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

impossible

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Passed

+// Utility function to wrap text in HTML tags
 function wrap(text, tag) {
   return `<${tag}>${text}</${tag}>`;
+}
+// Check if text starts with a specific HTML tag
 function isTag(text, tag) {
   return text.startsWith(`<${tag}>`);
+}
+function parser(markdown, delimiter, tag) {
+  const pattern = new RegExp(`${delimiter}(.+)${delimiter}`);
+// Generic parser for delimiter-based markdown (bold, italic, etc.)
+function parseDelimitedText(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 (using __ delimiter)
+function parseBoldText(markdown) {
+  return parseDelimitedText(markdown, '__', 'strong');
+}
+function parse_(markdown) {
+  return parser(markdown, '_', 'em');
+// Parse italic text (using _ delimiter)
+function parseItalicText(markdown) {
+  return parseDelimitedText(markdown, '_', 'em');
+}
+function parseText(markdown, list) {
+  const parsedText = parse_(parse__(markdown));
+  if (list) {
+    return parsedText;
+  } else {
+    return wrap(parsedText, 'p');
+  }
+// Parse inline formatting (bold and italic) within text
+function parseInlineFormatting(markdown) {
+  // Parse bold first, then italic to handle nested formatting correctly
+  return parseItalicText(parseBoldText(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];
+// Parse text content with optional paragraph wrapping
+function parseTextContent(markdown, skipParagraphWrap = false) {
+  const parsedText = parseInlineFormatting(markdown);
+  return skipParagraphWrap ? parsedText : wrap(parsedText, 'p');
+}
+// Parse markdown headers (#, ##, ###, etc.)
+function parseHeader(markdown, currentlyInList) {
+  // Count consecutive # characters at the start of the line
+  const headerMatch = markdown.match(/^(#{1,6})\s+(.+)$/);
+  // If no valid header pattern found, return null
+  if (!headerMatch) {
+    return [null, currentlyInList];
+  }
+  const headerTag = `h${count}`;
+  const headerHtml = wrap(markdown.substring(count + 1), headerTag);
+  if (list) {
+  const headerLevel = headerMatch[1].length;  // Number of # characters
+  const headerText = headerMatch[2];          // Text content after #
+  const headerTag = `h${headerLevel}`;
+  const headerHtml = wrap(headerText, headerTag);
+  // If we were in a list, close it before starting the header
+  if (currentlyInList) {
     return [`</ul>${headerHtml}`, false];
   } else {
     return [headerHtml, false];
+  }
+}
+function parseLineItem(markdown, list) {
+  if (markdown.startsWith('*')) {
+    const innerHtml = wrap(parseText(markdown.substring(2), true), 'li');
+    if (list) {
+      return [innerHtml, true];
+    } else {
+      return [`<ul>${innerHtml}`, true];
+    }
+// Parse list items (lines starting with *)
+function parseListItem(markdown, currentlyInList) {
+  // Check if line starts with a list item marker
+  if (!markdown.startsWith('*')) {
+    return [null, currentlyInList];
+  }
+  // Extract the list item content (skip "* " prefix)
+  const listItemContent = markdown.substring(2);
+  // Parse inline formatting within the list item
+  const formattedContent = parseTextContent(listItemContent, true);
+  // Wrap in list item tag
+  const listItemHtml = wrap(formattedContent, 'li');
+  // If we weren't already in a list, start a new unordered list
+  if (!currentlyInList) {
+    return [`<ul>${listItemHtml}`, true];
+  } else {
+    return [listItemHtml, true];
+  }
+  return [null, list];
+}
+function parseParagraph(markdown, list) {
+  if (!list) {
+    return [parseText(markdown, false), false];
+// Parse regular paragraphs (fallback when not header or list item)
+function parseParagraph(markdown, currentlyInList) {
+  const paragraphHtml = parseTextContent(markdown, false);
+  // If we were in a list, close it before starting the paragraph
+  if (currentlyInList) {
+    return [`</ul>${paragraphHtml}`, false];
   } else {
+    return [`</ul>${parseText(markdown, false)}`, false];
+    return [paragraphHtml, false];
+  }
+}
+function parseLine(markdown, list) {
+  let [result, inListAfter] = parseHeader(markdown, list);
+// Parse a single line of markdown, determining its type and converting to HTML
+function parseLine(markdown, currentlyInList) {
+  // Try to parse as header first (highest priority)
+  let [result, inListAfter] = parseHeader(markdown, currentlyInList);
+  // If not a header, try to parse as list item
   if (result === null) {
+    [result, inListAfter] = parseLineItem(markdown, list);
+    [result, inListAfter] = parseListItem(markdown, currentlyInList);
+  }
+  // If not a list item, parse as paragraph (fallback)
   if (result === null) {
+    [result, inListAfter] = parseParagraph(markdown, list);
+    [result, inListAfter] = parseParagraph(markdown, currentlyInList);
+  }
+  // This should never happen since parseParagraph always returns a result
   if (result === null) {
+    throw new Error('Remove this line and implement the function');
+    throw new Error('Unable to parse markdown line');
+  }
   return [result, inListAfter];
+}
 /**
+ * @param {string} markdown
+ * @returns {string}
+ * Parse markdown text and convert it to HTML
+ * @param {string} markdown - The markdown text to parse
+ * @returns {string} The equivalent HTML
  */
 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 htmlResult = '';
+  let currentlyInList = false;
+  // Process each line of markdown
+  for (const line of lines) {
+    const [lineHtml, stillInList] = parseLine(line, currentlyInList);
+    htmlResult += lineHtml;
+    currentlyInList = stillInList;
+  }
+  if (list) {
+    return result + '</ul>';
+  } else {
+    return result;
+  // If we ended while still in a list, close it
+  if (currentlyInList) {
+    htmlResult += '</ul>';
+  }
+  return htmlResult;
+}