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

+/**
+ * Parses Markdown text and converts it to HTML.
+ * Supports headers (# ## ### #### ##### ######),
+ * bold text (__text__),
+ * italic text (_text_),
+ * and unordered lists (* item).
+ *
+ * Refactored for better readability and maintainability.
+ */
+// Helper function to wrap text in HTML tags
 function wrap(text, tag) {
   return `<${tag}>${text}</${tag}>`;
+}
+function isTag(text, tag) {
+  return text.startsWith(`<${tag}>`);
+}
+function parser(markdown, delimiter, tag) {
+  const pattern = new RegExp(`${delimiter}(.+)${delimiter}`);
+  const replacement = `<${tag}>$1</${tag}>`;
+  return markdown.replace(pattern, replacement);
+}
+function parse__(markdown) {
+  return parser(markdown, '__', 'strong');
+// Parse bold text (__text__ -> <strong>text</strong>)
+function parseBold(markdown) {
+  const pattern = /__(.+)__/;
+  return markdown.replace(pattern, '<strong>$1</strong>');
+}
+function parse_(markdown) {
+  return parser(markdown, '_', 'em');
+// Parse italic text (_text_ -> <em>text</em>)
+function parseItalic(markdown) {
+  const pattern = /_(.+)_/;
+  return markdown.replace(pattern, '<em>$1</em>');
+}
+function parseText(markdown, list) {
+  const parsedText = parse_(parse__(markdown));
+  if (list) {
+    return parsedText;
+  } else {
+    return wrap(parsedText, 'p');
+  }
+// Parse text with inline formatting (bold and italic)
+function parseInlineFormatting(text) {
+  return parseItalic(parseBold(text));
+}
+function parseHeader(markdown, list) {
+// Parse header (# Header -> <h1>Header</h1>)
+function parseHeader(line) {
   let count = 0;
+  for (let i = 0; i < markdown.length; i++) {
+    if (markdown[i] === '#') {
+      count += 1;
+  // Count consecutive # characters at the beginning
+  for (let i = 0; i < line.length; i++) {
+    if (line[i] === '#') {
+      count++;
     } else {
       break;
+    }
+  }
+  // Valid headers have 1-6 # characters
   if (count === 0 || count > 6) {
+    return [null, list];
+    return null;
+  }
   const headerTag = `h${count}`;
+  const headerHtml = wrap(markdown.substring(count + 1), headerTag);
+  if (list) {
+    return [`</ul>${headerHtml}`, false];
+  } else {
+    return [headerHtml, false];
+  }
+  const headerText = line.substring(count + 1); // Skip # characters and space
+  const formattedText = parseInlineFormatting(headerText); // Apply inline formatting to headers
+  return wrap(formattedText, headerTag);
+}
+function parseLineItem(markdown, list) {
+  if (markdown.startsWith('*')) {
+    const innerHtml = wrap(parseText(markdown.substring(2), true), 'li');
+    if (list) {
+      return [innerHtml, true];
+    } else {
+      return [`<ul>${innerHtml}`, true];
+    }
+// Parse list item (* item -> <li>item</li>)
+function parseListItem(line) {
+  if (!line.startsWith('*')) {
+    return null;
+  }
+  return [null, list];
+  const itemText = line.substring(2); // Skip "* " prefix
+  const formattedText = parseInlineFormatting(itemText);
+  return wrap(formattedText, 'li');
+}
+function parseParagraph(markdown, list) {
+  if (!list) {
+    return [parseText(markdown, false), false];
+  } else {
+    return [`</ul>${parseText(markdown, false)}`, false];
+  }
+// Parse paragraph (plain text -> <p>text</p>)
+function parseParagraph(line) {
+  const formattedText = parseInlineFormatting(line);
+  return wrap(formattedText, 'p');
+}
+function parseLine(markdown, list) {
+  let [result, inListAfter] = parseHeader(markdown, list);
+  if (result === null) {
+    [result, inListAfter] = parseLineItem(markdown, list);
+// Process a single line based on its type
+function processLine(line) {
+  // Try to parse as header
+  const header = parseHeader(line);
+  if (header !== null) {
+    return { type: 'header', content: header };
+  }
+  if (result === null) {
+    [result, inListAfter] = parseParagraph(markdown, list);
+  // Try to parse as list item
+  const listItem = parseListItem(line);
+  if (listItem !== null) {
+    return { type: 'listItem', content: listItem };
+  }
+  if (result === null) {
+    throw new Error('Remove this line and implement the function');
+  }
+  return [result, inListAfter];
+  // Default to paragraph
+  return { type: 'paragraph', content: parseParagraph(line) };
+}
 /**
  */
 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 result = processLine(line);
+    // Handle list state transitions
+    if (result.type === 'listItem' && !inList) {
+      // Starting a new list
+      html += '<ul>' + result.content;
+      inList = true;
+    } else if (result.type !== 'listItem' && inList) {
+      // Ending a list
+      html += '</ul>' + result.content;
+      inList = false;
+    } else {
+      // No list state change
+      html += result.content;
+    }
+  }
+  if (list) {
+    return result + '</ul>';
+  } else {
+    return result;
+  // Close any open list at the end
+  if (inList) {
+    html += '</ul>';
+  }
+  return html;
+}

uv

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Passed