import { IExecuteFunctions } from 'n8n-core'; import { IDataObject, INodeExecutionData, INodeType, INodeTypeDescription, JsonObject, } from 'n8n-workflow'; import { Converter } from 'showdown'; import { NodeHtmlMarkdown } from 'node-html-markdown'; import { isEmpty, set } from 'lodash'; export class Markdown implements INodeType { description: INodeTypeDescription = { displayName: 'Markdown', name: 'markdown', icon: 'file:markdown.svg', group: ['output'], version: 1, subtitle: '={{$parameter["mode"]==="markdownToHtml" ? "Markdown to HTML" : "HTML to Markdown"}}', description: 'Convert data between Markdown and HTML', defaults: { name: 'Markdown', color: '#000000', }, inputs: ['main'], outputs: ['main'], credentials: [], properties: [ { displayName: 'Mode', name: 'mode', type: 'options', options: [ { name: 'Markdown to HTML', value: 'markdownToHtml', description: 'Convert data from Markdown to HTML', }, { name: 'HTML to Markdown', value: 'htmlToMarkdown', description: 'Convert data from HTML to Markdown', }, ], default: 'htmlToMarkdown', }, { displayName: 'HTML', name: 'html', type: 'string', displayOptions: { show: { mode: ['htmlToMarkdown'], }, }, default: '', required: true, description: 'The HTML to be converted to markdown', }, { displayName: 'Markdown', name: 'markdown', type: 'string', typeOptions: { alwaysOpenEditWindow: true, }, displayOptions: { show: { mode: ['markdownToHtml'], }, }, default: '', required: true, description: 'The Markdown to be converted to html', }, { displayName: 'Destination Key', name: 'destinationKey', type: 'string', displayOptions: { show: { mode: ['markdownToHtml', 'htmlToMarkdown'], }, }, default: 'data', required: true, placeholder: '', description: 'The field to put the output in. Specify nested fields using dots, e.g."level1.level2.newKey".', }, //============= HTML to Markdown Options =============== { displayName: 'Options', name: 'options', type: 'collection', placeholder: 'Add Option', default: {}, displayOptions: { show: { mode: ['htmlToMarkdown'], }, }, options: [ { displayName: 'Bullet Marker', name: 'bulletMarker', type: 'string', default: '*', description: 'Specify bullet marker, default *', }, { displayName: 'Code Block Fence', name: 'codeFence', type: 'string', default: '```', description: 'Specify code block fence, default ```', }, { displayName: 'Emphasis Delimiter', name: 'emDelimiter', type: 'string', default: '_', description: 'Specify emphasis delimiter, default _', }, { displayName: 'Global Escape Pattern', name: 'globalEscape', type: 'fixedCollection', typeOptions: { multipleValues: false, }, default: {}, description: 'Setting this will override the default escape settings, you might want to use textReplace option instead', options: [ { name: 'value', displayName: 'Value', values: [ { displayName: 'Pattern', name: 'pattern', type: 'string', default: '', description: 'RegEx for pattern', }, { displayName: 'Replacement', name: 'replacement', type: 'string', default: '', description: 'String replacement', }, ], }, ], }, { displayName: 'Ignored Elements', name: 'ignore', type: 'string', default: '', description: 'Supplied elements will be ignored (ignores inner text does not parse children)', placeholder: 'e.g. h1, p ...', hint: 'Comma separated elements', }, { displayName: 'Keep Images With Data', name: 'keepDataImages', type: 'boolean', default: false, description: 'Whether to keep images with data: URI (Note: These can be up to 1MB each), e.g. <img src="data:image/gif;base64,R0lGODlhEAAQAMQAAORHHOVSK......0o/">', }, { displayName: 'Line Start Escape Pattern', name: 'lineStartEscape', type: 'fixedCollection', typeOptions: { multipleValues: false, }, default: {}, description: 'Setting this will override the default escape settings, you might want to use textReplace option instead', options: [ { name: 'value', displayName: 'Value', values: [ { displayName: 'Pattern', name: 'pattern', type: 'string', default: '', description: 'RegEx for pattern', }, { displayName: 'Replacement', name: 'replacement', type: 'string', default: '', description: 'String replacement', }, ], }, ], }, { displayName: 'Max Consecutive New Lines', name: 'maxConsecutiveNewlines', type: 'number', default: 3, description: 'Specify max consecutive new lines allowed', }, { displayName: 'Place URLs At The Bottom', name: 'useLinkReferenceDefinitions', type: 'boolean', default: false, description: 'Whether to Place URLS at the bottom and format links using link reference definitions', }, { displayName: 'Strong Delimiter', name: 'strongDelimiter', type: 'string', default: '**', description: 'Specify strong delimiter, default **', }, { displayName: 'Style For Code Block', name: 'codeBlockStyle', type: 'options', default: 'fence', description: 'Specify style for code block, default "fence"', options: [ { name: 'Fence', value: 'fence', }, { name: 'Indented', value: 'indented', }, ], }, { displayName: 'Text Replacement Pattern', name: 'textReplace', type: 'fixedCollection', typeOptions: { multipleValues: true, }, default: [], description: 'User-defined text replacement pattern (Replaces matching text retrieved from nodes)', options: [ { name: 'values', displayName: 'Values', values: [ { displayName: 'Pattern', name: 'pattern', type: 'string', default: '', description: 'RegEx for pattern', }, { displayName: 'Replacement', name: 'replacement', type: 'string', default: '', description: 'String replacement', }, ], }, ], }, { displayName: 'Treat As Blocks', name: 'blockElements', type: 'string', default: '', description: 'Supplied elements will be treated as blocks (surrounded with blank lines)', placeholder: 'e.g. p, div, ...', hint: 'Comma separated elements', }, ], }, //============= Markdown to HTML Options =============== { displayName: 'Options', name: 'options', type: 'collection', placeholder: 'Add Option', default: {}, displayOptions: { show: { mode: ['markdownToHtml'], }, }, options: [ { displayName: 'Add Blank To Links', name: 'openLinksInNewWindow', type: 'boolean', default: false, description: 'Whether to open all links in new windows (by adding the attribute target="_blank" to tags)', }, { displayName: 'Automatic Linking to URLs', name: 'simplifiedAutoLink', type: 'boolean', default: false, description: 'Whether to enable automatic linking to URLs', }, { displayName: 'Backslash Escapes HTML Tags', name: 'backslashEscapesHTMLTags', type: 'boolean', default: false, description: 'Whether to support for HTML Tag escaping ex: <div>foo</div>', }, { displayName: 'Complete HTML Document', name: 'completeHTMLDocument', type: 'boolean', default: false, description: 'Whether to output a complete html document, including <html>, <head> and <body> tags instead of an HTML fragment', }, { displayName: 'Customized Header ID', name: 'customizedHeaderId', type: 'boolean', default: false, description: 'Whether to use text in curly braces as header ID', }, { displayName: 'Emoji Support', name: 'emoji', type: 'boolean', default: false, description: 'Whether to enable emoji support. Ex: this is a :smile: emoji For more info on available emojis, see https://github.com/showdownjs/showdown/wiki/Emojis.', }, { displayName: 'Encode Emails', name: 'encodeEmails', type: 'boolean', default: true, description: 'Whether to enable e-mail addresses encoding through the use of Character Entities, transforming ASCII e-mail addresses into its equivalent decimal entities', }, { displayName: 'Exclude Trailing Punctuation From URLs', name: 'excludeTrailingPunctuationFromURLs', type: 'boolean', default: false, description: 'Whether to exclude trailing punctuation from autolinking URLs. Punctuation excluded: . ! ? ( ). Only applies if simplifiedAutoLink option is set to true.', }, { displayName: 'GitHub Code Blocks', name: 'ghCodeBlocks', type: 'boolean', default: true, description: 'Whether to enable support for GFM code block style', }, { displayName: 'GitHub Compatible Header IDs', name: 'ghCompatibleHeaderId', type: 'boolean', default: false, description: 'Whether to generate header IDs compatible with github style (spaces are replaced with dashes and a bunch of non alphanumeric chars are removed)', }, { displayName: 'GitHub Mention Link', name: 'ghMentionsLink', type: 'string', default: 'https://github.com/{u}', description: 'Whether to change the link generated by @mentions. Showdown will replace {u} with the username. Only applies if ghMentions option is enabled.', }, { displayName: 'GitHub Mentions', name: 'ghMentions', type: 'boolean', default: false, description: 'Whether to enable github @mentions, which link to the username mentioned', }, { displayName: 'GitHub Task Lists', name: 'tasklists', type: 'boolean', default: false, description: 'Whether to enable support for GFM tasklists', }, { displayName: 'Header Level Start', name: 'headerLevelStart', type: 'number', default: 1, description: 'Whether to set the header starting level', }, { displayName: 'Mandatory Space Before Header', name: 'requireSpaceBeforeHeadingText', type: 'boolean', default: false, description: 'Whether to make adding a space between # and the header text mandatory', }, { displayName: 'Middle Word Asterisks', name: 'literalMidWordAsterisks', type: 'boolean', default: false, description: 'Whether to stop showdown from interpreting asterisks in the middle of words as and and instead treat them as literal asterisks', }, { displayName: 'Middle Word Underscores', name: 'literalMidWordUnderscores', type: 'boolean', default: false, description: 'Whether to stop showdown from interpreting underscores in the middle of words as and and instead treat them as literal underscores', }, { displayName: 'No Header ID', name: 'noHeaderId', type: 'boolean', default: false, description: 'Whether to disable the automatic generation of header IDs', }, { displayName: 'Parse Image Dimensions', name: 'parseImgDimensions', type: 'boolean', default: false, description: 'Whether to enable support for setting image dimensions from within markdown syntax', }, { displayName: 'Prefix Header ID', name: 'prefixHeaderId', type: 'string', default: 'section', description: 'Add a prefix to the generated header IDs', }, { displayName: 'Raw Header ID', name: 'rawHeaderId', type: 'boolean', default: false, description: 'Whether to remove only spaces, \' and " from generated header IDs (including prefixes), replacing them with dashes (-)', }, { displayName: 'Raw Prefix Header ID', name: 'rawPrefixHeaderId', type: 'boolean', default: false, description: 'Whether to prevent showdown from modifying the prefix', }, { displayName: 'Simple Line Breaks', name: 'simpleLineBreaks', type: 'boolean', default: false, description: 'Whether to parse line breaks as <br>, like GitHub does, without needing 2 spaces at the end of the line', }, { displayName: 'Smart Indentation Fix', name: 'smartIndentationFix', type: 'boolean', default: false, description: 'Whether to try to smartly fix indentation problems related to es6 template strings in the midst of indented code', }, { displayName: 'Spaces Indented Sublists', name: 'disableForced4SpacesIndentedSublists', type: 'boolean', default: false, description: 'Whether to disable the requirement of indenting sublists by 4 spaces for them to be nested, effectively reverting to the old behavior where 2 or 3 spaces were enough', }, { displayName: 'Split Adjacent Blockquotes', name: 'splitAdjacentBlockquotes', type: 'boolean', default: false, description: 'Whether to split adjacent blockquote blocks', }, { displayName: 'Strikethrough', name: 'strikethrough', type: 'boolean', default: false, description: 'Whether to enable support for strikethrough syntax', }, { displayName: 'Tables Header ID', name: 'tablesHeaderId', type: 'boolean', default: false, description: 'Whether to add an ID property to table headers tags', }, { displayName: 'Tables Support', name: 'tables', type: 'boolean', default: false, description: 'Whether to enable support for tables syntax', }, ], }, ], }; async execute(this: IExecuteFunctions): Promise { const items = this.getInputData(); const returnData: IDataObject[] = []; const mode = this.getNodeParameter('mode', 0) as string; const { length } = items; for (let i = 0; i < length; i++) { try { if (mode === 'htmlToMarkdown') { const options = this.getNodeParameter('options', i) as IDataObject; const destinationKey = this.getNodeParameter('destinationKey', i) as string; const textReplaceOption = this.getNodeParameter( 'options.textReplace.values', i, [], ) as IDataObject[]; options.textReplace = !isEmpty(textReplaceOption) ? textReplaceOption.map((entry) => [entry.pattern, entry.replacement]) : undefined; const lineStartEscapeOption = this.getNodeParameter( 'options.lineStartEscape.value', i, {}, ) as IDataObject; options.lineStartEscape = !isEmpty(lineStartEscapeOption) ? [lineStartEscapeOption.pattern, lineStartEscapeOption.replacement] : undefined; const globalEscapeOption = this.getNodeParameter( 'options.globalEscape.value', i, {}, ) as IDataObject; options.globalEscape = !isEmpty(globalEscapeOption) ? [globalEscapeOption.pattern, globalEscapeOption.replacement] : undefined; options.ignore = options.ignore ? (options.ignore as string).split(',').map((element) => element.trim()) : undefined; options.blockElements = options.blockElements ? (options.blockElements as string).split(',').map((element) => element.trim()) : undefined; const markdownOptions = {} as IDataObject; Object.keys(options).forEach((option) => { if (options[option]) { markdownOptions[option] = options[option]; } }); const html = this.getNodeParameter('html', i) as string; const markdownFromHTML = NodeHtmlMarkdown.translate(html, markdownOptions); const newItem = JSON.parse(JSON.stringify(items[i].json)); set(newItem, destinationKey, markdownFromHTML); returnData.push(newItem); } if (mode === 'markdownToHtml') { const markdown = this.getNodeParameter('markdown', i) as string; const destinationKey = this.getNodeParameter('destinationKey', i) as string; const options = this.getNodeParameter('options', i) as IDataObject; const converter = new Converter(); Object.keys(options).forEach((key) => converter.setOption(key, options[key])); const htmlFromMarkdown = converter.makeHtml(markdown); const newItem = JSON.parse(JSON.stringify(items[i].json)); set(newItem, destinationKey, htmlFromMarkdown); returnData.push(newItem); } } catch (error) { if (this.continueOnFail()) { returnData.push({ error: (error as JsonObject).message }); continue; } throw error; } } return [this.helpers.returnJsonArray(returnData)]; } }