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

+// Helper function to wrap text in HTML tags
 function wrap(text, tag) {
   return `<${tag}>${text}</${tag}>`;
+}
+// Helper function to check if text starts with a specific HTML tag
 function isTag(text, tag) {
   return text.startsWith(`<${tag}>`);
+}
+function parser(markdown, delimiter, tag) {
+// Generic parser for markdown delimiters (bold, italic, etc.)
+function parseMarkdownDelimiter(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 parseBold(markdown) {
+  return parseMarkdownDelimiter(markdown, '__', 'strong');
+}
+function parse_(markdown) {
+  return parser(markdown, '_', 'em');
+// Parse italic text (using _ delimiter)
+function parseItalic(markdown) {
+  return parseMarkdownDelimiter(markdown, '_', 'em');
+}
+function parseText(markdown, list) {
+  const parsedText = parse_(parse__(markdown));
+  if (list) {
+    return parsedText;
+// Parse regular text, applying inline formatting (bold, italic) and wrapping in paragraph tags if not in a list
+function parseText(markdown, inList) {
+  // Apply inline formatting (bold and italic)
+  const formattedText = parseItalic(parseBold(markdown));
+  // If we're inside a list, don't wrap in paragraph tags
+  if (inList) {
+    return formattedText;
   } else {
+    return wrap(parsedText, 'p');
+    // Otherwise, wrap the text in paragraph tags
+    return wrap(formattedText, 'p');
+  }
+}
+function parseHeader(markdown, list) {
+  let count = 0;
+// Parse markdown headers (lines starting with #)
+function parseHeader(markdown, inList) {
+  // Count the number of # characters at the start
+  let headerLevel = 0;
   for (let i = 0; i < markdown.length; i++) {
     if (markdown[i] === '#') {
+      count += 1;
+      headerLevel += 1;
     } else {
       break;
+    }
+  }
+  if (count === 0 || count > 6) {
+    return [null, list];
+  // Valid headers have 1-6 # characters
+  if (headerLevel === 0 || headerLevel > 6) {
+    return [null, inList];
+  }
+  const headerTag = `h${count}`;
+  const headerHtml = wrap(markdown.substring(count + 1), headerTag);
+  if (list) {
+  // Create the appropriate header tag (h1, h2, etc.)
+  const headerTag = `h${headerLevel}`;
+  const headerContent = markdown.substring(headerLevel + 1).trim();
+  const headerHtml = wrap(headerContent, headerTag);
+  // If we were in a list, close it before the header
+  if (inList) {
     return [`</ul>${headerHtml}`, false];
   } else {
     return [headerHtml, false];
+  }
+}
+function parseLineItem(markdown, list) {
+// Parse list items (lines starting with *)
+function parseLineItem(markdown, inList) {
+  // Check if this line is a list item
   if (markdown.startsWith('*')) {
+    const innerHtml = wrap(parseText(markdown.substring(2), true), 'li');
+    if (list) {
+      return [innerHtml, true];
+    // Extract the content (skip the '* ' prefix)
+    const itemContent = markdown.substring(2);
+    // Parse the content with inline formatting, without paragraph wrapping (since it's in a list)
+    const formattedContent = parseText(itemContent, true);
+    // Wrap the content in list item tags
+    const listItemHtml = wrap(formattedContent, 'li');
+    // If we're already in a list, just return the list item
+    // Otherwise, start a new unordered list
+    if (inList) {
+      return [listItemHtml, true];
     } else {
+      return [`<ul>${innerHtml}`, true];
+      return [`<ul>${listItemHtml}`, true];
+    }
+  }
+  return [null, list];
+  // Not a list item
+  return [null, inList];
+}
+function parseParagraph(markdown, list) {
+  if (!list) {
+    return [parseText(markdown, false), false];
+// Parse regular paragraphs (fallback when not a header or list item)
+function parseParagraph(markdown, inList) {
+  // Parse the text with inline formatting and paragraph wrapping
+  const paragraphHtml = parseText(markdown, false);
+  // If we were in a list, close it before the paragraph
+  if (inList) {
+    return [`</ul>${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
+// Returns [htmlResult, inListAfter] tuple
+function parseLine(markdown, inList) {
+  // Skip empty lines entirely
+  if (markdown.trim() === '') {
+    // If we're in a list, close it when we encounter an empty line
+    if (inList) {
+      return ['</ul>', false];
+    }
+    // Otherwise, return empty string (no HTML for empty lines)
+    return ['', false];
+  }
+  // Try to parse as header first (highest priority)
+  let [result, newInList] = parseHeader(markdown, inList);
+  // If not a header, try to parse as list item
   if (result === null) {
+    [result, inListAfter] = parseLineItem(markdown, list);
+    [result, newInList] = parseLineItem(markdown, inList);
+  }
+  // If not a header or list item, treat as paragraph
   if (result === null) {
+    [result, inListAfter] = parseParagraph(markdown, list);
+    [result, newInList] = parseParagraph(markdown, inList);
+  }
+  // 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];
+  return [result, newInList];
+}
 /**
+ * @param {string} markdown
+ * @returns {string}
+ * Main markdown parser function
+ * Converts markdown text to HTML
+ * @param {string} markdown - The markdown text to parse
+ * @returns {string} The equivalent HTML
  */
 export function parse(markdown) {
+  // Split the markdown into individual lines
   const lines = markdown.split('\n');
+  let result = '';
+  let list = false;
+  let htmlResult = '';
+  let inList = false; // Track whether we're currently inside a list
+  // Process each line sequentially
   for (let i = 0; i < lines.length; i++) {
+    let [lineResult, newList] = parseLine(lines[i], list);
+    result += lineResult;
+    list = newList;
+    const currentLine = lines[i];
+    // Parse the current line and get the HTML result and new list state
+    const [lineHtml, newInListState] = parseLine(currentLine, inList);
+    // Append the HTML for this line
+    htmlResult += lineHtml;
+    // Update the list state for the next iteration
+    inList = newInListState;
+  }
+  if (list) {
+    return result + '</ul>';
+  // If we ended while still in a list, close it
+  if (inList) {
+    return htmlResult + '</ul>';
   } else {
+    return result;
+    return htmlResult;
+  }
+}