| 1 | | function wrap(text, tag) { |
| 2 | | return `<${tag}>${text}</${tag}>`; |
| 3 | | } |
| 4 | | |
| 5 | | function isTag(text, tag) { |
| 6 | | return text.startsWith(`<${tag}>`); |
| 7 | | } |
| 8 | | |
| 9 | | function parser(markdown, delimiter, tag) { |
| 10 | | const pattern = new RegExp(`${delimiter}(.+)${delimiter}`); |
| 11 | | const replacement = `<${tag}>$1</${tag}>`; |
| 12 | | return markdown.replace(pattern, replacement); |
| 13 | | } |
| 14 | | |
| 15 | | function parse__(markdown) { |
| 16 | | return parser(markdown, '__', 'strong'); |
| 17 | | } |
| 18 | | |
| 19 | | function parse_(markdown) { |
| 20 | | return parser(markdown, '_', 'em'); |
| 21 | | } |
| 22 | | |
| 23 | | function parseText(markdown, list) { |
| 24 | | const parsedText = parse_(parse__(markdown)); |
| 25 | | if (list) { |
| 26 | | return parsedText; |
| 27 | | } else { |
| 28 | | return wrap(parsedText, 'p'); |
| 29 | | } |
| 30 | | } |
| 31 | | |
| 32 | | function parseHeader(markdown, list) { |
| 33 | | let count = 0; |
| 34 | | for (let i = 0; i < markdown.length; i++) { |
| 35 | | if (markdown[i] === '#') { |
| 36 | | count += 1; |
| 37 | | } else { |
| 38 | | break; |
| 1 | /** |
| 2 | * Parses markdown text and converts it to HTML |
| 3 | * @param {string} markdown - The markdown text to parse |
| 4 | * @returns {string} - The resulting HTML |
| 5 | */ |
| 6 | export function parse(markdown) { |
| 7 | const lines = markdown.split('\n'); |
| 8 | let html = ''; |
| 9 | let inList = false; |
| 10 | |
| 11 | for (const line of lines) { |
| 12 | // Handle headers (#, ##, ###, etc.) |
| 13 | const headerMatch = line.match(/^(#{1,6})\s+(.+)$/); |
| 14 | if (headerMatch) { |
| 15 | // Close list if we were in one |
| 16 | if (inList) { |
| 17 | html += '</ul>'; |
| 18 | inList = false; |
| 19 | } |
| 20 | |
| 21 | const level = headerMatch[1].length; // Number of # characters |
| 22 | const content = headerMatch[2]; // Header text |
| 23 | html += `<h${level}>${parseTextFormatting(content)}</h${level}>`; |
| 24 | continue; |
| 39 | 25 | } |
| 40 | | } |
| 41 | | if (count === 0 || count > 6) { |
| 42 | | return [null, list]; |
| 43 | | } |
| 44 | | const headerTag = `h${count}`; |
| 45 | | const headerHtml = wrap(markdown.substring(count + 1), headerTag); |
| 46 | | if (list) { |
| 47 | | return [`</ul>${headerHtml}`, false]; |
| 48 | | } else { |
| 49 | | return [headerHtml, false]; |
| 50 | | } |
| 51 | | } |
| 52 | | |
| 53 | | function parseLineItem(markdown, list) { |
| 54 | | if (markdown.startsWith('*')) { |
| 55 | | const innerHtml = wrap(parseText(markdown.substring(2), true), 'li'); |
| 56 | | if (list) { |
| 57 | | return [innerHtml, true]; |
| 58 | | } else { |
| 59 | | return [`<ul>${innerHtml}`, true]; |
| 26 | |
| 27 | // Handle list items (* item) |
| 28 | if (line.startsWith('* ')) { |
| 29 | const content = line.substring(2); // Text after '* ' |
| 30 | |
| 31 | // Open list if not already in one |
| 32 | if (!inList) { |
| 33 | html += '<ul>'; |
| 34 | inList = true; |
| 35 | } |
| 36 | |
| 37 | html += `<li>${parseTextFormatting(content)}</li>`; |
| 38 | continue; |
| 39 | } |
| 40 | |
| 41 | // Handle paragraphs (regular text) |
| 42 | // Close list if we were in one |
| 43 | if (inList) { |
| 44 | html += '</ul>'; |
| 45 | inList = false; |
| 46 | } |
| 47 | |
| 48 | // Only add paragraph if line is not empty |
| 49 | if (line.trim() !== '') { |
| 50 | html += `<p>${parseTextFormatting(line)}</p>`; |
| 60 | 51 | } |
| 61 | 52 | } |
| 62 | | return [null, list]; |
| 63 | | } |
| 64 | | |
| 65 | | function parseParagraph(markdown, list) { |
| 66 | | if (!list) { |
| 67 | | return [parseText(markdown, false), false]; |
| 68 | | } else { |
| 69 | | return [`</ul>${parseText(markdown, false)}`, false]; |
| 70 | | } |
| 71 | | } |
| 72 | | |
| 73 | | function parseLine(markdown, list) { |
| 74 | | let [result, inListAfter] = parseHeader(markdown, list); |
| 75 | | if (result === null) { |
| 76 | | [result, inListAfter] = parseLineItem(markdown, list); |
| 77 | | } |
| 78 | | if (result === null) { |
| 79 | | [result, inListAfter] = parseParagraph(markdown, list); |
| 80 | | } |
| 81 | | if (result === null) { |
| 82 | | throw new Error('Remove this line and implement the function'); |
| 53 | |
| 54 | // Close any open list at the end |
| 55 | if (inList) { |
| 56 | html += '</ul>'; |
| 83 | 57 | } |
| 84 | | return [result, inListAfter]; |
| 58 | |
| 59 | return html; |
| 85 | 60 | } |
| 86 | 61 | |
| 87 | 62 | /** |
| 88 | | * @param {string} markdown |
| 89 | | * @returns {string} |
| 63 | * Parses text formatting (__ for bold, _ for italic) |
| 64 | * @param {string} text - The text to format |
| 65 | * @returns {string} - The formatted text with HTML tags |
| 90 | 66 | */ |
| 91 | | export function parse(markdown) { |
| 92 | | const lines = markdown.split('\n'); |
| 93 | | let result = ''; |
| 94 | | let list = false; |
| 95 | | for (let i = 0; i < lines.length; i++) { |
| 96 | | let [lineResult, newList] = parseLine(lines[i], list); |
| 97 | | result += lineResult; |
| 98 | | list = newList; |
| 99 | | } |
| 100 | | if (list) { |
| 101 | | return result + '</ul>'; |
| 102 | | } else { |
| 103 | | return result; |
| 104 | | } |
| 67 | function parseTextFormatting(text) { |
| 68 | // Parse bold text (__text__ -> <strong>text</strong>) |
| 69 | text = text.replace(/__(.+)__/g, '<strong>$1</strong>'); |
| 70 | |
| 71 | // Parse italic text (_text_ -> <em>text</em>) |
| 72 | text = text.replace(/_(.+)_/g, '<em>$1</em>'); |
| 73 | |
| 74 | return text; |
| 105 | 75 | } |