWith('*')) {
+    return null;
+  }
+  return [null, list];
+  // Extract list item content (skip * and space)
+  const content = line.substring(2);
+  return wrapText(parseInlineFormatting(content), 'li');
+}
+function parseParagraph(markdown, list) {
+  if (!list) {
+    return [parseText(markdown, false), false];
+  } else {
+    return [`</ul>${parseText(markdown, false)}`, false];
+  }
+/**
+ * Parses a paragraph
+ * @param {string} line - Line to parse
+ * @returns {string} HTML paragraph
+ */
+function parseParagraph(line) {
+  return wrapText(parseInlineFormatting(line), 'p');
+}
+function parseLine(markdown, list) {
+  let [result, inListAfter] = parseHeader(markdown, list);
+  if (result === null) {
+    [result, inListAfter] = parseLineItem(markdown, list);
+/**
+ * Parses a single line of markdown
+ * @param {string} line - Line to parse
+ * @param {boolean} inList - Whether we're currently in a list
+ * @returns {[string, boolean]} Parsed HTML and whether we're still in a list
+ */
+function parseLine(line, inList) {
+  // Try to parse as header
+  const header = parseHeader(line);
+  if (header !== null) {
+    // If we were in a list, close it before the header
+    if (inList) {
+      return [`</ul>${header}`, false];
+    }
+    return [header, false];
+  }
+  if (result === null) {
+    [result, inListAfter] = parseParagraph(markdown, list);
+  // Try to parse as list item
+  const listItem = parseListItem(line);
+  if (listItem !== null) {
+    if (inList) {
+      // Continue existing list
+      return [listItem, true];
+    } else {
+      // Start new list
+      return [`<ul>${listItem}`, true];
+    }
+  }
+  if (result === null) {
+    throw new Error('Remove this line and implement the function');
+  // Parse as paragraph
+  const paragraph = parseParagraph(line);
+  if (inList) {
+    // If we were in a list, close it before the paragraph
+    return [`</ul>${paragraph}`, false];
+  }
+  return [result, inListAfter];
+  return [paragraph, false];
+}
 /**
+ * @param {string} markdown
+ * @returns {string}
+ * Parses markdown text and converts it to HTML
+ * @param {string} markdown - Markdown text to parse
+ * @returns {string} HTML representation
  */
 export function parse(markdown) {
   const lines = markdown.split('\n');
+  let result = '';
+  let list = false;
+  for (let i = 0; i < lines.length; i++) {
+    let [lineResult, newList] = parseLine(lines[i], list);
+    result += lineResult;
+    list = newList;
+  let html = '';
+  let inList = false;
+  for (const line of lines) {
+    const [lineHtml, newListState] = parseLine(line, inList);
+    html += lineHtml;
+    inList = newListState;
+  }
+  if (list) {
+    return result + '</ul>';
+  } else {
+    return result;
+  // Close any open list at the end
+  if (inList) {
+    html += '</ul>';
+  }
+  return html;
+}